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2017:groups:tools:vbs [2017/06/09 12:17]
vitaliano.ciulli created
2017:groups:tools:vbs [2017/07/03 11:04] (current)
mathieu.pellen
Line 1: Line 1:
 ===== Dibosons VBS production ===== ===== Dibosons VBS production =====
  
-Interested people: Vitaliano, Kenneth,...+**Interested people**: Vitaliano, Kenneth, ​Efe, Simon, Carlo, Reina Camacho, Mathieu, Marco, ​ Michael...ADD YOUR NAME HERE...
  
-Aims:  +A discussion is scheduled on Monday afternoon. 
-- review available MC tools +   * Kenneth will discuss ​theory issues ​in dibosons ewk analyses in CMS 
-discuss ​QCD and EW NLO corrections  +   * Simon will discuss possible studies to be done as a Les Houches project
-- define signal and background processes both in the signal and control regions, where VBS cuts are relaxed and interference effects become large +
-- ... +
  
 +Proposed study: ​
 +   * assess off-shell and interference effects at LO (without PS) for different value of \Delta\eta_jj and m_jj cut 
 +   * define "​signal"​ (VBS topology) vs "​background"​ (QCD-like topology) based on the results of the above study
 +   * from the above also assess to which precision VBS-like approximation for NLO calculation is reliable (the same effects are those neglected in this approximation) ​
 +   * study if by taking the ratio of xsec for "​signal"​ to "​background"​ regions some theory uncertainties on QCD VVjj production cancel out
 +   * [(maybe) check the effect of VBS WW as background to H->WW]
  
 +Processes to be studied:
  
 +   * pp -> jj W⁺Z:
 +   48 processes and 976 diagrams
 +   * pp -> jj W⁺W⁻:
 +   76 processes and 1432 diagrams
  
 +So pp -> jj W⁺Z will be studied first and if enough time, pp -> jj W⁺W⁻ afterwards.
 +--> pp -> jj \mu⁺ \mu⁻ e⁺ \nu_e
 +with p = u u~ d d~ c c~ s s~
 +with j = u u~ d d~ c c~ s s~
 +
 +The convener of the group is Kenneth.
 +Unless someone wants to be the convener.
 +Any objections?
 +
 +Definition of the cuts (apart from \Delta\eta_jj and m_jj)?
 +
 +Input parameters?
2017/groups/tools/vbs.1497003433.txt.gz · Last modified: 2017/06/09 12:17 by vitaliano.ciulli