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Dark matter, dark radiation and gravitational waves from mirror Higgs parity

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [1];  [2]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Princeton Univ., NJ (United States)
An exact parity replicates the Standard Model giving a Mirror Standard Model, SM SM'. This “Higgs Parity” and the mirror electroweak symmetry are spontaneously broken by the mirror Higgs, (H') = v' >> (H), yielding the Standard Model Higgs as a Pseudo-Nambu-Goldstone Boson of an approximate SU (4) symmetry, with a quartic coupling λSM(v') ~ 10-3. Mirror electromagnetism is unbroken and dark matter is composed of e' and \( {\overline{e}}^{\prime } \). Direct detection may be possible via the kinetic mixing portal, and in unified theories this rate is correlated with the proton decay rate. With a high reheat temperature after inflation, the et dark matter abundance is determined by freeze-out followed by dilution from decays of mirror neutrinos, ν'→ ℓH . Remarkably, this requires v'~ (108–1010) GeV, predicting a Higgs mass of 123 ± 3 GeV at 1σ and a Standard Model neutrino mass of (10-2–10-1) eV, consistent with observed neutrino masses. The mirror QCD sector exhibits a first order phase transition producing gravitational waves that may be detected by future observations. Mirror glueballs decay to mirror photons giving dark radiation with ΔNeff~ 0.03–0.4. With a low reheat temperature after inflation, the e' dark matter abundance is determined by freeze-in from the SM sector by either the Higgs or kinetic mixing portal.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231; SC0009988
OSTI ID:
1735537
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 2 Vol. 2020; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Freezing-in twin dark matter journal March 2020
A fresh look at the gravitational-wave signal from cosmological phase transitions journal March 2020
A fresh look at the gravitational-wave signal from cosmological phase transitions text January 2019

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