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Dark Radiation in LARGE Volume Models

Abstract:

We consider reheating driven by volume modulus decays in the LARGE Volume Scenario. Such reheating always generates non-zero dark radiation through the decays to the axion partner, while the only competitive visible sector decays are Higgs pairs via the Giudice-Masiero term. In the framework of sequestered models where the cosmological moduli problem is absent, the simplest model with a shift-symmetric Higgs sector generates 1.56 < N_{eff} - N_{eff,SM} < 1.74. For more general cases, th...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevD.87.043520

Authors


Journal:
PHYSICAL REVIEW D
Volume:
87
Issue:
4
Publication date:
2012-08-17
DOI:
EISSN:
1550-2368
ISSN:
1550-7998
URN:
uuid:86cda62f-3a6a-4de0-af92-8df9aec157a1
Source identifiers:
349994
Local pid:
pubs:349994

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