2017:groups:tools:vbs
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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 |
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| ===== 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
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