Videoconferences

This page is to help to guide mentors and teachers in planning the masterclass videoconference.

Short URL for this page: http://tiny.cc/fnalvc.

 

Navigation

 

 

 

CERN, GSI, and KEK videoconferences

Registration

Registration polls are closed. To register or obtain further information, please email the videoconference coordinator:

• CERN - Uta Bilow
• GSI - Yiota Foka
• KEK - Rok Pestotnik

 

 

Fermilab videoconferences

Registration 

Registration polls are closed. To register or obtain further information, please email the videoconference coordinator:

• Fermilab/LHC - Kenneth Cecire
• Fermilab/Neutrino - Shane Wood or Spencer Pasero

 

 

Connections

Fermilab institutes connect to videoconferences through Zoom. Channels are indicated in the schedule.

 

2023 Schedule for ATLAS masterclass videoconferences moderated by Fermilab

This will be updated as registrations are received.

Times(TBA) are in U.S. Central Time. (Convert to your time zone.) This schedule is subject to change.

Date/time (U.S. Central Time)	Institutes	Moderator(s)	Staff	Zoom link
Sat 25 Feb/10:00	LisboaUni	Conde, Van de Wall	Cecire, Wood	FNAL-IMC-A
Fri 03 Mar/15:00	Stillwater A, Ruston	Assamagan, Bhopatkar	Trapp, Cecire	FNAL-IMC-A
Sat 04 Mar/15:00	Santa Cruz	Assamagan	Wetzler	FNAL-IMC-A
Thu 09 Mar/15:00	Dallas	Foti, Uribe	Cecire, Wadness	FNAL-IMC-B
Tue 14 Mar/13:45	DeKalb	Glover	Wadness	FNAL-IMC-A
Sat 25 Mar/10:00	Coimbra, Evora, LisboaLIP	Peixoto, Van de Wall	Wetzler	FNAL-IMC-A
Sat 25 Mar/15:00	Stillwater C w/Houston	Glover. Natale	Wetzler, Trapp	FNAL-IMC-B
Fri 31 Mar/15:00	Stillwater D	Hall	Cecire	FNAL-IMC-A

 

 

2023 Schedule for CMS masterclass videoconferences moderated by Fermilab

This will be updated as registrations are received.

Times(TBA) are in U.S. Central Time. (Convert to your time zone.) This schedule is subject to change.

Date/time (U.S. Central Time)	Institutes	Moderator(s)	Staff	Zoom link
Sat 25 Feb/15:00	Buffalo, Uramita	Albrow, Norberg	Cecire, Wood	FNAL-IMC-C
Tue 28 Feb/15:30	NotreDame, Puebla A	Rahmat, Martinez	Wood	FNAL-IMC-C
Thu 02 Mar/09:00	Constantine	Hall	Cecire	FNAL-IMC-C
Sun 05 Mar/14:00	Baltimore	Mantilla	Wegner	FNAL-IMC-C
Thu 09 Mar/20:00	Singapore	Yu	Cecire	FNAL-IMC-C
Fri 10 Mar/17:00	Honolulu, MexicoCity-Ibero	Uribe, Natale	Wegner	FNAL-IMC-C
Sat 11 Mar 15:00	Boston, Hermosillo, Medellin, Williamsburg	Malik, Vazquez	Wegner	FNAL-IMC-B
Sat 11 Mar/15:00	Orange, Seattle	Adelman	Cecire	FNAL-IMC-C
Thu 16 Mar//02:45	Shanghai	Natale	Cecire, Klammer	FNAL-IMC-C
Sat 18 Mar/15:00	Hammond, West Lafayette	Natale, Norberg	Cecire?	FNAL-IMC-C
Fri 24 Mar/21:00	Auckland	Wood	Glover	FNAL-IMC-C
Sat 25 Mar/15:00	Houston w/Stillwater C-ATLAS	Natale, Glover	Trapp, Wetzler	FNAL-IMC-B
Sat 25 Mar/16:00	Montelibano, Cuenca, Quito-EPN, Quito-USFQ	Glover, Capdevilla	Trapp	FNAL-IMC-C
Thu 30 Mar/15:00	MexicoCity-PrepaIbero, Osorio	Uribe, Ventura	Cecire	FNAL-IMC-C
Fri 31 Mar/14:00	ManhattanKS, PueblaC	Hall, Gerber	Cecire	FNAL-IMC-C

 

 

2023 Schedule for MINERvA masterclass videoconferences moderated by Fermilab

This will be updated as registrations are received.

Times (TBA) are in U.S. Central Time. (Convert to your time zone.) This schedule is subject to change.

