TY - JOUR
T1 - Probing stops in the coannihilation region at the HL-LHC
T2 - A comparative study of different processes
AU - Duan, Guang Hua
AU - Fan, Xiang
AU - Hikasa, Ken ichi
AU - Peng, Bo
AU - Yang, Jin Min
N1 - Funding Information:
We thank Lei Wu and Yang Zhang for helpful discussions. This work was supported by the National Natural Science Foundation of China (NNSFC) under grant Nos. 11675242 , 11821505 , and 11851303 , by Peng-Huan-Wu Theoretical Physics Innovation Center ( 11847612 ), by the CAS Center for Excellence in Particle Physics (CCEPP), by the CAS Key Research Program of Frontier Sciences and by a Key R&D Program of Ministry of Science and Technology under number 2017YFA0402204 .
Funding Information:
We thank Lei Wu and Yang Zhang for helpful discussions. This work was supported by the National Natural Science Foundation of China (NNSFC) under grant Nos. 11675242, 11821505, and 11851303, by Peng-Huan-Wu Theoretical Physics Innovation Center (11847612), by the CAS Center for Excellence in Particle Physics (CCEPP), by the CAS Key Research Program of Frontier Sciences and by a Key R&D Program of Ministry of Science and Technology under number 2017YFA0402204.
Publisher Copyright:
© 2020 The Authors
PY - 2020/11/10
Y1 - 2020/11/10
N2 - In the minimal supersymmetric model, the coannihilation of the lighter stop t˜1 and bino-like dark matter χ provides a feasible way to accommodate the correct dark matter relic abundance. In this scenario, due to the compressed masses, t˜1 merely appears as missing energy at the LHC and thus the pair production of t˜1 can only be probed by requiring an associated energetic jet. Meanwhile, since t˜2 and b˜1 are correlated in mass and mixing with t˜1, the production of t˜2t˜2⁎ or b˜1b˜1⁎, each of which dominantly decays into t˜1 plus Z, h or W boson, may serve as a complementary probe. We examine all these processes at the HL-LHC and find that the 2σ sensitivity to χ mass can be as large as about 570 GeV, 600 GeV for mt˜2≲1100 GeV and 1.1 TeV for mb˜1≲1375 GeV from the production process of t˜1t˜1⁎+jet, t˜2t˜2⁎ and b˜1b˜1⁎, respectively.
AB - In the minimal supersymmetric model, the coannihilation of the lighter stop t˜1 and bino-like dark matter χ provides a feasible way to accommodate the correct dark matter relic abundance. In this scenario, due to the compressed masses, t˜1 merely appears as missing energy at the LHC and thus the pair production of t˜1 can only be probed by requiring an associated energetic jet. Meanwhile, since t˜2 and b˜1 are correlated in mass and mixing with t˜1, the production of t˜2t˜2⁎ or b˜1b˜1⁎, each of which dominantly decays into t˜1 plus Z, h or W boson, may serve as a complementary probe. We examine all these processes at the HL-LHC and find that the 2σ sensitivity to χ mass can be as large as about 570 GeV, 600 GeV for mt˜2≲1100 GeV and 1.1 TeV for mb˜1≲1375 GeV from the production process of t˜1t˜1⁎+jet, t˜2t˜2⁎ and b˜1b˜1⁎, respectively.
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U2 - 10.1016/j.physletb.2020.135800
DO - 10.1016/j.physletb.2020.135800
M3 - Article
AN - SCOPUS:85091510337
SN - 0370-2693
VL - 810
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 135800
ER -