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

Abstract

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.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Dept. of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
  2. (United States)
  3. Dept. of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States)
  4. California Institute of Technology, Mail Code 106-38, Pasadena, California 91125 (United States)
  5. Dept. of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822 (United States)
Publication Date:
OSTI Identifier:
21011007
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.75.035004; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Baer, Howard, Dept. of Physics, Florida State University, Tallahassee, Florida 32306, Mustafayev, Azar, Profumo, Stefano, and Tata, Xerxes. Probing supersymmetry beyond the reach of LEP2 at the Fermilab Tevatron: Low |M{sup 3}| dark matter models. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.035004.
Baer, Howard, Dept. of Physics, Florida State University, Tallahassee, Florida 32306, Mustafayev, Azar, Profumo, Stefano, & Tata, Xerxes. Probing supersymmetry beyond the reach of LEP2 at the Fermilab Tevatron: Low |M{sup 3}| dark matter models. United States. doi:10.1103/PHYSREVD.75.035004.
Baer, Howard, Dept. of Physics, Florida State University, Tallahassee, Florida 32306, Mustafayev, Azar, Profumo, Stefano, and Tata, Xerxes. Thu . "Probing supersymmetry beyond the reach of LEP2 at the Fermilab Tevatron: Low |M{sup 3}| dark matter models". United States. doi:10.1103/PHYSREVD.75.035004.
@article{osti_21011007,
title = {Probing supersymmetry beyond the reach of LEP2 at the Fermilab Tevatron: Low |M{sup 3}| dark matter models},
author = {Baer, Howard and Dept. of Physics, Florida State University, Tallahassee, Florida 32306 and Mustafayev, Azar and Profumo, Stefano and Tata, Xerxes},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.75.035004},
journal = {Physical Review. D, Particles Fields},
number = 3,
volume = 75,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2007},
month = {Thu Feb 01 00:00:00 EST 2007}
}