Date/time (U.S. Central Time)	Institutes	Moderator(s)	Staff	Zoom link
Sat 04 Mar/15:00	FtCollins	Junk	Wood*	FNAL-NuMC
Tue 07 Mar/15:00	Lead	Norrick	Plucinski, Randall	FNAL-NuMC
Fri 10 Mar/09:00	Valencia	Olivier	Pasero	FNAL-NuMC
Wed 15 Mar/12:00	Canadaigua	Oliver	Pasero	FNAL-NuMC
Sat 25 Mar/08:00	Constantine, Kolkata	Fields, Junk	Wood	FNAL-NuMC
Sat 25 Mar/14:00	Duluth, Mayaguez	Fields, Junk	Wood	FNAL-NuMC

NOvA masterclass videoconference moderated by Fermilab

Date/time (U.S. Central Time)	Institutes	Moderator(s)	Staff	Zoom link
Sat 11 Mar	Minneapolis		Wood	FNAL-NuMC
Sat 25 Mar	Irvine		Plucinski	FNAL-NuMC

 

 

2023 "Off-Shell" Schedule for ATLAS, CMS, MINERvA, and other masterclass videoconferences moderated by Fermilab or TRIUMF

This will be updated as registrations are received.

Times (TBA) are in U.S. Central Time. (Convert to your time zone.) This schedule is subject to change.

Date/time (U.S. Central Time)	Institutes	Measurement	Moderator(s)	Moderation Center	Staff	Zoom link
Sat 22 Apr	Berkeley/15:00	ATLAS	Bhopatkar	Fermilab	Wegner	FNAL-IMC-A
Sat 13 May	Lead	NOvA			Wood

 

 

Videoconferéncias de America del Sur en Español con CERN

Día	Institutos
Viernes 12 de mayo	Montevideo-UdeR, Bogotá-UNAL, La Plata-UNLP
Viernes 19 de mayo	Buenos Aires-UBA, Bogotá-UAN, ClusterChileno

 

 

 

Meet the Moderators

 

 

ATLAS

This page is to help to guide mentors and teachers in planning the masterclass with the ATLAS Z-path measurement.

 

Need more prep? Try our Instructional Screencasts! 

 

 

 

First things: Hypatia and the data

Each computer should have the latest version of the Hypatia program ready to run and at least one dataset of 50 events. 

Download:

• Hypatia 7.4← If the zip file does not download, copy the URL and run from a different window.

These must be uncompressed and placed in an easy-to-find folder in each machine.

 

Grab the data:

Each number corresponds to a group of datasets which should be enough for an entire institute. Each institute is assigned two of these, a primary group and a backup group in case of a large number of students; they are listed in the table below in that order. Within each numbered data group are datasets of 50 events, labelled by letters, A-T. Find your institute and download one set to each computer. You do not need to uncompress these. 

Data assignments for CERN masterclass institutes
Table of data assignments for Fermilab 2023 masterclass institutes.
Date	Institute, data groups	Institute, data groups	Institute, data groups	Institute, data groups
Sat 25 Feb	LisboaUni, 1 and 2
Fri 03 Mar	Stillwater A, 1 and 2	Ruston, 3 and 4
Sat 04 Mar	Santa Cruz, 5 and 6
Thu 09 Mar	Dallas, 7 and 8
Tue 14 Mar	DeKalb, 10 and 11
Fri 24 Mar	Stillwater B, 13 and 14
Sat 25 Mar AM	LisboaLIP, 1. 2, and  3	Coimbra, 4, 5, 10, and 11	Evora, 6 and 7
Sat 25 Mar PM	Stillwater C, 8 and 9
Fri 31 Mar	Stillwater D, 10 and 11
Thu 06 Apr	Accra, 1 and 2
Sat 22 Apr	Berkeley, 12 and 14
Fri 12 May	Bogota-UNAL, 1 and 2	La Plata, 3 and 4	Montevideo, 5 and 6	Santa Rosa, 7 and 8
Fri 19 May	Bogota-UAN, 7 and 8	Buenos Aires, 9 and 10	Chile, 11 and 12
Sat 20 Sep	George, 1 and 2

E-mail for data login and password.

 

Familiarize yourself:

• Documentation (ATLAS Guide for Tutors/Mentors)
• ATLAS Masterclass Paper
• ATLAS Masterclass Website

Share these with students when appropriate!

 

 

Students arrive

This should occupy the first 30-60 min:

• Registration: please have students sign in on a registration sheet with name, school, and teacher.
• Gateway experience: have a cloud chamber, e/m apparatus, or something similar to whet interest
• Ice-breaker activity: students in small inhomogeneous groups create 1-2 good questions about particle physics, ATLAS, and/or LHC.

 

 

Shift training

Get students ready for their data analysis shift! This will take about 3 hours, though parts of it can be moved to other times of the day.

Mentor presentation, 30-60 min:

• keep it interactive - ask questions about prior experience, shows of hands, wild guesses, etc.
• give students something to touch, e.g. a carbon-fiber straw from TRT
• connect to classroom prep
• touch on standard model
• talk about your research
• template

Tour, 30-60 min:

• adds much to the day - often most popular part
• if you have an accelerator to show, great!
• if not: any interesting labs, even if not particle physics, are still great
• have enthusiastic grad students around to chat and explain

Analysis Prep (30-60 min):

• Have a teacher lead this if practical
• Use/adapt the data analysis slides (PPT) (PDF).
• Important: go through 5-10 events from Group 1 Set A on the projector with the students. Show them how to:
  • Turn on Hypatia
  • Get the data
  • Set the pt cut
  • Put tracks into the invariant mass window
  • Save their data and upload to OPloT. (Show the 01-Jan-2012 sample.)
  • Identify events with them - ask them what is what. 

