This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision | ||
2015:groups:higgs:morehiggs:lowmassdiphoton [2015/06/16 11:49] david.sabes |
2015:groups:higgs:morehiggs:lowmassdiphoton [2015/06/18 15:43] (current) camilo.carrillo |
||
---|---|---|---|
Line 1: | Line 1: | ||
+ | ====== Low Mass Higgs -> gamma gamma ====== | ||
+ | |||
{{2015:groups:higgs:morehiggs:selection_538.png|The logo of DokuWiki}} | {{2015:groups:higgs:morehiggs:selection_538.png|The logo of DokuWiki}} | ||
Line 55: | Line 57: | ||
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$complete path$/pythia8209/lib | export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$complete path$/pythia8209/lib | ||
make HAS_PYTHIA8=true DelphesPythia8 | make HAS_PYTHIA8=true DelphesPythia8 | ||
+ | |||
+ | Build your pythia card, this is an example for H->gg, note that the input lhe file is defined here | ||
+ | Main:numberOfEvents = 100000 | ||
+ | Beams:frameType = 4 | ||
+ | Beams:LHEF = /home/miloc/lhe/h125SM.lhe | ||
+ | 25:onMode = off | ||
+ | 25:onIfMatch = 22 22 | ||
+ | |||
+ | | ||
Finally to run Delphes, do | Finally to run Delphes, do | ||
Line 112: | Line 123: | ||
We have 3 theoretical models (frameworks) where our final state is applicable: | We have 3 theoretical models (frameworks) where our final state is applicable: | ||
- | Theory 1: Werner | + | ====Theory 1==== |
- | Theory 2: Ulrich | + | Werner: in the NMSSM the lightest neutralinos/chargino can be mainly the MSSM higgsinos. |
+ | In case of a large singlet-doublet couplings, one gets sizable cross section for | ||
+ | pp -> chi chi H_1. Here chi chi is the summation over all higgsinos which are mass degenerate within a few | ||
+ | GeV. | ||
- | Theroy 3: Giacommo and Aldo | + | The second interesting process ist pp -> H_3 -> H_1 H_1 where the H_3 is the heaviest neutral Higgs boson. |
- | Experimental ATLAS: Nicolas | + | The third is pp -> t t -> W b H+ b where H+ decays into W H_1 and the later to gamma gamma. |
- | Experimental CMS: Camilo Benoit David | + | ====Theory 2==== |
+ | Ulrich: | ||
+ | {{:2015:groups:higgs:morehiggs:benchmark_point_b1_nmssm_from_arxiiv.jpg|}} | ||
+ | |||
+ | ====Theory 3==== | ||
+ | |||
+ | Giacomo and Aldo | ||
+ | |||
+ | The model consists of a scalar which is pair produced by gauge interactions: qq -> H' H', and VBF -> H' H'. At low mass, the kinematically allowed decays are: W gamma (charged) and gamma gamma (neutral). | ||
+ | We can start considering a triplet of SU(2)L, with production channels H'+ H'-, and H'+ H'0. We will create a MG file asap. | ||
+ | |||
+ | A sample model, with a singlet decaying in VV (but not gamma gamma): [[http://arxiv.org/abs/1502.04718|1502.04718]]. More references to follow soon. | ||
+ | |||
+ | |||
+ | ====Experiment==== | ||
+ | ATLAS: Nicolas | ||
+ | |||
+ | CMS: Camilo Benoit David | ||
We are implementing a reliable model of CMS in DELPHES, the input of our software would be lhe files, the decay of the higgs can be done by us as well.... work is ongoing. | We are implementing a reliable model of CMS in DELPHES, the input of our software would be lhe files, the decay of the higgs can be done by us as well.... work is ongoing. | ||
Line 129: | Line 160: | ||
=== Meeting 3: Wednesday 17th at 14:30 === | === Meeting 3: Wednesday 17th at 14:30 === | ||
Preparation of the summary slides, based on your inputs in this twiki | Preparation of the summary slides, based on your inputs in this twiki | ||
+ | Presentation draft: | ||
+ | http://test-carrillo.web.cern.ch/test-carrillo/tmp/lhe.pdf | ||
+ |