Cado, Y., Englert, C. , Modak, T. and Quiros, M. (2024) Baryogenesis in R2-Higgs inflation: The gravitational connection. Physical Review D, (Accepted for Publication)
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Abstract
R2 -Higgs inflation stands out as one of the best-fit models of Planck data. Using a covariant formalism for the inflationary dynamics and the production of helical gauge fields, we show that the observed baryon asymmetry of the Universe (BAU) can be obtained when this model is supplemented by a dimension-six CP-violating term ∼ (R/Λ 2 ) BµνBeµν in the hypercharge sector. At linear order, values of Λ ≃ 2.5×10−5 MP produce, in the R2 -like regime, sufficient helical hypermagnetic fields to create the observed matter-antimatter asymmetry during the electroweak crossover. However, the Schwinger effect of fermion pair production can play a critical role in this context, and that scale is significantly lowered when the backreaction of the fermion fields on the gauge field production is included. In all cases, the helical field configurations can remain robust against washout after the end of inflation
| Item Type: | Articles |
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| Additional Information: | YC acknowledges funding support from the Initiative Physique des Infinis (IPI), a research training program of the Idex SUPER at Sorbonne Universit´e. CE is supported by the UK Science and Technology Facilities Council (STFC) under grant ST/X000605/1 and the Leverhulme Trust under RPG-2021-031. TM is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under grant 396021762 — TRR 257: Particle Physics Phenomenology after the Higgs Discovery and Germany’s Excellence Strategy EXC 2181/1 — 390900948 (the Heidelberg STRUCTURES Excellence Cluster). The work of MQ is partly supported by Spanish MICIN under Grant PID2020-115845GB-I00, and by the Catalan Government under Grant 2021SGR00649. IFAE is partially funded by the CERCA program of the Generalitat de Catalunya. |
| Status: | Accepted for Publication |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Englert, Professor Christoph |
| Authors: | Cado, Y., Englert, C., Modak, T., and Quiros, M. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review D |
| Publisher: | American Physical Society |
| ISSN: | 2470-0010 |
| ISSN (Online): | 2470-0029 |
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