Probing supersymmetry beyond the reach of LEP2 at the Fermilab Tevatron: Low |M{sup 3}| dark matter models

Journal Article · Thu Feb 01 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.035004· OSTI ID:21011007

Baer, Howard ^[1]; Mustafayev, Azar ^[2]; Profumo, Stefano ^[3]; Tata, Xerxes ^[4]

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1. Dept. of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
2. Dept. of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States)
3. California Institute of Technology, Mail Code 106-38, Pasadena, California 91125 (United States)
4. Dept. of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822 (United States)

In supersymmetric models where the magnitude of the GUT scale gaugino mass parameter M{sub 3} is suppressed relative to M{sub 1} and M{sub 2}, the lightest neutralino can be a mixed higgsino-bino state with a thermal relic abundance in agreement with the WMAP central value for {omega}{sub CDM}h{sup 2} and consistent with all other phenomenological constraints. In these models, the gluino can be as light as 200 GeV without conflicting with the LEP2 bounds on the chargino mass. Thus, gluino pair production can be accessible at the Fermilab Tevatron at high rates. In this framework, gluinos decay radiatively with a large branching fraction to a gluon plus a neutralino. We find that experiments at the Fermilab Tevatron, with 5 fb{sup -1} of integrated luminosity, will be sensitive to g-tilde g-tilde production in the m{sub g-tilde}{approx}200-350 GeV range via the multi-jet+E{sub T}{sup miss} and multi-jet+l{sup +}l{sup -}+E{sub T}{sup miss} channels at the 5{sigma} level, while trilepton signatures are expected to be below this level of detectability. Dilepton mass edges from both Z-tilde{sub 2} and Z-tilde{sub 3} decays may be measurable in the dilepton+multi-jet+E{sub T}{sup miss} channel.

• OSTI ID: 21011007
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
FERMILAB TEVATRON
GEV RANGE
GLUONS
GRAND UNIFIED THEORY
JET MODEL
NONLUMINOUS MATTER
PAIR PRODUCTION
PARTICLE DECAY
REST MASS
SPARTICLES
SUPERSYMMETRY