Probing non-standard $b\bar{b}h$ interaction at the LHC at $\sqrt{s}=13$ TeV

Abstract

In the detailed probe of Higgs boson properties at the Large Hadron Collider, and in looking for new physics signatures in the electroweak symmetry breaking sector, the bottom quark Yukawa coupling has a crucial role. We investigate possible departure from the standard model value of $b\bar{b}h$ coupling, phenomenologically expressed in terms of a modification factor ${\alpha }_b$, in $b\bar{b}$-associated production of the $125$-GeV scalar at the high-luminosity LHC. In a next-to-leading order estimate, we make use of a gradient boosting algorithm to improve in statistical significance upon a cut-based analysis. It is found possible to probe down to ${\alpha }_b=3$ with more than $5\sigma$ significance, with $\mathcal{L}=3000$ fb${}^{-1}$ and $\sqrt{s}$ = 13 TeV, while the achievable limit at $95\%$ C.L. is $\pm 1.95$.

13 pages, 5 figures, 3 tables

References in corpus (10)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Parton distributions for the LHC
• Higgs production in association with bottom quarks
• Higgs production in bottom quark fusion: Matching the 4- and 5-flavour schemes to third order in the strong coupling
• Higgs Boson Production in Association with Bottom Quarks
• RIP $Hb\bar{b}$: How other Higgs production modes conspire to kill a rare signal at the LHC
• Determining the space-time structure of bottom-quark couplings to spin-zero particles

Cited by in corpus (5)

• Two-loop leading-colour QCD helicity amplitudes for Higgs boson production in association with a bottom-quark pair at the LHC
• Full-colour double-virtual amplitudes for associated production of a Higgs boson with a bottom-quark pair at the LHC
• Broad toplike vector quarks at LHC and HL-LHC
• Searching exotic Higgs bosons at the LHC
• Prospect study for measurement of $Hb\bar{b}$ coupling at the LHC and FCC-hh