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Efficient reconstruction of constrained MSSM parameters from LHC data: A case study

Roszkowski, L., Ruiz de Austri, R. and Trotta, R. (2010) Efficient reconstruction of constrained MSSM parameters from LHC data: A case study. Physical Review D (PRD), 82 (5). Art. no.055003. ISSN 1550-7998

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Abstract

We present an efficient method of reconstructing the parameters of the constrained MSSM from assumed future LHC data, applied both on their own right and in combination with the cosmological determination of the relic dark matter abundance. Focusing on the ATLAS SU3 benchmark point, we demonstrate that our simple Gaussian approximation can recover the values of its parameters remarkably well. We examine two popular noninformative priors and obtain very similar results, although when we use an informative, naturalness-motivated prior, we find some sizeable differences. We show that a further strong improvement in reconstructing the SU3 parameters can by achieved by applying additional information about the relic abundance at the level of WMAP accuracy, although the expected data from Planck will have only a very limited additional impact. Further external data may be required to break some remaining degeneracies. We argue that the method presented here is applicable to a wide class of low-energy effective supersymmetric models, as it does not require one to deal with purely experimental issues, e.g., detector performance, and has the additional advantages of computational efficiency. Furthermore, our approach allows one to distinguish the effect of the model's internal structure and of the external data on the final parameters constraints.

Item Type: Article
Copyright, Publisher and Additional Information: © 2010 American Physical Society. This is an author produced version of a paper subsequently published in Physical Review D. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Particle Physics; Hadron Colliders; Supersymmetry; Supergravity; Micromegas; Program; Masses
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 24 Sep 2010 10:22
Last Modified: 08 Feb 2013 17:01
Published Version: http://dx.doi.org/10.1103/PhysRevD.82.055003
Status: Published
Publisher: American Physical Society
Refereed: Yes
Identification Number: 10.1103/PhysRevD.82.055003
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/11224

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