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9. Study of the processes χcJ→ Ξ−Ξ¯Ξ¯+ and Ξ0Ξ¯Ξ¯0

Author

Ablikim, M., Achasov, M.N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., Amoroso, A., An, M.R., An, Q., Bai, X.H., Bai, Y., Bakina, O., Baldini Ferroli, R., Balossino, I., Ban, Y., Begzsuren, K., Berger, N., Bertani, M., Bettoni, D., Bianchi, F., Bloms, J., Bortone, A., Boyko, I., Briere, R.A., Cai, H., Cai, X., Calcaterra, A., Cao, G.F., Cao, N., Cetin, S.A., Chang, J.F., Chang, W.L., Chelkov, G., Chen, D.Y., Chen, G., Chen, H.S., Chen, M.L., Chen, S.J., Chen, X.R., Chen, Y.B., Chen, Z. J, Cheng, W.S., Cibinetto, G., Cossio, F., Cui, X.F., Dai, H.L., Dai, X.C., Dbeyssi, A., de Boer, R.E., Dedovich, D., Deng, Z.Y., Denig, A., Denysenko, I., Destefanis, M., De Mori, F., Ding, Y., Dong, C., Dong, J., Dong, L.Y., Dong, M.Y., Dong, X., Du, S.X., Fan, Y.L., Fang, J., Fang, S.S., Fang, Y., Farinelli, R., Fava, L., Feldbauer, F., Felici, G., Feng, C.Q., Feng, J.H., Fritsch, M., Fu, C.D., Gao, Y., Gao, Y., Gao, Y.G., Garzia, I., Ge, P.T., Geng, C., Gersabeck, E.M., Gilman, A, Goetzen, K., Gong, L., Gong, W.X., Gradl, W., Greco, M., Gu, L.M., Gu, M.H., Guan, C. Y, Guo, A.Q., Guo, A.Q., Guo, L.B., Guo, R.P., Guo, Y.P., Guskov, A., Han, T.T., Han, W.Y., Hao, X.Q., Harris, F.A., He, K.L., Heinsius, F.H., Heinz, C.H., Heng, Y.K., Herold, C., Himmelreich, M., Holtmann, T., Hou, G.Y., Hou, Y.R., Hou, Z.L., Hu, H.M., Hu, J.F., Hu, T., Hu, Y., Huang, G.S., Huang, L.Q., Huang, X.T., Huang, Y.P., Huang, Z., Hussain, T., Hüsken, N, Ikegami Andersson, W., Imoehl, W., Irshad, M., Jaeger, S., Janchiv, S., Ji, Q., Ji, Q.P., Ji, X.B., Ji, X.L., Ji, Y.Y., Jiang, H.B., Jiang, X.S., Jiao, J.B., Jiao, Z., Jin, S., Jin, Y., Jing, M.Q., Johansson, T., Kalantar-Nayestanaki, N., Kang, X.S., Kappert, R., Kavatsyuk, M., Ke, B.C., Keshk, I.K., Khoukaz, A., Kiese, P., Kiuchi, R., Kliemt, R., Koch, L., Kolcu, O.B., Kopf, B., Kuemmel, M., Kuessner, M., Kupsc, A., Kurth, M.G., Kühn, W., Lane, J.J., Lange, J.S., Larin, P., Lavania, A., Lavezzi, L., Lei, Z.H., Leithoff, H., Lellmann, M., Lenz, T., Li, C., Li, C.H., Li, Cheng, Li, D.M., Li, F., Li, G., Li, H., Li, H., Li, H.B., Li, H.J., Li, H.N., Li, J.L., Li, J.Q., Li, J.S., Li, Ke, Li, L.K., Li, Lei, Li, P.R., Li, S.Y., Li, W.D., Li, W.G., Li, X.H., Li, X.L., Li, Xiaoyu, Li, Z.Y., Liang, H., Liang, H., Liang, H., Liang, Y.F., Liang, Y.T., Liao, G.R., Liao, L.Z., Libby, J., Lin, C.X., Lin, D.X., Lin, T., Liu, B.J., Liu, C.X., Liu, D., Liu, F.H., Liu, Fang, Liu, Feng, Liu, G.M., Liu, H.M., Liu, Huanhuan, Liu, Huihui, Liu, J.B., Liu, J.L., Liu, J.Y., Liu, K., Liu, K.Y., Liu, Ke, Liu, L., Liu, M.H., Liu, P.L., Liu, Q., Liu, Q., Liu, S.B., Liu, T., Liu, W.M., Liu, X., Liu, Y., Liu, Y.B., Liu, Z.A., Liu, Z.Q., Lou, X.C., Lu, F.X., Lu, H.J., Lu, J.D., Lu, J.G., Lu, X.L., Lu, Y., Lu, Y.P., Luo, C.L., Luo, M.X., Luo, P.W., Luo, T., Luo, X.L., Lyu, X.R., Ma, F.C., Ma, H.L., Ma, L.L., Ma, M.M., Ma, Q.M., Ma, R.Q., Ma, R.T., Ma, X.X., Ma, X.Y., Maas, F.E., Maggiora, M., Maldaner, S., Malde, S., Malik, Q.A., Mangoni, A., Mao, Y.J., Mao, Z.P., Marcello, S., Meng, Z.X., Messchendorp, J.G., Mezzadri, G., Min, T.J., Mitchell, R.E., Mo, X.H., Muchnoi, N. Yu., Muramatsu, H., Nakhoul, S., Nefedov, Y., Nerling, F., Nikolaev, I.B., Ning, Z., Nisar, S., Ouyang, Q., Pacetti, S., Pan, X., Pan, Y., Pathak, A., Pathak, A., Patteri, P., Pelizaeus, M., Peng, H.P., Peters, K., Pettersson, J., Ping, J.L., Ping, R.G., Pogodin, S., Poling, R., Prasad, V., Qi, H., Qi, H.R., Qi, M., Qi, T.Y., Qian, S., Qian, W.B., Qian, Z., Qiao, C.F., Qin, J.J., Qin, L.Q., Qin, X.P., Qin, X.S., Qin, Z.H., Qiu, J.F., Qu, S.Q., Rashid, K.H., Ravindran, K., Redmer, C.F., Rivetti, A., Rodin, V., Rolo, M., Rong, G., Rosner, Ch., Rump, M., Sang, H.S., Sarantsev, A., Schelhaas, Y., Schnier, C., Schoenning, K., Scodeggio, M., Shan, W., Shan, X.Y., Shangguan, J.F., Shao, M., Shen, C.P., Shen, H.F., Shen, X.Y., Shi, H.C., Shi, R.S., Shi, X., Shi, X. D, Song, J.J., Song, J.J., Song, W.M., Song, Y.X., Sosio, S., Spataro, S., Su, K.X., Su, P.P., Sui, F.F., Sun, G.X., Sun, H.K., Sun, J.F., Sun, L., Sun, S.S., Sun, T., Sun, W.Y., Sun, X, Sun, Y.J., Sun, Y.Z., Sun, Z.T., Tan, Y.H., Tan, Y.X., Tang, C.J., Tang, G.Y., Tang, J., Teng, J.X., Thoren, V., Tian, W.H., Tian, Y.T., Uman, I., Wang, B., Wang, C.W., Wang, D.Y., Wang, H.J., Wang, H.P., Wang, K., Wang, L.L., Wang, M., Wang, M.Z., Wang, Meng, Wang, S., Wang, W., Wang, W.H., Wang, W.P., Wang, X., Wang, X.F., Wang, X.L., Wang, Y., Wang, Y.D., Wang, Y.F., Wang, Y.Q., Wang, Y.Y., Wang, Z., Wang, Z.Y., Wang, Ziyi, Wang, Zongyuan, Wei, D.H., Weidner, F., Wen, S.P., White, D.J., Wiedner, U., Wilkinson, G., Wolke, M., Wollenberg, L., Wu, J.F., Wu, L.H., Wu, L.J., Wu, X., Wu, X.H., Wu, Z., Xia, L., Xiao, H., Xiao, S.Y., Xiao, Z.J., Xie, X.H., Xie, Y.G., Xie, Y.H., Xing, T.Y., Xu, C.J., Xu, G.F., Xu, Q.J., Xu, W., Xu, X.P., Xu, Y.C., Yan, F., Yan, L., Yan, W.B., Yan, W.C., Yang, H.J., Yang, H.X., Yang, L., Yang, S.L., Yang, Y.X., Yang, Yifan, Yang, Zhi, Ye, M., Ye, M.H., Yin, J.H., You, Z.Y., Yu, B.X., Yu, C.X., Yu, G., Yu, J.S., Yu, T., Yuan, C.Z., Yuan, L., Yuan, X.Q., Yuan, Y., Yuan, Z.Y., Yue, C.X., Zafar, A.A., Zeng, X., Zeng, Y., Zhang, A.Q., Zhang, B.X., Zhang, Guangyi, Zhang, H., Zhang, H.H., Zhang, H.H., Zhang, H.Y., Zhang, J.J., Zhang, J.L., Zhang, J.Q., Zhang, J.W., Zhang, J.Y., Zhang, J.Z., Zhang, Jianyu, Zhang, Jiawei, Zhang, L.M., Zhang, L.Q., Zhang, Lei, Zhang, S., Zhang, S.F., Zhang, Shulei, Zhang, X.D., Zhang, X.Y., Zhang, Y., Zhang, Y.T., Zhang, Y.H., Zhang, Yan, Zhang, Yao, Zhang, Z.Y., Zhao, G., Zhao, J., Zhao, J.Y., Zhao, J.Z., Zhao, Lei, Zhao, Ling, Zhao, M.G., Zhao, Q., Zhao, S.J., Zhao, Y.B., Zhao, Y.X., Zhao, Z.G., Zhemchugov, A., Zheng, B., Zheng, J.P., Zheng, Y.H., Zhong, B., Zhong, C., Zhou, L.P., Zhou, Q., Zhou, X., Zhou, X.K., Zhou, X.R., Zhou, X.Y., Zhu, A.N., Zhu, J., Zhu, K., Zhu, K.J., Zhu, S.H., Zhu, T.J., Zhu, W.J., Zhu, W.J., Zhu, Y.C., Zhu, Z.A., Zou, B.S., and Zou, J.H.

Published
2022
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12. Measurement of the real dielectric permittivity ϵr of glacial ice

Author

Allison, P., Archambault, S., Auffenberg, J., Bard, R., Beatty, J.J., Beheler-Amass, M., Besson, D.Z., Beydler, M., Chen, C.C., Chen, C.H., Chen, P., Christenson, A., Clark, B.A., Connolly, A., Cremonesi, L., Deaconu, C., Duvernois, M., Friedman, L., Gaior, R., Hanson, J., Hanson, K., Haugen, J., Hoffman, K.D., Hong, E., Hsu, S.Y., Hu, L., Huang, J.J., Huang, M.-H.A., Ishihara, A., Karle, A., Kelley, J.L., Khandelwal, R., Kim, M.-C., Kravchenko, I., Kruse, J., Kurusu, K., Kuwabara, T., Landsman, H., Latif, U.A., Laundrie, A., Li, C.-J., Liu, T.-C., Lu, M.-Y., Mase, K., Meures, T., Nam, J., Nichol, R.J., Nir, G., Novikov, A., Oberla, E., O’ Murchadha, A., Pan, Y., Pfendner, C., Ratzlaff, K., Relich, M., Roth, J., Sandstrom, P., Seckel, D., Shiao, Y.S., Shultz, A., Song, M., Touart, J., Varner, G.S., Vieregg, A., Wang, M.Z., Wang, S.H., Wissel, S., Yoshida, S., and Young, R.

Published
2019
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15. Study of the muon decay-in-flight in the <math><msup><mi>τ</mi><mo>−</mo></msup><mo>→</mo><msup><mi>μ</mi><mo>−</mo></msup><msub><mover><mi>ν</mi><mo>¯</mo></mover><mi>μ</mi></msub><msub><mi>ν</mi><mi>τ</mi></msub></math> decay to measure the Michel parameter <math><msup><mi>ξ</mi><mo>′</mo></msup></math>

Author

Bodrov, D., Pakhlov, P., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Banerjee, Sw., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Biswas, D., Bobrov, A., Bondar, A., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Cheon, B. G., Chilikin, K., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B. G., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Greenwald, D., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Halder, S., Hayasaka, K., Hayashii, H., Hedges, M. T., Herrmann, D., Hou, W.S., Hsu, C.L., Iijima, T., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Kalita, D., Kaliyar, A. B., Kang, K. H., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kindo, H., Kinoshita, K., Kodyš, P., Korobov, A., Korpar, S., Križan, P., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lange, J. S., Lee, S. C., Li, J., Li, L. K., Li, Y., Libby, J., Lieret, K., Lin, Y.R., Liventsev, D., Ma, Y., Masuda, M., Matsuda, T., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Mussa, R., Nakamura, I., Nakao, M., Narwal, D., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Park, S.H., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rabusov, A., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Shan, W., Shapkin, M., Sharma, C., Shiu, J.G., Singh, J. B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Tiwary, R., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Vahsen, S. E., Varner, G., Vinokurova, A., Vossen, A., Wang, D., Wang, E., Wang, M.Z., Watanuki, S., Xu, X., Yabsley, B. D., Yan, W., Yang, S. B., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We present the first measurement of the Michel parameter ξ′ in the τ−→μ−ν¯μντ decay using the full data sample of 988 fb−1 collected by the Belle detector operating at the KEKB asymmetric energy e+e− collider. The method is based on the reconstruction of the μ−→e−ν¯eνμ decay-in-flight in the Belle central drift chamber and relies on the correlation between muon spin and its daughter electron momentum. We study the main sources of the background that can imitate the signal decay, such as kaon and pion decays-in-flight and charged particle scattering on the detector material. Highly efficient methods of their suppression are developed and applied to select 165 signal-candidate events. We obtain ξ′=0.22±0.94±0.42 where the first uncertainty is statistical, and the second one is systematic. The result is in agreement with the Standard Model prediction of ξ′=1.

Published
2023

16. First Measurement of the Michel Parameter <math><mrow><msup><mrow><mi>ξ</mi></mrow><mrow><mo>′</mo></mrow></msup></mrow></math> in the <math><mrow><msup><mrow><mi>τ</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><msup><mrow><mi>μ</mi></mrow><mrow><mo>−</mo></mrow></msup><msub><mrow><mover><mrow><mi>ν</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow><mrow><mi>μ</mi></mrow></msub><msub><mrow><mi>ν</mi></mrow><mrow><mi>τ</mi></mrow></msub></mrow></math> Decay at Belle

Author

Bodrov, D., Pakhlov, P., Adachi, I., Aihara, H., Said, S. Al, Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Banerjee, Sw., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Biswas, D., Bobrov, A., Bondar, A., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B. G., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Greenwald, D., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Halder, S., Hayasaka, K., Hayashii, H., Hedges, M. T., Herrmann, D., Hou, W.S., Hsu, C.L., Iijima, T., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Kalita, D., Kaliyar, A. B., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kindo, H., Kinoshita, K., Kodyš, P., Korpar, S., Križan, P., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lange, J. S., Lee, S. C., Li, J., Li, L. K., Libby, J., Lieret, K., Lin, Y.R., Liventsev, D., Luo, T., Ma, Y., Masuda, M., Matsuda, T., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Mussa, R., Nakao, M., Narwal, D., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Oskin, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Park, S.H., Passeri, A., Patra, S., Paul, S., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rabusov, A., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Shan, W., Shapkin, M., Sharma, C., Shiu, J.G., Singh, J. B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Tiwary, R., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Vahsen, S. E., Varner, G., Vinokurova, A., Vossen, A., Wang, D., Wang, E., Wang, M.Z., Watanuki, S., Werbycka, O., Xu, X., Yabsley, B. D., Yan, W., Yang, S. B., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We report the first measurement of the Michel parameter ξ′ in the τ−→μ−ν¯μντ decay with a new method proposed just recently. The measurement is based on the reconstruction of the τ−→μ−ν¯μντ events with subsequent muon decay in flight in the Belle central drift chamber. The analyzed data sample of 988 fb−1 collected by the Belle detector corresponds to approximately 912×106 τ+τ− pairs. We measure ξ′=0.22±0.94(stat)±0.42(syst), which is in agreement with the standard model prediction of ξ′=1. Statistical uncertainty dominates in this study, being a limiting factor, while systematic uncertainty is well under control. Our analysis proved the practicability of this promising method and its prospects for further precise measurement in future experiments.

