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

Journal Article · Wed Sep 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.055003· OSTI ID:21421055

Roszkowski, Leszek ^[1]; Ruiz de Austri, Roberto ^[2]; Trotta, Roberto ^[3]

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1. Department of Physics and Astronomy, University of Sheffield, Sheffield, S3 7RH (United Kingdom)
2. Instituto de Fisica Corpuscular, IFIC-UV/CSIC, Valencia (Spain)
3. Astrophysics Group, Imperial College, Blackett Laboratory, Prince Consort Road, London SW7 2AZ (United Kingdom)

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.

• OSTI ID: 21421055
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevD.82.055003; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
BENCHMARKS
CERN LHC
EFFICIENCY
NONLUMINOUS MATTER
STANDARD MODEL
SU-3 GROUPS
SUPERSYMMETRY
ACCELERATORS
CALCULATION METHODS
CYCLIC ACCELERATORS
FIELD THEORIES
GRAND UNIFIED THEORY
LIE GROUPS
MATHEMATICAL MODELS
MATTER
PARTICLE MODELS
QUANTUM FIELD THEORY
STORAGE RINGS
SU GROUPS
SYMMETRY
SYMMETRY GROUPS
SYNCHROTRONS
UNIFIED GAUGE MODELS