Lunch with a Physicist (30-60 min):

• This is also very popular and a great way for students to interact and get comfortable with scientists.

 

 

Data analysis

This is the heart of the masterclass and takes 60-90 min. There should be 2 students at each computer, cooperating to get their data measured. Mentors, tutors, and teachers should circulate to help the students analyze the events and work out any problems they have. Don't give them answers. Help them figure things out and learn to see data as scientist does. Remind them that each event is a candidate Z, Higgs, or something else - not a definitively identified particle.

Here are some items that can help them (and you):

• Data Tally Sheet
• Cheat sheet (short) (long)
• ATLAS Event Guide
• ATLAS Analysis Procedure 

Students will need to upload to OPlot. Help them with this.

• OPloT

 

 

Sharing results

This takes a little over one hour. Both parts are important.

Discussion (30-45 min):

• Mentor leads, students interact
• Look at combined mass plots for your institute in OPloT: dilepton, 4-lepton, diphoton
• Help students point out peaks, bumps, significance; discuss results.
• Each institute is assigned another institute to question: look at their data as well. Students should form questions and comments.

Videoconference (30-45 min):

• FNAL institutes connect to Indico page (see table above) 
• CERN institutes connect using special links CERN-VC1 and CERN-VC2; consult schedule for which to use.
• Someone should log into the videoconference 15 min early to be sure the connection is established. See the Schedules page.
• Follow the agenda on Indico:
  • Introductions and warm-up
  • Institute results
  • Combined results
  • Discussion, Q&A, and wrap-up
• It is good to have a student spokesperson but try to arrange so it is not too hard for another student to make a comment or ask a question.

After this, we have post-discussion and closeout.

Before you go home:

Please report your attendance numbers on our Attendance Form!

 

Have a great day!

 

CMS

This page is to help to guide mentors and teachers in planning the masterclass with the CMS WZH-path measurement..

 

Need more prep? Try our Instructional Screencasts!

 

 

First things: iSPy and spreadsheets

Each computer should have robust internet access (preferred) or the DVD version of the masterclass loaded. Two students should work together at each computer to complete 100 events of the 10 000-event sample.

Online: 

• Students must have access to the event display program iSpy-webgl using the latest version of Chrome, Edge, Firefox, or Safari.
• Students must have access to the online spreadsheet. These will be linked from the schedule of CMS videoconferences under Data Analysis below.
• Students should have access to the CMS Masterclass website prior to the masterclass day.

Download versions:

See documentation, below.

 

Grab the data:

See Data Analysis, below.

 

Familiarize yourself:

• CMS Masterclass screencasts
• CMS Masterclass documentation (2020 version - still in effect)
• CMS Masterlass website
• Try the measurement out with advanced iSpy and CIMA (use Examples-25Jan2020). 

Share these with students when appropriate!

 

 

Students arrive

This should occupy the first 30-60 min

• Registration: please have students sign in on a registration sheet with name, school, and teacher.
• Gateway experience: have a cloud chamber, e/m apparatus, or something similar to whet interest
• Ice-breaker activity: students in small heterogeneous groups create 1-2 good questions about particle physics, ATLAS, and/or LHC.

 

 

Shift training

Get students ready for their data analysis shift! This will take about 3 hours, though parts of it can be moved to other times of the day.

Mentor presentation, 30-60 min:

• keep it interactive - ask questions about prior experience, shows of hands, wild guesses, etc.
• give students something to touch, e.g. a wave-shifting fiber
• connect to classroom prep
• touch on standard model
• talk about your research
• template

Tour, 30-60 min:

• adds much to the day - often most popular part
• if you have an accelerator to show, great!
• if not: any interesting labs, even if not particle physics, are still great
• have enthusiastic grad students around to chat and explain

Analysis Prep (30-60 min):

• Have a teacher lead this if practical.
• Use/adapt the data analysis slides.
• Important: go through "masterclass-samples" in iSpy-online on the projector with the students:
  • Show students how to navigate to a data file
  • Discuss how to use the tools in iSpy-online (or iSpy-dvd)
  • Discuss each event in terms of:
    • Particle tracks, missing energy, ECal deposits, etc.
    • Most likely parent particle (ask them what is what)
  • Show how to record results on sample spreadsheet.

Lunch with a Physicist (30-60 min):

• This is also very popular and a great way for students to interact and get comfortable with scientists.

 

 

Data Analysis

This is the heart of the masterclass and takes 60-90 min. There should be 2 students at each computer, cooperating to get their data measured. Mentors, tutors, and teachers should circulate to help the students analyze the events and work out any problems they have. Don't give them answers. Help them figure things out and learn to see data as scientist does. Remind them that each event is a candidate Z, W, Higgs, or something else - not a definitively identified particle.

• Instructional screencast
• iSpy-webgl event display
• Cheat sheet
• CIMA data analysis tool.

Note: Google spreadsheets have been phased out in favor of CIMA. If there are special cicumstances, contact Ken Cecire for an exception.

 

 

 

Sharing Results

This takes a little over one hour. Both parts are important.