Published
2023

17. First measurement of the <math><msup><mi>Q</mi><mn>2</mn></msup></math> distribution of <math><mrow><mi>X</mi><mo>(</mo><mn>3915</mn><mo>)</mo></mrow></math> single-tag two-photon production

Author

Teramoto, Y., Uehara, S., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Banerjee, Sw., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bilka, T., Biswas, D., Bodrov, D., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chekelian, V., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Epifanov, D., Ferlewicz, D., Frey, A., Fulsom, B. G., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Halder, S., Han, X., Hara, T., Hayasaka, K., Hayashii, H., Hedges, M. T., Herrmann, D., Hou, W.S., Hsu, C.L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Ji, Q. P., Jin, Y., Joo, K. K., Kaliyar, A. B., Kang, K. H., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Križan, P., Krokovny, P., Kuhr, T., Kumar, M., Kumara, K., Kwon, Y.J., Lalwani, K., Lam, T., Lange, J. S., Laurenza, M., Lee, S. C., Levit, D., Li, L. K., Li, Y., Li Gioi, L., Libby, J., Lin, Y.R., Liventsev, D., Luo, T., Masuda, M., Matvienko, D., Maurya, S. K., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mussa, R., Nakamura, I., Nakao, M., Nakazawa, H., Narwal, D., Natkaniec, Z., Natochii, A., Nayak, L., Nisar, N. K., Nishida, S., Ogawa, K., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pang, T., Pardi, S., Park, J., Park, S.H., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rabusov, A., Röhrken, M., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shan, W., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Shwartz, B., Simon, F., Singh, J. B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Vahsen, S. E., van Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Wang, D., Wang, M.Z., Wang, X. L., Watanabe, M., Won, E., Xu, X., Yabsley, B. D., Yan, W., Yang, S. B., Yelton, J., Yin, J. H., Yook, Y., Yuan, C. Z., Yuan, L., Yusa, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We report the first measurement of the Q2 distribution of X(3915) produced by single-tag two-photon interactions. The decay mode used is X(3915)→J/ψω. The covered Q2 region is from 1.5 (GeV/c)2 to 10.0 (GeV/c)2. We observe 7.9±3.1(stat)±1.5(syst) events, where we expect 4.1±0.7 events based on the Q2=0 result from the no-tag two-photon process, extrapolated to higher Q2 region using the cc¯ model of Schuler, Berends, and van Gulik. The shape of the distribution is also consistent with this model; we note that statistical uncertainties are large.

Published
2023

18. Measurement of differential distributions of <math><mi>B</mi><mo>→</mo><msup><mi>D</mi><mo>*</mo></msup><mo>ℓ</mo><msub><mover><mi>ν</mi><mo>¯</mo></mover><mo>ℓ</mo></msub></math> and implications on <math><mo>|</mo><msub><mi>V</mi><mrow><mi>c</mi><mi>b</mi></mrow></msub><mo>|</mo></math>

Author

Prim, M. T., Bernlochner, F., Metzner, F., Lieret, K., Kuhr, T., Adachi, I., Aihara, H., Said, S. Al, Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Banerjee, Sw., Bauer, M., Behera, P., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Biswas, D., Bodrov, D., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Cao, L., Červenkov, D., Chang, M.C., Chekelian, V., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., Dash, N., de Marino, G., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Epifanov, D., Ferber, T., Ferlewicz, D., Frey, A., Fulsom, B. G., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Halder, S., Hara, T., Hayasaka, K., Hayashii, H., Hedges, M. T., Herrmann, D., Hernández Villanueva, M., Hsu, C.L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Jia, S., Jin, Y., Joo, K. K., Kaliyar, A. B., Kang, K. H., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.J., Lalwani, K., Lange, J. S., Laurenza, M., Lee, S. C., Lewis, P., Li, J., Li, L. K., Li, Y., Libby, J., Lin, Y.R., Liventsev, D., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Nakamura, I., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nisar, N. K., Nishida, S., Ogawa, K., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pang, T., Pardi, S., Park, H., Park, J., Park, S.H., Passeri, A., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Rabusov, A., Röhrken, M., Rostomyan, A., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Sevior, M. E., Shan, W., Shapkin, M., Sharma, C., Shiu, J.G., Shwartz, B., Simon, F., Soffer, A., Sokolov, A., Solovieva, E., Starič, M., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Vahsen, S. E., van Tonder, R., Varner, G., Varvell, K. E., Vinokurova, A., Vossen, A., Waheed, E., Wang, D., Wang, M.Z., Watanabe, M., Watanuki, S., Won, E., Yabsley, B. D., Yan, W., Yang, S. B., Yelton, J., Yook, Y., Yuan, C. Z., Yuan, L., Yusa, Y., Zhai, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We present a measurement of the differential shapes of exclusive B→D*ℓν¯ℓ (B=B−,B¯0 and ℓ=e, μ) decays with hadronic tag-side reconstruction for the full 711 fb−1 Belle dataset. We extract the Caprini-Lellouch-Neubert (CLN) and Boyd-Grinstein-Lebed (BGL) form factor parameters and use an external input for the absolute branching fractions to determine the Cabibbo-Kobayashi-Maskawa matrix element and find |Vcb|CLN=(40.2±0.9)×10−3 and |Vcb|BGL=(40.7±1.0)×10−3 with the zero-recoil lattice QCD point F(1)=0.906±0.013. We also perform a study of the impact of beyond zero-recoil lattice QCD calculations on the |Vcb| determinations. Additionally, we present the lepton-flavor universality ratio Reμ=B(B→D*eν¯e)/B(B→D*μν¯μ)=0.993±0.023±0.023, the electron and muon forward-backward asymmetry and their difference ΔAFB=0.028±0.028±0.008, and the electron and muon D* longitudinal polarization fraction and their difference ΔFLD*=0.030±0.025±0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.

Published
2023

19. Search for the Lepton Flavor Violating Decays <math><mrow><msup><mrow><mi>B</mi></mrow><mrow><mo>+</mo></mrow></msup><mo>→</mo><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>τ</mi></mrow><mrow><mo>±</mo></mrow></msup><msup><mrow><mo>ℓ</mo></mrow><mrow><mo>∓</mo></mrow></msup></mrow></math> (<math><mrow><mo>ℓ</mo><mo>=</mo><mi>e</mi></mrow></math>, <math><mrow><mi>μ</mi></mrow></math>) at Belle

Author

Watanuki, S., de Marino, G., Trabelsi, K., Adachi, I., Aihara, H., Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Banerjee, Sw., Bauer, M., Behera, P., Belous, K., Bessner, M., Bhardwaj, V., Bhuyan, B., Biswas, D., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Cao, L., Červenkov, D., Chang, M.C., Cheon, B. G., Chilikin, K., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dong, T. V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Halder, S., Han, X., Hara, T., Hayasaka, K., Hayashii, H., Herrmann, D., Hou, W.S., Hsu, C.L., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Kaliyar, A. B., Kichimi, H., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kuhr, T., Kumar, M., Kumara, K., Kuzmin, A., Kwon, Y.J., Lange, J. S., Laurenza, M., Lee, S. C., Lewis, P., Li, L. K., Li, Y., Li Gioi, L., Libby, J., Lin, Y.R., Liventsev, D., Matsuda, T., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Nakao, M., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ono, H., Oskin, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Park, S.H., Passeri, A., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Röhrken, M., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shan, W., Shapkin, M., Shiu, J.G., Shwartz, B., Simon, F., Solovieva, E., Starič, M., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., van Tonder, R., Varner, G., Varvell, K. E., Wang, D., Wang, E., Wang, M.Z., Won, E., Xu, X., Yabsley, B. D., Yan, W., Yang, S. B., Yelton, J., Yusa, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We present a search for the lepton flavor violating decays B+→K+τ±ℓ∓, with ℓ=(e,μ), using the full data sample of 772×106 BB¯ pairs recorded by the Belle detector at the KEKB asymmetric-energy e+e− collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode. We find no evidence for B±→K±τℓ decays and set upper limits on their branching fractions at the 90% confidence level in the (1−3)×10−5 range. The obtained limits are the world’s best results.

Published
2023

20. Study of the lineshape of <math><mi>X</mi><mo>(</mo><mn>3872</mn><mo>)</mo></math> using <math><mi>B</mi></math> decays to <math><msup><mi>D</mi><mn>0</mn></msup><msup><mover><mi>D</mi><mo>¯</mo></mover><mrow><mo>*</mo><mn>0</mn></mrow></msup><mi>K</mi></math>

Author

Hirata, H., Iijima, T., Kato, Y., Tanida, K., Adachi, I., Ahn, J. K., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Banerjee, Sw., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chang, P., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Das, S., de Marino, G., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B. G., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gudkova, K., Hadjivasiliou, C., Halder, S., Hara, T., Hayasaka, K., Hayashii, H., Hedges, M. T., Herrmann, D., Hou, W.S., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Jia, S., Jin, Y., Kalita, D., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kuhr, T., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.J., Lam, T., Lange, J. S., Laurenza, M., Lautenbach, K., Lee, S. C., Li, L. K., Li, Y., Libby, J., Lieret, K., Lin, Y.R., Liventsev, D., Luo, T., Ma, Y., Martini, A., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mohanty, G. B., Mrvar, M., Mussa, R., Nakamura, I., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N. K., Nishida, S., Ogawa, K., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pang, T., Pardi, S., Park, H., Park, J., Park, S.H., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Sevior, M. E., Shan, W., Shapkin, M., Sharma, C., Shiu, J.G., Shwartz, B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanaka, S., Tenchini, F., Tiwary, R., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Urquijo, P., Usov, Y., Vahsen, S. E., Varner, G., Vinokurova, A., Vossen, A., Wang, D., Wang, E., Wang, M.Z., Watanuki, S., Werbycka, O., Won, E., Xu, X., Yabsley, B. D., Yan, W., Yang, S. B., Yelton, J., Yin, J. H., Yook, Y., Yuan, C. Z., Yuan, L., Yusa, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We present a study of the X(3872) lineshape in the decay B→X(3872)K→D0D¯*0K using a data sample of 772×106 BB¯ pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. The peak near the threshold in the D0D¯*0 invariant mass spectrum is fitted using a relativistic Breit-Wigner lineshape. We determine the mass and width parameters to be mBW=3873.71−0.50+0.56(stat)±0.13(syst) MeV/c2 and ΓBW=5.2−1.5+2.2(stat)±0.4(syst) MeV, respectively. The branching fraction is found to be B(B+→X(3872)K+)×B(X(3872)→D0D¯*0)=(0.97−0.18+0.21(stat)±0.10(syst))×10−4. The signal from B0 decays is observed for the first time with 5.2σ significance, and the ratio of branching fractions between charged and neutral B decays is measured to be B(B0→X(3872)K0)/B(B+→X(3872)K+)=1.34−0.40+0.47(stat)−0.12+0.10(syst). The peak is also studied using a Flatté lineshape. We determine the lower limit on the DD¯* coupling constant g to be 0.075 at 95% credibility in the parameter region where the ratio of g to the mass difference from the D0D¯*0 threshold is equal to −15.11 GeV−1, as measured by LHCb.

Published
2023

21. Measurement of the branching fraction and <math><mi>C</mi><mi>P</mi></math> asymmetry of <math><msup><mi>B</mi><mn>0</mn></msup><mo>→</mo><msup><mi>π</mi><mn>0</mn></msup><msup><mi>π</mi><mn>0</mn></msup></math> decays using <math><mn>198</mn><mo>×</mo><mn>1</mn><msup><mn>0</mn><mn>6</mn></msup></math> <math><mi>B</mi><mover><mi>B</mi><mo>¯</mo></mover></math> pairs in Belle II data

Author

Abudinén, F., Adachi, I., Adamczyk, K., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D. M., Atmacan, H., Aushev, T., Aushev, V., Bae, H., Bahinipati, S., Bambade, P., Banerjee, Sw., Bansal, S., Barrett, M., Baudot, J., Bauer, M., Baur, A., Beaubien, A., Becker, J., Behera, P. K., Bennett, J. V., Bernieri, E., Bernlochner, F. U., Bertacchi, V., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bhardwaj, V., Bhuyan, B., Bianchi, F., Bilka, T., Bilokin, S., Biswas, D., Bodrov, D., Bolz, A., Borah, J., Bozek, A., Bračko, M., Branchini, P., Briere, R. A., Browder, T. E., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Cecchi, C., Chang, M.C., Chang, P., Cheaib, R., Cheema, P., Chekelian, V., Chen, C., Chen, Y. Q., Cheon, B. G., Chilikin, K., Chirapatpimol, K., Cho, H.E., Cho, K., Cho, S.J., Choi, S.K., Choudhury, S., Cinabro, D., Cochran, J., Corona, L., Cunliffe, S., Das, S., Dattola, F., De La Cruz-Burelo, E., De La Motte, S. A., de Marino, G., De Nardo, G., De Nuccio, M., De Pietro, G., de Sangro, R., Destefanis, M., Dey, S., De Yta-Hernandez, A., Dhamija, R., Di Canto, A., Di Capua, F., Doležal, Z., Domínguez Jiménez, I., Dong, T. V., Dorigo, M., Dort, K., Dossett, D., Dreyer, S., Dubey, S., Dujany, G., Ecker, P., Eliachevitch, M., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finck, C., Finocchiaro, G., Fodor, A., Forti, F., Frey, A., Fulsom, B. G., Gabrielli, A., Ganiev, E., Garcia-Hernandez, M., Gaudino, G., Gaur, V., Gellrich, A., Ghevondyan, G., Giordano, R., Giri, A., Gobbo, B., Godang, R., Goldenzweig, P., Gradl, W., Grammatico, T., Granderath, S., Graziani, E., Greenwald, D., Gruberová, Z., Gu, T., Guan, Y., Gudkova, K., Guilliams, J., Halder, S., Hara, T., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Hedges, M. T., Heredia de la Cruz, I., Hernández Villanueva, M., Hershenhorn, A., Higuchi, T., Hill, E. C., Hohmann, M., Hsu, C.L., Humair, T., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Itoh, R., Iwasaki, M., Jackson, P., Jacobs, W. W., Jaffe, D. E., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Junkerkalefeld, H., Kakuno, H., Kaleta, M., Kaliyar, A. B., Kandra, J., Kang, K. H., Kang, S., Karl, R., Karyan, G., Kawasaki, T., Kiesling, C., Kim, C.H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kindo, H., Kinoshita, K., Kodyš, P., Koga, T., Kohani, S., Kojima, K., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T. M. G., Križan, P., Krokovny, P., Kuhr, T., Kumar, J., Kumar, R., Kumara, K., Kunigo, T., Kuzmin, A., Kwon, Y.J., Lacaprara, S., Lam, T., Lanceri, L., Lange, J. S., Laurenza, M., Lautenbach, K., Leboucher, R., Le Diberder, F. R., Leitl, P., Li, C., Li, L. K., Li, Y. B., Libby, J., Lieret, K., Liptak, Z., Liu, Q. Y., Liu, Z. Q., Liventsev, D., Longo, S., Lozar, A., Lueck, T., Lyu, C., Maggiora, M., Maharana, S. P., Maiti, R., Maity, S., Manfredi, R., Manoni, E., Manthei, A. C., Mantovano, M., Marcello, S., Marinas, C., Martel, L., Martellini, C., Martini, A., Martinov, T., Massaccesi, L., Matsuda, T., Matsuoka, K., Matvienko, D., Maurya, S. K., McKenna, J. A., Meier, F., Merola, M., Metzner, F., Milesi, M., Miller, C., Miyabayashi, K., Miyake, H., Mizuk, R., Mohanty, G. B., Molina-Gonzalez, N., Moneta, S., Moser, H.G., Mrvar, M., Mussa, R., Nakamura, I., Nakamura, K. R., Nakao, M., Nakayama, H., Nakazawa, Y., Narimani Charan, A., Naruki, M., Narwal, D., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nazaryan, G., Niebuhr, C., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Paladino, A., Panta, A., Paoloni, E., Pardi, S., Parham, K., Park, H., Park, J., Park, S.H., Paschen, B., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Peruzzi, I., Peschke, R., Pestotnik, R., Pham, F., Piccolo, M., Piilonen, L. E., Pinna Angioni, G., Podesta-Lerma, P. L. M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M. T., Purwar, H., Rad, N., Rados, P., Raeuber, G., Raiz, S., Ramirez Morales, A., Reif, M., Reiter, S., Remnev, M., Ripp-Baudot, I., Rizzo, G., Rizzuto, L. B., Robertson, S. H., Rodríguez Pérez, D., Roney, J. M., Rostomyan, A., Rout, N., Russo, G., Sanders, D. A., Sandilya, S., Sangal, A., Santelj, L., Sato, Y., Savinov, V., Scavino, B., Schueler, J., Schwanda, C., Schwartz, A. J., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sevior, M. E., Sfienti, C., Sharma, C., Shen, C. P., Shi, X. D., Shillington, T., Shiu, J.G., Shwartz, B., Sibidanov, A., Simon, F., Singh, J. B., Skorupa, J., Sobie, R. J., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Starič, M., Stefkova, S., Stottler, Z. S., Stroili, R., Strube, J., Sue, Y., Sumihama, M., Sumisawa, K., Sutcliffe, W., Suzuki, S. Y., Svidras, H., Takizawa, M., Tamponi, U., Tanida, K., Tanigawa, H., Tenchini, F., Thaller, A., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Tsaklidis, I., Uchida, M., Ueda, I., Uematsu, Y., Uglov, T., Unger, K., Unno, Y., Uno, K., Uno, S., Urquijo, P., Ushiroda, Y., Vahsen, S. E., van Tonder, R., Varner, G. S., Varvell, K. E., Vinokurova, A., Vismaya, V. S., Vitale, L., Vobbilisetti, V., Vossen, A., Wakeling, H. M., Wallner, S., Wang, E., Wang, M.Z., Wang, X. L., Warburton, A., Watanabe, M., Watanuki, S., Welsch, M., Wessel, C., Wiechczynski, J., Won, E., Xu, X. P., Yabsley, B. D., Yamada, S., Yan, W., Yang, S. B., Ye, H., Yelton, J., Yin, J. H., Yook, Y. M., Yoshihara, K., Yuan, C. Z., Yusa, Y., Zani, L., Zhai, Y., Zhang, Y., Zhilich, V., Zhou, Q. D., Zhou, X. Y., Zhukova, V. I., and Žlebčík, R.

