Towards a complete theory of thermal leptogenesis in the SM and MSSM

By G. Giudice, A. Notari, M. Raidal, A. Riotto, Alessandro Strumia. 2003

827 citations recorded by the source corpus.

Abstract We perform a thorough study of thermal leptogenesis adding finite temperature effects, RGE corrections, scatterings involving gauge bosons and by properly avoiding overcounting on-shell processes. Assuming hierarchical right-handed neutrinos with arbitrary abundancy, successful leptogenesis can be achieved if left-handed neutrinos are lighter than 0.15 eV and right-handed neutrinos heavier than 2×107 GeV (SM case, 3σ C.L.). MSSM results are similar. Furthermore, we study how reheating after inflation affects thermal leptogenesis. Assuming that the inflaton reheats SM particles but not directly right-handed neutrinos, we derive the lower bound on the reheating temperature to be TRH≳2×109 GeV. This bound conflicts with the cosmological gravitino bound present in supersymmetric theories. We study some scenarios that avoid this conflict: ‘soft leptogenesis’, leptogenesis in presence of a large right-handed (s)neutrino abundancy or of a sneutrino condensate.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/170144946e36de69a81147ba0dfe45b7a2f76259

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Alessandro Strumia
2. J. Redondo
3. A. Ringwald
4. G. Giudice
5. D. Bodeker
6. M. Raidal
7. K. Kannike
8. A. Salvio

In Nuclear and High Energy Physics

1. Alessandro Strumia
2. D. Bodeker
3. J. Redondo
4. G. Giudice
5. S. King
6. A. Ringwald
7. W. Buchmuller
8. K. Kannike

Citations in the corpus

• Baryogenesis from the weak scale to the grand unification scale (2020, methodology): “The original, widely used prescription given by Kolb and Wolfram (1980) and Harvey et al. (1982) turned out to be incorrect, as observed by Giudice et al. (2004).”
• Hot axions and the H0 tension (2018, methodology): “Once we compute the Lorentz invariant expression for the total cross section, the thermal average reads [59, 60]”
• Thermal production of ultrarelativistic right-handed neutrinos: complete leading-order results (2012, methodology): “However in the high temperature regime where the Higgs decay is allowed the spectrum (9)If one wants to compare the individual contributions of [14] with ours one has to be careful: In the present paper s- or t-channel refers to the fermion exchange, while in Ref.”
• Asymmetric dark matter from leptogenesis (2011, background): “[2, 3 ]). On the other hand, the baryon and DM energy densities are of the same order, DM= b 5, suggesting that they may have a common origin.”
• Dynamically induced Planck scale and inflation (2015, methodology): “It can generate the observed light neutrino masses via NLH Yukawa couplings [111] (in such a case MN <∼ 107 GeV in order to avoid an unnaturally large quantum correction to the Higgs mass [5–7, 112]) and it can provide baryogenesis via leptogenesis [113, 114].”
• Leptogenesis (2008, neutral): “Therefore, while the inclusion of the effects of the thermal motion of the decaying particle do modify the zero temperature results, these corrections are numerically small [43, 146] and generally negligible.”
• The cosmological Higgstory of the vacuum instability (2015, background): “The thermal corrections to the potential can be approximated as [56]”