Discussion (30-45 min):

• Mentor leads, students interact
• Look at combined mass plots for your institute in spreadsheet.
• Help students point out peaks, bumps, significance; discuss results.
• Each institute is assigned another institute to question: look at their data as well. Students should form questions and comments.

Videoconference (30-45 min):

Connecting to videoconferences:

• For CERN-based videoconferences, see the schedule page of the IMC website.
• For Fermilab-based masterclasses, see the schedule on the Videoconferences page.

Course of a videoconference:

• Connect to videoconference link or Indico page (see above).
• Someone should log into the videoconference 15 min early to be sure the connection is established. See the Schedules page.
• Follow the agenda on Indico:
  • Introductions and warm-up
  • Institute results
  • Combined results
  • Discussion, Q&A, and wrap-up
• It is good to have a student spokesperson but try to arrange so it is not too hard for another student to make a comment or ask a question.

After this, we have post-discussion and closeout.

Before you go home:

Please report your attendance numbers on our Attendance Form!

 

CMS Documentation

2020 Edition

 

Short URL for this page: http://cern.ch/go/76BG.

This document in PDF form: CMS_Masterclass_Documentation_06Feb2020.

 

CMS WZH 2,4-Lepton Measurement 

For "classic" CMS WZH 2-lepton measurement, go to CMS Masterclass 2019 Documentation.

 

Created by K. Cecire, T. McCauley, QuarkNet LHC fellows 

 

The CMS WZH measurement is supported for International Masterclasses. 

 

Languages supported: Chinese, Dutch, English, French, German, Hebrew, Hungarian, Italian, Japanese, Polish, Portuguese, Russian, Spanish, Turkish 

 

Contents:

• Description
• Requirements for hardware and software
• Outline of the day
• Student procedure
• Presentation of results
• Sample questions
• Moderators
• Material for students and teachers

 

Description

• Students use event display of (mostly) leptonic decays to determine
  • final state: 1 electron plus missing E_T, 1 muon plus missing E_T, 2 electron, 2 muon, 4 electron, 4 muon, or 2 electron and 2 muon (note that lepton pairs should contain one negative matter lepton and one postive antimatter lepton)
  • charges of leptons, especially for one lepton plus missing E_T
  • primary state: W+, W-, W± (indicating electric charge unknown), neutral particle, zoo
  • charge if W, using curvature of electron or muon tracks,
• Students use particle counts to find e:µ and W+:W- ratios.
• Students create mass plots. They find the masses of neutral particle peaks in two mass histograms: 2-lepton and 4-lepton. Histograms are fed automatically upon entry of masses. 
• Students use the iSpy-webgl event display and the CMS Instrument for Masterclass Analysis (CIMA). Instructional screencasts are available.

Dataset: There are 190 .ig data files in the iSpy event display. Each file contains 100 events. These files are made up varying mixtures from 10,000 1 and 2 lepton events and about 300 4-lepton events in varying mixtures, They are divided into data groups: N5, N10, N25, N50, and N100. The number after N refers to how many data files are in that data group. The ~300 4-lepton events are distributed equally in each group. Thus in group N5, each file has about 300/5 = 60 evetns with 4 leptons and 40 of everything else. In group N100, each file has about 3 events with 4 leptons and 97 events of other kinds. This is to accommodate masterclasses with different numbers of students.

 

Requirements

for hardware and software.

Online:

• Reliable, high-speed internet connection
• Up-to-date version of Firefox, Chrome, Edge, or Safari

Offline:

• Not recommended: use "classic" CMS WZH Dilepton Masterclass in this case or contact CMS masterclass coordination.

 

Outline of the day

This is not a final schedule but an outline for most U.S. institutes.

• Arrival/Registration (~30 min)
• Cloud chamber, e/m apparatus, or other "gateway experience" apparatus setup for students to inspect
• Start and Ice-breaker activity (~30 min)
  • Students in small groups create 1-2 good questions about particle physics and/or LHC. Where practical, groups should be made of students from different schools.
• Mentor presentation
  • Template (~60 min, including Q&A)
• Tour of facilities/labs/cool stuff (~45 min)
• Analysis preparation (1-2 teachers facilitate; ~60 min, including Q&A)
  • Presentation (template)
  • Data analysis slides
  • Guided practice with discussion
• Lunch with a physicist (~60 min)
• Data Analysis (~90 min)
  • Cheat sheet
• Pre-conference (~30 min)
  • Students and mentor discuss meaning of analysis results.
  • Students and mentor discuss questions for other institutes.
  • Revisit questions from ice-breaker, discuss which to ask in video conference.
• Designated IT expert preps video connection.
• Videoconference (~30 min)
  • Greetings
  • Presentation of results
  • Discussion of results
  • Q&A
• Summing up and evaluation (~15 min)

Student tasks: 

• Each pair of students analyzes a set of 100 events
• For each event, distinguish between electron and muon decay and between
  • W+ or W- candidate (recorded as "W±" if charge cannot be determined),
  • Neutral Particle (Z, H  or other "neutral particle" candidate),
  • and zoo event (unusual and cannot be characterized).
• Record into CIMA.
• Be prepared to discuss in Masterclass Institute and in videoconference; prepare good questions.