Abstract

We report measurements of the branching fraction and CP asymmetry in B0→π0π0 decays reconstructed at Belle II in an electron-positron collision sample containing 198×106 BB¯ pairs. We measure a branching fraction B(B0→π0π0)=(1.38±0.27±0.22)×10−6 and a CP asymmetry ACP(B0→π0π0)=0.14±0.46±0.07, where the first uncertainty is statistical and the second is systematic.

Published
2023

22. Search for lepton-flavor-violating τ decays into a lepton and a vector meson using the full Belle data sample

Author

Tsuzuki, N., Inami, K., Adachi, I., Aihara, H., Asner, D., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Banerjee, Sw., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Biswas, D., Bodrov, D., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Cheon, B., Chilikin, K., Cho, H., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Cochran, J., Das, S., Dash, N., Nardo, G., Pietro, G., Dhamija, R., Capua, F., Doležal, Z., Dong, T., Dossett, D., Dubey, S., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B., Gaur, V., Giri, A., Goldenzweig, P., Guan, Y., Gudkova, K., Han, X., Hara, T., Hayasaka, K., Hayashii, H., Hedges, M., Herrmann, D., Hou, W.S., Hsu, C.L., Iijima, T., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W., Jang, E.J., Jia, S., Jin, Y., Kawasaki, T., Kiesling, C., Kim, C., Kim, D., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumara, K., Kuzmin, A., Kwon, Y.J., Lee, S., Li, J., Li, L., Li, Y., Libby, J., Lieret, K., Lin, Y.R., Liventsev, D., Ma, Y., Martini, A., Masuda, M., Matsuoka, K., Matvienko, D., Maurya, S., Meier, F., Merola, M., Miyabayashi, K., Mizuk, R., Mohanty, G., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Niiyama, M., Nisar, N., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlova, G., Pang, T., Pardi, S., Park, H., Park, J., Park, S.H., Passeri, A., Paul, S., Pedlar, T., Pestotnik, R., Piilonen, L., Podobnik, T., Prencipe, E., Prim, M., Rostomyan, A., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Sevior, M., Shan, W., Shapkin, M., Sharma, C., Shiu, J.G., Solovieva, E., Starič, M., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Ushiroda, Y., Vahsen, S., Varner, G., Vinokurova, A., Wang, D., Wang, E., Wang, M.Z., Wang, X., Watanuki, S., Xu, X., Yabsley, B., Yan, W., Yang, S., Yelton, J., Yook, Y., Yuan, L., Zhai, Y., Zhilichand, V., and Zhukova, V.

Abstract

Charged-lepton-flavor-violation is predicted in several new physics scenarios. We update the analysis of τ lepton decays into a light charged lepton (ℓ = e ± or μ ± ) and a vector meson (V 0 = ρ 0, ϕ, ω, K *0, or K ¯ $$ \overline{K} $$ *0) using 980 fb −1 of data collected with the Belle detector at the KEKB collider. No significant excess of such signal events is observed, and thus 90% credibility level upper limits are set on the τ → ℓV 0 branching fractions in the range of (1.7–4.3) × 10 −8. These limits are improved by 30% on average from the previous results.

Published
2023

25. First observation of <math><mrow><mi>B</mi><mo>→</mo><msub><mrow><mover><mrow><mi>D</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow><mrow><mn>1</mn></mrow></msub><mo>(</mo><mo>→</mo><mover><mrow><mi>D</mi></mrow><mrow><mo>¯</mo></mrow></mover><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>)</mo><msup><mrow><mo>ℓ</mo></mrow><mrow><mo>+</mo></mrow></msup><msub><mrow><mi>ν</mi></mrow><mrow><mo>ℓ</mo></mrow></msub></mrow></math> and measurement of the <math><mrow><mi>B</mi><mo>→</mo><msup><mrow><mover><mrow><mi>D</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow><mrow><mo>(</mo><mo>*</mo><mo>)</mo></mrow></msup><mi>π</mi><msup><mrow><mo>ℓ</mo></mrow><mrow><mo>+</mo></mrow></msup><msub><mrow><mi>ν</mi></mrow><mrow><mo>ℓ</mo></mrow></msub></mrow></math> and <math><mrow><mi>B</mi><mo>→</mo><msup><mrow><mover><mrow><mi>D</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow><mrow><mo>(</mo><mo>*</mo><mo>)</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><msup><mrow><mo>ℓ</mo></mrow><mrow><mo>+</mo></mrow></msup><msub><mrow><mi>ν</mi></mrow><mrow><mo>ℓ</mo></mrow></msub></mrow></math> branching fractions with hadronic tagging at Belle

Author

Meier, F., Vossen, A., Adachi, I., Adamczyk, K., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Banerjee, Sw., Bauer, M., Behera, P., Belous, K., Bennett, J., Bernlochner, F., Bessner, M., Bhuyan, B., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Cao, L., Červenkov, D., Chang, M.C., Chang, P., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Giri, A., Goldenzweig, P., Golob, B., Graziani, E., Gudkova, K., Hadjivasiliou, C., Halder, S., Hara, T., Hayasaka, K., Hayashii, H., Hedges, M. T., Hou, W.S., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Jin, Y., Kaliyar, A. B., Kang, K. H., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Lee, S. C., Lewis, P., Li, C. H., Li, L. K., Li, Y., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Lin, Y.R., Liventsev, D., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mussa, R., Nakamura, I., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Passeri, A., Patra, S., Paul, S., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rostomyan, A., Rout, N., Russo, G., Sandilya, S., Santelj, L., Savinov, V., Schnell, G., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Simon, F., Singh, J. B., Soffer, A., Solovieva, E., Starič, M., Stottler, Z. S., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Urquijo, P., Vahsen, S. E., van Tonder, R., Varner, G., Varvell, K. E., Vinokurova, A., Wang, M.Z., Watanabe, M., Watanuki, S., Wiechczynski, J., Won, E., Xu, X., Yabsley, B. D., Yan, W., Yang, S. B., Yin, J. H., Yuan, C. Z., Yuan, L., Yusa, Y., Zhang, Z. P., and Zhukova, V.

Abstract

We report measurements of the ratios of branching fractions for B→D¯(*)πℓ+νℓ and B→D¯(*)π+π−ℓ+νℓ relative to B→D¯*ℓ+νℓ decays with ℓ=e, μ. These results are obtained from a data sample that contains 772×106BB¯ pairs collected near the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e− collider. Fully reconstructing both B mesons in the event, we obtain B(B0→D¯0π−ℓ+νℓ)B(B0→D*−ℓ+νℓ)=(7.23±0.36±0.14)%, B(B+→D−π+ℓ+νℓ)B(B+→D¯*0ℓ+νℓ)=(6.78±0.24±0.18)%, B(B0→D¯*0π−ℓ+νℓ)B(B0→D*−ℓ+νℓ)=(11.10±0.48±0.23)%, B(B+→D*−π+ℓ+νℓ)B(B+→D¯*0ℓ+νℓ)=(9.50±0.33±0.34)%, B(B0→D−π+π−ℓ+νℓ)B(B0→D*−ℓ+νℓ)=(2.91±0.37±0.26)%, B(B+→D¯0π+π−ℓ+νℓ)B(B+→D¯*0ℓ+νℓ)=(3.10±0.26±0.22)%, B(B0→D*−π+π−ℓ+νℓ)B(B0→D*−ℓ+νℓ)=(0.99±0.43±0.20)%, B(B+→D¯*0π+π−ℓ+νℓ)B(B+→D¯*0ℓ+νℓ)=(1.25±0.27±0.15)%, where the uncertainties are statistical and systematic, respectively. These are the most precise measurements of these branching fraction ratios to date. The invariant mass spectra of the Dπ, D*π, and Dππ systems are studied, and the branching fraction products B(B0→D2*−ℓ+νℓ)×B(D2*−→D¯0π−)=(0.157±0.015±0.005)%, B(B+→D¯0*0ℓ+νℓ)×B(D¯0*0→D−π+)=(0.054±0.022±0.005)%, B(B+→D¯2*0ℓ+νℓ)×B(D¯2*0→D−π+)=(0.163±0.011±0.008)%, B(B0→D1−ℓ+νℓ)×B(D1−→D¯*0π−)=(0.306±0.050±0.029)%, B(B0→D1′−ℓ+νℓ)×B(D1′−→D¯*0π−)=(0.206±0.068±0.025)%, B(B0→D2*−ℓ+νℓ)×B(D2*−→D¯*0π−)=(0.051±0.040±0.010)%, B(B+→D¯10ℓ+νℓ)×B(D¯10→D*−π+)=(0.249±0.023±0.015)%, B(B+→D¯1′0ℓ+νℓ)×B(D¯1′0→D*−π+)=(0.138±0.036±0.009)%, B(B+→D¯2*0ℓ+νℓ)×B(D¯2*0→D*−π+)=(0.137±0.026±0.009)%, B(B0→D1−ℓ+νℓ)×B(D1−→D−π+π−)=(0.102±0.013±0.009)%, B(B+→D¯10ℓ+νℓ)×B(D¯10→D¯0π+π−)=(0.105±0.011±0.009)%, are extracted. This is the first observation of the decays B→D¯1ℓ+νℓ with D1→Dπ+π−.

Published
2023

26. Study of <math><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>−</mo></msup><mo>→</mo><msup><mi>Σ</mi><mn>0</mn></msup><msup><mover><mi>Σ</mi><mo>¯</mo></mover><mn>0</mn></msup></math> and <math><msup><mi>Σ</mi><mo>+</mo></msup><msup><mover><mi>Σ</mi><mo>¯</mo></mover><mo>−</mo></msup></math> by initial state radiation method at Belle

Author

Gong, G., Li, L. K., Zhang, Y., Yan, W., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Banerjee, Sw., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chen, A., Chen, Y., Cheon, B. G., Chilikin, K., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Doležal, Z., Dong, T. V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Golob, B., Graziani, E., Gudkova, K., Halder, S., Hayasaka, K., Hayashii, H., Hedges, M. T., Hou, W.S., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Jia, S., Jin, Y., Joo, K. K., Kaliyar, A. B., Kang, K. H., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, Y.K., Kinoshita, K., Kodyš, P., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Lee, S. C., Lewis, P., Li, C. H., Li, Y., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Lin, Y.R., Liventsev, D., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mussa, R., Nakamura, I., Nakano, T., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Patra, S., Paul, S., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rostomyan, A., Rout, N., Russo, G., Sakai, Y., Sandilya, S., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shan, W., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Shwartz, B., Simon, F., Sokolov, A., Solovieva, E., Starič, M., Sumihama, M., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, K., Uno, S., Urquijo, P., Vahsen, S. E., van Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Wang, M.Z., Wang, X. L., Watanabe, M., Watanuki, S., Werbycka, O., Won, E., Xu, X., Yabsley, B. D., Yang, S. B., Yelton, J., Yin, J. H., Yuan, C. Z., Yuan, L., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

The processes e+e−→Σ0Σ¯0 and e+e−→Σ+Σ¯− are studied using initial-state-radiation events in a sample of 980 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider. The cross sections from the mass threshold to 3 GeV/c2 and the effective form factors of Σ0 and Σ+ are measured. In the charmonium region, we observe the decays J/ψ→Σ0Σ¯0 and J/ψ→Σ+Σ¯− and determine the respective branching fractions.

Published
2023

27. First Observation of <math><mrow><mi>Λ</mi><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math> and <math><mi>Λ</mi><msup><mi>π</mi><mo>−</mo></msup></math> Signals near the <math><mrow><mover><mrow><mi>K</mi></mrow><mrow><mo>¯</mo></mrow></mover><mi>N</mi><mo>(</mo><mi>I</mi><mo>=</mo><mn>1</mn><mo>)</mo></mrow></math> Mass Threshold in <math><mrow><msubsup><mrow><mi>Λ</mi></mrow><mrow><mi>c</mi></mrow><mrow><mo>+</mo></mrow></msubsup><mo>→</mo><mi>Λ</mi><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math> Decay

Author

Ma, Y., Yelton, J., Tanida, K., Adachi, I., Ahn, J. K., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Banerjee, Sw., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chen, A., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Golob, B., Graziani, E., Gudkova, K., Hadjivasiliou, C., Halder, S., Hayasaka, K., Hayashii, H., Hedges, M. T., Hou, W.S., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Jia, S., Jin, Y., Kaliyar, A. B., Kang, K. H., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, Y.K., Kinoshita, K., Kodyš, P., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Lee, S. C., Lewis, P., Li, L. K., Li, Y., Li Gioi, L., Libby, J., Lieret, K., Lin, Y.R., Liventsev, D., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mohanty, G. B., Mussa, R., Nakamura, I., Nakano, T., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Patra, S., Paul, S., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rostomyan, A., Rout, N., Russo, G., Sandilya, S., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shan, W., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Simon, F., Sokolov, A., Solovieva, E., Starič, M., Sumihama, M., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tenchini, F., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, K., Uno, S., Urquijo, P., Usov, Y., Vahsen, S. E., van Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Wang, D., Wang, M.Z., Watanabe, M., Watanuki, S., Werbycka, O., Won, E., Xu, X., Yabsley, B. D., Yan, W., Yang, S. B., Yin, J. H., Yuan, C. Z., Yuan, L., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

Using the data sample of 980 fb−1 collected with the Belle detector operating at the KEKB asymmetric-energy e+e− collider, we present the results of an investigation of the Λπ+ and Λπ− invariant mass distributions looking for substructure in the decay Λc+→Λπ+π+π−. We find a significant signal in each mass distribution. When interpreted as resonances, we find for the Λπ+ (Λπ−) combination a mass of 1434.3±0.6(stat)±0.9(syst) MeV/c2 [1438.5±0.9(stat)±2.5(syst) MeV/c2], an intrinsic width of 11.5±2.8(stat)±5.3(syst) MeV/c2 [33.0±7.5(stat)±23.6(syst) MeV/c2] with a significance of 7.5σ (6.2σ). As these two signals are very close to the K¯N threshold, we also investigate the possibility of a K¯N cusp, and find that we cannot discriminate between these two interpretations due to the limited size of the data sample.

Published
2023

28. Two-particle angular correlations in e + e − collisions to hadronic final states in two reference coordinates at Belle

Author

Chen, Y.C., Lee, Y.J., Chang, P., Adachi, I., Aihara, H., Said, S., Asner, D., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chekelian, V., Cheon, B., Chilikin, K., Cho, H., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., Pietro, G., Dhamija, R., Capua, F., Dingfelder, J., Doležal, Z., Dong, T., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Hedges, M., Herrmann, D., Hou, W.S., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W., Jang, E.J., Jia, S., Jin, Y., Joo, K., Kang, K., Karyan, G., Kawasaki, T., Kiesling, C., Kim, C., Kim, D., Kim, K.H., Kim, Y.K., Kodyš, P., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J., Lee, S., Li, J., Li, L., Li, Y., Gioi, L., Libby, J., Lin, C.W., Lieret, K., Liventsev, D., Masuda, M., Matsuda, T., Maurya, S., Meier, F., Merola, M., Miyabayashi, K., Mizuk, R., Mohanty, G., Mrvar, M., Mussa, R., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, M., Nisar, N., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlova, G., Pardi, S., Park, H., Park, S.H., Patra, S., Paul, S., Pedlar, T., Pestotnik, R., Piilonen, L., Podobnik, T., Prencipe, E., Prim, M., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schwanda, C., Seidl, R., Seino, Y., Senyo, K., Sevior, M., Shapkin, M., Sharma, C., Shen, C., Shiu, J.G., Solovieva, E., Starič, M., Stottler, Z., Strube, J., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Urquijo, P., Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Waheed, E., Wang, E., Wang, M.Z., Wang, X., Watanabe, M., Watanuki, S., Won, E., Yan, W., Yang, S., Yin, J., Yuan, C., Yusa, Y., Zhai, Y., Zhang, Z., Zhilich, V., and Zhukova, V.

