Presentation of results
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Presentation of resultsPresentation of results
March 20th 2013 Masterclass 2013 Masterclass 2013
Padova (ITA) Institute
March 20th 2013
CMS exercise
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We did …We did …
March 20th 2013 Masterclass 2013 Masterclass 2013
We have two columns in xls file: electron and muon
Lepton ID with detectors
Charge determination
GOAL is particle ID through leptonic decays
Questions: Which detector did you look?
How did you measure the particle charge?
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We did …We did …
March 20th 2013 Masterclass 2013 Masterclass 2013
We have three columns in xls file: +, -, not known
Question: Which quantities are conserved?
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We did …We did …
March 20th 2013 Masterclass 2013 Masterclass 2013
We have three columns in xls file: Z, ZZ, mass
Question: Describe the ZZ decays with only charged leptons.
Finally, we have the column called zoo: … …
Question: What is it?
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Padova results: numbersPadova results: numbers
March 20th 2013 Masterclass 2013 Masterclass 2013
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Padova results: ratiosPadova results: ratios
March 20th 2013 Masterclass 2013 Masterclass 2013
Ratio e/μRatio W+/W-
Expected value [ratio e/μ] = 1.0Expected value [ratio W+/W-] = 1.4
Measure [ratio e/μ] = (1.05 ± 0.06) Measure [ratio W+/W-] = (1.31 ± 0.09)
Question: Why the ratio e/μ is 1.0?
Question: Why is W+ more frequent than W-?
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Lione results: mass plotLione results: mass plot
March 20th 2013 Masterclass 2013 Masterclass 2013
Massplot Lione (March 18 th)
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Torino results: mass plotTorino results: mass plot
March 20th 2013 Masterclass 2013 Masterclass 2013
Massplot Torino (March 18 th)
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Padova results: Z mass plotPadova results: Z mass plot
March 20th 2013 Masterclass 2013 Masterclass 2013
Massplot Padova (March 20 th)
MZZ ≈ 126 GeVHiggs candidates
From Particle Data Group Mass (Z) = (91.1876 ± 0.0021) GeV
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Padova results: Z mass plotPadova results: Z mass plot
March 20th 2013 Masterclass 2013 Masterclass 2013
Massplot Padova (March 20 th)
MZZ ≈ 126 GeVHiggs candidates
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Padova results: Higgs candidatesPadova results: Higgs candidates
March 20th 2013 Masterclass 2013 Masterclass 2013
Your Higgs candidate
CMS official Higgs candidate
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Masterclass linksMasterclass links
March 20th 2013 Masterclass 2013 Masterclass 2013
Pagina masterclasshttp://www.pd.infn.it/masterclasses/2013/
Risultati globalihttp://www.editgrid.com/qn-nd/qnmasterclasses/CMSWZ2013cern20003
Scaricare il DVD (MC2013 per accedere)
http://www.physicsmasterclasses.org/downloads/DVD2013/dvd.html
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VideoconferenceVideoconference
March 20th 2013 Masterclass 2013 Masterclass 2013
Padova (Italia)
Zagabria (Croazia)
Budapest (Ungheria)
Lione (Francia)
Dublino (Irlanda)
Possible questions to be asked
•Life @ CERN
•Motivation to do physics
•Higgs bosons
•Other searches + QUIZ