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Title: Dark Matter's secret liaisons: phenomenology of a dark U(1) sector with bound states

Abstract

Dark matter (DM) charged under a dark U(1) force appears in many extensions of the Standard Model, and has been invoked to explain anomalies in cosmic-ray data, as well as a self-interacting DM candidate. In this paper, we perform a comprehensive phenomenological analysis of such a model, assuming that the DM abundance arises from the thermal freeze-out of the dark interactions. We include, for the first time, bound-state effects both in the DM production and in the indirect detection signals, and quantify their importance for FERMI, AMS-02, and CMB experiments. We find that DM in the mass range 1 GeV to 100 TeV, annihilating into dark photons of MeV to GeV mass, is in conflict with observations. Instead, DM annihilation into heavier dark photons is viable. We point out that the late decays of multi-GeV dark photons can produce significant entropy and thus dilute the DM density. This can lower considerably the dark coupling needed to obtain the DM abundance, and in turn relax the existing constraints.

Authors:
; ;  [1];  [2];  [3]
  1. Laboratoire de Physique Théorique et Hautes Energies (LPTHE), UMR 7589 CNRS and UPMC, 4 Place Jussieu, F-75252, Paris (France)
  2. CERN Theoretical Physics Department, CERN, Case C01600, CH-1211 Genève (Switzerland)
  3. Instituto de Física Teórica (IFT) UAM/CSIC, calle Nicolás Cabrera 13-15, 28049 Cantoblanco, Madrid (Spain)
Publication Date:
OSTI Identifier:
22676203
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 05; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; ANNIHILATION; BOUND STATE; COSMIC RADIATION; COUPLING; DENSITY; DETECTION; ENTROPY; GEV RANGE; MASS; MEV RANGE; NONLUMINOUS MATTER; PARTICLE DECAY; PHOTONS; RELICT RADIATION; STANDARD MODEL; TEV RANGE; U-1 GROUPS

Citation Formats

Cirelli, Marco, Petraki, Kalliopi, Sala, Filippo, Panci, Paolo, and Taoso, Marco, E-mail: marco.cirelli@gmail.com, E-mail: paolo.panci@cern.ch, E-mail: kpetraki@lpthe.jussieu.fr, E-mail: filo.sala@gmail.com, E-mail: m.taoso@csic.es. Dark Matter's secret liaisons: phenomenology of a dark U(1) sector with bound states. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/05/036.
Cirelli, Marco, Petraki, Kalliopi, Sala, Filippo, Panci, Paolo, & Taoso, Marco, E-mail: marco.cirelli@gmail.com, E-mail: paolo.panci@cern.ch, E-mail: kpetraki@lpthe.jussieu.fr, E-mail: filo.sala@gmail.com, E-mail: m.taoso@csic.es. Dark Matter's secret liaisons: phenomenology of a dark U(1) sector with bound states. United States. doi:10.1088/1475-7516/2017/05/036.
Cirelli, Marco, Petraki, Kalliopi, Sala, Filippo, Panci, Paolo, and Taoso, Marco, E-mail: marco.cirelli@gmail.com, E-mail: paolo.panci@cern.ch, E-mail: kpetraki@lpthe.jussieu.fr, E-mail: filo.sala@gmail.com, E-mail: m.taoso@csic.es. Mon . "Dark Matter's secret liaisons: phenomenology of a dark U(1) sector with bound states". United States. doi:10.1088/1475-7516/2017/05/036.
@article{osti_22676203,
title = {Dark Matter's secret liaisons: phenomenology of a dark U(1) sector with bound states},
author = {Cirelli, Marco and Petraki, Kalliopi and Sala, Filippo and Panci, Paolo and Taoso, Marco, E-mail: marco.cirelli@gmail.com, E-mail: paolo.panci@cern.ch, E-mail: kpetraki@lpthe.jussieu.fr, E-mail: filo.sala@gmail.com, E-mail: m.taoso@csic.es},
abstractNote = {Dark matter (DM) charged under a dark U(1) force appears in many extensions of the Standard Model, and has been invoked to explain anomalies in cosmic-ray data, as well as a self-interacting DM candidate. In this paper, we perform a comprehensive phenomenological analysis of such a model, assuming that the DM abundance arises from the thermal freeze-out of the dark interactions. We include, for the first time, bound-state effects both in the DM production and in the indirect detection signals, and quantify their importance for FERMI, AMS-02, and CMB experiments. We find that DM in the mass range 1 GeV to 100 TeV, annihilating into dark photons of MeV to GeV mass, is in conflict with observations. Instead, DM annihilation into heavier dark photons is viable. We point out that the late decays of multi-GeV dark photons can produce significant entropy and thus dilute the DM density. This can lower considerably the dark coupling needed to obtain the DM abundance, and in turn relax the existing constraints.},
doi = {10.1088/1475-7516/2017/05/036},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2017,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}
  • Recent data on e{sup +}/e{sup −} and p-bar cosmic rays suggest that dark matter annihilate into the standard model (SM) particles through new leptophilic interaction. In this paper, we consider a standard model extension with the gauged U(1){sub L{sub μ−L{sub τ}}} group, with a new Dirac fermion charged under this U(1) as a dark matter. We study the muon (g−2){sub μ}, thermal relic density of the cold dark matter, and the collider signatures of this model. Z{sup '} productions at the Tevatron or the LHC could be easily order of O(1)−O(10{sup 3}) fb.
  • Cosmic ray anomalies observed by PAMELA and Fermi-LAT experiments may be interpreted by heavy (TeV-scale) dark matter annihilation enhanced by Sommerfeld effects mediated by a very light (sub-GeV) U(1){sub X} gauge boson, while the recent direct searches from CoGeNT and DAMA/LIBRA experiments may indicate a rather light ( ∼ 7 GeV) dark matter with weak interaction. Motivated by these apparently different scales, we consider a gauge mediated next-to-the minimal supersymmetric standard model (NMSSM) entended with a light U(1){sub X} sector plus a heavy sector ( H-bar {sub h},H{sub h}), which can provide both a light ( ∼ 7 GeV) andmore » a heavy (TeV-scale) dark matter without introducing any ad hoc new scale. Through the Yukawa coupling between H{sub h} and the messager fields, the U(1){sub X} gauge symmetry is broken around the GeV scale radiatively and a large negative m{sub S}{sup 2} is generated for the NMSSM singlet S. Furthermore, the small kinetic mixing parameter between U(1){sub X} and U(1){sub Y} is predicted to be θ ∼ 10{sup −5}−10{sup −6} after integrating out the messengers. Such a light dark matter, which can have a normal relic density from the late decay of the right-handed sneutrino (assumed to be the ordinary next-to-the lightest supersymmetric particle and thermally produced in the early Universe), can serve a good candidate to explain the recent CoGeNT and DAMA/LIBRA results.« less
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