Measurement of the gluino mass via cascade decays for SPS 1a

Gjelsten, B.K., Miller, D.J. and Osland, P. (2005) Measurement of the gluino mass via cascade decays for SPS 1a. Journal of High Energy Physics, 2005, 015. (doi: 10.1088/1126-6708/2005/06/015)

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If R-parity conserving supersymmetry is realised with masses below the TeV scale, sparticles will be produced and decay in cascades at the LHC. In the case of a neutral LSP, which will not be detected, decay chains cannot be fully reconstructed, complicating the mass determination of the new particles. In this paper we extend the method of obtaining masses from kinematical endpoints to include a gluino at the head of a five-sparticle decay chain. This represents a non-trivial extension of the corresponding method for the squark decay chain. We calculate the endpoints of the new distributions and assess their applicability by examining the theoretical distributions for a variety of mass scenarios. The precision with which the gluino mass can be determined by this method is investigated for the mSUGRA point SPS 1a. Finally we estimate the improvement obtained from adding a Linear Collider measurement of the LSP mass.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Miller, Dr David
Authors: Gjelsten, B.K., Miller, D.J., and Osland, P.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of High Energy Physics
Publisher:IOP Publishing
ISSN (Online):1029-8479

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
389601A phenomenological investigation of physics beyond the standard model at the next generation of collidersDavid MillerParticle Physics & Astronomy Research Council (PPARC)PP/C 502722/1P&A - PHYSICS & ASTRONOMY