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arXiv · 2405.02667

Prospect study for measurement of $Hb\bar{b}$ coupling at the LHC and FCC-hh

Zahra Abdy·Mojtaba Mohammadi Najafabadi
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Abstract

This paper employs the $H+b+\text{jets}$ signature in proton-proton collisions to explore the structure of the $Hb\bar{b}$ couplings.The focus of the analysis lies in the decay of the Higgs boson into a photon pair, taking into account both reducible and irreducible backgrounds and a realistic simulation of the detector effects. To enhance the discrimination between signal and background, a multivariate analysis is employed to analyse the kinematic variables and optimise the signal-to-background ratio. The results indicate that the $H+b+\text{jets}$ process can significantly contribute to the precise measurement of CP-even and CP-odd couplings between the bottom quark and the Higgs boson at the LHC and FCC-hh. Finally, a novel asymmetry is introduced for the purpose of probing CP violation within the $Hb\bar{b}$ coupling, formulated exclusively based on lab-frame momenta.

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Zahra Abdy, Mojtaba Mohammadi Najafabadi. 2024-05-04. Prospect study for measurement of $Hb\bar{b}$ coupling at the LHC and FCC-hh. https://doi.org/10.1103/physrevd.109.093003

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