PreprintCC BY-NC-SA 4.0arXiv
Quantum Seesaw Cosmology: A Heating Phase from Pauli Blocking
Abstract
In Seesaw Cosmology, a scalar field reheats the Standard Model (SM) through right-handed neutrinos (RHNs), which generate tiny neutrino masses through the seesaw mechanism. When RHNs rapidly fill a restricted momentum-space region, expansion continually opens new fermionic states that are refilled by subsequent scalar decays, maintaining an approximately constant physical RHN density. This gives rise to a novel heating regime in which the SM temperature increases with the scale factor as T ∝ a+3/8, in sharp contrast to the conventional T ∝ a−3/8 scaling during matter-dominated reheating.
Related
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BibTeX
@misc{bernal2026quantum,
title = {{Quantum Seesaw Cosmology: A Heating Phase from Pauli Blocking}},
author = {Nicolás Bernal and Chee Sheng Fong},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.17681},
eprint = {2609.17681},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.17681},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Quantum Seesaw Cosmology: A Heating Phase from Pauli Blocking
AU - Nicolás Bernal
AU - Chee Sheng Fong
PY - 2026
DA - 2026/09/15
PB - arXiv
DO - 10.48550/arxiv.2609.17681
UR - https://arxiv.org/abs/2609.17681
AB - In Seesaw Cosmology, a scalar field reheats the Standard Model (SM) through right-handed neutrinos (RHNs), which generate tiny neutrino masses through the seesaw mechanism. When RHNs rapidly fill a restricted momentum-space region, expansion continually opens new fermionic states that are refilled by subsequent scalar decays, maintaining an approximately constant physical RHN density. This gives rise to a novel heating regime in which the SM temperature increases with the scale factor as T ∝ a^+3/8, in sharp contrast to the conventional T ∝ a^−3/8 scaling during matter-dominated reheating.
ER -