Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-10-22
JHEP 0412:003,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
57 pages, several figures, some of which should be viewed/printed in colour. v2: version accepted for publication
Scientific paper
10.1088/1126-6708/2004/12/003
If R-parity conserving supersymmetry exists below the TeV-scale, new particles will be produced and decay in cascades at the LHC. The lightest supersymmetric particle will escape the detectors, thereby complicating the full reconstruction of the decay chains. In this paper we expand on existing methods for determining the masses of the particles in the cascade from endpoints of kinematical distributions. We perform scans in the mSUGRA parameter space to delimit the region where this method is applicable. From the examination of theoretical distributions for a wide selection of mass scenarios it is found that caution must be exerted when equating the theoretical endpoints with the experimentally obtainable ones. We provide analytic formulae for the masses in terms of the endpoints most readily available. Complications due to the composite nature of the endpoint expressions are discussed in relation to the detailed analysis of two points on the SPS~1a line. Finally we demonstrate how a Linear Collider measurement can improve dramatically on the precision of the masses obtained.
Gjelsten B. K.
Miller Daniel J.
Osland Per
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