Abstract

We present the analysis of two-particle angular correlations using coordinate systems defined with the conventional beam axis and the event thrust axis. We propose the latter as a good representation for the correlation structure interpretation in the e + e − collision system. The e + e − collisions to hadronic final states at center-of-mass energies of s $$ \sqrt{s} $$ = 10.52 GeV and 10.58 GeV are recorded by the Belle detector at KEKB. In this paper, results on the first dataset are supplementary to the previous Belle publication [1]. At the same time, the latter is the first two-particle correlation measurement at collision energy on the Υ(4S) resonance and is sensitive to its decay products. Measurements are reported as a function of the charged-particle multiplicity. Finally, a qualitative understanding of the correlation structure is discussed using a combination of Monte Carlo simulations and experimental data.

Published
2023

29. Search for <math><mrow><mi>X</mi><mo>(</mo><mn>3872</mn><mo>)</mo><mo>→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow></math> at Belle

Author

Yin, J. H., Won, E., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Ferber, T., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Hou, W.S., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Jia, S., Jin, Y., Joo, K. K., Kakuno, H., Kang, K. H., Karyan, G., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Lam, T., Lange, J. S., Lee, S. C., Li, C. H., Li, J., Li, L. K., Li, Y., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Moon, H. K., Mrvar, M., Mussa, R., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.H., Patra, S., Paul, S., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rout, N., Russo, G., Sakai, Y., Sandilya, S., Sangal, A., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Singh, J. B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Strube, J. F., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., van Tonder, R., Varner, G., Vinokurova, A., Waheed, E., Wang, E., Wang, M.Z., Watanabe, M., Watanuki, S., Yabsley, B. D., Yan, W., Yang, S. B., Yuan, C. Z., Yusa, Y., Zhai, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., and Zhulanov, V.

Abstract

We present a search for the decay X(3872)→π+π−π0 in the (772±11)×106 ϒ(4S)→BB¯ data sample collected at the Belle detector, where the X(3872) is produced in B±→K±X(3872) and B0→KS0X(3872) decays. We do not observe a signal, and set 90% credible upper limits for two different models of the decay processes: if the decay products are distributed uniformly in phase space, B(X(3872)→π+π−π0)<1.3%, and if M(π+π−) is concentrated near the mass of the D0D¯0 pair in the process X(3872)→D0D¯*0+c.c.→D0D¯0π0→π+π−π0, B(X(3872)→π+π−π0)<1.2×10−3.

Published
2023

30. Measurement of the branching fraction and search for <math><mrow><mi>C</mi><mi>P</mi></mrow></math> violation in <math><mrow><msup><mrow><mi>D</mi></mrow><mn>0</mn></msup><mo>→</mo><msubsup><mrow><mi>K</mi></mrow><mrow><mi>S</mi></mrow><mn>0</mn></msubsup><msubsup><mrow><mi>K</mi></mrow><mrow><mi>S</mi></mrow><mn>0</mn></msubsup><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math> decays at Belle

Author

Sangal, A., Schwartz, A. J., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Červenkov, D., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Dash, N., De Pietro, G., Dhamija, R., Di Capua, F., Doležal, Z., Dong, T. V., Dossett, D., Epifanov, D., Frey, A., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Guan, Y., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Herrmann, D., Hou, W.S., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Jia, S., Jin, Y., Joo, K. K., Kang, K. H., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Laurenza, M., Lee, S. C., Li, C. H., Li, L. K., Li, Y., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Martini, A., Masuda, M., Matvienko, D., Maurya, S. K., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Moon, H. K., Mussa, R., Nakao, M., Narwal, D., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N. K., Nishida, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.H., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rout, N., Russo, G., Sandilya, S., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Shwartz, B., Singh, J. B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Strube, J. F., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Ushiroda, Y., Usov, Y., van Tonder, R., Varner, G., Varvell, K. E., Vinokurova, A., Waheed, E., Wang, E., Wang, M.Z., Watanabe, M., Watanuki, S., Wiechczynski, J., Won, E., Yabsley, B. D., Yan, W., Yang, S. B., Ye, H., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., and Zhulanov, V.

Abstract

We measure the branching fraction for the Cabibbo-suppressed decay D0→KS0KS0π+π− and search for CP violation via a measurement of the CP asymmetry ACP as well as the T-odd triple-product asymmetry aCPT. We use 922 fb−1 of data recorded by the Belle experiment, which ran at the KEKB asymmetric-energy e+e− collider. The branching fraction is measured relative to the Cabibbo-favored normalization channel D0→KS0π+π−; the result is B(D0→KS0KS0π+π−)=[4.79±0.08(stat)±0.10(syst)±0.31(norm)]×10−4, where the first uncertainty is statistical, the second is systematic, and the third is from uncertainty in the normalization channel. We also measure ACP=[−2.51±1.44(stat)−0.10+0.11(syst)]%, and aCPT=[−1.95±1.42(stat)−0.12+0.14(syst)]%. These results show no evidence of CP violation.

Published
2023

31. Observation of <math><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><mi>ω</mi><msub><mrow><mi>χ</mi></mrow><mrow><mi>b</mi><mi>J</mi></mrow></msub><mo>(</mo><mn>1</mn><mi>P</mi><mo>)</mo></mrow></math> and Search for <math><mrow><msub><mrow><mi>X</mi></mrow><mrow><mi>b</mi></mrow></msub><mo>→</mo><mi>ω</mi><mi>ϒ</mi><mo>(</mo><mn>1</mn><mi>S</mi><mo>)</mo></mrow></math> at <math><msqrt><mi>s</mi></msqrt></math> near 10.75 GeV

Author

Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D. M., Aushev, T., Aushev, V., Bae, H., Bambade, P., Banerjee, Sw., Baudot, J., Bauer, M., Beaubien, A., Becker, J., Behera, P. K., Bennett, J. V., Bernieri, E., Bernlochner, F. U., Bertacchi, V., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bhuyan, B., Bianchi, F., Bilka, T., Biswas, D., Bodrov, D., Bolz, A., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Chang, M.C., Cheema, P., Chekelian, V., Chen, Y. Q., Chilikin, K., Chirapatpimol, K., Cho, H.E., Cho, K., Cho, S.J., Choi, S.K., Choudhury, S., Cinabro, D., Corona, L., Cunliffe, S., Das, S., Dattola, F., De La Cruz-Burelo, E., De La Motte, S. A., De Nardo, G., De Nuccio, M., De Pietro, G., de Sangro, R., Destefanis, M., Dey, S., De Yta-Hernandez, A., Dhamija, R., Di Canto, A., Di Capua, F., Doležal, Z., Domínguez Jiménez, I., Dong, T. V., Dorigo, M., Dort, K., Dreyer, S., Dubey, S., Dujany, G., Eliachevitch, M., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finocchiaro, G., Fodor, A., Forti, F., Fulsom, B. G., Ganiev, E., Gaur, V., Gaz, A., Gellrich, A., Ghevondyan, G., Giordano, R., Giri, A., Glazov, A., Gobbo, B., Godang, R., Goldenzweig, P., Granderath, S., Graziani, E., Greenwald, D., Gu, T., Guan, Y., Gudkova, K., Guilliams, J., Hara, T., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Heredia de la Cruz, I., Hernández Villanueva, M., Hershenhorn, A., Higuchi, T., Hill, E. C., Hirata, H., Hohmann, M., Hsu, C.L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Iwasaki, M., Jackson, P., Jacobs, W. W., Jaffe, D. E., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Junkerkalefeld, H., Kaliyar, A. B., Kang, K. H., Karl, R., Karyan, G., Ketter, C., Kiesling, C., Kim, C.H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kindo, H., Kodyš, P., Koga, T., Kohani, S., Kojima, K., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T. M. G., Križan, P., Krokovny, P., Kumar, R., Kumara, K., Kunigo, T., Kuzmin, A., Kwon, Y.J., Lacaprara, S., Lam, T., Lanceri, L., Lange, J. S., Laurenza, M., Lautenbach, K., Leboucher, R., Lewis, P. M., Li, C., Li, L. K., Libby, J., Lieret, K., Liptak, Z., Liu, Q. Y., Liventsev, D., Longo, S., Lozar, A., Lueck, T., Lyu, C., Maggiora, M., Maiti, R., Manfredi, R., Manoni, E., Marcello, S., Marinas, C., Martel, L., Martini, A., Martinov, T., Massaccesi, L., Masuda, M., Matsuoka, K., Maurya, S. K., McKenna, J. A., Merola, M., Metzner, F., Milesi, M., Miller, C., Miyabayashi, K., Mizuk, R., Molina-Gonzalez, N., Moneta, S., Moser, H.G., Mrvar, M., Mussa, R., Nakamura, I., Nakao, M., Nakazawa, Y., Narimani Charan, A., Naruki, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nazaryan, G., Nisar, N. K., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Paladino, A., Panta, A., Paoloni, E., Pardi, S., Park, H., Park, S.H., Paschen, B., Passeri, A., Paul, S., Pedlar, T. K., Peruzzi, I., Peschke, R., Pestotnik, R., Piccolo, M., Piilonen, L. E., Podesta-Lerma, P. L. M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M. T., Purwar, H., Rad, N., Raiz, S., Ramirez Morales, A., Reif, M., Reiter, S., Remnev, M., Ripp-Baudot, I., Rizzo, G., Robertson, S. H., Roney, J. M., Rostomyan, A., Rout, N., Russo, G., Sanders, D. A., Sandilya, S., Sangal, A., Santelj, L., Sato, Y., Savinov, V., Scavino, B., Schueler, J., Schwanda, C., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sevior, M. E., Sfienti, C., Shen, C. P., Shi, X. D., Shillington, T., Sibidanov, A., Singh, J. B., Skorupa, J., Sobie, R. J., Soffer, A., Solovieva, E., Spataro, S., Starič, M., Stefkova, S., Stottler, Z. S., Stroili, R., Sue, Y., Sumihama, M., Sumisawa, K., Sutcliffe, W., Suzuki, S. Y., Svidras, H., Takizawa, M., Tanida, K., Tanigawa, H., Tenchini, F., Thaller, A., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Uchida, M., Ueda, I., Uematsu, Y., Uglov, T., Unger, K., Unno, Y., Uno, K., Uno, S., Ushiroda, Y., Vahsen, S. E., van Tonder, R., Varner, G. S., Vinokurova, A., Vitale, L., Vobbilisetti, V., Wakeling, H. M., Wang, E., Wang, M.Z., Warburton, A., Watanuki, S., Welsch, M., Wessel, C., Won, E., Xu, X. P., Yabsley, B. D., Yamada, S., Yan, W., Yang, S. B., Ye, H., Yelton, J., Yin, J. H., Yook, Y. M., Yoshihara, K., Yuan, C. Z., Zani, L., Zhang, Y., Zhou, X. Y., Zhukova, V. I., and Žlebčík, R.

Abstract

We study the processes e+e−→ωχbJ(1P) (J=0, 1, or 2) using samples at center-of-mass energies s=10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, and 4.7 fb−1 of integrated luminosity, respectively. These data were collected with the Belle II detector during special operations of the SuperKEKB collider above the ϒ(4S) resonance. We report the first observation of ωχbJ(1P) signals at s=10.745 GeV. By combining Belle II data with Belle results at s=10.867 GeV, we find energy dependencies of the Born cross sections for e+e−→ωχb1,b2(1P) to be consistent with the shape of the ϒ(10753) state. These data indicate that the internal structures of the ϒ(10753) and ϒ(10860) states may differ. Including data at s=10.653 GeV, we also search for the bottomonium equivalent of the X(3872) state decaying into ωϒ(1S). No significant signal is observed for masses between 10.45 and 10.65 GeV/c2.

Published
2023

33. Measurement of the <math><msup><mi>B</mi><mo>+</mo></msup><mo>/</mo><msup><mi>B</mi><mn>0</mn></msup></math> production ratio in <math><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>−</mo></msup></math> collisions at the <math><mi>ϒ</mi><mo>(</mo><mn>4</mn><mi>S</mi><mo>)</mo></math> resonance using <math><mi>B</mi><mo>→</mo><mi>J</mi><mo>/</mo><mi>ψ</mi><mo>(</mo><mo>ℓ</mo><mo>ℓ</mo><mo>)</mo><mi>K</mi></math> decays at Belle

Author

Choudhury, S., Sandilya, S., Trabelsi, K., Giri, A., Adachi, I., Aihara, H., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chen, C., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Cinabro, D., Das, S., De Pietro, G., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Epifanov, D., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Hara, T., Hayasaka, K., Hayashii, H., Hedges, M. T., Herrmann, D., Hou, W.S., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Kang, K. H., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kindo, H., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Laurenza, M., Lee, S. C., Lewis, P., Li, J., Li, L. K., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Nakamura, I., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, S.H., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prell, S., Prencipe, E., Prim, M. T., Rout, N., Russo, G., Sakai, Y., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Singh, J. B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Ushiroda, Y., Usov, Y., van Tonder, R., Varner, G., Varvell, K. E., Vinokurova, A., Vossen, A., Waheed, E., Wang, E., Wang, M.Z., Wang, X. L., Watanabe, M., Watanuki, S., Won, E., Xu, X., Yabsley, B. D., Yang, S. B., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhai, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We measure the ratio of branching fractions for the ϒ(4S) decays to B+B− and B0B¯0 using B+→J/ψ(ℓℓ)K+ and B0→J/ψ(ℓℓ)K0 samples, where J/ψ(ℓℓ) stands for J/ψ→ℓ+ℓ− (ℓ=e or μ), with 711 fb−1 of data collected at the ϒ(4S) resonance with the Belle detector. We find the decay rate ratio of ϒ(4S)→B+B− over ϒ(4S)→B0B¯0 to be 1.065±0.012±0.019±0.047, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in B→J/ψ(ℓℓ)K.

Published
2023

34. Measurement of the mass and width of the <math><msub><mi>Λ</mi><mi>c</mi></msub><mo>(</mo><mn>2625</mn><msup><mo>)</mo><mo>+</mo></msup></math> charmed baryon and the branching ratios of <math><mrow><msub><mrow><mi>Λ</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>(</mo><mn>2625</mn><msup><mrow><mo>)</mo></mrow><mrow><mo>+</mo></mrow></msup><mo>→</mo><msubsup><mrow><mi>Σ</mi></mrow><mrow><mi>c</mi></mrow><mrow><mn>0</mn></mrow></msubsup><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math> and <math><mrow><msub><mrow><mi>Λ</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>(</mo><mn>2625</mn><msup><mrow><mo>)</mo></mrow><mrow><mo>+</mo></mrow></msup><mo>→</mo><msubsup><mrow><mi>Σ</mi></mrow><mrow><mi>c</mi></mrow><mrow><mo>+</mo><mspace width='-0.1em'></mspace><mo>+</mo></mrow></msubsup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math>

Author

Wang, D., Yelton, J., Adachi, I., Ahn, J. K., Aihara, H., Asner, D. M., Atmacan, H., Ayad, R., Babu, V., Banerjee, Sw., Bauer, M., Behera, P., Belous, K., Bennett, J., Bessner, M., Bilka, T., Biswas, D., Bodrov, D., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chen, A., Cheon, B. G., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Doležal, Z., Dong, T. V., Dossett, D., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Han, X., Hayasaka, K., Hayashii, H., Hedges, M. T., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Jia, S., Jin, Y., Kaliyar, A. B., Kang, K. H., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Lee, S. C., Levit, D., Lewis, P., Li, L. K., Li, Y., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Lin, Y.R., Liventsev, D., Matsuda, T., Matvienko, D., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Mussa, R., Nakamura, I., Nakano, T., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shan, W., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Sokolov, A., Solovieva, E., Starič, M., Sumihama, M., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uno, S., van Tonder, R., Varner, G., Varvell, K. E., Vinokurova, A., Wang, M.Z., Wang, X. L., Watanabe, M., Watanuki, S., Werbycka, O., Won, E., Xu, X., Yabsley, B. D., Yan, W., Yang, S. B., Yin, J. H., Yuan, C. Z., Yuan, L., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

Using the entire data sample of 980 fb−1 collected at or near the ϒ(4S) resonance with the Belle detector operating at the KEKB asymmetric-energy e+e− collider, we report the measurement of the mass, width, and the branching ratios of the Λc(2625)+ charmed baryon. The mass difference between Λc(2625)+ and Λc+ is measured to be M(Λc(2625)+)−M(Λc+)=341.518±0.006±0.049 MeV/c2. The upper limit on the width is measured to be Γ(Λc(2625)+)<0.52 MeV/c2 at 90% confidence level. Based on a full Dalitz plot fit, branching ratios with respect to the mode Λc(2625)+→Λc+π+π− are measured to be B(Λc(2625)+→Σc0π+)B(Λc(2625)+→Λc+π+π−)=(5.19±0.23±0.40)% and B(Λc(2625)+→Σc++π−)B(Λc(2625)+→Λc+π+π−)=(5.13±0.26±0.32)%, where the first and second uncertainties are statistical and systematic, respectively. These measurements can be used to further constrain the parameters of the underlying theoretical models.

