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

Partha Konar; Biswarup Mukhopadhyaya; Rafiqul Rahaman; Ritesh K. Singh

doi:10.1016/j.physletb.2021.136358

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arXiv · 2101.10683

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

Partha Konar·Biswarup Mukhopadhyaya·Rafiqul Rahaman·Ritesh K. Singh

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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 $α_b$, 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 $α_b = 3$ with more than $5~σ$ significance, with ${\cal L} = 3000$ fb$^{-1}$ and $\sqrt{s}$ = 13 TeV, while the achievable limit at $95\%$ C.L. is $\pm 1.95$.

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Partha Konar, Biswarup Mukhopadhyaya, Rafiqul Rahaman, Ritesh K. Singh. 2021-01-26. Probing non-standard $b\bar{b}h$ interaction at the LHC at $\sqrt{s}=13$ TeV. https://doi.org/10.1016/j.physletb.2021.136358

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