PAPER / ARXIV:2609.08144
Jiwon Lee , Jinsu Kim , Ohjoon Kwon , Saebyeok Ahn , Seonjeong Oh , Sergey Uchaikin , Boris Ivanov , Arjan Ferdinand van Loo , Yasunobu Nakamura , Dojun Youm , SungWoo Youn , HyoungSoon Choi
RESUMO
We report an axion dark matter search in the mass range of $15.30\text{--}15.85\,\mu\text{eV}$ using a broadly tunable high-temperature superconducting (HTS) haloscope. By soldering substrate-stripped rare-earth barium copper oxide (REBCO) films onto a copper shell, we achieved a quality factor 3--4 times higher than in copper cavities across its tuning band in an 8\text{-T} magnetic field. We set robust Frequentist 90\%~confidence-level exclusion limits on the axion--photon coupling down to 1.3 times the KSVZ coupling, while a complementary Bayesian analysis achieves KSVZ-level sensitivity.
NO MESMO MAPA