Top-squark in natural SUSY under current LHC run-2 data

被引：32

作者：

Han, Chengcheng ^{[4
]}

Ren, Jie ^{[5
]}

Wu, Lei ^{[1
,2
,3
]}

Yang, Jin Min ^{[6
]}

Zhang, Mengchao ^{[7
]}

机构：

[1] Nanjing Normal Univ, Dept Phys, Nanjing 210023, Jiangsu, Peoples R China

[2] Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210023, Jiangsu, Peoples R China

[3] Univ Sydney, Sch Phys, ARC Ctr Excellence Particle Phys Terascale, Sydney, NSW 2006, Australia

[4] Univ Tokyo, Kavli IPMU WPI, UTIAS, Kashiwa, Chiba 2778583, Japan

[5] Chinese Acad Sci, Comp Network Informat Ctr, Beijing 100190, Peoples R China

[6] Chinese Acad Sci, Inst Theoret Phys, Key Lab Theoret Phys, Beijing 100190, Peoples R China

[7] Inst for Basic Sci Korea, Ctr Theoret Phys & Universe, Taejon 34051, South Korea

来源：

EUROPEAN PHYSICAL JOURNAL C | 2017年 / 77卷 / 02期

基金：

中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

EVEN HIGGS BOSONS; BREAKING; PROGRAM; MASSES; MSSM;

D O I：

10.1140/epjc/s10052-017-4662-7

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We utilize the recent LHC-13 TeV data to study the lower mass bound on the top-squark (stop) in natural supersymmetry. We recast the LHC sparticle inclusive search of (>= 1) jets+E-T with alpha(T) variable, the direct stop pair search (1-lepton channel and all-hadronic channel) and the monojet analyses. We find that these searches are complementary depending on stop and higgsino masses: for a heavy stop the all-hadronic stop pair search provides the strongest bound, for an intermediate stop the inclusive SUSY analysis with alpha(T) variable is most efficient, while for a compressed stop-higgsino scenario the monojet search plays the key role. Finally, the lower mass bound on a stop is: (1) 320 GeV for compressed stop-higgsino scenario (mass splitting less than 20 GeV); (2) 765 (860) GeV for higgsinos lighter than 300 (100) GeV.

引用

页数：6