Scrutinizing the lightest supersymmetric particle dark matter at the CERN LHC - art. no. 035008

Citation
M. Drees et al., Scrutinizing the lightest supersymmetric particle dark matter at the CERN LHC - art. no. 035008, PHYS REV D, 6303(3), 2001, pp. 5008
Citations number
42
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6303
Issue
3
Year of publication
2001
Database
ISI
SICI code
0556-2821(20010201)6303:3<5008:STLSPD>2.0.ZU;2-Q
Abstract
We show that CERN LHC experiments might well be able to determine ail the p arameters required for a prediction of the present density of thermal LSP r elies from the big bang era. If the LSP is an almost pure B-ino we usually only need to determine its mass and the mass of the SU(2) singlet sleptons. This information can be obtained by reconstructing the cascade (q) over ti lde (L)-->(chi )over tilde>(0)(2)q-->(l) over tilde (R)lq--><(<chi>)over ti lde>(0)(1)l(+l-)q. The only requirement is that m (l) over tildeR<m<(chi )o ver bar>(0)(2), which is true for most of the cosmologically interesting pa rameter space. If the LSP has a significant Higgsino component, its predict ed thermal relic density is smaller than for an equal-mass B-ino, We show t hat in this case squark decays also produce significant numbers of <(<chi>) over tilde>(0)(4) and <(<chi>)over tilde>(+/-)(2). Reconstructing the corre sponding decay cascades then allows us to determine the Higgsino component of the LSP.