Direct detection of nonchiral dark matter

Journal Article · Tue Jul 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.015004· OSTI ID:21250258

Essig, Rouven ^[1]

---

1. NHETC, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854 (United States)

Direct detection experiments rule out fermion dark matter that is a chiral representation of the electroweak gauge group. Nonchiral real, complex and singlet representations, however, provide viable fermion dark-matter candidates. Although any one of these candidates will be virtually impossible to detect at the LHC, it is shown that they may be detected at future planned direct detection experiments. For the real case, an irreducible radiative coupling to quarks may allow a detection. The complex case in general has an experimentally ruled out tree-level coupling to quarks via Z-boson exchange. However, in the case of two SU(2){sub L} doublets, a higher-dimensional coupling to the Higgs can suppress this coupling, and a remaining irreducible radiative coupling may allow a detection. Singlet dark matter could be detected through a coupling to quarks via Higgs exchange. Since all nonchiral dark matter can have a coupling to the Higgs, at least some of its mass can be obtained from electroweak symmetry breaking, and this mass is a useful characterization of its direct detection cross section.

• OSTI ID: 21250258
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERN LHC
CHIRALITY
COUPLING
CROSS SECTIONS
DETECTION
FERMIONS
HIGGS BOSONS
HIGGS MODEL
MASS
NONLUMINOUS MATTER
QUARKS
SU-2 GROUPS
SYMMETRY BREAKING
Z NEUTRAL BOSONS