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Scheme for the extraction of WIMP-nucleon scattering cross sections from total event rates

M. Cannoni1, J. D. Vergados2, and M. E. Gómez1

  • 1Departamento de Física Aplicada, Facultad de Ciencias Experimentales, Universidad de Huelva, 21071 Huelva, Spain
  • 2Theoretical Physics Division, University of Ioannina, Ioannina, Gr 451 10, Greece

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Phys. Rev. D 83, 075010 – Published 13 April, 2011

DOI: https://doi.org/10.1103/PhysRevD.83.075010

Abstract

We propose a scheme that allows to analytically determine the three elementary cross sections and connect the solutions to the relative sign between the proton and the neutron spin scattering amplitudes once the measurements of total event rate from three appropriate targets become available. In this way it is thus possible to extract the maximum information on the supersymmetric parameter space obtainable from direct detection experiments, in the case that the dark matter particle is the lightest neutralino. Our scheme is based on suitably normalized forms of the isospin momentum dependent structure functions entering in the spin-dependent elastic neutralino-nucleus cross section. We compare these functions with the commonly used ones and discuss their advantages: in particular, these allow in the spin-dependent cross section to factorize the particle physics degrees of freedom from the momentum transfer dependent nuclear structure functions as it happens in the spin-independent cross section with the nuclear form factor.

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Phys. Rev. D 83, 075010– Published 13 April, 2011
  • Received 23 November 2010

© 2011 American Physical Society

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