A portalino to the dark sector
Abstract
“Portal” models that connect the Standard Model to a Dark Sector allow for a wide variety of scenarios beyond the simplest WIMP models. Kinetic mixing of gauge fields in particular has allowed a broad range of new ideas. However, the models that evade CMB constraints are often non-generic, with new mass scales and operators to split states and suppress indirect detection signals. Models with a “portalino”, a neutral fermion that marries a linear combination of a standard model neutrino and dark sector fermion and carries a conserved quantum number, can be simpler. This is especially interesting for interacting dark sectors; then the unmarried linear combination which we identify as the standard model neutrino inherits these interactions too, and provides a new, effective interaction between the dark sector and the standard model. These interactions can be simple Z' type interactions or lepton-flavor changing. Dark matter freezes out into neutrinos, thereby evading CMB constraints, and conventional direct detection signals are largely absent. The model offers different signals, however. The “portalino” mechanism itself predicts small corrections to the standard model neutrino couplings as well as the possibility of discovering the portalino particle in collider experiments. Possible cosmological and astroparticle signatures include monochromatic neutrinomore »
- Authors:
-
- Boston Univ., MA (United States)
- New York Univ., NY (United States)
- Publication Date:
- Research Org.:
- Boston Univ., MA (United States)
- Sponsoring Org.:
- National Science Foundation (NSF); USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1612331
- Alternate Identifier(s):
- OSTI ID: 1833194
- Grant/Contract Number:
- SC0015845; PHY-1620727; PHY-1607761
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2019; Journal Issue: 2; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; physics; neutrino physics; cosmology of theories beyond the SM; Beyond Standard Model
Citation Formats
Schmaltz, Martin, and Weiner, Neal. A portalino to the dark sector. United States: N. p., 2019.
Web. doi:10.1007/jhep02(2019)105.
Schmaltz, Martin, & Weiner, Neal. A portalino to the dark sector. United States. https://doi.org/10.1007/jhep02(2019)105
Schmaltz, Martin, and Weiner, Neal. Fri .
"A portalino to the dark sector". United States. https://doi.org/10.1007/jhep02(2019)105. https://www.osti.gov/servlets/purl/1612331.
@article{osti_1612331,
title = {A portalino to the dark sector},
author = {Schmaltz, Martin and Weiner, Neal},
abstractNote = {“Portal” models that connect the Standard Model to a Dark Sector allow for a wide variety of scenarios beyond the simplest WIMP models. Kinetic mixing of gauge fields in particular has allowed a broad range of new ideas. However, the models that evade CMB constraints are often non-generic, with new mass scales and operators to split states and suppress indirect detection signals. Models with a “portalino”, a neutral fermion that marries a linear combination of a standard model neutrino and dark sector fermion and carries a conserved quantum number, can be simpler. This is especially interesting for interacting dark sectors; then the unmarried linear combination which we identify as the standard model neutrino inherits these interactions too, and provides a new, effective interaction between the dark sector and the standard model. These interactions can be simple Z' type interactions or lepton-flavor changing. Dark matter freezes out into neutrinos, thereby evading CMB constraints, and conventional direct detection signals are largely absent. The model offers different signals, however. The “portalino” mechanism itself predicts small corrections to the standard model neutrino couplings as well as the possibility of discovering the portalino particle in collider experiments. Possible cosmological and astroparticle signatures include monochromatic neutrino signals from annihilation, spectral features in high energy CR neutrinos as well as conventional signals of additional light species and dark matter interactions.},
doi = {10.1007/jhep02(2019)105},
journal = {Journal of High Energy Physics (Online)},
number = 2,
volume = 2019,
place = {United States},
year = {Fri Feb 15 00:00:00 EST 2019},
month = {Fri Feb 15 00:00:00 EST 2019}
}
Web of Science
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