Searching for Higgs decays to four bottom quarks at LHCb

Abstract

We discuss the feasibility of seeing a Higgs boson which decays to four bottom quarks through a pair of (pseudo-)scalars at the LHCb experiment to argue that the use of b-physics triggers and off-line vertex reconstruction, as opposed to jet triggers with b tagging, may be more effective for this signal. Focusing on inclusive production for the Higgs, we find that for light scalar masses below 20 GeV, signal reconstruction efficiencies of order a few percent may be enough for LHCb to find evidence for a Higgs with a dominant 4b decay channel.Comment: 6 pages, 2 figure

QCD at the FCC-ee

“…Besides these partial decay widths, the simulation of Higgs decays at the differential level is paramount either to correct for experimental fiducial acceptances or for the study of differential distributions for angular observables and jet observables measured on the Higgs decays, which are sensitive to quark Yukawa couplings [188,189] or new physics states (see e.g. [190][191][192][193][194]). The future development of heavy and light jet tagging and quark/gluon jet discrimination techniques can be exploited to gain sensitivity to Yukawa couplings to light quarks.…”

Hadronic decays of Higgs boson at NNLO matched with parton shower

“…For instance the full kinematic and flavor information in hadronic decays will be crucial for correcting for experimental efficiencies [17], especially in the case where the accompanied Z boson also decays hadronically [9,18]. Besides, there are also strong motivations for study of exclusive hadronic decays to test Yukawa coupling of light quarks [19], and to search for possible CP violations in Yukawa couplings [20] or exotic states beyond the SM [21][22][23][24][25]. The fully differential cross sections for H → bb have been calculated to next-to-next-to-leading order (NNLO) in [26,27] and N 3 LO in [28] for massless bottom quarks, and to NNLO in [29][30][31][32] with massive bottom quarks.…”

Higgs boson decay into four bottom quarks in the SM and beyond

“…Besides, multi-jets final state, for instance, Higgs boson decays into three or four QCD partons can also be explored at future Higgs factory. There have been strong motivations for experimental searches of those exclusive hadronic decay channels to look for exotic decays of the Higgs boson induced by light states beyond the SM [34][35][36]. Among them there is the decay of the Higgs boson to four bottom quarks which will be the main focus of this paper.…”