Measuring the Lifetime of Trapped Sleptons Using the General Purpose LHC Detectors

Details Measuring the Lifetime of Trapped Sleptons Using the General Purpose LHC Detectors Measuring the Lifetime of Trapped Sleptons Using the General Purpose LHC Detectors

2010-06-16

arxiv.org/abs/1006.3293v1

Phys.Rev.D83:035021,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1103/PhysRevD.83.035021

In supergravity where the gravitino is the lightest supersymmetric particle (LSP), the next-to-lightest supersymmetric particle (NLSP) decays to the gravitino with a naturally long lifetime (10^4 - 10^8). However, cosmological constraints favour charged sleptons with lifetimes below a year as the natural NLSP candidate. For this scenario we report a method to accurately determine the slepton lifetime and SUSY cross-section from observation of the decays of sleptons trapped in the material comprising the main detector (ATLAS, CMS). A measurement of the lifetime to 5% is possible after 3 years at nominal luminosity and running conditions. This method is sensitive to the cosmologically preferred stau lifetime of ~37 days and does not require the use of ancillary trapping volumes.

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