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Resonant heavy Higgs searches at the HL-LHC

Adhikary, Amit and Banerjee, Shankha and Barman, Rahool Kumar and Bhattacherjee, Biplob (2019) Resonant heavy Higgs searches at the HL-LHC. In: JOURNAL OF HIGH ENERGY PHYSICS (9).

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Official URL: https://dx.doi.org/10.1007/JHEP09(2019)068


In this work, we show the importance of searches for heavy resonant scalars (H) and pseudoscalars (A). Taking cue from the present searches, we make projections for searches in an extended scalar sector at the high luminosity run of the Large Hadron Collider. We study the three most relevant search channels, i.e., H -> hh, H/A t (t) over bar and b (b) over barH/A. Upon studying multifarious final states for the resonant double Higgs production, we find that the b (b) over bar gamma gamma (sigma(pp -> H -> hh) is an element of 81.27, 14.45] fb for m(H) is an element of 300, 600] GeV at 95% C.L.) and b (b) over barb (b) over bar (5.4, 2.5] fb for m(H) is an element of 800, 1000] GeV at 95% C.L.) channels are the most constraining. For the b (b) over barH channel, we can exclude sigma(pp -> b (b) over barH) is an element of 22.2, 3.7] fb for m(H) is an element of 300, 500] GeV. Finally, we consider the phenomenological Minimal Supersymmetric Standard Model as an example and impose various present constraints and our future direct search-limits and obtain strong constraints on the m(A) - tan beta parameter space, where m(A) and tan beta are respectively the mass of the pseudoscalar and the ratio of the vacuum expectation values of the two Higgs doublets. Assuming that the heavy Higgs boson decays only to Standard Model (SM) states, we find that the H -> hh -> b (b) over bar gamma gamma (H -> t (t) over bar) channel excludes tan beta as low as 4 (m(A)is an element of 400, 800] GeV) at 95% CL. This weakens up to similar to 5.5 when the b (b) over barH channel dominates. Upon allowing for non-SM decay modes, the limits weaken.

Item Type: Journal Article
Publisher: SPRINGER
Additional Information: Copyright of this article belongs to SPRINGER
Keywords: Beyond Standard Model; Higgs Physics; Supersymmetric Standard Model
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 31 Dec 2019 09:24
Last Modified: 31 Dec 2019 09:24
URI: http://eprints.iisc.ac.in/id/eprint/63855

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