Published
2023

35. Measurement of the <math><mrow><msubsup><mrow><mi>Λ</mi></mrow><mrow><mi>c</mi></mrow><mrow><mo>+</mo></mrow></msubsup></mrow></math> Lifetime

Author

Abudinén, F., Aggarwal, L., Ahmed, H., Ahn, J. K., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D. M., Atmacan, H., Aushev, T., Aushev, V., Babu, V., Bae, H., Bambade, P., Banerjee, Sw., Bansal, S., Baudot, J., Bauer, M., Baur, A., Beaubien, A., Becker, J., Bennett, J. V., Bernieri, E., Bernlochner, F. U., Bertacchi, V., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bhardwaj, V., Bianchi, F., Bilka, T., Biswas, D., Bodrov, D., Bolz, A., Bonvicini, G., Bozek, A., Bračko, M., Branchini, P., Briere, R. A., Browder, T. E., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Cecchi, C., Chang, M.C., Chang, P., Cheaib, R., Cheema, P., Chen, C., Chen, Y. Q., Chen, Y.T., Cheon, B. G., Chilikin, K., Chirapatpimol, K., Cho, H.E., Cho, K., Cho, S.J., Choi, S.K., Choudhury, S., Cinabro, D., Corona, L., Cremaldi, L. M., Cunliffe, S., Dattola, F., De La Cruz-Burelo, E., De La Motte, S. A., De Nardo, G., De Nuccio, M., De Pietro, G., de Sangro, R., Destefanis, M., De Yta-Hernandez, A., Dhamija, R., Di Canto, A., Di Capua, F., Dingfelder, J., Doležal, Z., Domínguez Jiménez, I., Dong, T. V., Dorigo, M., Dort, K., Dossett, D., Dreyer, S., Dujany, G., Eliachevitch, M., Epifanov, D., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finocchiaro, G., Flood, K., Fodor, A., Forti, F., Frey, A., Fulsom, B. G., Gabrielli, A., Ganiev, E., Garcia-Hernandez, M., Gaz, A., Gellrich, A., Ghevondyan, G., Giordano, R., Giri, A., Glazov, A., Gobbo, B., Godang, R., Goldenzweig, P., Gradl, W., Granderath, S., Greenwald, D., Gu, T., Guan, Y., Gudkova, K., Guilliams, J., Halder, S., Hara, K., Hartbrich, O., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Heredia de la Cruz, I., Hernández Villanueva, M., Hershenhorn, A., Higuchi, T., Hohmann, M., Humair, T., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Itoh, R., Iwasaki, M., Iwasaki, Y., Jackson, P., Jacobs, W. W., Jaffe, D. E., Ji, Q. P., Jin, Y., Junkerkalefeld, H., Kaleta, M., Kandra, J., Kang, K. H., Karl, R., Karyan, G., Kiesling, C., Kim, C.H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kindo, H., Kinoshita, K., Kodyš, P., Koga, T., Kohani, S., Kojima, K., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T. M. G., Križan, P., Krokovny, P., Kuhr, T., Kumar, J., Kumar, R., Kumara, K., Kunigo, T., Kwon, Y.J., Lacaprara, S., Lam, T., Lanceri, L., Lange, J. S., Laurenza, M., Leboucher, R., Lee, S. C., Leitl, P., Levit, D., Li, L. K., Li, S. X., Li, Y. B., Libby, J., Liptak, Z., Liu, Q. Y., Liventsev, D., Longo, S., Lueck, T., Lyu, C., Maggiora, M., Maiti, R., Maity, S., Manfredi, R., Manoni, E., Marcello, S., Marinas, C., Martel, L., Martini, A., Massaccesi, L., Masuda, M., Matsuoka, K., Matvienko, D., McKenna, J. A., Meier, F., Merola, M., Milesi, M., Miller, C., Miyabayashi, K., Mohanty, G. B., Molina-Gonzalez, N., Moneta, S., Moon, H., Moser, H.G., Mrvar, M., Mussa, R., Nakamura, I., Nakao, M., Nakayama, H., Narimani Charan, A., Naruki, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nazaryan, G., Niebuhr, C., Nisar, N. K., Nishida, S., Nishimura, K., Ono, H., Oskin, P., Oxford, E. R., Pakhlova, G., Paladino, A., Panta, A., Paoloni, E., Pardi, S., Parham, K., Park, H., Park, S.H., Passeri, A., Pedlar, T. K., Peruzzi, I., Peschke, R., Pestotnik, R., Pham, F., Piilonen, L. E., Pinna Angioni, G., Podesta-Lerma, P. L. M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M. T., Purwar, H., Rad, N., Rados, P., Raiz, S., Reif, M., Reiter, S., Ripp-Baudot, I., Rizzo, G., Robertson, S. H., Roney, J. M., Rostomyan, A., Rout, N., Russo, G., Sanders, D. A., Sandilya, S., Sangal, A., Santelj, L., Sato, Y., Savinov, V., Scavino, B., Schwanda, C., Schwartz, A. J., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sfienti, C., Shen, C. P., Shillington, T., Shiu, J.G., Sibidanov, A., Simon, F., Sobie, R. J., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Starič, M., Stefkova, S., Stroili, R., Strube, J., Sumihama, M., Sumisawa, K., Sutcliffe, W., Suzuki, S. Y., Svidras, H., Takahashi, M., Takizawa, M., Tamponi, U., Tanaka, S., Tanida, K., Tanigawa, H., Taniguchi, N., Tenchini, F., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Uchida, M., Unger, K., Unno, Y., Uno, K., Uno, S., Urquijo, P., Ushiroda, Y., Vahsen, S. E., van Tonder, R., Varner, G. S., Varvell, K. E., Vinokurova, A., Vitale, L., Vobbilisetti, V., Waheed, E., Wakeling, H. M., Wang, E., Wang, M.Z., Wang, X. L., Warburton, A., Watanuki, S., Welsch, M., Wessel, C., Wiechczynski, J., Windel, H., Won, E., Xu, X. P., Yabsley, B. D., Yamada, S., Yang, S. B., Ye, H., Yelton, J., Yin, J. H., Yoshihara, K., Yusa, Y., Zhang, Y., Zhilich, V., Zhou, Q. D., Zhukova, V. I., and Žlebčík, R.

Abstract

An absolute measurement of the Λc+ lifetime is reported using Λc+→pK−π+ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the ϒ(4S) resonance, is 207.2 fb−1. The result, τ(Λc+)=203.20±0.89±0.77 fs, where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.

Published
2023

36. Search for rare decays <math><msup><mi>B</mi><mo>+</mo></msup><mo>→</mo><msubsup><mi>D</mi><mi>s</mi><mrow><mo>(</mo><mo>*</mo><mo>)</mo><mo>+</mo></mrow></msubsup><mi>η</mi></math>, <math><msubsup><mi>D</mi><mi>s</mi><mrow><mo>(</mo><mo>*</mo><mo>)</mo><mo>+</mo></mrow></msubsup><msup><mover><mi>K</mi><mo>¯</mo></mover><mn>0</mn></msup></math>, <math><msup><mi>D</mi><mo>+</mo></msup><mi>η</mi></math>, and <math><msup><mi>D</mi><mo>+</mo></msup><msup><mi>K</mi><mn>0</mn></msup></math>

Author

Kumar, M., Bhardwaj, V., Lalwani, K., Adachi, I., Aihara, H., Asner, D. M., Aushev, T., Babu, V., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chang, P., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., Dash, N., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Dossett, D., Epifanov, D., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Hara, T., Hayasaka, K., Hayashii, H., Hou, W.S., Hsu, C.L., Iijima, T., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Kalita, D., Kang, K. H., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Laurenza, M., Lee, S. C., Li, C. H., Li, J., Li, L. K., Li, Y., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Mrvar, M., Nakamura, I., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.H., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Purohit, M. V., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Singh, J. B., Solovieva, E., Starič, M., Stottler, Z. S., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Tsuboyama, T., Uchida, M., Unno, Y., Uno, S., van Tonder, R., Varner, G., Varvell, K. E., Vinokurova, A., Waheed, E., Wang, E., Wang, M.Z., Wang, X. L., Watanabe, M., Watanuki, S., Werbycka, O., Wiechczynski, J., Won, E., Yabsley, B. D., Yan, W., Yang, S. B., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhai, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We present a study of rare decay modes B+→Ds+h0, B+→Ds*+h0, and B+→D+h0, where h0 denotes the neutral meson η or K0, using a data sample of (772±10)×106 BB¯ events produced at the ϒ(4S) resonance. The data were collected by the Belle detector operating at the asymmetric-energy KEKB collider. We find no evidence for these decays, so we set upper limits at the 90% confidence level on the branching fractions of B+→Ds+h0, Ds*+h0, and D+h0 decay modes. Along with these rare decay modes, we report improved measurements of the color-suppressed decay branching fractions B(B¯0→D0η)=(26.6±1.2±2.1)×10−5 and B(B¯0→D0K¯0)=(5.6±0.5±0.2)×10−5. The first and second quoted uncertainties are statistical and systematic, respectively.

Published
2023

37. Measurement of the branching fraction of <math><msubsup><mi>Ξ</mi><mi>c</mi><mn>0</mn></msubsup><mo>→</mo><msubsup><mi>Λ</mi><mi>c</mi><mo>+</mo></msubsup><msup><mi>π</mi><mo>−</mo></msup></math> at Belle

Author

Tang, S. S., Li, Y. B., Shen, C. P., Adachi, I., Aihara, H., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Behera, P., Belous, K., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Budano, A., Červenkov, D., Chang, M.C., Chang, P., Chekelian, V., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Hayashii, H., Hedges, M. T., Herrmann, D., Hou, W.S., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jia, S., Jin, Y., Joo, K. K., Kang, K. H., Karyan, G., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kinoshita, K., Kodyš, P., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Lee, S. C., Li, J., Li, L. K., Li, Y., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Miyabayashi, K., Mizuk, R., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Pakhlova, G., Pardi, S., Park, S.H., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rout, N., Russo, G., Sakai, Y., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shiu, J.G., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Urquijo, P., Usov, Y., van Tonder, R., Varner, G., Vinokurova, A., Vossen, A., Waheed, E., Wang, E., Wang, M.Z., Watanabe, M., Won, E., Xu, X., Yabsley, B. D., Yan, W., Yang, S. B., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhai, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

Based on a data sample of 983 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, we present the study of the heavy-flavor-conserving decay Ξc0→Λc+π− with Λc+ reconstructed via its pK−π+ decay mode. The branching fraction ratio B(Ξc0→Λc+π−)/B(Ξc0→Ξ−π+) is measured to be 0.38±0.04±0.04. Combining with the world average value of B(Ξc0→Ξ−π+), the branching fraction B(Ξc0→Λc+π−) is deduced to be (0.54±0.05±0.05±0.12)%. Here, the uncertainties above are statistical, systematic, and from B(Ξc0→Ξ−π+), respectively.

Published
2023

38. Measurement of branching fractions of <math><mrow><msubsup><mrow><mi>Λ</mi></mrow><mrow><mi>c</mi></mrow><mrow><mo>+</mo></mrow></msubsup><mo>→</mo><mi>p</mi><msubsup><mrow><mi>K</mi></mrow><mrow><mi>S</mi></mrow><mrow><mn>0</mn></mrow></msubsup><msubsup><mrow><mi>K</mi></mrow><mrow><mi>S</mi></mrow><mrow><mn>0</mn></mrow></msubsup></mrow></math> and <math><msubsup><mi>Λ</mi><mi>c</mi><mo>+</mo></msubsup><mo>→</mo><mi>p</mi><msubsup><mi>K</mi><mi>S</mi><mn>0</mn></msubsup><mi>η</mi></math> at Belle

Author

Li, L. K., Kinoshita, K., Adachi, I., Ahn, J. K., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Banerjee, Sw., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhuyan, B., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Cho, S.J., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Golob, B., Gong, G., Graziani, E., Guan, Y., Gudkova, K., Hadjivasiliou, C., Halder, S., Han, X., Hayasaka, K., Hayashii, H., Hedges, M. T., Hou, W.S., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Kang, K. H., Kawasaki, T., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kodyš, P., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Lee, S. C., Li, C. H., Li, S. X., Li, Y., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Lin, Y.R., Liventsev, D., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mussa, R., Nakamura, I., Nakano, T., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, J., Passeri, A., Patra, S., Paul, S., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rostomyan, A., Rout, N., Russo, G., Sakai, Y., Sandilya, S., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Sevior, M. E., Shan, W., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Simon, F., Singh, J. B., Solovieva, E., Starič, M., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tang, S. S., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Urquijo, P., Vahsen, S. E., van Tonder, R., Varner, G., Varvell, K. E., Vinokurova, A., Vossen, A., Wang, D., Wang, M.Z., Wang, X. L., Watanabe, M., Watanuki, S., Werbycka, O., Wiechczynski, J., Won, E., Xu, X., Yabsley, B. D., Yan, W., Yang, S. B., Yelton, J., Yin, J. H., Yuan, C. Z., Yuan, L., Yusa, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We present a study of a singly Cabibbo-suppressed decay Λc+→pKS0KS0 and a Cabibbo-favored decay Λc+→pKS0η based on 980 fb−1 of data collected by the Belle detector, operating at the KEKB energy-asymmetric e+e− collider. We measure their branching fractions relative to Λc+→pKS0: B(Λc+→pKS0KS0)/B(Λc+→pKS0)=(1.48±0.08±0.04)×10−2 and B(Λc+→pKS0η)/B(Λc+→pKS0)=(2.73±0.06±0.13)×10−1. Combining with the world average B(Λc+→pKS0), we have the absolute branching fractions, B(Λc+→pKS0KS0)=(2.35±0.12±0.07±0.12)×10−4 and B(Λc+→pKS0η)=(4.35±0.10±0.20±0.22)×10−3. The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the uncertainty on B(Λc+→pKS0). The mode Λc+→pKS0KS0 is observed for the first time and has a statistical significance of >10σ. The branching fraction of Λc+→pKS0η has been measured with a threefold improvement in precision over previous results and is found to be consistent with the world average.

