CMS Masterclass 2012.

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Presentation transcript:

CMS Masterclass 2012

W and Z Particles Looking for the mediators of the weak interaction: electrically charged W + boson, the negative W - boson, the neutral Z boson.

W and Z Decays W and Z travel only a tiny distance before decaying, so CMS does not “see” W or Z bosons directly. CMS can detect electrons muons CMS can infer neutrinos from “missing energy”

iSpy-online

Can we distinguish W from Z candidates? The Task Use new data from the LHC in iSpy to test CMS performance. Can we distinguish W from Z candidates?

Can we calculate the e/m rati0? The Task Can we calculate the e/m rati0?

Can we calculate a W+/W- ratio for CMS? The Task Can we calculate a W+/W- ratio for CMS?

Can we make mass plot of Z candidates? The Task Can we make mass plot of Z candidates?

Try Real Events Open iSpy-online with: Firefox ver 5 or greater Chrome Safari Open iSpy-dvd with: - Firefox ver 7 or greater

Recording Event Data

Recording Event Data

Upload Institute Results Combination of Results pages linked from http://physicsmasterclasses.org

Upload Institute Results

Masterclass Results Make mass plot for all Institutes Optional scatter plot (example):