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 ditau 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 eventbyeventmore »
 Authors:

 Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
 IFT, Universidade Estadual Paulista, 01405900 Sao Paulo (Brazil)
 Brookhaven National Laboratory, Upton, New York 11973 (United States)
 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; PROTONPROTON 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 ditau 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 eventbyevent 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}
}