Higgs Parity, strong CP and dark matter

Journal Article · 03 July 2019 · Journal of High Energy Physics (Online)

DOI: https://doi.org/10.1007/JHEP07(2019)016 · OSTI ID:1596654

Dunsky, David ^[1]; Hall, Lawrence J. ^[1]; Harigaya, Keisuke ^[2]

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1. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Theoretical Physics Group
2. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Theoretical Physics Group; Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences

An exact spacetime parity replicates the $$SU(2) \times U(1)$$ electroweak interaction, the Higgs boson $$H$$, and the matter of the Standard Model. This "Higgs Parity" and the mirror electroweak symmetry are spontaneously broken at scale $$v' = \left\langle{H'} \right\rangle \gg \left\langle{H}\right\rangle$$, yielding the Standard Model below $v'$ with a quartic coupling that essentially vanishes at $v'$: $$\lambda_{SM}(v') \sim 10^{-3}$$. The strong CP problem is solved as Higgs parity forces the masses of mirror quarks and ordinary quarks to have opposite phases. Dark matter is composed of mirror electrons, $e'$, stabilized by unbroken mirror electromagnetism. These interact with Standard Model particles via kinetic mixing between the photon and the mirror photon, which arises at four-loop level and is a firm prediction of the theory. Physics below $v'$, including the mass and interaction of $e'$ dark matter, is described by $$\textit{one fewer parameter}$$ than in the Standard Model. The allowed range of $$m_{e'}$$ is determined by uncertainties in $$(\alpha_s, m_t, m_h)$$, so that future precision measurements of these will be correlated with the direct detection rate of $e'$ dark matter, which, together with the neutron electric dipole moment, will probe the entire parameter space.

• Research Organization: Institute for Advanced Study, Princeton, NJ (United States); University of California, Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
• Grant/Contract Number: SC0009988; AC02-05CH11231; PHY-1316783; PHY-1521446
• OSTI ID: 1596654
• Journal Information: Journal of High Energy Physics (Online), Vol. 2019, Issue 7; ISSN 1029-8479
• Publisher: Springer BerlinCopyright Statement
• Country of Publication: United States
• Language: English