Higgs production at the lHC
Abstract
We analyze the production of Higgs particles at the early stage of the CERN large Hadron Collider with a 7 TeV center of mass energy (lHC). We first consider the case of the Standard Model Higgs boson that is mainly produced in the gluongluon fusion channel and to be detected in its decays into electroweak gauge bosons, gg → H → WW, ZZ, γγ. The production cross sections at sqrt {s} = 7{{TeV}} and the decay branching ratios, including all relevant higher order QCD and electroweak corrections, are evaluated. An emphasis is put on the various theoretical uncertainties that affect the production rates: the significant uncertainties from scale variation and from the parametrization of the parton distribution functions as well as the uncertainties which arise due to the use of an effective field theory in the calculation of the nexttonexttoleading order corrections. The parametric uncertainties stemming from the values of the strong coupling constant and the heavy quark masses in the Higgs decay branching ratios, which turn out to be nonnegligible, are also discussed. The implications for different center of mass energies of the proton collider, sqrt {s} = 8  10{{TeV}} as well as for the design energy sqrt {s} = 14{{TeV}} , are briefly summarized. We then discuss the production of the neutral Higgs particles of the Minimal Supersymmetric extension of the Standard Model in the two main channels: gluongluon and bottom quark fusion leading to Higgs bosons which subsequently decay into tau lepton or bquark pairs, gg,bbar{b} to {{Higgs}} to {tau^{+} }{tau^{} },bbar{b} . The Higgs production cross sections at the lHC and the decay branching ratios are analyzed. The associated theoretical uncertainties are found to be rather large and will have a significant impact on the parameter space of the model that can be probed.
 Publication:

Journal of High Energy Physics
 Pub Date:
 March 2011
 DOI:
 10.1007/JHEP03(2011)055
 arXiv:
 arXiv:1012.0530
 Bibcode:
 2011JHEP...03..055B
 Keywords:

 Higgs Physics;
 Supersymmetric Standard Model;
 Hadronic Colliders;
 Standard Model;
 High Energy Physics  Phenomenology;
 High Energy Physics  Experiment
 EPrint:
 49 pages, 19 figures, 9 tables. Addendum included compared to published version with updated results at a c.m. energy of 8 TeV