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Exploring the di-photon decay of a light Higgs boson in the MSSM with explicit CP violation

Exploring the di-photon decay of a light Higgs boson in the MSSM with explicit CP violation
Exploring the di-photon decay of a light Higgs boson in the MSSM with explicit CP violation
The di-photon decay channel of the lightest Higgs boson is considered as a probe to explore CP violation in the minimal supersymmetric standard model (MSSM). The scalar/pseudo-scalar mixing is considered along with CP violation entering through the Higgs–sfermion–sfermion couplings, with and without light sparticles. The impact of a light stop on the decay width and branching ratio (BR) is established through a detailed study of the amplitude of the process H1→γγ. The other sparticles have little influence even when they are light. With a suitable combination of other MSSM parameters, a light stop can change the BR by more than 50% with a CP-violating phase φμ∼90°, while the change is almost nil with a heavy stop.
1434-6044
129-147
Hesselbach, S.
7aaff8e7-583a-4aec-b423-54cbf7a8bdd3
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Munir, S.
1cc7db7a-fc80-47fe-a59c-e75c1ff7e776
Poulose, P.
83278fa6-11c6-4ef0-a23f-cece98be5fa2
Hesselbach, S.
7aaff8e7-583a-4aec-b423-54cbf7a8bdd3
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Munir, S.
1cc7db7a-fc80-47fe-a59c-e75c1ff7e776
Poulose, P.
83278fa6-11c6-4ef0-a23f-cece98be5fa2

Hesselbach, S., Moretti, S., Munir, S. and Poulose, P. (2008) Exploring the di-photon decay of a light Higgs boson in the MSSM with explicit CP violation. The European Physical Journal C, 54 (1), 129-147. (doi:10.1140/epjc/s10052-007-0503-4).

Record type: Article

Abstract

The di-photon decay channel of the lightest Higgs boson is considered as a probe to explore CP violation in the minimal supersymmetric standard model (MSSM). The scalar/pseudo-scalar mixing is considered along with CP violation entering through the Higgs–sfermion–sfermion couplings, with and without light sparticles. The impact of a light stop on the decay width and branching ratio (BR) is established through a detailed study of the amplitude of the process H1→γγ. The other sparticles have little influence even when they are light. With a suitable combination of other MSSM parameters, a light stop can change the BR by more than 50% with a CP-violating phase φμ∼90°, while the change is almost nil with a heavy stop.

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e-pub ahead of print date: 26 January 2008
Published date: March 2008
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 150815
URI: http://eprints.soton.ac.uk/id/eprint/150815
ISSN: 1434-6044
PURE UUID: 96de6cc6-e5bf-4f99-88a4-d79697492e8a

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Date deposited: 26 Sep 2013 15:57
Last modified: 17 Jul 2019 00:01

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