Mass and Spin Measurement with M_T2 and MAOS Momentum
Won Sang Cho, Kiwoon Choi, Yeong Gyun Kim, Chan Beom Park
TL;DR
This paper introduces the M_T2-kink method for mass determination and the MAOS momentum for approximating invisible particle momenta, applied to SUSY, UED, and Higgs processes at the LHC.
Contribution
It presents a new kinematic variable, MAOS momentum, for systematic approximation of invisible momenta and demonstrates its application in mass and spin measurements at the LHC.
Findings
MAOS momentum effectively approximates invisible particle momenta.
The M_T2-kink method accurately determines particle masses.
Applications include SUSY, UED, and Higgs mass and spin measurements.
Abstract
We discuss the M_T2-kink method to determine the masses of both the dark matter WIMP and its mother particle produced at the LHC. We then introduce a new kinematic variable, the M_T2-Assisted-On-Shell (MAOS) momentum, that provides a systematic approximation to the invisible particle momenta in hadron collider events producing a pair of invisible particles, and apply it to certain SUSY processes and their UED equivalents to determine the spin of gluino/KK-gluon and of slepton/KK-lepton. An application of the MAOS momentum to the SM Higgs mass measurement is briefly discussed also.
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