Bogdan A Dobrescu et al JCAP10(2007)012 doi:10.1088/1475-7516/2007/10/012
Spinless photon dark matter from two universal extra dimensions
Bogdan A Dobrescu1, Dan Hooper2, Kyoungchul Kong1 and Rakhi Mahbubani1
Show affiliationsWe explore the properties of dark matter in theories with two universal extra dimensions, where the lightest Kaluza–Klein state is a spin-0 neutral particle, representing a six-dimensional photon polarized along the extra dimensions. Annihilation of this 'spinless photon' proceeds predominantly through Higgs boson exchange, and is largely independent of other Kaluza–Klein particles. The measured relic abundance sets an upper limit on the spinless photon mass of 500 GeV, which decreases to almost 200 GeV if the Higgs boson is light. The phenomenology of this dark matter candidate is strikingly different from Kaluza–Klein dark matter in theories with one universal extra dimension. Elastic scattering of the spinless photon with quarks is helicity suppressed, making its direct detection challenging, although possible at upcoming experiments. The prospects for indirect detection with gamma rays and antimatter are similar to those of neutralinos. The rates predicted at neutrino telescopes are below the sensitivity of next-generation experiments.
- Keywords
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cosmology with extra dimensions
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E-print Number: 0706.3409
Cited: by |
Refers: to
- PACS
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95.35.+d Dark matter (stellar, interstellar, galactic, and cosmological)
04.50.-h Higher-dimensional gravity and other theories of gravity
14.80.Bn Standard-model Higgs bosons
11.30.Er Charge conjugation, parity, time reversal, and other discrete symmetries
- Subjects
- Dates
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Issue 10 (October 2007)
Received 3 July 2007, accepted for publication 24 September 2007
Published 18 October 2007
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Spinless photon dark matter from two universal extra dimensions
Bogdan A Dobrescu et al JCAP10(2007)012
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