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Title: Reach of Fermilab Tevatron upgrades for SU(5) supergravity models with nonuniversal gaugino masses

Abstract

We explore the reach of luminosity upgrades of the Fermilab Tevatron collider for SU(5) supergravity models in which non-universal GUT-scale gaugino masses arise via a vacuum expectation value for the auxiliary component of a superfield that transforms as a 24, 75 or 200 dimensional representation of SU(5). This results in a different pattern of sparticle masses and mixing angles from what is expected in the minimal supergravity (MSUGRA) model with universal GUT scale gaugino masses. We find that the resulting signal cross sections, and hence the reach of the Tevatron, are sensitive to the gaugino masses at the GUT scale. In the 24 model, the large splitting amongst the two lightest neutralinos leads to SUSY events containing many isolated leptons, including events with a real leptonic Z boson plus jets plus missing energy signal which is visible over much of parameter space. In contrast, in the 75 and 200 models, the reach via leptonic SUSY signals is greatly reduced relative to MSUGRA, and the signal is usually visible only via the canonical Ee{sub T}+jets channel. (c) 2000 The American Physical Society.

Authors:
 [1];  [2];  [2];  [2];  [3]
  1. Department of Physics, Northwestern University, Evanston Illinois 60208 (United States)
  2. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
  3. Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822 (United States)
Publication Date:
OSTI Identifier:
20216163
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 61; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; SUPERGRAVITY; SU-5 GROUPS; FERMILAB TEVATRON; SPARTICLES; MASS; Z NEUTRAL BOSONS; GRAND UNIFIED THEORY; THEORETICAL DATA

Citation Formats

Anderson, Greg, Baer, Howard, Chen, Chih-Hao, Quintana, Pamela, and Tata, Xerxes. Reach of Fermilab Tevatron upgrades for SU(5) supergravity models with nonuniversal gaugino masses. United States: N. p., 2000. Web. doi:10.1103/PhysRevD.61.095005.
Anderson, Greg, Baer, Howard, Chen, Chih-Hao, Quintana, Pamela, & Tata, Xerxes. Reach of Fermilab Tevatron upgrades for SU(5) supergravity models with nonuniversal gaugino masses. United States. doi:10.1103/PhysRevD.61.095005.
Anderson, Greg, Baer, Howard, Chen, Chih-Hao, Quintana, Pamela, and Tata, Xerxes. Mon . "Reach of Fermilab Tevatron upgrades for SU(5) supergravity models with nonuniversal gaugino masses". United States. doi:10.1103/PhysRevD.61.095005.
@article{osti_20216163,
title = {Reach of Fermilab Tevatron upgrades for SU(5) supergravity models with nonuniversal gaugino masses},
author = {Anderson, Greg and Baer, Howard and Chen, Chih-Hao and Quintana, Pamela and Tata, Xerxes},
abstractNote = {We explore the reach of luminosity upgrades of the Fermilab Tevatron collider for SU(5) supergravity models in which non-universal GUT-scale gaugino masses arise via a vacuum expectation value for the auxiliary component of a superfield that transforms as a 24, 75 or 200 dimensional representation of SU(5). This results in a different pattern of sparticle masses and mixing angles from what is expected in the minimal supergravity (MSUGRA) model with universal GUT scale gaugino masses. We find that the resulting signal cross sections, and hence the reach of the Tevatron, are sensitive to the gaugino masses at the GUT scale. In the 24 model, the large splitting amongst the two lightest neutralinos leads to SUSY events containing many isolated leptons, including events with a real leptonic Z boson plus jets plus missing energy signal which is visible over much of parameter space. In contrast, in the 75 and 200 models, the reach via leptonic SUSY signals is greatly reduced relative to MSUGRA, and the signal is usually visible only via the canonical Ee{sub T}+jets channel. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevD.61.095005},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 9,
volume = 61,
place = {United States},
year = {2000},
month = {5}
}