5 papers · 1 filter
Can we live in a baby universe formed by a delayed first-order phase transition?
Qing-Hong Cao, Masanori Tanaka, Jun-Chen Wang +2
We examine the idea that our universe began as a baby universe and show that this is feasible in a gauged extension of the Standard Model with the classically conforma…
Berry phase in axion physics, SM global structure, and generalized symmetries
Qing-Hong Cao, Shuailiang Ge, Yandong Liu +1
We investigate the Berry phase arising from axion-photon and axion-fermion interactions. The effective Hamiltonians in both systems share the same form, enabling a unified descript…
Direct Detection and Cosmological Constraints of Dark Matter with Dark Dipoles
Takumi Kuwahara, Jun-Chen Wang, Shu-Run Yuan
We study a fermionic dark matter candidate that couples to the standard model particles exclusively through electric and magnetic dipole operators mediated by a massive dark photon…
Chiral phase transition with primordial black holes: Distinct phase structure and catalysis
Masanori Tanaka, Jun-Chen Wang, Jing-Jun Zhang
We study the impact of primordial black holes (PBHs) on the chiral phase transition and its associated stochastic gravitational-wave (GW) signals. Using the three-flavor Nambu-Jona…
First Constraint on Axion-Photon Coupling from Neutron Star Observations
Jun-Chen Wang, Shunshun Cao, Jinchen Jiang +3
We propose a novel method to detect axions which uniquely depends on the dimensionless axion-photon coupling , independent of the suppressive axion decay constant . Usin…