Probing bino-wino coannihilation dark matter below the neutrino floor at the LHC

Guang Hua Duan; Ken Ichi Hikasa; Jie Ren; Lei Wu; Jin Min Yang

doi:10.1103/PhysRevD.98.015010

Probing bino-wino coannihilation dark matter below the neutrino floor at the LHC

Guang Hua Duan, Ken Ichi Hikasa, Jie Ren, Lei Wu, Jin Min Yang

Division for Interdisciplinary Advanced Research and Education (IARE)

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

In the minimal supersymmetric standard model (MSSM), the bino-wino coannihilation provides a feasible way to accommodate the observed cosmological dark matter (DM) relic density. However, such a scenario usually predicts a very small DM-nucleon scattering cross section that is below the neutrino floor, and can not be tested by DM direct detection experiments. In this work, we investigate the discovery potential of this bino-wino co-annihilation region by searching for the soft dilepton events from the process pp→χ20(→ χ10)χ1±+jets at the LHC. We find that the mass of the winolike χ20 can be probed up to about 310 (230) GeV at 2σ (5σ) level for an integrated luminosity L=300 fb-1. In the future HL-LHC with 3000 fb-1 luminosity, the corresponding mass limits can be pushed up to 430 (330) GeV.

Original language	English
Article number	015010
Journal	Physical Review D
Volume	98
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.98.015010
Publication status	Published - 2018 Jul 1

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10.1103/PhysRevD.98.015010

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title = "Probing bino-wino coannihilation dark matter below the neutrino floor at the LHC",

abstract = "In the minimal supersymmetric standard model (MSSM), the bino-wino coannihilation provides a feasible way to accommodate the observed cosmological dark matter (DM) relic density. However, such a scenario usually predicts a very small DM-nucleon scattering cross section that is below the neutrino floor, and can not be tested by DM direct detection experiments. In this work, we investigate the discovery potential of this bino-wino co-annihilation region by searching for the soft dilepton events from the process pp→χ20(→ χ10)χ1±+jets at the LHC. We find that the mass of the winolike χ20 can be probed up to about 310 (230) GeV at 2σ (5σ) level for an integrated luminosity L=300 fb-1. In the future HL-LHC with 3000 fb-1 luminosity, the corresponding mass limits can be pushed up to 430 (330) GeV.",

author = "Duan, {Guang Hua} and Hikasa, {Ken Ichi} and Jie Ren and Lei Wu and Yang, {Jin Min}",

note = "Funding Information: We thank Mariana Frank for helpful discussions. This work was supported by the National Natural Science Foundation of China (NNSFC) under Grants No. 11705093 and No. 11675242, by Peng-Huan-Wu Theoretical Physics Innovation Center (11747601), 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 of China under No. 2017YFA0402200-04. Publisher Copyright: {\textcopyright} 2018 authors. Published by the American Physical Society.",

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AU - Duan, Guang Hua

AU - Hikasa, Ken Ichi

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AU - Yang, Jin Min

N1 - Funding Information: We thank Mariana Frank for helpful discussions. This work was supported by the National Natural Science Foundation of China (NNSFC) under Grants No. 11705093 and No. 11675242, by Peng-Huan-Wu Theoretical Physics Innovation Center (11747601), 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 of China under No. 2017YFA0402200-04. Publisher Copyright: © 2018 authors. Published by the American Physical Society.

PY - 2018/7/1

Y1 - 2018/7/1

N2 - In the minimal supersymmetric standard model (MSSM), the bino-wino coannihilation provides a feasible way to accommodate the observed cosmological dark matter (DM) relic density. However, such a scenario usually predicts a very small DM-nucleon scattering cross section that is below the neutrino floor, and can not be tested by DM direct detection experiments. In this work, we investigate the discovery potential of this bino-wino co-annihilation region by searching for the soft dilepton events from the process pp→χ20(→ χ10)χ1±+jets at the LHC. We find that the mass of the winolike χ20 can be probed up to about 310 (230) GeV at 2σ (5σ) level for an integrated luminosity L=300 fb-1. In the future HL-LHC with 3000 fb-1 luminosity, the corresponding mass limits can be pushed up to 430 (330) GeV.

AB - In the minimal supersymmetric standard model (MSSM), the bino-wino coannihilation provides a feasible way to accommodate the observed cosmological dark matter (DM) relic density. However, such a scenario usually predicts a very small DM-nucleon scattering cross section that is below the neutrino floor, and can not be tested by DM direct detection experiments. In this work, we investigate the discovery potential of this bino-wino co-annihilation region by searching for the soft dilepton events from the process pp→χ20(→ χ10)χ1±+jets at the LHC. We find that the mass of the winolike χ20 can be probed up to about 310 (230) GeV at 2σ (5σ) level for an integrated luminosity L=300 fb-1. In the future HL-LHC with 3000 fb-1 luminosity, the corresponding mass limits can be pushed up to 430 (330) GeV.

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Probing bino-wino coannihilation dark matter below the neutrino floor at the LHC

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