Published
2023

39. Measurement of the branching fractions for Cabibbo-suppressed decays <math><msup><mi>D</mi><mo>+</mo></msup><mo>→</mo><msup><mi>K</mi><mo>+</mo></msup><msup><mi>K</mi><mo>−</mo></msup><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mn>0</mn></msup></math> and <math><msubsup><mi>D</mi><mrow><mo>(</mo><mi>s</mi><mo>)</mo></mrow><mo>+</mo></msubsup><mo>→</mo><msup><mi>K</mi><mo>+</mo></msup><msup><mi>π</mi><mo>−</mo></msup><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mn>0</mn></msup></math> at Belle

Author

Li, L. K., Schwartz, A. J., Kinoshita, K., Won, E., Aihara, H., Al Said, S., Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bilka, T., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, P., Chen, A., Cheon, B. G., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Das, S., Dash, N., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Doležal, Z., Dong, T. V., Dossett, D., Epifanov, D., Frey, A., Fulsom, B. G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Greenwald, D., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Herrmann, D., Hou, W.S., Hsu, C.L., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jia, S., Jin, Y., Kalita, D., Kaliyar, A. B., Kang, K. H., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, K. T., Kim, Y.K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kuhr, T., Kumar, M., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.J., Lai, Y.T., Lam, T., Laurenza, M., Lee, S. C., Li, J., Li, Y., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Martini, A., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Moon, H. K., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.H., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shiu, J.G., Simon, F., Singh, J. B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Uno, K., Uno, S., Ushiroda, Y., Usov, Y., van Tonder, R., Varner, G., Varvell, K. E., Vossen, A., Waheed, E., Wang, E., Wang, M.Z., Wang, X. L., Watanuki, S., Werbycka, O., Wiechczynski, J., Yabsley, B. D., Yan, W., Yang, S. B., Ye, H., Yelton, J., Yin, J. H., Yuan, C. Z., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We present measurements of the branching fractions for the singly Cabibbo-suppressed decays D+→K+K−π+π0 and Ds+→K+π−π+π0, and the doubly Cabibbo-suppressed decay D+→K+π−π+π0, based on 980 fb−1 of data recorded by the Belle experiment at the KEKB e+e− collider. We measure these modes relative to the Cabibbo-favored modes D+→K−π+π+π0 and Ds+→K+K−π+π0. Our results for the ratios of branching fractions are B(D+→K+K−π+π0)/B(D+→K−π+π+π0)=(11.32±0.13±0.26)%, B(D+→K+π−π+π0)/B(D+→K−π+π+π0)=(1.68±0.11±0.03)%, and B(Ds+→K+π−π+π0)/B(Ds+→K+K−π+π0)=(17.13±0.62±0.51)%, where the uncertainties are statistical and systematic, respectively. The second value corresponds to (5.83±0.42)×tan4θC, where θC is the Cabibbo angle; this value is larger than other measured ratios of branching fractions for a doubly Cabibbo-suppressed charm decay to a Cabibbo-favored decay. Multiplying these results by world average values for B(D+→K−π+π+π0) and B(Ds+→K+K−π+π0) yields B(D+→K+K−π+π0)=(7.08±0.08±0.16±0.20)×10−3, B(D+→K+π−π+π0)=(1.05±0.07±0.02±0.03)×10−3, and B(Ds+→K+π−π+π0)=(9.44±0.34±0.28±0.32)×10−3, where the third uncertainty is due to the branching fraction of the normalization mode. The first two results are consistent with, but more precise than, the current world averages. The last result is the first measurement of this branching fraction.

Published
2023

40. First search for the weak radiative decays <math><msubsup><mi>Λ</mi><mi>c</mi><mo>+</mo></msubsup><mo>→</mo><msup><mi>Σ</mi><mo>+</mo></msup><mi>γ</mi></math> and <math><msubsup><mi>Ξ</mi><mi>c</mi><mn>0</mn></msubsup><mo>→</mo><msup><mi>Ξ</mi><mn>0</mn></msup><mi>γ</mi></math>

Author

Li, Y., Shen, C. P., Adachi, I., Aihara, H., Asner, D. M., Aulchenko, V., Aushev, T., Babu, V., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chang, P., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., Dash, N., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Dossett, D., Epifanov, D., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Hou, W.S., Hsu, C.L., Iijima, T., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Kang, K. H., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Laurenza, M., Lee, S. C., Li, C. H., Li, J., Li, L. K., Li, Y. B., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mrvar, M., Nakamura, I., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.H., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shiu, J.G., Singh, J. B., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Tsuboyama, T., Uchida, M., Unno, Y., Uno, S., van Tonder, R., Varner, G., Varvell, K. E., Vinokurova, A., Waheed, E., Wang, E., Wang, M.Z., Watanabe, M., Watanuki, S., Werbycka, O., Won, E., Yabsley, B. D., Yan, W., Yang, S. B., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhai, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We present the first search for the weak radiative decays Λc+→Σ+γ and Ξc0→Ξ0γ using a data sample of 980 fb−1 collected by the Belle detector operating at the KEKB asymmetric-energy e+e− collider. There are no evident Λc+→Σ+γ or Ξc0→Ξ0γ signals. Taking the decays Λc+→pK−π+ and Ξc0→Ξ−π+ as normalization channels, the upper limits at 90% credibility level on the ratios of branching fractions B(Λc+→Σ+γ)/B(Λc+→pK−π+)<4.0×10−3 and B(Ξc0→Ξ0γ)/B(Ξc0→Ξ−π+)<1.2×10−2 are determined. We obtain the upper limits at 90% credibility level on the absolute branching fractions B(Λc+→Σ+γ)<2.6×10−4 and B(Ξc0→Ξ0γ)<1.8×10−4.

Published
2023

41. Measurement of two-photon decay width of χ c2(1P) in γγ → χ c2(1P) → J/ψγ at Belle

Author

Seino, Y., Hayasaka, K., Uehara, S., Adachi, I., Aihara, H., Said, S., Asner, D., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chang, P., Chekelian, V., Chen, A., Cheon, B., Chilikin, K., Cho, H., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., Pietro, G., Dhamija, R., Capua, F., Dingfelder, J., Doležal, Z., Dong, T., Epifanov, D., Ferber, T., Ferlewicz, D., Fulsom, B., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Hadjivasiliou, C., Hayashii, H., Hou, W.S., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W., Jang, E.J., Jia, S., Jin, Y., Joo, K., Kakuno, H., Kang, K., Karyan, G., Kawasaki, T., Kiesling, C., Kim, C., Kim, D., Kim, K.H., Kim, Y.K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Lam, T., Lange, J., Lee, S., Li, C., Li, J., Li, L., Li, Y., Li Gioi, L., Libby, J., Lieret, K., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S., Meier, F., Merola, M., Miyabayashi, K., Miyata, H., Mizuk, R., Mohanty, G., Mrvar, M., Mussa, R., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.H., Patra, S., Paul, S., Pedlar, T., Pestotnik, R., Piilonen, L., Podobnik, T., Prencipe, E., Prim, M., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Senyo, K., Sevior, M., Shapkin, M., Sharma, C., Shen, C., Shiu, J.G., Singh, J., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z., Strube, J., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., Tonder, R., Varner, G., Vinokurova, A., Waheed, E., Wang, E., Wang, M.Z., Wang, X., Watanabe, M., Watanuki, S., Won, E., Yabsley, B., Yan, W., Yang, S., Yin, J., Yuan, C., Yusa, Y., Zhai, Y., Zhang, Z., Zhilich, V., Zhukova, V., and Zhulanov, V.

Subjects
Nuclear and High Energy Physics
Abstract

We report the measurement of the two-photon decay width of χc2(1P) in two-photon processes at the Belle experiment. We analyze the process γγ → χc2(1P) → 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 χc2(1P) and the branching fraction is determined to be $$ {\Gamma}_{\gamma \gamma}\left({\chi}_{c2}(1P)\right)\mathcal{B}\left({\chi}_{c2}(1P)\to J/\psi \gamma \right)\mathcal{B}\left(J/\psi \to {\ell}^{+}{\ell}^{-}\right)=14.8\pm 0.3\left(\textrm{stat}.\right)\pm 0.7\left(\textrm{syst}.\right) $$ 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 Γγγ(χc2(1P)) = 653 ± 13(stat.) ± 31(syst.) ± 17(B.R.) eV, where the third uncertainty is from $$ \mathcal{B} $$ B (χc2(1P) → J/ψγ) and $$ \mathcal{B} $$ B (J/ψ → ℓ+ℓ−).

Published
2023

42. Study of <math><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>−</mo></msup><mo>→</mo><mi>η</mi><mi>ϕ</mi></math> via initial state radiation at Belle

Author

Zhu, W. J., Gao, B. S., Wang, X. L., Adachi, I., Aihara, H., Asner, D. M., Atmacan, H., Aushev, T., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chen, A., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Epifanov, D., Ferlewicz, D., Fulsom, B. G., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Halder, S., Hara, T., Hayasaka, K., Hayashii, H., Hsu, C.L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Kang, K. H., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.J., Lalwani, K., Lam, T., Laurenza, M., Lee, S. C., Li, J., Li, L. K., Li, Y., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Merola, M., Miyabayashi, K., Mizuk, R., Nakao, M., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N. K., Nishida, S., Ono, H., Pakhlova, G., Pardi, S., Park, S.H., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prim, M. T., Rout, N., Russo, G., Sandilya, S., Sangal, A., Santelj, L., Savinov, V., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shiu, J.G., Solovieva, E., Stanič, S., Starič, M., Stottler, Z. S., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Vahsen, S. E., van Tonder, R., Varner, G., Vossen, A., Waheed, E., Wang, E., Wang, M.Z., Watanabe, M., Watanuki, S., Won, E., Yan, W., Yang, S. B., Yin, J. H., Yuan, C. Z., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

Using 980 fb−1 of data collected on and around the ϒ(nS) (n=1, 2, 3, 4, 5) resonances with the Belle detector at the KEKB collider, we measure the cross section of e+e−→ηϕ from threshold to 3.95 GeV via initial state radiation. There are clear ϕ(1680) and J/ψ signals but no significant ϕ(2170) signal in the ηϕ final state. The branching fraction B[J/ψ→ηϕ] is measured to be (7.2±0.8±0.5)×10−4. The resonant parameters of ϕ(1680) are determined to be mϕ(1680)=(1696±8±10) MeV/c2 (statistical and systematic errors, respectively), Γϕ(1680)=(175±13±16) MeV and, depending on the possible presence of predominantly constructive or destructive interference between ϕ(1680) and continuum production, Γϕ(1680)e+e−·B[ϕ(1680)→ηϕ] and B[ϕ(1680)→ηϕ] are determined to be (75±10±11) eV and (25±12±2)% or (207±16±20) eV and (23±10±2)%, respectively. The upper limit for Γϕ(2170)e+e−·B[ϕ(2170)→ηϕ] is determined to be either 0.17 or 18.6 eV at the 90% confidence level.

Published
2023

43. Measurements of the branching fractions <math><mi>B</mi><mo>(</mo><msup><mover><mi>B</mi><mo>¯</mo></mover><mn>0</mn></msup><mo>→</mo><msup><mi>D</mi><mrow><mo>*</mo><mo>+</mo></mrow></msup><msup><mi>π</mi><mo>−</mo></msup><mo>)</mo></math> and <math><mi>B</mi><mo>(</mo><msup><mover><mi>B</mi><mo>¯</mo></mover><mn>0</mn></msup><mo>→</mo><msup><mi>D</mi><mrow><mo>*</mo><mo>+</mo></mrow></msup><msup><mi>K</mi><mo>−</mo></msup><mo>)</mo></math> and tests of QCD factorization

Author

Krohn, J.F., Ferlewicz, D., Urquijo, P., Adachi, I., Aihara, H., Al Said, S., Asner, D.M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T.E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chang, P., Chekelian, V., Chen, A., Cheon, B.G., Chilikin, K., Cho, H.E., Cho, K., Cho, S.J., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Das, S., Dash, N., De Nardo, G., De Pietro, G., Dhamija, R., Di Capua, F., Doležal, Z., Dong, T.V., Epifanov, D., Ferber, T., Fulsom, B.G., Garg, R., Gaur, V., Gabyshev, N., Goldenzweig, P., Golob, B., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Hara, T., Hayasaka, K., Hayashii, H., Hou, W.S., Hsu, C.L., Inami, K., Ishikawa, A., Iwasaki, M., Iwasaki, Y., Jacobs, W.W., Jang, E.J., Jia, S., Jin, Y., Joo, K.K., Kahn, J., Kaliyar, A.B., Kang, K.H., Kawasaki, T., Kichimi, H., Kiesling, C., Kim, C.H., Kim, D.Y., Kim, Y.K., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Laurenza, M., Lee, S.C., Li, J., Li, L.K., Li, Y.B., Li Gioi, L., Libby, J., Liventsev, D., Martini, A., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S.K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G.B., Mussa, R., Nakao, M., Narwal, D., Natkaniec, Z., Natochii, A., Nayak, L., Nisar, N.K., Nishida, S., Nishimura, K., Ogawa, K., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pang, T., Pardi, S., Park, S.H., Patra, S., Pedlar, T.K., Pestotnik, R., Piilonen, L.E., Podobnik, T., Popov, V., Prim, M.T., Röhrken, M., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., Sandilya, S., Sangal, A., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M.E., Shapkin, M., Sharma, C., Shebalin, V., Shen, C.P., Shiu, J.G., Shwartz, B., Simon, F., Solovieva, E., Stanič, S., Starič, M., Stottler, Z.S., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Unno, Y., Uno, K., Uno, S., Vahsen, S.E., van Tonder, R., Varner, G., Varvell, K.E., Vinokurova, A., Waheed, E., Wang, E., Wang, M.Z., Wang, X.L., Watanuki, S., Won, E., Yan, W., Ye, H., Yelton, J., Yin, J.H., Yusa, Y., Zhai, Y., Zhilich, V., and Zhukova, V.

Abstract

Using (771.6±10.6)×106 BB¯ meson pairs recorded by the Belle experiment at the KEKB e+e− collider, we report the branching fractions B(B¯0→D*+π−)=(2.62±0.02±0.09)×10−3 and B(B¯0→D*+K−)=(2.22±0.06±0.08)×10−4; the quoted uncertainties are statistical and systematic, respectively. A measurement of the ratio of these branching fractions is also presented, RK/π=B(B¯→D*+K−)/B(B¯→D*+π−)=(8.41±0.24±0.13)×10−2, where systematic uncertainties due to the D*+ meson reconstruction cancel out. Furthermore, we report a new QCD factorization test based on the measured ratios for B¯→D*+h− and B¯→D*+ℓ−ν decays at squared momentum transfer values equivalent to the mass of the h=π or K hadron. The parameters |a1(h)| are measured to be |a1(π)|=0.884±0.004±0.003±0.016 and |a1(K)|=0.913±0.019±0.008±0.013, where the last uncertainties account for all external inputs. These values are approximately 15% lower than those expected from theoretical predictions. Subsequently, flavor SU(3) symmetry is tested by measuring the ratios for pions and kaons, |a1(K)|2/|a1(π)|2=1.066±0.042±0.018±0.023, as well as for different particle species. The ratio is consistent with unity and therefore no evidence for SU(3) symmetry breaking effects is found at the 5% precision level.

Published
2023

44. Evidence of a New Excited Charmed Baryon Decaying to <math><mrow><msub><mrow><mi>Σ</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>(</mo><mn>2455</mn><msup><mrow><mo>)</mo></mrow><mrow><mn>0</mn><mo>,</mo><mo>+</mo><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>±</mo></mrow></msup></mrow></math>

Author

Li, Y. B., Shen, C. P., Adachi, I., Aihara, H., Asner, D. M., Atmacan, H., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M.C., Chang, P., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Dossett, D., Epifanov, D., Fulsom, B. G., Garg, R., Gaur, V., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Guan, Y., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Hou, W.S., Hsu, C.L., Iijima, T., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Karyan, G., Kawasaki, T., Kichimi, H., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kindo, H., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Kwon, Y.J., Lam, T., Lange, J. S., Laurenza, M., Lee, S. C., Li, C. H., Li, J., Li, L. K., Li, Y., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Nakamura, I., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Niiyama, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.H., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rout, N., Russo, G., Sandilya, S., Santelj, L., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shiu, J.G., Singh, J. B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Tsuboyama, T., Uchida, M., Uglov, T., Unno, Y., Uno, S., Usov, Y., van Tonder, R., Varner, G., Varvell, K. E., Waheed, E., Wang, E., Wang, M.Z., Watanabe, M., Watanuki, S., Werbycka, O., Wiechczynski, J., Won, E., Yabsley, B. D., Yan, W., Yang, S. B., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhai, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We present the study of B¯0→Σc(2455)0,++π±p¯ decays based on 772×106 BB¯ events collected with the Belle detector at the KEKB asymmetric-energy e+e− collider. The Σc(2455)0,++ candidates are reconstructed via their decay to Λc+π∓ and Λc+ decays to pK−π+, pKS0, and Λπ+ final states. The corresponding branching fractions are measured to be B(B¯0→Σc(2455)0π+p¯)=(1.09±0.06±0.07)×10−4 and B(B¯0→Σc(2455)++π−p¯)=(1.84±0.11±0.12)×10−4, which are consistent with the world average values with improved precision. A new structure is found in the MΣc(2455)0,++π± spectrum with a significance of 4.2σ including systematic uncertainty. The structure is possibly an excited Λc+ and is tentatively named Λc(2910)+. Its mass and width are measured to be (2913.8±5.6±3.8) MeV/c2 and (51.8±20.0±18.8) MeV, respectively. The products of branching fractions for the Λc(2910)+ are measured to be B(B¯0→Λc(2910)+p¯)×B(Λc(2910)+→Σc(2455)0π+)=(9.5±3.6±1.6)×10−6 and B(B¯0→Λc(2910)+p¯)×B(Λc(2910)+→Σc(2455)++π−)=(1.24±0.35±0.10)×10−5. Here, the first and second uncertainties are statistical and systematic, respectively.

