Changes between Initial Version and Version 1 of X

Timestamp:

Mar 20, 2012, 4:17:13 PM (13 years ago)

Author:

trac

Comment:

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X

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+=== Discover New gauge bosons at the LHC ===
+
+Three "black boxes" are given, in the form of event files in the LHC Olympics format and a series of selected plots:
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+
+   * Box A : [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/A.lhco.gz Events]  Plots:  [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/A.pdf Detector level]   ([http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/A-lhe.pdf Parton level]) 
+   * Box B : [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/B.lhco.gz Events]   Plots:  [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/B.pdf Detector level]   ([http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/B-lhe.pdf Parton level])  
+   * Box C : [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/C.lhco.gz Events]  Plots:  [http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/C.pdf Detector level]   ([http://cp3wks05.fynu.ucl.ac.be/twiki/pub/Physics/DiscoverTheHiggs/C-lhe.pdf Parton level]) 
+
+Black boxes contain only signal events. The students are asked to pair up the boxes above with the following models and also answer to the questions:
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+   * Model 1 : Extra Z (zp) : What its mass? Does it have Standard Model couplings to fermions? 
+   * Model 2 : Heavy Scalar (h): What its mass?  Is it a SM Higgs?
+   * Model 3 : Extra W (wp+ or wp-) : What its mass? Does it have Standard Model couplings to fermions? 
+ 
+Useful extra information:
+   * In the plots %$H_T=\sum ||p_T^{vis}|| + E_T^{miss}$%.
+   * A SM-like  Z' would decay (more or less democratically) into: jet jet (uu~,cc~,dd~,ss~,bb~), t tbar (tt~), lept+lept- (e+e-,mu+mu-,ta+ta-), neutrino anti-neutrino (ve ve~,vm vm~,vt vt~). It could also have couplings to SM W and Z, and in that case would decay in to ZZ and W+W-.
+   * An Higgs couple to particles with a strength which is proportional to the particle masses. A SM-like  heavy H would decay in to t tbar (tt~), W+W-, ZZ.   
+   * A SM-like  W'+ would decay into: jet jet (ud~,cs~), t b (tb~), lept neutrino (e+ ve , mu+ vm, ta+ vt). It could also have couplings to SM W and Z, and in that case would decay in to ZW.
+
+
+
+-- Main.FabioMaltoni - 28 Aug 2008
+
+