 

Student procedure

It is important to carefully note the following:

1. Mentors and tutors need to be familiar with CIMA in order to guide the students successfully. 
2. The description below is for the current version of the iSpy event display and advanced CIMA used for the CMS WZH 2,4-lepton masterclass. (Note that these are still development versions but will be moved soon to production servers.) This is the primary version used in International Masterclasses.
3. The "classic" WZH diplepton masterclass uses the "classic" iSpy-webgl. and "classic" CIMA. For a description of how to use these, see the CMS WZH Masterclass 2019 Documentation.
4. The legacy iSpy-online is still recommended for the J/Psi-path masterclass. This is described on the CMS masterclass webstie J/Psi-path page.

Mentors should guide students to follow these procedures for the use of iSpy and CIMA:

Screencast: https://www.screencast.com/t/lFq86uolB.

• Pairs of students are assigned sets of 100 events to analyze in iSpy-online or iSpy-dvd.
• Event sets are found in the iSpy by choosing the folder icon (top left).
• A first window appears. If the data is to be taken from the internet, choose "Open file(s) from web" in this window. If the data is offline, choose the button under "Open local file(s)" and navigate to the file. Either way, a second window will open.
• In the second window, students first choose their data group - N5, N10, N25, N50, or N100 according to their assignment. After choosing a group, they will see a set of data files labeled masterclassyear_n.ig, where year is the year of creation of the file (currently 2019) and n is the number of the data file. For N5, n = 1, 2, ..., 5; for N10, n = 1, 2, ..., 10, etc.  The entire set of 100 events will then load into the browser. This may take some time but going from event to event is rapid after that.
• After the set of 100 events is loaded, a list of events in that set will appear on the left side of the window. The student chooses the first of these events and then the "Load" button. This will open the first event.
• Students also open CIMA and then find their masterclass by date ("Choose your Masterclass") and then institute ("Choose your location"). They then choose the number of their event set ("Choose your file"): this is the same number as the event set in iSpy but rendered a N.n, That is, group N25, file 6 is rednered as 25.6.
• Notes on CIMA for students:
  • All institutes are strongly encouraged to use advanced CIMA rather than a local spreadsheet. 
  • CIMA will have your date and your institute from to choose.
  • Advanced CIMA automatically populates the mass histograms. This is no long something students do manually as in the "classic" version..
  • CIMA is also linked at the CMS Library page (scroll down to Data Analysis).

 

Find the correct data files in iSpy and CIMA:

After iSpy is open, go the the file folder and, when the pop-up box appears, choose "Open files from web",

Then choose the assigned data group (N5, N10, ...). A list of data files will appear. Choose the assigned file. Then choose the first event and the Load button.

The first event will appear.

Set it to the x-y (end) view by choosing the x-y button (1). Remove unwanted low energy tracks by unchecking Tracks (reco.) (2).  You can use the magnifying glass buttons (3) to zoom in or out and the right (left) arrow button (4) to go to the next (previous) event. This is the result of doing all 4 of these:

This display shows the final state of the event. The red tracks are muon tracks as identified by the analysis software. Note the red boxes: they are muon chambers intersected by the muons. One can see by the opposite curvatures of the tracks in the x-y plane (transverse to the beamline and to the magnetic field) that they are of opposite electrical charges. In these renderings, a clockwise curvature indicates positive change and an anti-clockwise curvature indicates negative charge. 

The two muons may have come from a primary state particle. To find its mass, we can move our mouse until one track turns gray, click, move again until the second track turns gray, and click again. This is what happens:

We then press m on the keyboard and the mass of the primary state particle appears:

Note that the muon tracks are reset to red once the mass appears.

What we do with this data is what goes in CIMA. Here it is:

We now choose our masterclass, location, and data file (10.4, same as we saw in iSpy above).

When we open data file 10.4, we see that event 10.4-1 is already done. We must add results for 10.4-2, seen in the iSpy images above. From the left, we see it is loaded as event 2, it is a dimuon event so we choose μμ for Final State, we pick Neutral Particle for Primary State, and we enter the 10.27 we have for the mass is GeV:

When we choose the Next button, the results are recorded for 10.4-2 just as they were for 10-4.1. We return to iSpy and advance to the next event and the next, recording results in CIMA as we go. At 10.4-4, for example, we have a single-muon plus missing E_T event:

The purple or pink line is indicative of missing E_T, presumably a neutrino. Note that the muon is negative because the track curves anti-clockwise in the magnetic field. Thus we this this is a W- candidate event, in whihc the W- decayed into a muon and a muon anti-neutrino. We can record this in CIMA as μν for the Final State and W- for the Initial State. We do not try to find or record a mass for any W candidate. CMS can only find the transverse mass of a W candidate and these cannot mix into our mass hisotgrams in any meaningful way. Here is how it is recorded:

Here is the recorded result after we choose Next and have our first four events:

Continuing on, when we get to Event 10.4-9, we find two electrons (green tracks) but the seem rather short and without much of the characteristic energy deposit which follows the track:

Let's look at the y-z view:

We can see the energy deposits (they look like 3-D histograms) and the reader will notice that we have already found the mass of the primary state particle. We enter it into CIMA:

Then we choose Next:

There is enough here to look at the other tabs. Here are the histograms we have so far with this very small data sample (2-lepton above, 4-lepton below):

This is not much to look at yet but a whole class of students, with every 2 taking on a 100-event data file, can populate it a bit more.

