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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-46939

Beneke, M; Garbrecht, B; Herranen, M; Schwaller, P (2010). Finite number density corrections to leptogenesis. Nuclear Physics. Section B, 838(1-2):1-27.

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Abstract

We derive and solve kinetic equations for leptogenesis within the Closed Time Path (CTP) formalism. It is particularly emphasised how the procedure of real intermediate state subtraction familiar from the Boltzmann approach is realised within the CTP framework; and we show how in time-independent situations no lepton asymmetry emerges, in accordance with the CPT theorem. The CTP approach provides new quantum statistical corrections from evaluating the loop integrals. These lead to an enhancement of the asymmetry originating from the Bose statistics of the Higgs particles. To quantify this effect, we define and evaluate an effective CP-violating parameter. We also solve the kinetic equations and show explicitly that the new quantum statistical corrections can be neglected in the strong-washout regime, while, depending on initial conditions, they can be sizable for weak washout.

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44 citations in Web of Science®
45 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
DDC:530 Physics
Language:English
Date:2010
Deposited On:28 Feb 2011 16:25
Last Modified:20 Dec 2013 13:21
Publisher:Elsevier
ISSN:0550-3213
Publisher DOI:10.1016/j.nuclphysb.2010.05.003
Related URLs:http://arxiv.org/abs/1002.1326

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