Published
2023

45. Search for the weak decay *

Author

Ablikim, M., Achasov, M.N., Adlarson, P., Albrecht, M., Aliberti, R., Amoroso, A., An, M.R., An, Q., Bai, X.H., Bai, Y., Bakina, O., Baldini Ferroli, R., Balossino, I., Ban, Y., Batozskaya, V., Becker, D., Begzsuren, K., Berger, N., Bertani, M., Bettoni, D., Bianchi, F., Bloms, J., Bortone, A., Boyko, I., Briere, R.A., Brueggemann, A., Cai, H., Cai, X., Calcaterra, A., Cao, G.F., Cao, N., Cetin, S.A., Chang, J.F., Chang, W.L., Chelkov, G., Chen, C., Chen, Chao, Chen, G., Chen, H.S., Chen, M.L., Chen, S.J., Chen, S.M., Chen, T., Chen, X.R., Chen, X.T., Chen, Y.B., Chen, Z.J., Cheng, W.S., Chu, X., Cibinetto, G., Cossio, F., Cui, J.J., Dai, H.L., Dai, J.P., Dbeyssi, A., de Boer, R.E., Dedovich, D., Deng, Z.Y., Denig, A., Denysenko, I., Destefanis, M., De Mori, F., Ding, Y., Dong, J., Dong, L.Y., Dong, M.Y., Dong, X., Du, S.X., Egorov, P., Fan, Y.L., Fang, J., Fang, S.S., Fang, W.X., Fang, Y., Farinelli, R., Fava, L., Feldbauer, F., Felici, G., Feng, C.Q., Feng, J.H., Fischer, K, Fritsch, M., Fritzsch, C., Fu, C.D., Gao, H., Gao, Y.N., Gao, Yang, Garbolino, S., Garzia, I., Ge, P.T., Ge, Z.W., Geng, C., Gersabeck, E.M., Gilman, A, Goetzen, K., Gong, L., Gong, W.X., Gradl, W., Greco, M., Gu, L.M., Gu, M.H., Gu, Y.T., Y Guan, C., Guo, A.Q., Guo, L.B., Guo, R.P., Guo, Y.P., Guskov, A., Han, T.T., Han, W.Y., Hao, X.Q., Harris, F.A., He, K.K., He, K.L., Heinsius, F.H., Heinz, C.H., Heng, Y.K., Herold, C., Himmelreich, M., Hou, G.Y., Hou, Y.R., Hou, Z.L., Hu, H.M., Hu, J.F., Hu, T., Hu, Y., Huang, G.S., Huang, K.X., Huang, L.Q., Huang, X.T., Huang, Y.P., Huang, Z., Hussain, T., Hüsken, N, Imoehl, W., Irshad, M., Jackson, J., Jaeger, S., Janchiv, S., Ji, Q., Ji, Q.P., Ji, X.B., Ji, X.L., Ji, Y.Y., Jia, Z.K., Jiang, H.B., Jiang, S.S., Jiang, X.S., Jiang, Y., Jiao, J.B., Jiao, Z., Jin, S., Jin, Y., Jing, M.Q., Johansson, T., Kalantar-Nayestanaki, N., Kang, X.S., Kappert, R., Ke, B.C., Keshk, I.K., Khoukaz, A., Kiese, P., Kiuchi, R., Kliemt, R., Koch, L., Kolcu, O.B., Kopf, B., Kuemmel, M., Kuessner, M., Kupsc, A., Kühn, W., Lane, J.J., Lange, J.S., Larin, P., Lavania, A., Lavezzi, L., Lei, Z.H., Leithoff, H., Lellmann, M., Lenz, T., Li, C., Li, C.H., Li, Cheng, Li, D.M., Li, F., Li, G., Li, H., Li, H.B., Li, H.J., Li, H.N., Li, J.Q., Li, J.S., Li, J.W., Li, Ke, Li, L.J., Li, L.K., Li, Lei, Li, M.H., Li, P.R., Li, S.X., Li, S.Y., Li, T., Li, W.D., Li, W.G., Li, X.H., Li, X.L., Li, Xiaoyu, Liang, H., Liang, Y.F., Liang, Y.T., Liao, G.R., Liao, L.Z., Libby, J., Limphirat, A., Lin, C.X., Lin, D.X., Lin, T., Liu, B.J., Liu, C.X., Liu, D., Liu, F.H., Liu, Fang, Liu, Feng, Liu, G.M., Liu, H., Liu, H.B., Liu, H.M., Liu, Huanhuan, Liu, Huihui, Liu, J.B., Liu, J.L., Liu, J.Y., Liu, K., Liu, K.Y., Liu, Ke, Liu, L., Liu, Lu, Liu, M.H., Liu, P.L., Liu, Q., Liu, S.B., Liu, T., Liu, W.K., Liu, W.M., Liu, X., Liu, Y., Liu, Y.B., Liu, Z.A., Liu, Z.Q., Lou, X.C., Lu, F.X., Lu, H.J., Lu, J.G., Lu, X.L., Lu, Y., Lu, Y.P., Lu, Z.H., Luo, C.L., Luo, M.X., Luo, T., Luo, X.L., Lyu, X.R., Lyu, Y.F., Ma, F.C., Ma, H.L., Ma, L.L., Ma, M.M., Ma, Q.M., Ma, R.Q., Ma, R.T., Ma, X.Y., Ma, Y., Maas, F.E., Maggiora, M., Maldaner, S., Malde, S., Malik, Q.A., Mangoni, A., Mao, Y.J., Mao, Z.P., Marcello, S., Meng, Z.X., Messchendorp, J.G., Mezzadri, G., Miao, H., Min, T.J., Mitchell, R.E., Mo, X.H., Muchnoi, N. Yu., Nefedov, Y., Nerling, F., Nikolaev, I.B., Ning, Z., Nisar, S., Niu, Y., Olsen, S.L., Ouyang, Q., Pacetti, S., Pan, X., Pan, Y., Pathak, A., Pelizaeus, M., Peng, H.P., Peters, K., Ping, J.L., Ping, R.G., Plura, S., Pogodin, S., Prasad, V., Qi, F.Z., Qi, H., Qi, H.R., Qi, M., Qi, T.Y., Qian, S., Qian, W.B., Qian, Z., Qiao, C.F., Qin, J.J., Qin, L.Q., Qin, X.P., Qin, X.S., Qin, Z.H., Qiu, J.F., Qu, S.Q., Rashid, K.H., Redmer, C.F., Ren, K.J., Rivetti, A., Rodin, V., Rolo, M., Rong, G., Rosner, Ch., Ruan, S.N., Sang, H.S., Sarantsev, A., Schelhaas, Y., Schnier, C., Schoenning, K., Scodeggio, M., Shan, K.Y., Shan, W., Shan, X.Y., Shangguan, J.F., Shao, L.G., Shao, M., Shen, C.P., Shen, H.F., Shen, X.Y., Shi, B.A., Shi, H.C., Shi, J.Y., Shi, q. q., Shi, R.S., Shi, X., D Shi, X., Song, J.J., Song, W.M., Song, Y.X., Sosio, S., Spataro, S., Stieler, F., Su, K.X., Su, P.P., Su, Y.J., Sun, G.X., Sun, H., Sun, H.K., Sun, J.F., Sun, L., Sun, S.S., Sun, T., Sun, W.Y., Sun, X, Sun, Y.J., Sun, Y.Z., Sun, Z.T., Tan, Y.H., Tan, Y.X., Tang, C.J., Tang, G.Y., Tang, J., Y Tao, L., Tao, Q.T., Tat, M., Teng, J.X., Thoren, V., Tian, W.H., Tian, Y., Uman, I., Wang, B., Wang, B.L., Wang, C.W., Wang, D.Y., Wang, F., Wang, H.J., Wang, H.P., Wang, K., Wang, L.L., Wang, M., Wang, M.Z., Wang, Meng, Wang, S., Wang, T., Wang, T.J., Wang, W., Wang, W.H., Wang, W.P., Wang, X., Wang, X.F., Wang, X.L., Wang, Y., Wang, Y.D., Wang, Y.F., Wang, Y.H., Wang, Y.Q., Wang, Yaqian, Wang, Z., Wang, Z.Y., Wang, Ziyi, Wei, D.H., Weidner, F., Wen, S.P., White, D.J., Wiedner, U., Wilkinson, G., Wolke, M., Wollenberg, L., Wu, J.F., Wu, L.H., Wu, L.J., Wu, X., Wu, X.H., Wu, Y., Wu, Z., Xia, L., Xiang, T., Xiao, D., Xiao, G.Y., Xiao, H., Xiao, S.Y., Xiao, Y.L., Xiao, Z.J., Xie, C., Xie, X.H., Xie, Y., Xie, Y.G., Xie, Y.H., Xie, Z.P., Xing, T.Y., Xu, C.F., Xu, C.J., Xu, G.F., Xu, H.Y., Xu, Q.J., Xu, X.P., Xu, Y.C., Xu, Z.P., Yan, F., Yan, L., Yan, W.B., Yan, W.C., Yang, H.J., Yang, H.L., Yang, H.X., Yang, L., Yang, S.L., Yang, Tao, Yang, Y.F., Yang, Y.X., Yang, Yifan, Ye, M., Ye, M.H., Yin, J.H., You, Z.Y., Yu, B.X., Yu, C.X., Yu, G., Yu, T., Yuan, C.Z., Yuan, L., Yuan, S.C., Yuan, X.Q., Yuan, Y., Yuan, Z.Y., Yue, C.X., Zafar, A.A., Zeng, F.R., Zeng, X., Zeng, Y., Zhan, Y.H., Zhang, A.Q., Zhang, B.L., Zhang, B.X., Zhang, D.H., Zhang, G.Y., Zhang, H., Zhang, H.H., Zhang, H.Y., Zhang, J.L., Zhang, J.Q., Zhang, J.W., Zhang, J.X., Zhang, J.Y., Zhang, J.Z., Zhang, Jianyu, Zhang, Jiawei, Zhang, L.M., Zhang, L.Q., Zhang, Lei, Zhang, P., Zhang, Q.Y., Zhang, Shuihan, Zhang, Shulei, Zhang, X.D., Zhang, X.M., Zhang, X.Y., Zhang, Y., Zhang, Y.T., Zhang, Y.H., Zhang, Yan, Zhang, Yao, Zhang, Z.H., Zhang, Z.Y., Zhao, G., Zhao, J., Zhao, J.Y., Zhao, J.Z., Zhao, Lei, Zhao, Ling, Zhao, M.G., Zhao, Q., Zhao, S.J., Zhao, Y.B., Zhao, Y.X., Zhao, Z.G., Zhemchugov, A., Zheng, B., Zheng, J.P., Zheng, Y.H., Zhong, B., Zhong, C., Zhong, X., Zhou, H., Zhou, L.P., Zhou, X., Zhou, X.K., Zhou, X.R., Zhou, X.Y., Zhou, Y.Z., Zhu, J., Zhu, K., Zhu, K.J., Zhu, L.X., Zhu, S.H., Zhu, S.Q., Zhu, T.J., Zhu, W.J., Zhu, Y.C., Zhu, Z.A., Zou, B.S., Zou, J.H., and (BESIII Collaboration)

Subjects
Nuclear and High Energy Physics, Astronomy and Astrophysics, BESIII detector, weak decay, Instrumentation, upper limit
Abstract

Using events collected with the BESIII detector, we perform the first search for the weak baryonic decay . The analysis procedure is optimized using a blinded method. No significant signal is observed, and the upper limit on the branching fraction ( ) of is set as at the 90% confidence level.

