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@CSI&ND2013: Event Analysis Training
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!
Is it a W+, W-, Z, or Higgs? |
Is it a W+, W-, Z, or Higgs? |
Is it a W+, W-, Z, or Higgs? |
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 Masterclass and Particle Physics Outreach
Resources for ICNFP2013Organizational
Educational
Download Contact |
Tiny URL for this page: http://tinyurl.com/l32hyws.
|
CMS Data Express
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
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
AAPT Summer Meeting 2013 Session AF
Links:
- QuarkNet, /
- International Masterclasses, http://www.physicsmasterclasses.org
- QuarkNet e-Labs, http://www.i2u2.org/elab
- Particle Physics and More wiki, https://sites.google.com/site/306physics/home
- Sheldon learns to swim, http://www.youtube.com/watch?v=MnKoQbFXemE
Downloads:
- Exploring Elementary Particles with masterclasses and e-Labs (presentation)
- Reaching Modern Physics in an Inquiry-Based Physics First Curriculum (presentation)
- Students videoconference to compare their LHC particle event analysis (presentation)
- Acitvities from QuarkNet's Data Portfolio (presentation)
- Using the CMS e-Lab with High School Students (presentation)
- Plotting LHC Discovery (activity)
Contacts:
- Ken Cecire (session chair)
- QuarkNet staff
Data Workshop and CMS e-Lab Workshop pre-flight
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
These may be printed or, in some cases, accessed on participant computers. Please consult with the facilitator before deciding what to print.
- Quark Puzzle (one per 5-10 participants with puzzle pieces cut)
- Z Mass events or Top Quark events (one event per 2 participants)
- ATLAS or CMS Data Express events (at least one full set)
- ATLAS or CMS masterclass cheat sheets (one per two participants)
- Protractor (in case someone needs it)
- Ruler (in case someone needs it)
LHC Data Workshop at AAPT
13 June 2013
Welcome to the LHC Data Workshop at the AAPT Summer 2013 Meeting. We will focus on the ATLAS detector in the Large Hadron Collider at CERN. This workshop is organized by the QuarkNet collaboration.
Agenda08:00 Coffee and Registration 08:30 ATLAS overview 09:00 ATLAS Virtual Visit 10:00 Activity 1: Rolling with Rutherford (spreadsheet) 11:00 Activity 2: Mass Calc: Z 12:00 lunch 13:00 ATLAS Z masterclass measurement (OPloT) 15:00 Discussion of results 15:30 Activity 3: Plotting LHC Discovery 16:30 Evaluation and final discussion 17:00 End of day |
ObjectivesParticipating teachers are enabled to:
Resources
|
CMS Data Express e-Lab Edition
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 e-Lab Edition is specifically for use with the CMS e-Lab. Participants examine static displays of a limited number of events. The main goal is to separate Z candidate events other events by visual inspection and then create 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.
Instructions
Individual or pair:
- Participate in analysis prep seminar
- Open the event display file
- Go to set of events assigned
- Determine whether each event is a Z candidate (2 distinct muon tracks)
- If the event is a Z candidate, note the mass, round to nearest odd number, record
- When finished, count how many instances of each odd number you have recorded
Group:
- Combine numbers of "odd masses" in all groups. (Download xls.)
- Create a histogram for whole group to observe.
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.
Resources
ATLAS and CMS Data Workshops Preflight
Lead Teachers and Mentors should prepare the following for a CMS or ATLAS Data Workshop:
Materials
- Name tags and markers/pens
- Workshop evaluation forms - print one for each teacher
- Rolling with Rutherford: Marbles or balls, flat even space, ruler(s) or meter stick(s), optional targets
- Printed events, protractors, scientific calculators for Z Mass or Top Mass activities
- Other activity printouts (see agenda)
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 two participants with good internet connection
- Projector and screen
- Webcam/mic/speakers or H.323 (Polycom or equivalent) for videoconference
- Black/white board & markers
- Access to a printer
Human
- Mentor presence
- Physicist to speak on CMS, ATLAS, or LHC; suggestions:
- include a bit about standard model
- introduce CERN, LHC, and CMS or ATLAS
- say a bit about speaker's research
- keep it simple and at a very general level - know the audience
- Ongoing communication before and after workshop
- International workshops: translators helpful