Here is our Results tab:

Note the key ratios at the bottom. Our expectation is e/μ = 1 and W+/W- = 1.4 but results will vary quite a lot.

 

 

In summary, students use event display of (mostly) leptonic decays to determine

• Final state lepton ID (electron, muon). This is to characterize the event, not individual particles.
  1. If the event has one muon track (long, red) and missing E_T (purple or pink line) is is a μν event.
  2. If the event has one electron track (short, green) and missing E_T (purple or pink line) is is an eν event.
  3. If it has two muon tracks (actually likely a muon-antimuon pair) it is a μμ event
  4. If the event has two electron tracks (actually likely an electron-positron pair) is is an ee event.
  5. If it has 4 short green electron tracks it is a 4e event.
  6. If it has 4 long red tracks is is a 4μ event.
  7. If it has 2 short green and 2 long red tracks it is a 2e2μ event.

• Likely particle ID (final state) 
  • W candidates are cases 1 and 2 above. The charge of the W boson can usually be determined from the curvature of the visible lepton track in the x-y view: positive for clockwise, negative for anti-clockwise. If the curvature cannot be detected then the final state is W±, meaning we cannot determine the charge. 
  • Neutral Particles are cases 3-7.
  • Cases 3 and 4 are 2-lepton events and their masses should show up in the upper mass histogram. 
  • Cases 5-7 are in 4-lepton events and their masses should show up in the lower mass histogram.
  • Some events will have multiple lepton tracks plus missing Et. The student can choose a track with the cursor (tunring it gray) and a track information will appear in the table below the image in iSpy. The most important of these is transverse momentum, pt. This can be used to distinguish which tracks are important and which are low-energy background.
  • Zoo events are "none of the above" but there can be interesting events among these.

 

 

Presentation of results

The mass plots and summary of results are automatically built in the institute (location) Mass Histogram and Results pages. The upper (2-lepton) mass plot will show not only a Z peak but also peaks due to other particles. The results will show the numbers of electron, muon, W+, W-, W± (unknown charge), Neutral Particle candidates, and zoo events plus the key ratios e:μ and W+:W-. The mentor or tutor should project the mass plot and the count/ratio results and discuss their signficance with students. The mentor or tutor should also help the students to generate questions for the videoconference or other later discussion.

 

For Fermilab-based videoconferences, the mentor should show the students the Mass Histograms and Results for another institute. Each institute is assigned another one to which they may ask one or two questions. In our example, Buffalo may ask questions of Mexico City and Mexico City may ask questions of Quito, etc.

 

Sample questions

In discussion, the moderator might ask students

• How many peaks are there in the 2-lepton mass plot?
• Where is the Z peak? What is the mass of the Z boson?
• What do the other peaks mean?
• Is there a Z-peak in the 4-lepton plot? If so, why?
• What else can we see in the 4-lepton plot. Is there evidence of the Higgs boson? What else?
• What is the ratio of electrons to muons? Is it close to what we should expect?
• What is the W+:W- ratio? What should it be?

In the videoconference, students might ask questions like

• Why are the widths or heights or numbers of peaks different from one Institute to the next?
• Why do different Institutes get different ratios? How did they identify electrons or muons or W candidates or Z candidates or zoo events? How did they measure charge for W candidates?
• Now that the Tevatron is shut down, what do you do at Fermilab?
• Is it boring at CERN when the LHC is not running?
• Why did you become a physicist?

...and better questions which only students can create. 

 

 

Moderators

Fermilab-based moderators should refer to the FNAL Masterclass Moderators page.

 

All moderators should note the following:

As long as all groups use advanced CIMA, moderators do not need to look for uploads from any of the masterclass institutes or make histograms on their own. There is one "Table" for each masterclass institute (location) participating in a single videconference. Each institute has a Mass Histrogram and a Results page.

• Mass Histograms - students use "Events Tables" to record W or Neutral Particle (J/Ψ, Υ, Z, Zγ, H, ZZ candidates), e or µ events, and "zoo" events. 
• The Neutral Particle candidates may show up in the 2-lepton and 4-lpeton mass plots. The plots populate autmatically as students work.
• Results - numbers of different types of particles are automatically transferred here; e:µ and W+:W- are calculated for the whole institute.

The moderators will access the Admin page of CIMA to view these and share them on Vidyo. They will also view and share the combined Mass Histogram and combined Results for all institutes participating in their videoconference.

To get to the appropriate places, moderators only should go to the CIMA Admin page. 

 

Then:

1. Log in. The user name and password will be sent separately.
2. Please do not touch anything above Manage Tables or the "change active status" or "delete" buttons..
3. Go to the part of the page under Masterclasses beneath the Manage Tables heading. 
4. Choose the appropriate masterclass. Below we choose NCU-TW-05Jan2020.
5. We then choose the Results button.

