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Title: Probing minimal supergravity at the CERN LHC for large tan&hthinsp;{beta}

Abstract

For large values of the minimal supergravity model parameter tan&hthinsp;{beta}, the tau lepton and the bottom quark Yukawa couplings become large, leading to reduced masses of {tau} sleptons and {ital b} squarks relative to their first and second generation counterparts, and to enhanced decays of charginos and neutralinos to {tau} leptons and {ital b} quarks. We evaluate the reach of the CERN Large Hadron Collider (LHC) pp collider for supersymmetry in the MSUGRA model parameter space. We find that values of m{sub {tilde g}}{approximately}1500{endash}2000 GeV can be probed with just 10 fb{sup {minus}1} of integrated luminosity for tan&hthinsp;{beta} values as high as 45, so that MSUGRA cannot escape the scrutiny of LHC experiments by virtue of having a large value of tan&hthinsp;{beta}. We also perform a case study of an MSUGRA model at tan&hthinsp;{beta}=45 where {tilde Z}{sub 2}{r_arrow}{tau}{tilde {tau}}{sub 1} and {tilde W}{sub 1}{r_arrow}{tilde {tau}}{sub 1}{nu}{sub {tau}} with {approximately}100{percent} branching fraction. In this case, at least within our simplistic study, we show that a di-tau mass edge, which determines the value of m{sub {tilde Z}{sub 2}}{minus}m{sub {tilde Z}{sub 1}}, can still be reconstructed. This information can be used as a starting point for reconstructing SUSY cascade decays on an event-by-eventmore » basis, and can provide a strong constraint in determining the underlying model parameters. Finally, we show that for large tan&hthinsp;{beta}, there can be an observable excess of {tau} leptons, and argue that {tau} signals might serve to provide new information about the underlying model framework. {copyright} {ital 1999} {ital The American Physical Society}« less

Authors:
;  [1];  [2];  [3];  [4]
  1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
  2. IFT, Universidade Estadual Paulista, 01405-900 Sao Paulo (Brazil)
  3. Brookhaven National Laboratory, Upton, New York 11973 (United States)
  4. Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii 96822 (United States)
Publication Date:
OSTI Identifier:
310027
Resource Type:
Journal Article
Journal Name:
Physical Review, D
Additional Journal Information:
Journal Volume: 59; Journal Issue: 5; Other Information: PBD: Mar 1999
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; TAU PARTICLES; SUPERGRAVITY; SUPERSYMMETRY; SPARTICLES; YUKAWA POTENTIAL; PROTON-PROTON INTERACTIONS; CERN

Citation Formats

Baer, H, Chen, C, Drees, M, Paige, F, and Tata, X. Probing minimal supergravity at the CERN LHC for large tan&hthinsp;{beta}. United States: N. p., 1999. Web. doi:10.1103/PhysRevD.59.055014.
Baer, H, Chen, C, Drees, M, Paige, F, & Tata, X. Probing minimal supergravity at the CERN LHC for large tan&hthinsp;{beta}. United States. https://doi.org/10.1103/PhysRevD.59.055014
Baer, H, Chen, C, Drees, M, Paige, F, and Tata, X. Mon . "Probing minimal supergravity at the CERN LHC for large tan&hthinsp;{beta}". United States. https://doi.org/10.1103/PhysRevD.59.055014.
@article{osti_310027,
title = {Probing minimal supergravity at the CERN LHC for large tan&hthinsp;{beta}},
author = {Baer, H and Chen, C and Drees, M and Paige, F and Tata, X},
abstractNote = {For large values of the minimal supergravity model parameter tan&hthinsp;{beta}, the tau lepton and the bottom quark Yukawa couplings become large, leading to reduced masses of {tau} sleptons and {ital b} squarks relative to their first and second generation counterparts, and to enhanced decays of charginos and neutralinos to {tau} leptons and {ital b} quarks. We evaluate the reach of the CERN Large Hadron Collider (LHC) pp collider for supersymmetry in the MSUGRA model parameter space. We find that values of m{sub {tilde g}}{approximately}1500{endash}2000 GeV can be probed with just 10 fb{sup {minus}1} of integrated luminosity for tan&hthinsp;{beta} values as high as 45, so that MSUGRA cannot escape the scrutiny of LHC experiments by virtue of having a large value of tan&hthinsp;{beta}. We also perform a case study of an MSUGRA model at tan&hthinsp;{beta}=45 where {tilde Z}{sub 2}{r_arrow}{tau}{tilde {tau}}{sub 1} and {tilde W}{sub 1}{r_arrow}{tilde {tau}}{sub 1}{nu}{sub {tau}} with {approximately}100{percent} branching fraction. In this case, at least within our simplistic study, we show that a di-tau mass edge, which determines the value of m{sub {tilde Z}{sub 2}}{minus}m{sub {tilde Z}{sub 1}}, can still be reconstructed. This information can be used as a starting point for reconstructing SUSY cascade decays on an event-by-event basis, and can provide a strong constraint in determining the underlying model parameters. Finally, we show that for large tan&hthinsp;{beta}, there can be an observable excess of {tau} leptons, and argue that {tau} signals might serve to provide new information about the underlying model framework. {copyright} {ital 1999} {ital The American Physical Society}},
doi = {10.1103/PhysRevD.59.055014},
url = {https://www.osti.gov/biblio/310027}, journal = {Physical Review, D},
number = 5,
volume = 59,
place = {United States},
year = {1999},
month = {3}
}