LHC Fellows Workspace

Submitted by kcecire

on Monday, October 8, 2012 - 10:48

This is where LHC and Neutrino fellows try out ideas, build agenda pages, and keep our important docs. 

Description

Development and utilities for the QuarkNet LHC fellows.

CMS at P5 and CERN: Battle of the Bosons

kcecire's picture
Submitted by kcecire on Thu, 09/12/2013 - 17:09

Version français

 

Learn about the events!

 

Use the Guide Sheet

View the Screencast


View the slides.


Play with the CMS Animation

 

Try out some particle IDs!

Sample Event 1

Is it a W+, W-, Z, or Higgs?
Sample Event 2

Is it a W+, W-, Z, or Higgs?
Sample Event 3

Is it a W+, W-, Z, or Higgs?
Sample Event 4

Is it a W+, W-, Z, or Higgs?

 

 

 

 

See the results!

Coming soon....
 

 

 

More stuff!

 

IMC Classroom Prep

kcecire's picture
Submitted by kcecire on Wed, 09/11/2013 - 13:24

Evaluation data has shown that students who have been prepared for masterclasses report getting significantly more our of them and like them better.

 

Prior Knowledge for Masterclasses / Classroom Prep Objectives

Meeting these objectives will assure that students are well prepared for the masterclass.

  • Describe the claim and indirect evidence in Rutherford's or another key experiment.
  • Identify the peak in a histogram and explain what it means.
  • Describe how quarks combine to form mesons and baryons.
  • Apply conservation rules to measurements to provide evidence for unobserved particles.

Suggested Activities


Particle physics research requires the use of indirect evidence to support claims.
Rolling with Rutherford
Students will be able to:

  • Describe the claim and indirect evidence in Rutherford’s experiment.
  • Identify the peak in a histogram and explain what it means.

 

The Standard Model is the current theoretical framework for our understanding of matter.
Quark Workbench (instructions)
Students will be able to:

  • Describe how quarks combine to form mesons and baryons.

 

The behavior of particles is governed by conservation laws and mass-energy conversion.

Choose one or both:

Students will be able to:

  • Apply conservation rules to measurements to provide evidence for unobserved particles.

 

Additional Resources

CMS@CSI&ND2013: Event IDs

kcecire's picture
Submitted by kcecire on Sat, 09/07/2013 - 09:53

What are they?

                             Sample Event 1                                                                    Sample Event 2

  

                       It's a Z boson candidate!                                                     It's a W+ boson candidate!

 

                               Sample Event 3                                                                    Sample Event 4      

  

                    It's a Higgs boson candidate!                                                     It's a W- boson candidate!

 

                                                       

 

                                                         

 

CMS@CSI&ND2013: Event Analysis Training

kcecire's picture
Submitted by kcecire on Fri, 09/06/2013 - 14:49

Tiny URL for this page: http://tinyurl.com/cmscsind2013.

Learn about the events!


Use the Guide Sheet

View the Screencast


Play with the CMS Animation

 

Try out some particle IDs!

Sample Event 1

Is it a W+, W-, Z, or Higgs?
Sample Event 2

Is it a W+, W-, Z, or Higgs?
Sample Event 3

Is it a W+, W-, Z, or Higgs?
Sample Event 4

Is it a W+, W-, Z, or Higgs?

 

 

 

 

See the results!


Mass plot from data collected between CSI start at 10:00 am and 1:30 pm.

Mass plot from data collected between 1:30 pm and CSI ending at 5:00 pm.

Combined mass plot for the entire day of CSI 2013.

 

More stuff!

 

CMS Data Express

kcecire's picture
Submitted by kcecire on Mon, 07/22/2013 - 21:47

Introduction 

CMS Data Express is a short particle physics masterclass investigation that can be used as part of a workshop or as a short class project. The main goal is to separate Z candidate events from other events by visual inspection and then create a mass plot for the Z boson.