You are now on the Results tab for combined results for all institutes in the videoconference.

In this case, there are only two: TW_workshop_Jan2020 and AAPT_WM_2020. You can then choose the Mass Histogram tab to view the mass plots.

To choose results for a particular institute (and you should do this for each one), use the browswer bakc arrow to back out to the main CIMA admin page. Then choose the overall masterclass and the individual masterclass:

 

Moderators should discuss the results from each institute and the overall results with the students, making sure to stay within time constraints. If an institute does not use the online spreadsheet, the mentor for that institute should show their mass plot and results using Vidyo desktop sharing. (This may occur due to bandwidth issues or if if a group uses the "classic" WZH 2-lepton masterclass.)

The two mass plots for the combined results are below with annotations. Even with a relatively small number of events, we can see a basic outline with key peaks, though as it turns out the Higgs peak is probably exaggerated in this sample.

 

 

Material

for students and teachers:

• Classroom prep activities
  • Rolling with Rutherford at https://quarknet.org/data-portfolio/activity/rolling-rutherford
  • Particle cards at https://quarknet.org/data-portfolio/activity/shuffling-particle-deck
  • Quark workbench at https://quarknet.org/data-portfolio/activity/quark-workbench
  • Calculate the mass of the top quark from Tevatron data at https://quarknet.org/data-portfolio/activity/calculate-top-quark-mass
  • Calculate the mass of the Z boson from LHC data at https://quarknet.org/data-portfolio/activity/calculate-z-mass
• Aid in masterclass
  • Analysis presentation at https://quarknet.org/sites/default/files/cms_analysis_18nov2019_0.pdf
  • CMS Masterclass "Cheat Sheet" at https://quarknet.org/sites/default/files/cmscheat_wzh16_v0.pdf
  • Student webcast on using iSpy-webgl: View on YouTube.
  • iSpy/CIMA webcast: View on screencast.com.

 

Moderators' Page

Moderator Orientations

CERN: https://indico.cern.ch/event/1118890/

FNAL:

For orientation, moderators should watch the videos and read the documents that apply. Provision will be made for Q&A and discussion. Zoom connection information is in the Moderation Schedules below.

Step 1: Videos	Step 2: Documents	Step 3: Q&A
Intro to IMC ATLAS measurement CMS measurement MINERvA measurement Videos for students and teachers Moderator orientation for CERN	Masterclass videocon plan Moderator questions for students: LHC MINERvA Ver 1 MINERvA Ver 2 Suggestions for moderators Fermilab stories	Email: Ken (CMS, ATLAS, IMC coordination) Spencer (MINERvA) Shane (MINERvA, NOvA pilot) FNAL Moderator Discussion Time: unscheduled - email Ken to arrange your own Q&A

 

Options

Register to be a moderator by e-mail . Return to Project Map.   Return to current Videoconferences page.

 

FNAL

2023 Schedule for ATLAS masterclass videoconferences moderated by Fermilab

This will be updated as registrations are received.

Times(TBA) are in U.S. Central Time. (Convert to your time zone.) This schedule is subject to change.

Date/time (U.S. Central Time)	Institutes	Moderator(s)	Staff	Zoom link
Sat 25 Feb/10:00	LisboaUni	Conde, Van de Wall	Cecire, Wood	FNAL-IMC-A
Fri 03 Mar/15:00	Stillwater A, Ruston	Assamagan, Bhopatkar	Trapp, Cecire	FNAL-IMC-A
Sat 04 Mar/15:00	Santa Cruz	Assamagan	Wetzler	FNAL-IMC-A
Thu 09 Mar/15:00	Dallas	Foti, Uribe	Cecire, Wadness	FNAL-IMC-B
Tue 14 Mar/13:45	DeKalb	Cecire	Cecire	FNAL-IMC-A
Sat 25 Mar/10:00	Coimbra, Evora, LisboaLIP	Peixoto, Van de Wall	Wetzler	FNAL-IMC-A
Sat 25 Mar/15:00	Stillwater C w/Houston	Glover. Natale	Wetzler, Trapp	FNAL-IMC-B
Fri 31 Mar/15:00	Stillwater D	Hall	Cecire	FNAL-IMC-A

 

 

2023 Schedule for CMS masterclass videoconferences moderated by Fermilab

This will be updated as registrations are received.

Times(TBA) are in U.S. Central Time. (Convert to your time zone.) This schedule is subject to change.

