3 papers
hep-ph2026
Parapositronium decay into three photons and implications for the neutral pion
Andrzej Czarnecki, Divyesh Dagia, Ting Gao +1
We complete the determination of the parapositronium decay into three photons by evaluating amplitudes mediated by the boson. We show that, contrary to the expectation that the…
gr-qc2025
Spin in Uniform Gravity, Hidden Momentum, and the Anomalous Hall Effect
Andrzej Czarnecki, Ting Gao
We review the recent discussion of the absence of spin Hall effect in a uniform gravitational field, pointing out differences from the anomalous spin Hall effect in ferromagnetics…
cond-mat.str-el2025
Triangular lattice models of the Kalmeyer-Laughlin spin liquid from coupled wires
Tingyu Gao, Niklas Tausendpfund, Erik L. Weerda +3
Chiral spin liquids (CSLs) are exotic phases of interacting spins in two dimensions, characterized by long-range entanglement and fractional excitations. We construct a local Hamil…