Joint analysis of Higgs decays and electroweak precision observables in the Standard Model with a sequential fourth generation

Details Joint analysis of Higgs decays and electroweak precision observables in the Standard Model with a sequential fourth generation Joint analysis of Higgs decays and electroweak precision observables in the Standard Model with a sequential fourth generation

2012-04-17

arxiv.org/abs/1204.3872v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

We analyse the impact of LHC and Tevatron Higgs data on the viability of the Standard Model with a sequential fourth generation (SM4), assuming Dirac neutrinos and a Higgs mass of 125 GeV. To this end we perform a combined fit to the signal cross sections of pp -> H -> gamma gamma,ZZ*,WW* at the LHC, to p pbar -> VH -> V b bbar (V = W, Z) at the Tevatron and to the electroweak precision observables. Fixing the mass of the fourth generation down-type quark b' to 600 GeV we find best-fit values of m_t' = 634 GeV, m_l4 = 107.6 GeV and m_nu4 = 57.8 GeV for the other fourth-generation fermion masses. We compare the chi-square values and pulls of the different observables in the three and four-generation case and show that the data is better described by the three-generation Standard Model. We also investigate the effects of mixing between the third and fourth-generation quarks and of a future increased lower bound on the fourth-generation charged lepton mass of 250 GeV.

Affiliated with

Also associated with

No associations

Rating

Joint analysis of Higgs decays and electroweak precision observables in the Standard Model with a sequential fourth generation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Joint analysis of Higgs decays and electroweak precision observables in the Standard Model with a sequential fourth generation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Joint analysis of Higgs decays and electroweak precision observables in the Standard Model with a sequential fourth generation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-290634