Direct detection of supersymmetric dark matter and the role of the target nucleus spin

V. A. Bednyakov, H. V. Klapdor-Kleingrothaus, S. G. Kovalenko

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

75 Citas (Scopus)

Resumen

We investigate the role of nuclear spin in elastic scattering of dark matter (DM) neutralinos from nuclei in the framework of the minimal supersymmetric standard model (MSSM). The relative contribution of spin-dependent axial-vector and spin-independent scalar interactions to the event rate in a DM detector has been analyzed for various nuclei. Within general assumptions about the nuclear and nucleon structure we find that for nuclei with atomic weights A>50 the spin-independent part of the event rate RSI is larger than the spin-dependent one RSD in the domain of the MSSM parameter space allowed by the known experimental data and where the total event rate is R=RSD+RSI>0.01 events/(kg day). The latter condition reflects realistic sensitivities of present and near future DM detectors. Therefore we expect equal chances for discovering a DM event either with spin-zero or with spin-nonzero isotopes if their atomic weights are A1 A2>50. We discuss several examples of spin-nonzero nuclei (19F, Na23, Ge73, I127, Xe129) as a target material for DM detectors and compare their axial-vector couplings to the neutralino.

Idioma originalInglés
Páginas (desde-hasta)7128-7143
Número de páginas16
PublicaciónPhysical Review D
Volumen50
N.º12
DOI
EstadoPublicada - 1994
Publicado de forma externa

Áreas temáticas de ASJC Scopus

  • Física y astronomía (miscelánea)

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