Changes between Initial Version and Version 1 of Frascati

Timestamp:

Mar 20, 2012, 4:16:06 PM (12 years ago)

Author:

trac

Comment:

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Frascati

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+== QCD at the LHC, Frascati 2010 ==
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+Two lectures are given on QCD at the LHC.
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+   1. Accurate QCD : Fixed order calculations from LO to NNLO
+   1. Useful QCD : Parton Showers
+   1. Best QCD : Merging FO calculations with PS at LO and NLO.
+
+The PDF of the lectures can be found [attachment:maltoni-frascati-2010.pdf here].
+
+The examples and exercises are related to physics at the LHC.
+=== Basic aspects of QCD ===
+===== Various Tests and exercises =====
+
+A collection of test, exercises, and web applications on pQCD can be found in [attachment:QCD-exercises.pdf QCD-exercises.pdf].
+
+===== Exercise on recursive relations =====
+
+Think about the computation of q \bar q + n \gamma in a recursive way, by trying not calculate the same quantities twice. Show that the complexity of the calculation goes from n! (factorial) to 2^{n-1} (exponential) .
+=== Going NLO ===
+
+   1. pp>H at LO (1-loop): details of the calculation (Mathematica Notebook) [attachment:HiggsGG-LO-mtfinite.nb HiggsGG-LO-mtfinite.nb]
+   1. pp>H at NLO: details of the calculation (Mathematica Notebook) [attachment:HiggsGG-NLO.nb higgsGG-NLO.nb]
+   1. pp>H at NLO: cross section evaluation for the LHC (Mathematica Notebook+PDF libraries to be compiled) [attachment:phenHiggs.tar.gz phenHiggs.tar.gz].
+
+A summary of the results can be found in [attachment:Higgs.pdf Higgs.pdf].
+
+=== Selected exercises on QCD that can be solved with a Matrix Element generator. ===
+
+   * [:DeadCone:Radiation from heavy quarks]: the dead cone in %$e^+e^- \to Q \bar Q g$%.
+   * [:GluonSpin:Spin of the gluon]: Vector vs scalar in the angular correlations of %$ e^+ e^- \to$% 4 jets.
+   * [:2Jets:Jets] : Di-jet kinematics and rates in pp collisions.
+   * [:3Jets:3 Jets] : Energy distributions in 3-jet events in pp collisions.
+   * [:tt:top production] : %$t \bar t$% production, Tevatron vs LHC.
+   * [:WAsymm:Drell-Yan]: rapidity asymmetry at the Tevatron and LHC.
+   * [:TopDecaySpinCorrelations: Spin correlations in top decay], by [http://www.hep.phy.cam.ac.uk/theory/webber/ Bryan Webber].
+
+=== Monte Carlo integration ===
+
+A short introduction to the techniques of Monte Carlo integration. Exercises proposed during lecture are collected in this Mathematica Notebook: [attachment:mc101.nb mc101.nb].
+
+=== LHC Phenomenology ===
+
+   * [:DiscoverTheHiggs:SM Higgs discovery at the LHC]: Three important channels
+   * [:WarmingUpChallenge:Simple Black Boxes]: New gauge bosons
+
+=== How to familiarize with Software.MadGraph ===
+
+All exercises proposed can be "solved" or checked with Software.MadGraph / Software.MadEvent. Here is how to familiarize with the code.
+
+   * Logon to the Software.MadGraph web site and register.
+
+   * Familiarize with the code by generating a few processes in QED and QCD trying to guess which diagrams appear. What is the minimum number of jets have to be asked for in %$e^+e^-$% collisions so that the triple gauge vertex appear?
+
+   * Look at the new physics models and check the particle and interactions content.
+
+   * Generate events for a few selected processes and look at the plots: 
+      * ttbar production with decays: pp>tt~>bb~mu+e-ve~vm
+      * VV production: pp>VV> leptons, with V=Z,W.
+      * Single top + Higgs: pp>tHj (QCD=0, QED=3, j=gudsc,p=gudscb). Show that there is a large negative interference between the diagrams
+
+-- Main.FabioMaltoni - 05 May 2010
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