Date/time (U.S. Central Time)	Institutes	Moderator(s)	Staff	Zoom link
Sat 25 Feb/15:00	Buffalo, Uramita	Albrow, Norberg	Cecire, Wood	FNAL-IMC-C
Tue 28 Feb/15:30	NotreDame, Puebla A	Rahmat, Martinez	Wood	FNAL-IMC-C
Thu 02 Mar/09:00	Constantine	Hall	Cecire	FNAL-IMC-C
Sun 05 Mar/14:00	Baltimore	Mantilla	Wegner	FNAL-IMC-C
Thu 09 Mar/20:00	Singapore	Yu	Cecire	FNAL-IMC-C
Fri 10 Mar/17:00	Honolulu, MexicoCity-Ibero	Uribe, Natale	Wegner	FNAL-IMC-C
Sat 11 Mar 15:00	Boston, Hermosillo, Medellin, Williamsburg	Malik, Vazquez	Wegner	FNAL-IMC-B
Sat 11 Mar/15:00	Orange, Seattle	Adelman	Cecire	FNAL-IMC-C
Thu 16 Mar//02:45	Shanghai	Natale, Barney	Cecire, Klammer	FNAL-IMC-C
Sat 18 Mar/15:00	Hammond, West Lafayette	Natale, Norberg	Cecire?	FNAL-IMC-C
Fri 24 Mar/21:00	Auckland	Wood	Glover	FNAL-IMC-C
Sat 25 Mar/15:00	Houston w/Stillwater C-ATLAS	Natale, Glover	Trapp, Wetzler	FNAL-IMC-B
Sat 25 Mar/16:00	Montelibano, Cuenca, Quito-EPN, Quito-USFQ	Glover, Capdevilla	Trapp	FNAL-IMC-C
Thu 30 Mar/15:00	MexicoCity-PrepaIbero, Osorio	Uribe, Ventura	Cecire	FNAL-IMC-C
Fri 31 Mar/14:00	ManhattanKS, PueblaC	Hall, Gerber	Cecire	FNAL-IMC-C

 

 

2023 Schedule for MINERvA masterclass videoconferences moderated by Fermilab

This will be updated as registrations are received.

Times (TBA) are in U.S. Central Time. (Convert to your time zone.) This schedule is subject to change.

Date/time (U.S. Central Time)	Institutes	Moderator(s)	Staff	Zoom link
Sat 04 Mar/15:00	FtCollins	Junk	Wood*	FNAL-NuMC
Tue 07 Mar/15:00	Lead	Norrick	Plucinski, Randall	FNAL-NuMC
Fri 10 Mar/09:00	Valencia	Olivier	Pasero	FNAL-NuMC
Wed 15 Mar/12:00	Canadaigua	Oliver	Pasero	FNAL-NuMC
Sat 25 Mar/08:00	Constantine, Kolkata	Fields, Junk	Wood	FNAL-NuMC
Sat 25 Mar/14:00	Duluth, Mayaguez	Fields, Junk	Wood	FNAL-NuMC

NOvA masterclass videoconference moderated by Fermilab

Date/time (U.S. Central Time)	Institutes	Moderator(s)	Staff	Zoom link
Sat 11 Mar	Minneapolis			FNAL-NuMC
Sat 25 Mar	Irvine			FNAL-NuMC

 

 

2023 "Off-Shell" Schedule for ATLAS, CMS, MINERvA, and other masterclass videoconferences moderated by Fermilab or TRIUMF

This will be updated as registrations are received.

Times (TBA) are in U.S. Central Time. (Convert to your time zone.) This schedule is subject to change.

Date/time (U.S. Central Time)	Institutes	Measurement	Moderator(s)	Moderation Center	Staff	Zoom link
Sat 22 Apr/15:00	Berkeley	ATLAS	Bhopatkar
Sat 13 May	Lead	NOvA

 

Videconference Plan

Times will vary. Revised Feb 2022. There is no provision for reports from Institutes*. 

Time from start	Item	Remarks
-00:10	Moderators arrive; institutes log in	test and establish video and audio connections
+00:00	Start	introductions of moderators, institutes, map; warm-up questions may do Quiz as part of warm-up or at end of Q&A (details below) - adjust times accordingly
+00:05	Combined results	moderators present and ask questions, lead discussion for LHC masterclasses, show ATLAS or CMS "pro" results
+00:15	Q&A	moderators take questions from students
+00:25	Quiz	time allowing (10 question version) (5 question version)
+00:35	Videoconference ends	time varies

*Some will present results anyway. That is OK.

Suggestions on how to be an effective Masterclass moderator:
You might know most of this already...but we still need to remind ourselves. Please send in items to add to this list.

• Speak clearly and succinctly
• Show your sense of humor
• Avoid too many explanations: draw ideas from students and then help them
• When you do explain, keep it short and direct
• Encourage students to speak up, give their views, and back them up
• Mind the schedule
• Be friendly
• It is alright to disagree...with mentors, students, or each other
• Let students get a feel for how you see data and analysis
• Be familiar with the Masterclass measurement
• Show your enthusiasm
• Work as a team

 

Suggested background images for your videocon:

• Wilson Hall with IERC (artistic)
• Wilson Hall, FNAL 50th
• Broken Symmetry and sign
• Atrium
• ROC
• International Masterclasses logo

 

 

Orientation

Orientation Schedule 2023

Start time in CT and facilitator in parentheses. New registrants: we can accommodate days and times not yet shown on this schedule. Zoom channel links will be provided directly to participants.

Date 2022	ATLAS Orientation	CMS Orientation	ATLAS Update	CMS Update	Zoom Test
Mon 01 Mar	Dallas (16:00-18:00)
Sat 04 Mar		KSU (08:45-15:00 w/13:00 Zoom)
Thu 09 Mar	Lusaka (08:00-09:30)

* Site visit.