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Title: Same-sign dilepton excesses and light top squarks

Abstract

Run 1 data of the Large Hadron Collider (LHC) contain excessive events in the same-sign dilepton channel with b-jets and missing transverse energy (MET), which were observed by five separate analyses from the ATLAS and CMS collaborations. We show that these events could be explained by direct production of top squarks in supersymmetry. In particular, a right-handed top squark with a mass of 550 GeV decaying into 2 t quarks, 2 W bosons, and MET could fit the observed excess without being constrained by other direct search limits from Run 1. We propose kinematic cuts at 13 TeV to enhance the top squark signal, and estimate that top squarks could be discovered with 40 fb(-1) of integrated luminosity at Run 2 of the LHC, when considering only the statistical uncertainty.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of High Energy Physics
OSTI Identifier:
1392564
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 92; Journal Issue: 7; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Huang, Peisi, Ismail, Ahmed, Low, Ian, and Wagner, Carlos E. M. Same-sign dilepton excesses and light top squarks. United States: N. p., 2015. Web. doi:10.1103/PhysRevD.92.075035.
Huang, Peisi, Ismail, Ahmed, Low, Ian, & Wagner, Carlos E. M. Same-sign dilepton excesses and light top squarks. United States. doi:10.1103/PhysRevD.92.075035.
Huang, Peisi, Ismail, Ahmed, Low, Ian, and Wagner, Carlos E. M. Thu . "Same-sign dilepton excesses and light top squarks". United States. doi:10.1103/PhysRevD.92.075035.
@article{osti_1392564,
title = {Same-sign dilepton excesses and light top squarks},
author = {Huang, Peisi and Ismail, Ahmed and Low, Ian and Wagner, Carlos E. M.},
abstractNote = {Run 1 data of the Large Hadron Collider (LHC) contain excessive events in the same-sign dilepton channel with b-jets and missing transverse energy (MET), which were observed by five separate analyses from the ATLAS and CMS collaborations. We show that these events could be explained by direct production of top squarks in supersymmetry. In particular, a right-handed top squark with a mass of 550 GeV decaying into 2 t quarks, 2 W bosons, and MET could fit the observed excess without being constrained by other direct search limits from Run 1. We propose kinematic cuts at 13 TeV to enhance the top squark signal, and estimate that top squarks could be discovered with 40 fb(-1) of integrated luminosity at Run 2 of the LHC, when considering only the statistical uncertainty.},
doi = {10.1103/PhysRevD.92.075035},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
issn = {1550-7998},
number = 7,
volume = 92,
place = {United States},
year = {2015},
month = {10}
}

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