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LHC phenomenology of light pseudoscalars in the NMSSM

LHC phenomenology of light pseudoscalars in the NMSSM
LHC phenomenology of light pseudoscalars in the NMSSM
After the discovery of the 125 GeV Higgs boson, the Next-to-Minimal Supersymmetric Standard Model (NMSSM) has become more interesting as a model for new physics since new tree-level contributions to the Higgs mass makes it easier to accommodate the relatively high measured value, as compared to the MSSM. One very distinctive feature of the NMSSM is the possible existence of a light singlet-like pseudoscalar. As this pseudoscalar may be lighter than the discovered Higgs boson without conflict with data, it may lead to LHC signatures rather different to what is usually searched for in terms of new physics. In these proceedings we will discuss studies concerning the discoverability of such light pseudoscalars. It is demonstrated that heavier scalars decaying to pairs of pseudoscalars or pseudoscalars and Z bosons may lead to discovery in a large part of the parameter space. This is especially important for the non-SM like of the two lightest scalars, as it may have an almost 100% branching ratio for decay into pairs of pseudoscalars. In such a case the discussed channels might be our only means of discovery, also for the scalar.
hep-ph
Bomark, N.-E.
a742c083-7042-4dc1-a746-95bf64299b4a
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Munir, S.
1cc7db7a-fc80-47fe-a59c-e75c1ff7e776
Roszkowski, L.
c2e7e7e7-a3f9-4d23-872b-564921be6677
Bomark, N.-E.
a742c083-7042-4dc1-a746-95bf64299b4a
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Munir, S.
1cc7db7a-fc80-47fe-a59c-e75c1ff7e776
Roszkowski, L.
c2e7e7e7-a3f9-4d23-872b-564921be6677

Bomark, N.-E., Moretti, S., Munir, S. and Roszkowski, L. (2016) LHC phenomenology of light pseudoscalars in the NMSSM. Proceedings of Science, EPS-HEP2015, [162].

Record type: Article

Abstract

After the discovery of the 125 GeV Higgs boson, the Next-to-Minimal Supersymmetric Standard Model (NMSSM) has become more interesting as a model for new physics since new tree-level contributions to the Higgs mass makes it easier to accommodate the relatively high measured value, as compared to the MSSM. One very distinctive feature of the NMSSM is the possible existence of a light singlet-like pseudoscalar. As this pseudoscalar may be lighter than the discovered Higgs boson without conflict with data, it may lead to LHC signatures rather different to what is usually searched for in terms of new physics. In these proceedings we will discuss studies concerning the discoverability of such light pseudoscalars. It is demonstrated that heavier scalars decaying to pairs of pseudoscalars or pseudoscalars and Z bosons may lead to discovery in a large part of the parameter space. This is especially important for the non-SM like of the two lightest scalars, as it may have an almost 100% branching ratio for decay into pairs of pseudoscalars. In such a case the discussed channels might be our only means of discovery, also for the scalar.

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More information

Published date: 16 March 2016
Additional Information: 6 pages, 4 figures, to appear in proceedings for the EPS-HEP 2015 conference
Keywords: hep-ph
Organisations: Theory Group

Identifiers

Local EPrints ID: 411851
URI: http://eprints.soton.ac.uk/id/eprint/411851
PURE UUID: 916213c0-a88d-49a0-9bdc-6fb6633ef970
ORCID for S. Moretti: ORCID iD orcid.org/0000-0002-8601-7246

Catalogue record

Date deposited: 27 Jun 2017 16:31
Last modified: 16 Mar 2024 03:34

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Contributors

Author: N.-E. Bomark
Author: S. Moretti ORCID iD
Author: S. Munir
Author: L. Roszkowski

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