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Type: Journal article
Title: Single top squark production as a probe of natural supersymmetry at the LHC
Author: Hikasa, K.
Li, J.
Wu, L.
Yang, J.
Citation: Physical Review D - Particles, Fields, Gravitation and Cosmology, 2016; 93(3):035003-1-035003-6
Publisher: American Physical Society
Issue Date: 2016
ISSN: 1550-7998
Statement of
Ken-ichi Hikasa, Jinmian Li, Lei Wu, and Jin Min Yang
Abstract: Light top squarks (stops) and light higgsinos are the key features of natural supersymmetry (SUSY), where the higgsinos ˜χ±1 and ˜χ01,2 are nearly degenerate and act as the missing transverse energy (ET) at the LHC. Besides the pair production via strong interaction, the stop can be produced via the electroweak interaction. The determination of the electroweak properties of the stop is an essential task for the LHC and future colliders. So, in this paper, we investigate the single stop (˜t1) production pp→˜t1+ET via the electroweak interaction in natural SUSY at the LHC, which gives the monotop signature t+ET from ˜t1→t˜χ01,2 or the monobottom signature b+ET from ˜t1→b˜χ+1. We perform Monte Carlo simulations for these signatures and obtain the observations: (1) The signal b+ET has a better sensitivity than t+ET for probing natural SUSY; (2) the parameter region with a higgsino mass 100  GeV≲μ≲225  GeV and stop mass m˜t1≲620  GeV can be probed through such single stop production with S/√B>3 and 4%≲S/B≲19% at the 14 TeV LHC with an integrated luminosity of 3000  fb−¹.
Description: Published 4 February 2016
Rights: © 2016 American Physical Society
RMID: 0030045258
DOI: 10.1103/PhysRevD.93.035003
Appears in Collections:Physics publications

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