The velocity peaks in the cold dark matter spectrum on Earth.pdfVIP

UFIFT-HEP-95-6, Fermilab-Pub-95/080-A The velocity peaks in the cold dark matter spectrum on Earth P. Sikivie1,2 , I. I. Tkachev3,4 and Yun Wang3 5 1 9 Physics Department, University of Florida, Gainesville, FL 32611 9 1 2Institute for Theoretical Physics, Santa Barbara, CA 93106 r p 3NASA/Fermilab Astrophysics Center, FNAL, Batavia, IL 60510 A 7 4 Institute for Nuclear Research, Russian Academy of Sciences, Moscow 117312, Russia 1 (April 13, 1995) 1 v 2 5 0 4 Abstract 0 5 9 / The cold dark matter spectrum on earth is expected to have peaks in velocity h p - space. We obtain estimates for the sizes and locations of these peaks. To this o r end we have generalized the secondary infall model of galactic halo formation t s a : to include angular momentum of the dark matter particles. This new model v i X is still spherically symmetric and it has self-similar solutions. Our results are r a relevant to direct dark matter search experiments. PACS numbers: 98.80.Cq, 95.35.+d, 14.80.Mz, 14.80.Ly Typeset using REVT X E 1 There is considerable evidence that galaxies are surrounded by dark halos which con- tribute 90% or more of the galactic mass [1]. Identifying the nature of the dark matter is the goal of considerable theoretical and experimental effort. The leading dark matter candidates are baryons, neutrinos, w