We present a new scenario for generating the baryon asymmetry of the Universe that is induced by a Nambu-Goldstone (NG) boson. The shift symmetry naturally controls the operators in the theory while allowing the NG boson to couple to the spacetime geometry as well as to the baryons. The cosmological background thus sources a coherent motion of the NG boson, which leads to baryogenesis. Good candidates of the baryon-generating NG boson are the QCD axion and axionlike fields. In these cases, the axion induces baryogenesis in the early Universe and can also serve as dark matter in the late Universe. © 2017 American Physical Society.

Geometric Baryogenesis from Shift Symmetry / De Simone, Andrea; Kobayashi, Takeshi; Liberati, Stefano. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 118:13(2017), pp. 1-5. [10.1103/PhysRevLett.118.131101]

Geometric Baryogenesis from Shift Symmetry

De Simone, Andrea
;
KOBAYASHI, Takeshi;Liberati, Stefano
2017-01-01

Abstract

We present a new scenario for generating the baryon asymmetry of the Universe that is induced by a Nambu-Goldstone (NG) boson. The shift symmetry naturally controls the operators in the theory while allowing the NG boson to couple to the spacetime geometry as well as to the baryons. The cosmological background thus sources a coherent motion of the NG boson, which leads to baryogenesis. Good candidates of the baryon-generating NG boson are the QCD axion and axionlike fields. In these cases, the axion induces baryogenesis in the early Universe and can also serve as dark matter in the late Universe. © 2017 American Physical Society.
2017
118
13
1
5
131101
https://arxiv.org/abs/1612.04824
http://cdsads.u-strasbg.fr/abs/2017PhRvL.118m1101D
De Simone, Andrea; Kobayashi, Takeshi; Liberati, Stefano
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/48269
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