Journal Article

Search for an axion-like particle in B → K()a(→ γγ) decays at Belle

Madaan, C., de Sangro, R., Di Canto, A., Hayashii, H., Lemettais, C., Chirapatpimol, K., Gaur, V., Zeng, F., Kinoshita, K., Chilikin, K., Praz, C., Gaudino, G., Hoppe, R., Mirra, M., Kim, Y. J., Natkaniec, Z., Gruberová, Z., Xu, X. P., De Pietro, G., Kindo, H., Fillinger, T., Bianchi, F., Li, C., Paul, S., Angelsmark, M., Sharma, G., Cui, J. X., Jang, E.-J., Kumara, K., Ghevondyan, G., Maurya, S. K., Bilka, T., Gobbo, B., Junkerkalefeld, H., Tiwary, R., Kovalenko, E., Jackson, P., Lyu, C., Dingfelder, J., Higuchi, T., Casarosa, G., Hernández Villanueva, M., Aversano, M., Giordano, R., Kojima, K., Peruzzi, I., Pakhlova, G., Senyo, K., Lewis, P. M., Svidras, H., Lalwani, K., Prencipe, E., Privalov, S., Baghel, N. K., Liao, Y. P., Pedlar, T. K., Singh, J. B., Sumisawa, K., Banerjee, Sw, Prell, S., Vitale, L., Marcantonio, D., Shan, W., McKenna, J. A., Bae, H., Biswas, D., Ipsita, N., Le Diberder, F. R., Pardi, S., Zhou, Q. D., Libby, J., Maiti, R., Nayak, M., Bessner, M., Lee, M. J., Kandra, J., Kuhr, T., Moser, H.-G., Vinokurova, A., Nakazawa, Y., Moreira de Carvalho, A. L., Cochran, J., Baur, A., Browder, T. E., Shtol, D., Giri, A., Bernlochner, F. U., Jin,

2025

Overview

A bstract We report a search for an axion-like particle a in B → K (*) a decays using data collected with the Belle detector at the KEKB asymmetric-energy electron-positron collider. The search is based on a 711 fb − 1 data sample collected at the Υ(4 S ) resonance energy, corresponding to a sample of 772 × 10 6 Υ(4 S ) events. In this study, we search for the decay of the axion-like particle into a pair of photons, a → γγ . We scan the two-photon invariant mass in the range 0 . 16 GeV–4 . 50 GeV for the K modes and 0 . 16 GeV–4 . 20 GeV for the K * modes. No significant signal is observed in any of the modes, and 90% confidence level upper limits are established on the coupling to the W boson, g aW , as a function of a mass. The limits range from 3 × 10 − 6 GeV − 1 to 3 × 10 − 5 GeV − 1 , improving the current constraints on g aW by a factor of two over the most stringent previous experimental results.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V,Springer Nature,SpringerOpen
• Subject: Atoms & subatomic particles / B Physics / Beyond Standard Model / Charged particles / Classical and Quantum Gravitation / Confidence intervals / e +-e − Experiments / Electron-positron accelerators / Elementary Particles / Hypothetical particles / Particle decay / Photons / Physics / Physics and Astronomy / Quantum Field Theories / Quantum Field Theory / Quantum Physics / Regular Article - Experimental Physics / Relativity Theory / Searching / Sensors / Simulation / String Theory