Measuring the SUSY breaking scale at the LHC in the slepton NLSP scenario of GMSB models

Citation
S. Ambrosanio et al., Measuring the SUSY breaking scale at the LHC in the slepton NLSP scenario of GMSB models, J HIGH EN P, 2001(1), 2001, pp. NIL_307-NIL_335
Citations number
35
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
JOURNAL OF HIGH ENERGY PHYSICS
ISSN journal
1029-8479 → ACNP
Volume
2001
Issue
1
Year of publication
2001
Pages
NIL_307 - NIL_335
Database
ISI
SICI code
1029-8479(200101)2001:1<NIL_307:MTSBSA>2.0.ZU;2-W
Abstract
We report a study on the measurement of the SUSY breaking scale root(F) ove r bar in the framework of gauge-mediated supersymmetry breaking (GMSB) mode ls at the LHC. The work is focused on the GMSB scenario where a stau is the next-to-lightest SUSY particle (NLSP) and decays into a gravitino with lif etime c tau (NLSP) in the range 0.5 m to 1 km. We study the identification of long-lived sleptons using the momentum and time of flight measurements i n the muon chambers of the ATLAS experiment. A realistic evaluation of the statistical and systematic uncertainties on the measurement of the slepton mass and lifetime is performed, based on a detailed simulation of the detec tor response. Accessible range and precision on root(F) over bar achievable with a counting method are assessed. Many features of our analysis can be extended to the study of different theoretical frameworks with similar sign atures at the LHC.