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Title: Supersymmetry reach of Fermilab Tevatron upgrades: The large tanthinsp{beta} case

Abstract

The Yukawa couplings of the tau lepton and the bottom quark become comparable to, or even exceed, electroweak gauge couplings for large values of the supersymmetry parameter tanthinsp{beta}. As a result, the lightest tau slepton {tilde {tau}}{sub 1} and bottom squark {tilde b}{sub 1} can be significantly lighter than corresponding sleptons and squarks of the first two generations. Gluino, chargino, and neutralino decays to third generation particles are significantly enhanced when tanthinsp{beta} is large. This affects projections for collider experiment reach for supersymmetric particles. In this paper, we evaluate the reach of the Fermilab Tevatron p{bar p} collider for supersymmetric signals in the framework of the minimal supergravity model. We find that the reach via signatures with multiple isolated leptons ({ital e} and {mu}) is considerably reduced. For very large tanthinsp{beta}, the greatest reach is attained in the multijet+E{sub T}{sup miss} signature. Some significant extra regions may be probed by requiring the presence of an identified {ital b} jet in jets+E{sub T}{sup miss} events, or by requiring one of the identified leptons in clean trilepton events to actually be a hadronic 1 or 3 charged prong tau. In an appendix, we present formulas for chargino, neutralino, and gluino three bodymore » decays which are valid at large tanthinsp{beta}. {copyright} {ital 1998} {ital The American Physical Society}« less

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
  2. Department of Physics, University of California, Davis, California 95616 (United States)
  3. APCTP, 207-43 Cheongryangri-dong, Seoul 130-012 (Korea)
  4. Brookhaven National Laboratory, Upton, New York 11973 (United States)
  5. Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822 (United States)
Publication Date:
OSTI Identifier:
658524
Resource Type:
Journal Article
Journal Name:
Physical Review, D
Additional Journal Information:
Journal Volume: 58; Journal Issue: 7; Other Information: PBD: Oct 1998
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; FERMILAB TEVATRON; SUPERSYMMETRY; TAU PARTICLES; YUKAWA POTENTIAL; SUPERGRAVITY; PROTON-ANTIPROTON INTERACTIONS; HIGGS BOSONS; SYMMETRY BREAKING; MUONS PLUS; QUARK MODEL

Citation Formats

Baer, H, Chen, C, Drees, M, Paige, F, and Tata, X. Supersymmetry reach of Fermilab Tevatron upgrades: The large tanthinsp{beta} case. United States: N. p., 1998. Web. doi:10.1103/PhysRevD.58.075008.
Baer, H, Chen, C, Drees, M, Paige, F, & Tata, X. Supersymmetry reach of Fermilab Tevatron upgrades: The large tanthinsp{beta} case. United States. https://doi.org/10.1103/PhysRevD.58.075008
Baer, H, Chen, C, Drees, M, Paige, F, and Tata, X. 1998. "Supersymmetry reach of Fermilab Tevatron upgrades: The large tanthinsp{beta} case". United States. https://doi.org/10.1103/PhysRevD.58.075008.
@article{osti_658524,
title = {Supersymmetry reach of Fermilab Tevatron upgrades: The large tanthinsp{beta} case},
author = {Baer, H and Chen, C and Drees, M and Paige, F and Tata, X},
abstractNote = {The Yukawa couplings of the tau lepton and the bottom quark become comparable to, or even exceed, electroweak gauge couplings for large values of the supersymmetry parameter tanthinsp{beta}. As a result, the lightest tau slepton {tilde {tau}}{sub 1} and bottom squark {tilde b}{sub 1} can be significantly lighter than corresponding sleptons and squarks of the first two generations. Gluino, chargino, and neutralino decays to third generation particles are significantly enhanced when tanthinsp{beta} is large. This affects projections for collider experiment reach for supersymmetric particles. In this paper, we evaluate the reach of the Fermilab Tevatron p{bar p} collider for supersymmetric signals in the framework of the minimal supergravity model. We find that the reach via signatures with multiple isolated leptons ({ital e} and {mu}) is considerably reduced. For very large tanthinsp{beta}, the greatest reach is attained in the multijet+E{sub T}{sup miss} signature. Some significant extra regions may be probed by requiring the presence of an identified {ital b} jet in jets+E{sub T}{sup miss} events, or by requiring one of the identified leptons in clean trilepton events to actually be a hadronic 1 or 3 charged prong tau. In an appendix, we present formulas for chargino, neutralino, and gluino three body decays which are valid at large tanthinsp{beta}. {copyright} {ital 1998} {ital The American Physical Society}},
doi = {10.1103/PhysRevD.58.075008},
url = {https://www.osti.gov/biblio/658524}, journal = {Physical Review, D},
number = 7,
volume = 58,
place = {United States},
year = {1998},
month = {10}
}