TY  - JOUR
AU  - Altavista, Chiara
AU  - Rey, Julián
TI  - Induced gravitational waves and baryon asymmetry fluctuations from primordial black hole formation
JO  - Journal of cosmology and astroparticle physics
VL  - 2024
IS  - 04
SN  - 1475-7516
CY  - London
PB  - IOP
M1  - PUBDB-2024-01561
M1  - arXiv:2309.14993
M1  - DESY-23-143
SP  - 052
PY  - 2024
N1  - 38 pages, 11 figures
AB  - We consider black hole formation due to the gravitational collapse produced by large density fluctuations during an epoch of reheating with a stiff equation of state and calculate the induced gravitational wave spectrum. By considering the existing bounds on the total energy density of gravitational waves today, we find constraints on the parameter space of this scenario. We also calculate the lepton asymmetry generated by metric perturbations via the chiral gravitational anomaly present in the Standard Model and find that, once the electroweak sphaleron processes have taken place, the large spectrum of scalar perturbations responsible for black hole formation induces a peak in the baryon asymmetry fluctuations on small scales.
KW  - black hole: formation (INSPIRE)
KW  - baryon: asymmetry (INSPIRE)
KW  - gravitational radiation: induced (INSPIRE)
KW  - metric: perturbation (INSPIRE)
KW  - gravitation: chiral (INSPIRE)
KW  - electroweak interaction: sphaleron (INSPIRE)
KW  - density: fluctuation (INSPIRE)
KW  - perturbation: scalar (INSPIRE)
KW  - spectrum: scalar (INSPIRE)
KW  - anomaly: gravitation (INSPIRE)
KW  - space-time: perturbation (INSPIRE)
KW  - energy: density (INSPIRE)
KW  - lepton: asymmetry (INSPIRE)
KW  - gravitation: collapse (INSPIRE)
KW  - gravitational radiation: spectrum (INSPIRE)
KW  - black hole: primordial (INSPIRE)
KW  - reheating (INSPIRE)
KW  - equation of state (INSPIRE)
KW  - baryon asymmetry (autogen)
KW  - inflation (autogen)
KW  - primordial black holes (autogen)
KW  - primordial gravitational waves (theory) (autogen)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001208765200004
DO  - DOI:10.1088/1475-7516/2024/04/052
UR  - https://bib-pubdb1.desy.de/record/605879
ER  -