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Measurement of two-photon decay width of χc2(1P) in γγ → χc2(1P) → J/ψγ at Belle

by Hsu, C.-L. , Borah, J. , Hayashii, H. , Sanuki, T. , Gaur, V. , Hayasaka, K. , Onuki, Y. , Yang, S. B. , Watanabe, M. , Kawasaki, T. , Stottler, Z. S. , Sumiyoshi, T. , Cinabro, D. , Chilikin, K. , Di Capua, F. , Kim, C. H. , Das, S. , Uchida, M. , Itoh, R. , Unno, Y. , Li, C. H. , Natkaniec, Z. , Yuan, C. Z. , Miyata, H. , De Pietro, G. , Sangal, A. , Dhamija, R. , Garmash, A. , Bozek, A. , Strube, J. F. , Uehara, S. , Zhai, Y. , Zhulanov, V. , Paul, S. , Oskin, P. , Kakuno, H. , Schwanda, C. , Kumar, M. , Patra, S. , Jang, E.-J. , Kumara, K. , Nishida, S. , Graziani, E. , Jacobs, W. W. , Podobnik, T. , Maurya, S. K. , Bilka, T. , Bhardwaj, V. , Kovalenko, E. , Križan, P. , Asner, D. M. , Konno, T. , Schueler, J. , Dingfelder, J. , Park, H. , Lee, S. C. , Tamponi, U. , Joo, K. K. , Pakhlova, G. , Senyo, K. , Chen, A. , Campajola, M. , Prencipe, E. , Cho, H. E. , Cho, K. , Mizuk, R. , Bennett, J. , Choi, S.-K. , Pedlar, T. K. , Singh, J. B. , Sumisawa, K. , Cheon, B. G. , Budano, A. , Watanuki, S. , Hadjivasiliou, C. , Ipsita, N. , Park, S.-H. , Ishikawa, A. , Pardi, S. , Sandilya, S. , Uno, S. , Li, Y. B. , Libby, J. , Nayak, M. , Sharma, C. , Yusa, Y. , Bessner, M. , Mussa, R. , Uglov, T. , Iwasaki, M. , Mrvar, M. , Piilonen, L. E. , Shen, C. P. , Varner, G

in Classical and Quantum Gravitation / Decay / e +-e − Experiments / e+e- experiments / Elementary Particles / High energy physics / Photons / Physics / Physics and Astronomy / Quantum Field Theories / Quantum Field Theory / Quantum Physics / Quarkonium / Regular Article - Experimental Physics / Relativity Theory / String Theory

2023

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Measurement of two-photon decay width of χc2(1P) in γγ → χc2(1P) → J/ψγ at Belle

2023

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Measurement of two-photon decay width of χc2(1P) in γγ → χc2(1P) → J/ψγ at Belle

2023

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Journal Article

Measurement of two-photon decay width of χc2(1P) in γγ → χc2(1P) → J/ψγ at Belle

Hsu, C.-L.,

Borah, J.,

Hayashii, H.,

Sanuki, T.,

Gaur, V.,

Hayasaka, K.,

Onuki, Y.,

Yang, S. B.,

Watanabe, M.,

Kawasaki, T.,

Stottler, Z. S.,

Sumiyoshi, T.,

Cinabro, D.,

Chilikin, K.,

Di Capua, F.,

Kim, C. H.,

Das, S.,

Uchida, M.,

Itoh, R.,

Unno, Y.,

Li, C. H.,

Natkaniec, Z.,

Yuan, C. Z.,

Miyata, H.,

De Pietro, G.,

Sangal, A.,

Dhamija, R.,

Garmash, A.,

Bozek, A.,

Strube, J. F.,

Uehara, S.,

Zhai, Y.,

Zhulanov, V.,

Paul, S.,

Oskin, P.,

Kakuno, H.,

Schwanda, C.,

Kumar, M.,

Patra, S.,

Jang, E.-J.,

Kumara, K.,

Nishida, S.,

Graziani, E.,

Jacobs, W. W.,

Podobnik, T.,

Maurya, S. K.,

Bilka, T.,

Bhardwaj, V.,

Kovalenko, E.,

Križan, P.,

Asner, D. M.,

Konno, T.,

Schueler, J.,

Dingfelder, J.,

Park, H.,

Lee, S. C.,

Tamponi, U.,

Joo, K. K.,

Pakhlova, G.,

Senyo, K.,

Chen, A.,

Campajola, M.,

Prencipe, E.,

Cho, H. E.,

Cho, K.,

Mizuk, R.,

Bennett, J.,

Choi, S.-K.,

Pedlar, T. K.,

Singh, J. B.,

Sumisawa, K.,

Cheon, B. G.,

Budano, A.,

Watanuki, S.,

Hadjivasiliou, C.,

Ipsita, N.,

Park, S.-H.,

Ishikawa, A.,

Pardi, S.,

Sandilya, S.,

Uno, S.,

Li, Y. B.,

Libby, J.,

Nayak, M.,

Sharma, C.,

Yusa, Y.,

Bessner, M.,

Mussa, R.,

Uglov, T.,

Iwasaki, M.,

Mrvar, M.,

Piilonen, L. E.,

Shen, C. P.,

Varner, G

2023

Overview

A bstract We report the measurement of the two-photon decay width of χ c 2 (1 P ) in two-photon processes at the Belle experiment. We analyze the process γγ → χ c 2 (1 P ) → J/ψγ , J/ψ → ℓ + ℓ − ( ℓ = e or μ ) using a data sample of 971 fb − 1 collected with the Belle detector at the KEKB e + e − collider. In this analysis, the product of the two-photon decay width of χ c 2 (1 P ) and the branching fraction is determined to be Γ γγ χ c 2 1 P B χ c 2 1 P → J / ψγ B J / ψ → ℓ + ℓ − = 14.8 ± 0.3 stat . ± 0.7 syst . eV, which corresponds to Γ γγ ( χ c 2 (1 P )) = 653 ± 13(stat.) ± 31(syst.) ± 17(B.R.) eV, where the third uncertainty is from B ( χ c 2 (1 P ) → J/ψγ ) and B ( J/ψ → ℓ + ℓ − ).

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Publisher

Springer Berlin Heidelberg,Springer Nature B.V,Springer Nature,SpringerOpen

Subject

Classical and Quantum Gravitation

/ Decay

/ e +-e − Experiments

/ e+e- experiments

/ Elementary Particles

/ High energy physics

/ Photons