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Deconstructing squark contributions to di-Higgs production at the LHC

Deconstructing squark contributions to di-Higgs production at the LHC
Deconstructing squark contributions to di-Higgs production at the LHC
We present a novel approach to the study of di-Higgs production via gluon-gluon fusion at the LHC. The relevant Feynman diagrams involving two Standard Model-like Higgs bosons $hh$ are computed within a simplified model approach that enables one to interpret possible signals of new physics in a model-independent way as well as to map these onto specific theories. This is possible thanks to a decomposition of such a signal process into all its squared amplitudes and their relative interferences, each of which has a well-defined coupling structure. We illustrate the power of this procedure for the case of both a minimal and next-to-minimal representation of Supersymmetry, for which the new physics effects are due to top squarks entering the loops of $gg\to hh$. The squarks yield both a change of the integrated cross section and peculiar kinematic features in its differential distributions with respect to the Standard Model. These effects can in turn be traced back to the relevant diagrammatic and coupling structures and allow for a detailed analysis of the process. In order to do so, we perform systematic scans of the parameter spaces of such new physics scenarios and identify benchmark points which exhibit potentially observable features during the current and upcoming runs of the LHC.
hep-ph, hep-ex
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Panizzi, Luca
e8ade38e-ee5d-4e2d-8307-3286a8b92740
Sjölin, Jörgen
fa74500d-b329-4306-ad34-5bd1e1f21cb3
Waltari, Harri
40b64912-03e3-4ed9-b3cd-b1951ab9b883
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Panizzi, Luca
e8ade38e-ee5d-4e2d-8307-3286a8b92740
Sjölin, Jörgen
fa74500d-b329-4306-ad34-5bd1e1f21cb3
Waltari, Harri
40b64912-03e3-4ed9-b3cd-b1951ab9b883

[Unknown type: UNSPECIFIED]

Record type: UNSPECIFIED

Abstract

We present a novel approach to the study of di-Higgs production via gluon-gluon fusion at the LHC. The relevant Feynman diagrams involving two Standard Model-like Higgs bosons $hh$ are computed within a simplified model approach that enables one to interpret possible signals of new physics in a model-independent way as well as to map these onto specific theories. This is possible thanks to a decomposition of such a signal process into all its squared amplitudes and their relative interferences, each of which has a well-defined coupling structure. We illustrate the power of this procedure for the case of both a minimal and next-to-minimal representation of Supersymmetry, for which the new physics effects are due to top squarks entering the loops of $gg\to hh$. The squarks yield both a change of the integrated cross section and peculiar kinematic features in its differential distributions with respect to the Standard Model. These effects can in turn be traced back to the relevant diagrammatic and coupling structures and allow for a detailed analysis of the process. In order to do so, we perform systematic scans of the parameter spaces of such new physics scenarios and identify benchmark points which exhibit potentially observable features during the current and upcoming runs of the LHC.

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2302.03401v1 - Author's Original
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Accepted/In Press date: 7 February 2023
Keywords: hep-ph, hep-ex

Identifiers

Local EPrints ID: 476805
URI: http://eprints.soton.ac.uk/id/eprint/476805
PURE UUID: a36a2d76-e044-48a7-9e6b-b1d249d8465c
ORCID for Stefano Moretti: ORCID iD orcid.org/0000-0002-8601-7246

Catalogue record

Date deposited: 16 May 2023 16:56
Last modified: 17 May 2023 01:37

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Contributors

Author: Stefano Moretti ORCID iD
Author: Luca Panizzi
Author: Jörgen Sjölin
Author: Harri Waltari

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