Journal
PHYSICAL REVIEW D
Volume 89, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.89.073020
Keywords
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Funding
- IPPP Associateship program
- Science and Technology Facilities Council [ST/L000466/1] Funding Source: researchfish
- STFC [ST/L000466/1] Funding Source: UKRI
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After the discovery of the 125 GeV scalar boson with gauge properties similar to the Standard Model (SM) Higgs, the search for beyond the SM interactions will focus on studying the discovered particles' coupling properties more precisely and shedding light on the relation of fermion masses with the electroweak vacuum. The large mass of the top quark and the SM-predicted order one top Yukawa coupling is a natural candidate for beyond the SM physics, though experimentally challenging to constrain. In this paper, we argue that investigating angular correlations in pp -> tHj production provides an excellent handle to constrain the top Yukawa coupling y(t) via direct measurements, even when we focus on rare exclusive final states. We perform a hadron-level analysis and show that we may expect to constrain yt greater than or similar to 0.5y(t)(SM) at 95%-99% confidence level at the high luminosity LHC using semileptonic top decays and H -> gamma gamma alone, by employing a two-channel measurement approach.
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