1 / 14

Using CalcHEP package to study Higgs boson decay

Using CalcHEP package to study Higgs boson decay. By Hosam M.Abd Elazeem B.Sc, Beni-Sueif University. Some features of CalcHEP package. Any process within any model: decay and scattering. Tree-level processes.

bautistam
Télécharger la présentation

Using CalcHEP package to study Higgs boson decay

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Using CalcHEP package to study Higgs boson decay By Hosam M.Abd Elazeem B.Sc, Beni-Sueif University

  2. Some features of CalcHEP package • Any process within any model: decay and scattering. • Tree-level processes. • Squared matrix element calculation but with no spin information for outgoing particles – spin averaged amplitude • Very quick for 2-2 production or width calculations • Straightforward to enter new models, CalcHEP and related CompHEP used as core for several other programs.

  3. Limitations of CalcHEP package • Limit on number of external legs (involved particles) and number of diagrams official limit – 6 ,, unofficial – none • limit set from the practical point: 2 -> 6 (1->7) : is the essential time limit • number of diagrams ~ 100-200: time and disk-space limit

  4. The Decay Modes of the Higgs Boson The possible decay modes of the Higgs boson are essentially determined by the value of its mass. • When the Higgs boson mass lies in the range 95 Gev< Mh<130Gev , the Higgs is quite narrow Γh<10 MeV and the main branching ratios come from the heaviest fermions that are accessible kinematically (b,B), followed by (l,L), then (c,C )

  5. The Decay Modes of the Higgs Boson • For a heavier Higgs, i.e. Mh>130 GeV, the vector boson channels h VV* with V=W,Z are dominant. • Finally, for the total decay width, the Higgs boson is very narrow in the low mass range, Γh< 10 MeV, but the width becomes rapidly wider for masses larger than 130 GeV, reaching ∼ 1 GeV slightly above the ZZ threshold.

  6. THANK YOU

More Related