Books&Papers[Theory Group] “Cosmological constraint on dark photon from Neff”

【Information】 Masahiro Ibe, Shin Kobayashi, Yuhei Nakayama, Satoshi Shirai,
“Cosmological constraint on dark photon from Neff”,
e-Print: ArXiv: 1912.12152[hep-ph]

【Date】 2019-12-27