TY - JOUR
T1 - Wash-In Leptogenesis
AU - Domcke, Valerie
AU - Kamada, Kohei
AU - Mukaida, Kyohei
AU - Schmitz, Kai
AU - Yamada, Masaki
N1 - Funding Information:
We thank Apostolos Pilaftsis, Mikhail Shaposhnikov, and Daniele Teresi for helpful comments. K. K. was supported by JSPS KAKENHI, Grant-in-Aid for Scientific Research No. JP19K03842 and Grant-in-Aid for Scientific Research on Innovative Areas No. 19H04610. K. M. was supported by Deutsche Forschungsgemeinschaft under Germany's Excellence Strategy'EXC 2121 Quantum Universe'390833306. M. Y. was supported by the Leading Initiative for Excellent Young Researchers, Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, and by JSPS KAKENHI Grants No. 20H05851, No. 21K13910, and No. JP20K22344. This project has received funding from the European Union's Horizon 2020 Research and Innovation Program under Grant Agreement No. 796961, AxiBAU (K. S.).
Funding Information:
We thank Apostolos Pilaftsis, Mikhail Shaposhnikov, and Daniele Teresi for helpful comments. K. K. was supported by JSPS KAKENHI, Grant-in-Aid for Scientific Research No. JP19K03842 and Grant-in-Aid for Scientific Research on Innovative Areas No. 19H04610. K. M. was supported by Deutsche Forschungsgemeinschaft under Germany’s Excellence Strategy—EXC 2121 Quantum Universe—390833306. M. Y. was supported by the Leading Initiative for Excellent Young Researchers, Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, and by JSPS KAKENHI Grants No. 20H05851, No. 21K13910, and No. JP20K22344. This project has received funding from the European Union’s Horizon 2020 Research and Innovation Program under Grant Agreement No. 796961, “AxiBAU” (K. S.).
Publisher Copyright:
© 2021 authors.
PY - 2021/5/20
Y1 - 2021/5/20
N2 - We present a leptogenesis mechanism based on the standard type-I seesaw model that successfully operates at right-handed-neutrino masses as low as a few hundred TeV. This mechanism, which we dub wash-in leptogenesis, does not require any CP violation in the neutrino sector and can be implemented even in the regime of strong wash-out. The key idea behind wash-in leptogenesis is to generalize standard freeze-out leptogenesis to a nonminimal cosmological background in which the chemical potentials of all particles not in chemical equilibrium at the temperature of leptogenesis are allowed to take arbitrary values. This sets the stage for building a plethora of new baryogenesis models where chemical potentials generated at high temperatures are reprocessed to generate a nonvanishing B-L asymmetry at low temperatures. As concrete examples, we discuss wash-in leptogenesis after axion inflation and in the context of grand unification.
AB - We present a leptogenesis mechanism based on the standard type-I seesaw model that successfully operates at right-handed-neutrino masses as low as a few hundred TeV. This mechanism, which we dub wash-in leptogenesis, does not require any CP violation in the neutrino sector and can be implemented even in the regime of strong wash-out. The key idea behind wash-in leptogenesis is to generalize standard freeze-out leptogenesis to a nonminimal cosmological background in which the chemical potentials of all particles not in chemical equilibrium at the temperature of leptogenesis are allowed to take arbitrary values. This sets the stage for building a plethora of new baryogenesis models where chemical potentials generated at high temperatures are reprocessed to generate a nonvanishing B-L asymmetry at low temperatures. As concrete examples, we discuss wash-in leptogenesis after axion inflation and in the context of grand unification.
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U2 - 10.1103/PhysRevLett.126.201802
DO - 10.1103/PhysRevLett.126.201802
M3 - Article
C2 - 34110201
AN - SCOPUS:85106554235
SN - 0031-9007
VL - 126
JO - Physical Review Letters
JF - Physical Review Letters
IS - 20
M1 - 201802
ER -