TY - JOUR
T1 - Discovery and measurement of sleptons, binos, and winos with a Z′
AU - Baumgart, Matthew
AU - Hartman, Thomas
AU - Kilic, Can
AU - Wang, Lian Tao
PY - 2007/11/1
Y1 - 2007/11/1
N2 - Extensions of the MSSM could significantly alter its phenomenology at the LHC. We study the case in which the MSSM is extended by an additional U(1) gauge symmetry, which is spontaneously broken at a few TeV. The production cross-section of sleptons is enhanced over that of the MSSM by the process ppZ′*, so the discovery potential for sleptons is greatly increased. The flavor and charge information in the resulting decay, ℓ+LSP, provides a useful handle on the identity of the LSP. With the help of the additional kinematical constraint of an on-shell Z′, we implement a novel method to measure all of the superpartner masses involved in this channel. For certain final states with two invisible particles, one can construct kinematic observables bounded above by parent particle masses. We demonstrate how output from one such observable, m T2, can become input to a second, increasing the number of measurements one can make with a single decay chain. The method presented here represents a new class of observables which could have a much wider range of applicability.
AB - Extensions of the MSSM could significantly alter its phenomenology at the LHC. We study the case in which the MSSM is extended by an additional U(1) gauge symmetry, which is spontaneously broken at a few TeV. The production cross-section of sleptons is enhanced over that of the MSSM by the process ppZ′*, so the discovery potential for sleptons is greatly increased. The flavor and charge information in the resulting decay, ℓ+LSP, provides a useful handle on the identity of the LSP. With the help of the additional kinematical constraint of an on-shell Z′, we implement a novel method to measure all of the superpartner masses involved in this channel. For certain final states with two invisible particles, one can construct kinematic observables bounded above by parent particle masses. We demonstrate how output from one such observable, m T2, can become input to a second, increasing the number of measurements one can make with a single decay chain. The method presented here represents a new class of observables which could have a much wider range of applicability.
KW - Beyond standard model
KW - Supersymmetric standard model
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U2 - 10.1088/1126-6708/2007/11/084
DO - 10.1088/1126-6708/2007/11/084
M3 - Article
AN - SCOPUS:36849007517
SN - 1126-6708
VL - 2007
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 11
M1 - 084
ER -