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Title: Supersymmetric dark matter in the light of CERN LEP and the Fermilab Tevatron collider

Abstract

We analyze the accelerator constraints on the parameter space of the minimal supersymmetric extension of the standard model, comparing those now available from CERN LEP II and anticipating the likely sensitivity of Fermilab Tevatron run II. The most important limits are those from searches for charginos {chi}{sup {+-}}, neutralinos {chi}{sub i} and Higgs bosons at LEP, and searches for top squarks, charginos and neutralinos at the Tevatron collider. We also incorporate the constraints derived from b{yields}s{gamma} decay, and discuss the relevance of charge- and color-breaking minima in the effective potential. We combine and compare the different constraints on the Higgs-mixing parameter {mu}, the gaugino-mass parameter m{sub 1/2} and the scalar-mass parameter m{sub 0}, incorporating radiative corrections to the physical particle masses. We focus on the resulting limitations on supersymmetric dark matter, assumed to be the lightest neutralino {chi}, incorporating coannihilation effects in the calculation of the relic abundance. We find that m{sub {chi}}>51 GeV and tan{beta}>2.2 if all soft supersymmetry-breaking scalar masses are universal, including those of the Higgs bosons, and that these limits weaken to m{sub {chi}}>46 GeV and tan{beta}>1.9 if nonuniversal scalar masses are allowed. Light neutralino dark matter cannot be primarily Higgsino in composition. (c) 2000 Themore » American Physical Society.« less

Authors:
 [1];  [2];  [3];  [4]
  1. TH Division, CERN, Geneva, (Switzerland)
  2. Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
  3. Max-Planck-Institut fuer Physik, Munich, (Germany)
  4. Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
Publication Date:
OSTI Identifier:
20217744
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 62; Journal Issue: 7; Other Information: PBD: 1 Oct 2000; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; NONLUMINOUS MATTER; SUPERSYMMETRY; FERMILAB TEVATRON; STANDARD MODEL; SPARTICLES; HIGGS BOSONS; RADIATIVE CORRECTIONS; THEORETICAL DATA

Citation Formats

Ellis, John, Falk, Toby, Ganis, Gerardo, and Olive, Keith A. Supersymmetric dark matter in the light of CERN LEP and the Fermilab Tevatron collider. United States: N. p., 2000. Web. doi:10.1103/PhysRevD.62.075010.
Ellis, John, Falk, Toby, Ganis, Gerardo, & Olive, Keith A. Supersymmetric dark matter in the light of CERN LEP and the Fermilab Tevatron collider. United States. https://doi.org/10.1103/PhysRevD.62.075010
Ellis, John, Falk, Toby, Ganis, Gerardo, and Olive, Keith A. 2000. "Supersymmetric dark matter in the light of CERN LEP and the Fermilab Tevatron collider". United States. https://doi.org/10.1103/PhysRevD.62.075010.
@article{osti_20217744,
title = {Supersymmetric dark matter in the light of CERN LEP and the Fermilab Tevatron collider},
author = {Ellis, John and Falk, Toby and Ganis, Gerardo and Olive, Keith A},
abstractNote = {We analyze the accelerator constraints on the parameter space of the minimal supersymmetric extension of the standard model, comparing those now available from CERN LEP II and anticipating the likely sensitivity of Fermilab Tevatron run II. The most important limits are those from searches for charginos {chi}{sup {+-}}, neutralinos {chi}{sub i} and Higgs bosons at LEP, and searches for top squarks, charginos and neutralinos at the Tevatron collider. We also incorporate the constraints derived from b{yields}s{gamma} decay, and discuss the relevance of charge- and color-breaking minima in the effective potential. We combine and compare the different constraints on the Higgs-mixing parameter {mu}, the gaugino-mass parameter m{sub 1/2} and the scalar-mass parameter m{sub 0}, incorporating radiative corrections to the physical particle masses. We focus on the resulting limitations on supersymmetric dark matter, assumed to be the lightest neutralino {chi}, incorporating coannihilation effects in the calculation of the relic abundance. We find that m{sub {chi}}>51 GeV and tan{beta}>2.2 if all soft supersymmetry-breaking scalar masses are universal, including those of the Higgs bosons, and that these limits weaken to m{sub {chi}}>46 GeV and tan{beta}>1.9 if nonuniversal scalar masses are allowed. Light neutralino dark matter cannot be primarily Higgsino in composition. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevD.62.075010},
url = {https://www.osti.gov/biblio/20217744}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 62,
place = {United States},
year = {2000},
month = {10}
}