Two Photon Background and the Reach of a Linear Collider for Supersymmetry in WMAP Favored Coannihilation Regions

Details Two Photon Background and the Reach of a Linear Collider for Supersymmetry in WMAP Favored Coannihilation Regions Two Photon Background and the Reach of a Linear Collider for Supersymmetry in WMAP Favored Coannihilation Regions

2004-05-06

arxiv.org/abs/hep-ph/0405058v1

JHEP 0406:061,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages including 9 eps figures

Scientific paper

10.1088/1126-6708/2004/06/061

A neutralino relic density in accord with WMAP measurements can be found in the minimal supergravity (mSUGRA) model in several regions of parameter space: the stau co-annihilation corridor at low m_0 and the hyperbolic branch/focus point (HB/FP) region at large m_0 at the edges of parameter space, and the bulk and Higgs boson funnel regions within. In the regions at the edge, the mass gap between the next-to-lightest SUSY particle (NLSP) and the lightest SUSY particle (LSP) becomes small, and backgrounds from $\gamma\gamma\to f\bar{f}$ ($f$ is a SM fermion) become important for NLSP detection at an $e^+e^-$ linear collider. We evaluate these backgrounds from bremsstrahlung and beamstrahlung photons, and demonstrate that these do not preclude the observability of the signal for the cases where either the stau or the chargino is the NLSP. We also delineate the additional portion of the stau coannihilation region, beyond what can be accessed via a search for selectrons and smuons, that can be probed by a search for di-tau-jet events plus missing energy. The reach of a LC for SUSY in the HB/FP region is shown for an updated value of $m_t\simeq 180$ GeV as recently measured by the $D\O$ experiment.

Affiliated with

Also associated with

No associations

Rating

Two Photon Background and the Reach of a Linear Collider for Supersymmetry in WMAP Favored Coannihilation Regions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Two Photon Background and the Reach of a Linear Collider for Supersymmetry in WMAP Favored Coannihilation Regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two Photon Background and the Reach of a Linear Collider for Supersymmetry in WMAP Favored Coannihilation Regions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-712040