TY  - JOUR
AU  - Easa, H.
AU  - Gregoire, T.
AU  - Stolarski, D.
AU  - Cosme, C.
PY  - 2024
DA  - 2024//
TI  - Baryogenesis and dark matter in multiple hidden sectors
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 075003
EP  - 29pp
VL  - 109
IS  - 7
PB  - Amer Physical Soc
AB  - We explore a mechanism for producing the baryon asymmetry and dark matter in models with multiple hidden sectors that are Standard -Model -like but with varying Higgs mass parameters. If the field responsible for reheating the Standard Model and the exotic sectors carries an asymmetry, it can be converted into a baryon asymmetry using the standard sphaleron process. A hidden sector with positive Higgs mass squared can accommodate dark matter with its baryon asymmetry, and the larger abundance of dark matter relative to baryons is due to dark sphalerons being active all the way down the hidden sector QCD scale. This scenario predicts that dark matter is clustered in large dark nuclei and gives a lower bound on the effective relativistic degrees of freedom, Delta N eff greater than or similar to 0 .05 , which may be observable in the nextgeneration cosmic microwave background experiment CMB-S4.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2206.11314
UR  - https://doi.org/10.1103/PhysRevD.109.075003
DO  - 10.1103/PhysRevD.109.075003
LA  - English
N1  - WOS:001224349300001
ID  - Easa_etal2024
ER  -