2026/07/31 by TEXONO Collaboration, Greeshma C., L. Singh +22
Physics and Astronomy · #hep-ex
11 pages, 11 figures
arxiv created 2026/07/31 · arxiv updated 2026/08/03
We present results of a search for Axion-Like Particles (ALPs) produced via Primakoff and Compton-like scattering channels, using data acquired with TEXONO experiment at the Kuo-Sheng Nuclear Power Station. The analysis is based on 278.91 days of reactor-ON and 43.60 days of reactor-OFF data. These datasets were collected using a 1.06 kg high-purity germanium detector located 28 m from a 2.9 GW reactor core. No significant excess is observed in the residual spectrum from the reactor-ON and reactor-OFF data subtraction. Using data acquired with low-background germanium detectors, upper limits on both the ALP-photon (gaγγ) and ALP-electron (gaee) couplings are derived for ALP masses ranging from 1 eV to 3 MeV at 90% confidence level. Since both gaγγ and gaee couplings contribute to ALP production and detection, a combined analysis is performed by treating both channels as active parameters.