Published
2023

46. Search for an Invisible Z′ in a Final State with Two Muons and Missing Energy at Belle II

Author

Adachi, I., Adamczyk, K., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D. M., Aushev, T., Aushev, V., Bae, H., Bahinipati, S., Bambade, P., Banerjee, Sw., Baudot, J., Bauer, M., Baur, A., Beaubien, A., Becker, J., Behera, P. K., Bennett, J. V., Bernieri, E., Bernlochner, F. U., Bertacchi, V., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bhuyan, B., Bianchi, F., Bilka, T., Biswas, D., Bodrov, D., Bolz, A., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Cecchi, C., Chang, M.C., Chang, P., Cheaib, R., Cheema, P., Chekelian, V., Chen, C., Chen, Y. Q., Cheon, B. G., Chilikin, K., Chirapatpimol, K., Cho, H.E., Cho, K., Cho, S.J., Choi, S.K., Choudhury, S., Cinabro, D., Corona, L., Cunliffe, S., Das, S., Dattola, F., De La Cruz-Burelo, E., De La Motte, S. A., De Nardo, G., De Nuccio, M., De Pietro, G., de Sangro, R., Destefanis, M., Dey, S., De Yta-Hernandez, A., Dhamija, R., Di Canto, A., Di Capua, F., Dingfelder, J., Doležal, Z., Domínguez Jiménez, I., Dong, T. V., Dorigo, M., Dort, K., Dossett, D., Dreyer, S., Dubey, S., Dujany, G., Ecker, P., Eliachevitch, M., Epifanov, D., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finck, C., Finocchiaro, G., Fodor, A., Forti, F., Fulsom, B. G., Ganiev, E., Garcia-Hernandez, M., Gaur, V., Gaz, A., Gellrich, A., Ghevondyan, G., Giordano, R., Giri, A., Glazov, A., Gobbo, B., Godang, R., Goldenzweig, P., Granderath, S., Graziani, E., Greenwald, D., Gruberová, Z., Gu, T., Gudkova, K., Guilliams, J., Haigh, H., Hara, T., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Heredia de la Cruz, I., Hernández Villanueva, M., Hershenhorn, A., Higuchi, T., Hill, E. C., Hohmann, M., Hsu, C.L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Itoh, R., Iwasaki, M., Jackson, P., Jacobs, W. W., Jaffe, D. E., Jang, E.J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Junkerkalefeld, H., Kakuno, H., Kaliyar, A. B., Kang, K. H., Kang, S., Karl, R., Karyan, G., Kiesling, C., Kim, C.H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kindo, H., Kinoshita, K., Kodyš, P., Koga, T., Kohani, S., Kojima, K., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T. M. G., Križan, P., Krokovny, P., Kuhr, T., Kumar, J., Kumara, K., Kunigo, T., Kuzmin, A., Kwon, Y.J., Lacaprara, S., Lam, T., Lanceri, L., Lange, J. S., Laurenza, M., Lautenbach, K., Leboucher, R., Le Diberder, F. R., Leitl, P., Li, C., Li, L. K., Libby, J., Lieret, K., Liptak, Z., Liu, Q. Y., Liventsev, D., Longo, S., Lozar, A., Lueck, T., Luo, T., Lyu, C., Maggiora, M., Maiti, R., Maity, S., Manfredi, R., Manoni, E., Marcello, S., Marinas, C., Martel, L., Martini, A., Martinov, T., Massaccesi, L., Masuda, M., Matsuoka, K., Matvienko, D., Maurya, S. K., McKenna, J. A., Meier, F., Merola, M., Metzner, F., Milesi, M., Miller, C., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Molina-Gonzalez, N., Moneta, S., Moser, H.G., Mrvar, M., Mussa, R., Nakamura, I., Nakamura, K. R., Nakao, M., Nakayama, H., Nakazawa, Y., Narimani Charan, A., Naruki, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nazaryan, G., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Paladino, A., Panta, A., Paoloni, E., Pardi, S., Parham, K., Park, H., Park, S.H., Paschen, B., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Peruzzi, I., Peschke, R., Pestotnik, R., Piccolo, M., Piilonen, L. E., Pinna Angioni, G., Podesta-Lerma, P. L. M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M. T., Purwar, H., Rad, N., Rados, P., Raeuber, G., Raiz, S., Ramirez Morales, A., Reif, M., Reiter, S., Remnev, M., Ripp-Baudot, I., Rizzo, G., Robertson, S. H., Rodríguez Pérez, D., Roney, J. M., Rostomyan, A., Rout, N., Russo, G., Sanders, D. A., Sandilya, S., Sangal, A., Santelj, L., Sato, Y., Savinov, V., Scavino, B., Schueler, J., Schwanda, C., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sevior, M. E., Sfienti, C., Shen, C. P., Shillington, T., Shiu, J.G., Sibidanov, A., Simon, F., Singh, J. B., Skorupa, J., Sobie, R. J., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Starič, M., Stefkova, S., Stottler, Z. S., Stroili, R., Strube, J., Sue, Y., Sumihama, M., Sumisawa, K., Sutcliffe, W., Suzuki, S. Y., Svidras, H., Takizawa, M., Tamponi, U., Tanida, K., Tanigawa, H., Taniguchi, N., Tenchini, F., Thaller, A., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Uchida, M., Ueda, I., Uematsu, Y., Uglov, T., Unger, K., Unno, Y., Uno, K., Uno, S., Ushiroda, Y., Vahsen, S. E., van Tonder, R., Varvell, K. E., Vinokurova, A., Vitale, L., Vobbilisetti, V., Wakeling, H. M., Wang, E., Wang, M.Z., Wang, X. L., Warburton, A., Watanabe, M., Watanuki, S., Welsch, M., Wessel, C., Xu, X. P., Yabsley, B. D., Yamada, S., Yan, W., Yang, S. B., Ye, H., Yin, J. H., Yook, Y. M., Yoshihara, K., Yuan, C. Z., Yusa, Y., Zani, L., Zhang, Y., Zhilich, V., Zhou, Q. D., Zhou, X. Y., Zhukova, V. I., Žlebčík, R., Adachi, I., Adamczyk, K., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., Anh Ky, N., Asner, D. M., Aushev, T., Aushev, V., Bae, H., Bahinipati, S., Bambade, P., Banerjee, Sw., Baudot, J., Bauer, M., Baur, A., Beaubien, A., Becker, J., Behera, P. K., Bennett, J. V., Bernieri, E., Bernlochner, F. U., Bertacchi, V., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bhuyan, B., Bianchi, F., Bilka, T., Biswas, D., Bodrov, D., Bolz, A., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Cecchi, C., Chang, M. -C., Chang, P., Cheaib, R., Cheema, P., Chekelian, V., Chen, C., Chen, Y. Q., Cheon, B. G., Chilikin, K., Chirapatpimol, K., Cho, H. -E., Cho, K., Cho, S. -J., Choi, S. -K., Choudhury, S., Cinabro, D., Corona, L., Cunliffe, S., Das, S., Dattola, F., De La Cruz-Burelo, E., De La Motte, S. A., De Nardo, G., De Nuccio, M., De Pietro, G., de Sangro, R., Destefanis, M., Dey, S., De Yta-Hernandez, A., Dhamija, R., Di Canto, A., Di Capua, F., Dingfelder, J., Doležal, Z., Domínguez Jiménez, I., Dong, T. V., Dorigo, M., Dort, K., Dossett, D., Dreyer, S., Dubey, S., Dujany, G., Ecker, P., Eliachevitch, M., Epifanov, D., Feichtinger, P., Ferber, T., Ferlewicz, D., Fillinger, T., Finck, C., Finocchiaro, G., Fodor, A., Forti, F., Fulsom, B. G., Ganiev, E., Garcia-Hernandez, M., Gaur, V., Gaz, A., Gellrich, A., Ghevondyan, G., Giordano, R., Giri, A., Glazov, A., Gobbo, B., Godang, R., Goldenzweig, P., Granderath, S., Graziani, E., Greenwald, D., Gruberová, Z., Gu, T., Gudkova, K., Guilliams, J., Haigh, H., Hara, T., Hayasaka, K., Hayashii, H., Hazra, S., Hearty, C., Heredia de la Cruz, I., Hernández Villanueva, M., Hershenhorn, A., Higuchi, T., Hill, E. C., Hohmann, M., Hsu, C. -L., Iijima, T., Inami, K., Inguglia, G., Ipsita, N., Ishikawa, A., Ito, S., Itoh, R., Iwasaki, M., Jackson, P., Jacobs, W. W., Jaffe, D. E., Jang, E. -J., Ji, Q. P., Jia, S., Jin, Y., Joo, K. K., Junkerkalefeld, H., Kakuno, H., Kaliyar, A. B., Kang, K. H., Kang, S., Karl, R., Karyan, G., Kiesling, C., Kim, C. -H., Kim, D. Y., Kim, K. -H., Kim, Y. -K., Kindo, H., Kinoshita, K., Kodyš, P., Koga, T., Kohani, S., Kojima, K., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Kowalewski, R., Kraetzschmar, T. M. G., Križan, P., Krokovny, P., Kuhr, T., Kumar, J., Kumara, K., Kunigo, T., Kuzmin, A., Kwon, Y. -J., Lacaprara, S., Lam, T., Lanceri, L., Lange, J. S., Laurenza, M., Lautenbach, K., Leboucher, R., Le Diberder, F. R., Leitl, P., Li, C., Li, L. K., Libby, J., Lieret, K., Liptak, Z., Liu, Q. Y., Liventsev, D., Longo, S., Lozar, A., Lueck, T., Luo, T., Lyu, C., Maggiora, M., Maiti, R., Maity, S., Manfredi, R., Manoni, E., Marcello, S., Marinas, C., Martel, L., Martini, A., Martinov, T., Massaccesi, L., Masuda, M., Matsuoka, K., Matvienko, D., Maurya, S. K., Mckenna, J. A., Meier, F., Merola, M., Metzner, F., Milesi, M., Miller, C., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Molina-Gonzalez, N., Moneta, S., Moser, H. -G., Mrvar, M., Mussa, R., Nakamura, I., Nakamura, K. R., Nakao, M., Nakayama, H., Nakazawa, Y., Narimani Charan, A., Naruki, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Nazaryan, G., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Paladino, A., Panta, A., Paoloni, E., Pardi, S., Parham, K., Park, H., Park, S. -H., Paschen, B., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Peruzzi, I., Peschke, R., Pestotnik, R., Piccolo, M., Piilonen, L. E., Pinna Angioni, G., Podesta-Lerma, P. L. M., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M. T., Purwar, H., Rad, N., Rados, P., Raeuber, G., Raiz, S., Ramirez Morales, A., Reif, M., Reiter, S., Remnev, M., Ripp-Baudot, I., Rizzo, G., Robertson, S. H., Rodríguez Pérez, D., Roney, J. M., Rostomyan, A., Rout, N., Russo, G., Sanders, D. A., Sandilya, S., Sangal, A., Santelj, L., Sato, Y., Savinov, V., Scavino, B., Schueler, J., Schwanda, C., Seino, Y., Selce, A., Senyo, K., Serrano, J., Sevior, M. E., Sfienti, C., Shen, C. P., Shillington, T., Shiu, J. -G., Sibidanov, A., Simon, F., Singh, J. B., Skorupa, J., Sobie, R. J., Soffer, A., Sokolov, A., Solovieva, E., Spataro, S., Spruck, B., Starič, M., Stefkova, S., Stottler, Z. S., Stroili, R., Strube, J., Sue, Y., Sumihama, M., Sumisawa, K., Sutcliffe, W., Suzuki, S. Y., Svidras, H., Takizawa, M., Tamponi, U., Tanida, K., Tanigawa, H., Taniguchi, N., Tenchini, F., Thaller, A., Tiwary, R., Tonelli, D., Torassa, E., Toutounji, N., Trabelsi, K., Uchida, M., Ueda, I., Uematsu, Y., Uglov, T., Unger, K., Unno, Y., Uno, K., Uno, S., Ushiroda, Y., Vahsen, S. E., van Tonder, R., Varvell, K. E., Vinokurova, A., Vitale, L., Vobbilisetti, V., Wakeling, H. M., Wang, E., Wang, M. -Z., Wang, X. L., Warburton, A., Watanabe, M., Watanuki, S., Welsch, M., Wessel, C., Xu, X. P., Yabsley, B. D., Yamada, S., Yan, W., Yang, S. B., Ye, H., Yin, J. H., Yook, Y. M., Yoshihara, K., Yuan, C. Z., Yusa, Y., Zani, L., Zhang, Y., Zhilich, V., Zhou, Q. D., Zhou, X. Y., Zhukova, V. I., and Žlebčík, R.

Abstract

The Lμ−Lτ extension of the standard model predicts the existence of a lepton-flavor-universality-violating Z′ boson that couples only to the heavier lepton families. We search for such a Z′ through its invisible decay in the process e+e−→μ+μ−Z′. We use a sample of electron-positron collisions at a center-of-mass energy of 10.58 GeV collected by the Belle II experiment in 2019–2020, corresponding to an integrated luminosity of 79.7 fb−1. We find no excess over the expected standard-model background. We set 90%-confidence-level upper limits on the cross section for this process as well as on the coupling of the model, which ranges from 3×10−3 at low Z′ masses to 1 at Z′ masses of 8 GeV/c2.

Published
2023

49. Erratum to: Combined analysis of Belle and Belle II data to determine the CKM angle ϕ 3 using B+ → D( <math> <msubsup> <mi>K</mi> <mi>S</mi> <mn>0</mn> </msubsup> </math> $$ {\textrm{K}}_{\textrm{S}}^0 $$ h+h − )h+ decays

Author

Abudinén, F., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Said, S., Aloisio, A., Anh Ky, N., Asner, D., Atmacan, H., Aushev, V., Ayad, R., Babu, V., Bacher, S., Baehr, S., Bahinipati, S., Bambade, P., Banerjee, Sw., Bansal, S., Baudot, J., Becker, J., Behera, P., Belous, K., Bennett, J., Bernlochner, F., Bertemes, M., Bertholet, E., Bessner, M., Bettarini, S., Bianchi, F., Bilka, T., Biswas, D., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Briere, R., Browder, T., Budano, A., Bussino, S., Campajola, M., Cao, L., Casarosa, G., Cecchi, C., Červenkov, D., Cheema, P., Chekelian, V., Chen, A., Cheon, B., Chilikin, K., Chirapatpimol, K., Cho, H.E., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Corona, L., Cunliffe, S., Czank, T., Das, S., Dattola, F., Cruz-Burelo, E., Marino, G., Maurya, S., Nardo, G., Nuccio, M., Pietro, G., Sangro, R., Destefanis, M., Dey, S., Yta-Hernandez, A., Dhamija, R., Canto, A., Doležal, Z., Domínguez Jiménez, I., Dong, T., Dorigo, M., Dossett, D., Dubey, S., Dujany, G., Eliachevitch, M., Epifanov, D., Feichtinger, P., Ferlewicz, D., Fillinger, T., Fiore, S., Fodor, A., Forti, F., Fulsom, B., Gabrielli, A., Ganiev, E., Garcia-Hernandez, M., Gaur, V., Gaz, A., Giordano, R., Giri, A., Glazov, A., Godang, R., Goldenzweig, P., Golob, B., Gradl, W., Graziani, E., Greenwald, D., Gu, T., Guan, Y., Gudkova, K., Guilliams, J., Hadjivasiliou, C., Halder, S., Hara, T., Hartbrich, O., Hayasaka, K., Hayashii, H., Hazra, S., Heredia de la Cruz, I., Hershenhorn, A., Higuchi, T., Hill, E., Hou, W.S., Hsu, C.L., Iijima, T., Inami, K., Ishikawa, A., Iwasaki, M., Jacobs, W., Jang, E.J., Jin, Y., Junkerkalefeld, H., Kaliyar, A., Kang, K., Karl, R., Karyan, G., Kato, Y., Ketter, C., Kiesling, C., Kim, C.H., Kim, D., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Koga, T., Kohani, S., Korpar, S., Kovalenko, E., Kraetzschmar, T., Križan, P., Krokovny, P., Kuhr, T., Kumar, J., Kumar, M., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.J., Lacaprara, S., Lai, Y.T., Licata, C., Lanceri, L., Lange, J., Leboucher, R., Lee, S., Leitl, P., Li, J., Li, S., Gioi, L., Libby, J., Lieret, K., Liptak, Z., Liu, Q., Liventsev, D., Longo, S., Lueck, T., Lyu, C., Maggiora, M., Maiti, R., Maity, S., Manfredi, R., Manoni, E., Marcello, S., Martini, A., Massaccesi, L., Masuda, M., Matsuoka, K., Matvienko, D., McKenna, J., Meier, F., Merola, M., Metzner, F., Milesi, M., Miller, C., Miyabayashi, K., Mizuk, R., Mohanty, G., Molina-Gonzalez, N., Moser, H.G., Mueller, F., Murphy, C., Mussa, R., Nakamura, K., Nakano, T., Nakao, M., Naruki, M., Narwal, D., Natochii, A., Nayak, L., Nayak, M., Nazaryan, G., Nisar, N., Nishida, S., Nishimura, K., Onishchuk, Y., Ono, H., Oskin, P., Pakhlova, G., Paladino, A., Panta, A., Paoloni, E., Parham, K., Park, S.H., Passeri, A., Pathak, A., Patra, S., Pestotnik, R., Piilonen, L., Podobnik, T., Pokharel, S., Polat, L., Praz, C., Prell, S., Prencipe, E., Prim, M., Purwar, H., Rabusov, A., Rados, P., Raiz, S., Reiter, S., Remnev, M., Ripp-Baudot, I., Rizzo, G., Rizzuto, L., Robertson, S., Röhrken, M., Roney, J., Rostomyan, A., Rout, N., Sahoo, D., Sanders, D., Sandilya, S., Santelj, L., Sato, Y., Savinov, V., Scavino, B., Schnell, G., Schueler, J., Schwartz, A., Seino, Y., Selce, A., Senyo, K., Sevior, M., Shapkin, M., Sharma, C., Shillington, T., Shwartz, B., Sibidanov, A., Simon, F., Singh, J., Soffer, A., Solovieva, E., Spataro, S., Spruck, B., Stefkova, S., Stottler, Z., Stroili, R., Sumisawa, K., Sutcliffe, W., Suzuki, S., Tabata, M., Takizawa, M., Tanida, K., Tenchini, F., Tiwary, R., Tonelli, D., Torassa, E., Trabelsi, K., Uchida, M., Ueda, I., Uglov, T., Uno, K., Uno, S., Ushiroda, Y., Vahsen, S., Tonder, R., Varvell, K., Vinokurova, A., Vitale, L., Wakeling, H., Wang, E., Wang, M.Z., Wang, X., Warburton, A., Watanuki, S., Werbycka, O., Wessel, C., Won, E., Yabsley, B., Yan, W., Ye, H., Yoshihara, K., Yusa, Y., Zani, L., Zhai, Y., Zhang, Y., Zhilich, V., Zhou, Q., Zhou, X., and Zhukova, V.

Published
2022

50. Search for the decay <math><msubsup><mi>B</mi><mi>s</mi><mn>0</mn></msubsup><mo>→</mo><msup><mi>η</mi><mo>′</mo></msup><msubsup><mi>K</mi><mi>S</mi><mn>0</mn></msubsup></math>

Author

Pang, T., Savinov, V., Adachi, I., Aihara, H., Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Behera, P., Belous, K., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, P., Chen, A., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S.J., Choi, S.K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Das, S., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Dossett, D., Dubey, S., Epifanov, D., Ferber, T., Frey, A., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Giri, A., Goldenzweig, P., Graziani, E., Gu, T., Gudkova, K., Hadjivasiliou, C., Halder, S., Hayasaka, K., Hayashii, H., Hedges, M. T., Hsu, C.L., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jang, E.J., Jia, S., Jin, Y., Joo, K. K., Kahn, J., Kalita, D., Kaliyar, A. B., Kang, K. H., Karyan, G., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K.H., Kim, Y.K., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kumar, R., Kumara, K., Kuzmin, A., Kwon, Y.J., Lai, Y.T., Lam, T., Lange, J. S., Lee, S. C., Li, C. H., Li, J., Li, L. K., Li, Y., Li Gioi, L., Libby, J., Lieret, K., Liventsev, D., Martini, A., Masuda, M., Matsuda, T., Matvienko, D., Meier, F., Merola, M., Metzner, F., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Mussa, R., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Niiyama, M., Nisar, N. K., Nishida, S., Ogawa, K., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S.H., Passeri, A., Patra, S., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Popov, V., Prencipe, E., Prim, M. T., Rostomyan, A., Rout, N., Russo, G., Sahoo, D., Sandilya, S., Sangal, A., Santelj, L., Sanuki, T., Schnell, G., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J.G., Simon, F., Singh, J. B., Sokolov, A., Solovieva, E., Stanič, S., Starič, M., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Taniguchi, N., Tenchini, F., Trabelsi, K., Uchida, M., Uno, K., Uno, S., Urquijo, P., Van Tonder, R., Varner, G., Vinokurova, A., Waheed, E., Wang, E., Wang, M.Z., Wang, X. L., Watanabe, M., Watanuki, S., Won, E., Xu, X., Yabsley, B. D., Yan, W., Ye, H., Yelton, J., Yin, J. H., Yuan, C. Z., Zhai, Y., Zhang, Z. P., Zhilich, V., and Zhukova, V.

Abstract

We report the results of the first search for the decay Bs0→η′KS0 using 121.4 fb−1 of data collected at the ϒ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We observe no signal and set a 90% confidence-level upper limit of 8.16×10−6 on the Bs0→η′KS0 branching fraction.

Published
2022

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