The Z boson is important in LHC discovery science and as a marker for calibration of LHC detectors: it is a well-known particle, so the location and width of the mass plot give physicists a good idea of how the detector is performing. The Z candidate events are "dimuon" events; the Z can decay into a muon pair. Z candidates are identified by 2 long muon tracks. Participants will search for Z candidates in the data.

The W candidate events consist of decays into single muons and neutrinos. However, the neutrinos do not interact with the detector and hence leave no tracks or energy deposits; their momenta are estimated by a process of summing all the momenta in the event to determine what is "missing". Thus a W candidate appears as a single long muon track in the detector.

Instructions

Individual or pair:

  • Participate in analysis prep seminar
  • Open the event display file
  • Go to set of events assigned
  • Categorize and record each event as
    • W+ candidate (one muon track deflected clockwise) 
    • W- candidate (muon track defelcted counterclockwise) 
    • W candidate (muon track not clearly deflected; charge cannot be determined)
    • Z candidate (2 distinct muon tracks)
    • Unknown 
  • For each Z candidate, note the mass, round to nearest odd number, record
  • When finished, count
    • how many instances of each odd number you have recorded.
    • how many W+ candidates you have.
    • how many W- candidates you have.

Group:

Use your own resources or the data combination spreadsheet (Download xls) to

  • Combine numbers of "odd masses" in all groups
  • Create a histogram for whole group to observe
  • Add numbers of all W+ candidates and all W- candidates; find ratio W+/W-

Discussion

The histogram created by the group is a mass plot. Since the mass of any one type of particle is uncertain by nature and due to experimental uncertainty, it will have a distribution the peak of which is the experimental determination of the mass. Creation of mass plots and other histograms are the central measurements made in the CMS e-Lab but with many more events than used in this exercise.

The ratio W+/W- is a probe of the proton structure and a comparison to the performance of CMS over a much larger data set.

 

Resources

CMS e-Lab suggested investigations

kcecire's picture
Submitted by kcecire on Sun, 07/14/2013 - 16:15

 

Introductory:

  • J/Psi mass (must bin appropriately) 
  • compare Z-->mumu and Z-->ee
  • Find how many peaks correseponding to real particles are in the 100k dimuon spectrum
  • Show advantages and disadvantges of log x and log y plots
  • Investigate use of bin widths to understand data
  • global muon study
  • charge study

 

Challenge:

  • lifetime of particle
  • find cosmic rays in data
  • use Advanced in plot selection
  • investigate parameters of detector through Advanced plots
  • study and characterize background(s) in plot(s)

 

Resources: AAPT Modern Physics in the High School Classroom

kcecire's picture
Submitted by kcecire on Fri, 07/12/2013 - 17:24

AAPT Summer Meeting 2013 Session AF

Links:

Downloads: 

Contacts:

Data Workshop and CMS e-Lab Workshop pre-flight

kcecire's picture
Submitted by kcecire on Mon, 06/24/2013 - 09:55

 

 

Lead Teachers and Mentors should prepare the following for a workshop: 

Preliminary (at least one week before workshop)

  • Communicate with facilitator on prior knowledge and experience level of teachers
  • Survey teachers on accounts: http://goo.gl/forms/yoKKBt5DCS
  • Vidyo test for Virtual Visit (VV is optional) 

Materials

  • Name tags and markers/pens 
  • Protractors and rulers (Data Workshop only; more below)
  • Possible activity printouts (see below)
  • Poster paper or whiteboards

Venue

  • Tables, outlets, lighting, space, etc.
  • Set-up and clean-up of room
  • Venue/parking passes if needed
  • Food related: tea, snack, lunch?
  • One computer for each 1-2 participants with good internet connection
  • Projector and screen
  • Black/white board & marker
  • Materials for whiteboarding or similar activities
  • Access to a printer

Human

  • Mentor presence in workshop
  • Physicist to speak on CMS, ATLAS, LHC, or other
  • Ongoing communication before and after workshop
  • International workshops: translators helpful

Print-outs for Data Workshop

These may be printed or, in some cases, accessed on participant computers. Please consult with the facilitator before deciding what to print.

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