We report the first evidence for the hb(2P)→(1S)η transition with a significance of 3.5 standard deviations. The decay branching fraction is measured to be B[hb(2P)→(1S)η]=(7.1-3.2+3.7±0.8)×10-3, which is noticeably smaller than expected. We also set upper limits on π0 transitions of B[hb(2P)→(1S)π0]<1.8×10-3, and B[hb(1P)→(1S)π0]<1.8×10-3, at the 90% confidence level. These results are obtained with a 131.4 fb-1 data sample collected near the (5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.

Evidence of hb(2P)→(1S)η Decay and Search for hb(1P,2P)→(1S)π0 with the Belle Detector / Kovalenko, E., Adachi, I., Aihara, H., Asner, D.M., Aushev, T., Ayad, R., Babu, V., Banerjee, S., Belous, K., Bennett, J., Bessner, M., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Bondar, A., Bozek, A., Bracko, M., Branchini, P., Browder, T.E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 133:26(2024). [10.1103/PhysRevLett.133.261901]

Evidence of hb(2P)→(1S)η Decay and Search for hb(1P,2P)→(1S)π0 with the Belle Detector

Campajola M.;De Nardo G.;Di Capua F.;Merola M.;Pardi S.;
2024

Abstract

We report the first evidence for the hb(2P)→(1S)η transition with a significance of 3.5 standard deviations. The decay branching fraction is measured to be B[hb(2P)→(1S)η]=(7.1-3.2+3.7±0.8)×10-3, which is noticeably smaller than expected. We also set upper limits on π0 transitions of B[hb(2P)→(1S)π0]<1.8×10-3, and B[hb(1P)→(1S)π0]<1.8×10-3, at the 90% confidence level. These results are obtained with a 131.4 fb-1 data sample collected near the (5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.
2024
Evidence of hb(2P)→(1S)η Decay and Search for hb(1P,2P)→(1S)π0 with the Belle Detector / Kovalenko, E., Adachi, I., Aihara, H., Asner, D.M., Aushev, T., Ayad, R., Babu, V., Banerjee, S., Belous, K., Bennett, J., Bessner, M., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Bondar, A., Bozek, A., Bracko, M., Branchini, P., Browder, T.E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 133:26(2024). [10.1103/PhysRevLett.133.261901]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/1012062
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