Alignment without decoupling: The portal to light dark matter in the MSSM

Profumo, Stefano; Stefaniak, Tim

doi:10.1103/physrevd.94.095020

Title: Alignment without decoupling: The portal to light dark matter in the MSSM

Journal Article · Fri Nov 18 00:00:00 EST 2016 · Physical Review. D.

DOI:https://doi.org/10.1103/physrevd.94.095020· OSTI ID:1536166

Profumo, Stefano ^[1]; Stefaniak, Tim ^[1]

University of California, Santa Cruz, CA (United States). Santa Cruz Institute for Particle Physics

Here we study light, thermal neutralino dark matter in the sub-GeV to ~65 GeV mass range in the minimal supersymmetric extension of the Standard Model. We consider realizations of the limit of alignment without decoupling in the Higgs sector where the heavier CP-even Higgs impersonates the observed Higgs state at 125 GeV, while the lighter CP-even Higgs is the mediator of dark matter annihilation. We single out three distinct and novel possibilities for light dark matter: (i) a neutralino with mass around half the light Higgs mass, in the sub-GeV to ~30 GeV mass range; (ii) a neutralino with a mass around half the pseudoscalar Higgs boson mass, in our examples around (60 – 65) GeV; (iii) a very light neutralino with mass around the light Higgs mass, pair annihilating to Higgs pairs. We discuss the implications of all these possibilities for indirect and direct dark matter detection experiments, and we demonstrate that all scenarios will be tested by next generation direct detection experiments. We also emphasize that the unique Higgs phenomenology of this setup warrants a dedicated search program at the LHC.

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Research Organization:: Univ. of California, Santa Cruz, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Alexander von Humboldt-Foundation

Grant/Contract Number:: SC0010107; SC0010107-001

OSTI ID:: 1536166

Alternate ID(s):: OSTI ID: 1332780

Journal Information:: Physical Review. D., Vol. 94, Issue 9; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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