Topics of Particle, Astro and Cosmo Frontiers (TOPAC 2023)

Session

Axion

2 Jun 2023, 13:30

Tsung-Dao Lee Institute/S5F-S500 - Lecture Hall (Tsung-Dao Lee Institute)

Conveners

Axion

• Yuichiro Nakai
• Jun Gao

36. Axion Cavity at Quantum Level

Qiaoli Yang

02/06/2023, 13:30

Talk

We show that at the quantum level the single axion-photon conversion rate is enhanced by the cavity quality factor Q, and quantitatively larger than the classical result by a factor π/2. Thus, the axion cavity can be considered as a quantum device emitting single-photons with temporal separations. This differs from the classical picture in which axions transition in batches and the converted...

10. axion, magnetic monopole and detection of new axion couplings

Tong Li (Nankai University)

02/06/2023, 13:55

Talk

The Witten effect implies interaction between axion and magnetic monopole, and the quantum electromagnetodynamics (QEMD) properly describes electric charges, magnetic charges and photons. Based on the QEMD, a generic low-energy axion-photon effective field theory can be built. This generic axion-photon Lagrangian introduces the interactions between axion and two four-potentials, and leads to...

46. Millicharged particles from proton bremsstrahlung in the atmosphere

Prof. Zuowei Liu (Nanjing University)

02/06/2023, 14:20

Talk

Light millicharged particles can be copiously produced from meson decays in cosmic ray collisions with the atmosphere, leading to detectable signals in large underground neutrino detectors. In this paper we study a new channel to produce millicharged particles in the atmosphere, the proton bremsstrahlung process. We find that the proton bremsstrahlung channel can produce a much larger flux of...

12. GKZ hypergeometric systems of the three-loop vacuum Feynman integrals

Dr Zhang Hai-Bin (Hebei University)

02/06/2023, 14:45

Talk

We present the Gel'fand-Kapranov-Zelevinsky (GKZ) hypergeometric systems of the Feynman integrals of the three-loop vacuum diagrams with arbitrary masses, basing on Mellin-Barnes representations and Miller's transformation. The codimension of derived GKZ hypergeometric systems equals the number of independent dimensionless ratios among the virtual masses squared. Through GKZ hypergeometric...

82. QCD axion dark matter and the cosmic dipole problem

Chengcheng Han (Sun Yat-sen university)

Talk

QCD axion dark matter and the cosmic dipole problem