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Quantum interference among heavy NMSSM Higgs bosons

Quantum interference among heavy NMSSM Higgs bosons
Quantum interference among heavy NMSSM Higgs bosons

In the next-to-minimal supersymmetric standard model (NMSSM), it is possible to have strong mass degeneracies between the new singletlike scalar and the heavy doubletlike scalar, as well as between the singletlike and doubletlike pseudoscalar Higgs states. When the difference in the masses of such states is comparable with the sum of their widths, the quantum mechanical interference between their propagators can become significant. We study these effects by taking into account the full Higgs boson propagator matrix in the calculation of the production process of τ+τ- pairs in gluon fusion at the Large Hadron Collider (LHC). We find that, while these interference effects are sizeable, they are not resolvable in terms of the distributions of differential cross sections, owing to the poor detector resolution of the τ+τ- invariant mass. They are, however, identifiable via the inclusive cross sections, which are subject to significant variations with respect to the standard approaches, wherein the propagating Higgs bosons are treated independently from one another. We quantify these effects for several representative benchmark points, extracted from a large set of points, obtained by numerical scanning of the NMSSM parameter space, that satisfy the most important experimental constraints currently available.

2470-0010
1-13
Das, Biswaranjan
94f55af2-f7e1-4853-b746-66bd93ca88e7
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Munir, Shoaib
9e440f1d-64a4-4f6c-9b55-6c13bb544dcd
Poulose, Poulose
10a21624-1742-4156-9c68-577565b637d9
Das, Biswaranjan
94f55af2-f7e1-4853-b746-66bd93ca88e7
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Munir, Shoaib
9e440f1d-64a4-4f6c-9b55-6c13bb544dcd
Poulose, Poulose
10a21624-1742-4156-9c68-577565b637d9

Das, Biswaranjan, Moretti, Stefano, Munir, Shoaib and Poulose, Poulose (2018) Quantum interference among heavy NMSSM Higgs bosons. Physical Review D, 98 (5), 1-13, [055020]. (doi:10.1103/PhysRevD.98.055020).

Record type: Article

Abstract

In the next-to-minimal supersymmetric standard model (NMSSM), it is possible to have strong mass degeneracies between the new singletlike scalar and the heavy doubletlike scalar, as well as between the singletlike and doubletlike pseudoscalar Higgs states. When the difference in the masses of such states is comparable with the sum of their widths, the quantum mechanical interference between their propagators can become significant. We study these effects by taking into account the full Higgs boson propagator matrix in the calculation of the production process of τ+τ- pairs in gluon fusion at the Large Hadron Collider (LHC). We find that, while these interference effects are sizeable, they are not resolvable in terms of the distributions of differential cross sections, owing to the poor detector resolution of the τ+τ- invariant mass. They are, however, identifiable via the inclusive cross sections, which are subject to significant variations with respect to the standard approaches, wherein the propagating Higgs bosons are treated independently from one another. We quantify these effects for several representative benchmark points, extracted from a large set of points, obtained by numerical scanning of the NMSSM parameter space, that satisfy the most important experimental constraints currently available.

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PhysRevD.98.055020 - Version of Record
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e-pub ahead of print date: 17 September 2018
Published date: 17 September 2018

Identifiers

Local EPrints ID: 425534
URI: http://eprints.soton.ac.uk/id/eprint/425534
ISSN: 2470-0010
PURE UUID: 06cd860d-73cb-4338-bdd0-513c26f36430

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Date deposited: 24 Oct 2018 16:30
Last modified: 19 Jul 2019 16:54

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Contributors

Author: Biswaranjan Das
Author: Stefano Moretti
Author: Shoaib Munir
Author: Poulose Poulose

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