Abstract
The baryon asymmetry of the Universe should have been produced after the inflation era. We consider the possibility that the asymmetry is generated by the flavor oscillations in the reheating process after inflation, so that the baryon asymmetry is realized already at the beginning of the radiation dominated era. In the seesaw model, we show that the propagators of the left-handed leptons generically have flavor mixings in the thermal background, that can generate flavor-dependent lepton asymmetry through the CP violation in the oscillation phenomena. The flavor dependent rates for the wash-out process can leave the net asymmetry today.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
G. ’t Hooft, Computation of the Quantum Effects Due to a Four-Dimensional Pseudoparticle, Phys. Rev. D 14 (1976) 3432 [Erratum ibid. D 18 (1978) 2199] [INSPIRE].
N.S. Manton, Topology in the Weinberg-Salam Theory, Phys. Rev. D 28 (1983) 2019 [INSPIRE].
F.R. Klinkhamer and N.S. Manton, A Saddle Point Solution in the Weinberg-Salam Theory, Phys. Rev. D 30 (1984) 2212 [INSPIRE].
V.A. Kuzmin, V.A. Rubakov and M.E. Shaposhnikov, On the Anomalous Electroweak Baryon Number Nonconservation in the Early Universe, Phys. Lett. B 155 (1985) 36 [INSPIRE].
M. Fukugita and T. Yanagida, Baryogenesis Without Grand Unification, Phys. Lett. B 174 (1986) 45 [INSPIRE].
W. Buchmüller, R.D. Peccei and T. Yanagida, Leptogenesis as the origin of matter, Ann. Rev. Nucl. Part. Sci. 55 (2005) 311 [hep-ph/0502169] [INSPIRE].
S. Davidson, E. Nardi and Y. Nir, Leptogenesis, Phys. Rept. 466 (2008) 105 [arXiv:0802.2962] [INSPIRE].
B. Garbrecht, Baryogenesis from Mixing of Lepton Doublets, Nucl. Phys. B 868 (2013) 557 [arXiv:1210.0553] [INSPIRE].
B. Garbrecht and I. Izaguirre, Phenomenology of Baryogenesis from Lepton-Doublet Mixing, Nucl. Phys. B 896 (2015) 412 [arXiv:1411.2834] [INSPIRE].
Y. Hamada and K. Kawana, Minimal leptogenesis, arXiv:1510.05186 [INSPIRE].
Y. Hamada, K. Tsumura and D. Yasuhara, The reheating era leptogenesis in models with seesaw mechanism, arXiv:1608.05256 [INSPIRE].
P. Minkowski, μ → eγ at a Rate of One Out of 109 Muon Decays?, Phys. Lett. B 67 (1977) 421 [INSPIRE].
T. Yanagida, Horizontal Symmetry And Masses Of Neutrinos, in proceedings of Workshop on Unified Theory and Baryon Number of the Universe, O. Sawada and A. Sugamoto eds., KEK, Tsukuba (1979) [INSPIRE].
M. Gell-Mann, P. Ramond and R. Slansky, Complex Spinors and Unified Theories, Conf. Proc. C 790927 (1979) 315 [arXiv:1306.4669] [INSPIRE].
S.L. Glashow, The Future of Elementary Particle Physics, NATO Sci. Ser. B 61 (1980) 687 [INSPIRE].
R.N. Mohapatra and G. Senjanović, Neutrino Mass and Spontaneous Parity Violation, Phys. Rev. Lett. 44 (1980) 912 [INSPIRE].
H.A. Weldon, Effective Fermion Masses of Order gT in High Temperature Gauge Theories with Exact Chiral Invariance, Phys. Rev. D 26 (1982) 2789 [INSPIRE].
B. Pontecorvo, Inverse beta processes and nonconservation of lepton charge, Sov. Phys. JETP 7 (1958) 172 [INSPIRE].
Z. Maki, M. Nakagawa and S. Sakata, Remarks on the unified model of elementary particles, Prog. Theor. Phys. 28 (1962) 870 [INSPIRE].
Particle Data Group collaboration, K.A. Olive et al., Review of Particle Physics, Chin. Phys. C 38 (2014) 090001 [INSPIRE].
N. Arkani-Hamed, J.L. Feng, L.J. Hall and H.-C. Cheng, CP violation from slepton oscillations at the LHC and NLC, Nucl. Phys. B 505 (1997) 3 [hep-ph/9704205] [INSPIRE].
J.M. Cline, K. Kainulainen and K.A. Olive, Protecting the primordial baryon asymmetry from erasure by sphalerons, Phys. Rev. D 49 (1994) 6394 [hep-ph/9401208] [INSPIRE].
A. Abada, S. Davidson, F.-X. Josse-Michaux, M. Losada and A. Riotto, Flavor issues in leptogenesis, JCAP 04 (2006) 004 [hep-ph/0601083] [INSPIRE].
E. Nardi, Y. Nir, E. Roulet and J. Racker, The importance of flavor in leptogenesis, JHEP 01 (2006) 164 [hep-ph/0601084] [INSPIRE].
A. Abada, S. Davidson, A. Ibarra, F.X. Josse-Michaux, M. Losada and A. Riotto, Flavour Matters in Leptogenesis, JHEP 09 (2006) 010 [hep-ph/0605281] [INSPIRE].
P.S. Bhupal Dev, P. Millington, A. Pilaftsis and D. Teresi, Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis, Nucl. Phys. B 886 (2014) 569 [arXiv:1404.1003] [INSPIRE].
P.I. Krastev and S.T. Petcov, Resonance Amplification and t Violation Effects in Three Neutrino Oscillations in the Earth, Phys. Lett. B 205 (1988) 84 [INSPIRE].
Planck collaboration, P.A.R. Ade et al., Planck 2015 results. XIII. Cosmological parameters, Astron. Astrophys. 594 (2016) A13 [arXiv:1502.01589] [INSPIRE].
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1609.05028
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Hamada, Y., Kitano, R. Primordial lepton oscillations and baryogenesis. J. High Energ. Phys. 2016, 10 (2016). https://doi.org/10.1007/JHEP11(2016)010
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP11(2016)010