We perform an angular analysis of the B→K∗e+e- decay for the dielectron mass squared, q2, range of 0.0008-1.1200 GeV2/c4 using the full Belle dataset in the K∗0→K+π- and K∗+→KS0π+ channels, incorporating new methods of electron identification to improve the statistical power of the dataset. This analysis is sensitive to contributions from right-handed currents from physics beyond the Standard Model by constraining the Wilson coefficients C7(′). We perform a fit to the B→K∗e+e- differential decay rate and measure the imaginary component of the transversality amplitude to be ATIm=-1.27±0.52±0.12, and the K∗ transverse asymmetry to be AT(2)=0.52±0.53±0.11, with FL and ATRe fixed to the Standard Model values. The resulting constraints on the value of C7′ are consistent with the Standard Model within a 2σ confidence interval.

Angular analysis of B →k∗e+e- in the low- q2 region with new electron identification at Belle / Ferlewicz, D.; Urquijo, P.; Adachi, I.; Adamczyk, K.; Aihara, H.; Asner, D. M.; Atmacan, H.; Ayad, R.; Babu, V.; Banerjee, S.; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bhardwaj, V.; Bhuyan, B.; Bilka, T.; Biswas, D.; Bodrov, D.; Bracko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; Cao, L.; Cervenkov, D.; Chang, M. -C.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Das, S.; Dash, N.; De Marino, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Dingfelder, J.; Dolezal, Z.; Dong, T. V.; Dubey, S.; Ecker, P.; Epifanov, D.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Garmash, A.; Giri, A.; Goldenzweig, P.; Graziani, E.; Gu, T.; Guan, Y.; Gudkova, K.; Hadjivasiliou, C.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazra, S.; Hedges, M. T.; Herrmann, D.; Hou, W. -S.; Hsu, C. -L.; Iijima, T.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Jia, S.; Jin, Y.; Kaliyar, A. B.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kinoshita, K.; Kodys, P.; Konno, T.; Korobov, A.; Korpar, S.; Kou, E.; Kovalenko, E.; Krizan, P.; Krokovny, P.; Kuhr, T.; Kumar, R.; Kumara, K.; Kuzmin, A.; Kwon, Y. -J.; Lai, Y. -T.; Lam, T.; Lee, S. C.; Levit, D.; Lewis, P.; Li, L. K.; Li, Y. B.; Li Gioi, L.; Libby, J.; Liventsev, D.; Ma, Y.; Matvienko, D.; Meier, F.; Merola, M.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Nakamura, I.; Nakao, M.; Natochii, A.; Nayak, L.; Nishida, S.; Ogawa, S.; Ono, H.; Pardi, S.; Park, J.; Passeri, A.; Patra, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Prim, M. T.; Rout, N.; Russo, Guido; Sandilya, S.; Savinov, V.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shan, W.; Sharma, C.; Shiu, J. -G.; Shwartz, B.; Solovieva, E.; Staric, M.; Sumihama, M.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Uchida, M.; Unno, Y.; Uno, S.; Ushiroda, Y.; Vahsen, S. E.; Varvell, K. E.; Wang, E.; Wang, M. -Z.; Watanuki, S.; Won, E.; 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.; Zhukova, V.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 110:7(2024). [10.1103/PhysRevD.110.072005]

Angular analysis of B →k∗e+e- in the low- q2 region with new electron identification at Belle

Campajola M.;Di Capua F.;Merola M.;Pardi S.;Russo Guido;
2024

Abstract

We perform an angular analysis of the B→K∗e+e- decay for the dielectron mass squared, q2, range of 0.0008-1.1200 GeV2/c4 using the full Belle dataset in the K∗0→K+π- and K∗+→KS0π+ channels, incorporating new methods of electron identification to improve the statistical power of the dataset. This analysis is sensitive to contributions from right-handed currents from physics beyond the Standard Model by constraining the Wilson coefficients C7(′). We perform a fit to the B→K∗e+e- differential decay rate and measure the imaginary component of the transversality amplitude to be ATIm=-1.27±0.52±0.12, and the K∗ transverse asymmetry to be AT(2)=0.52±0.53±0.11, with FL and ATRe fixed to the Standard Model values. The resulting constraints on the value of C7′ are consistent with the Standard Model within a 2σ confidence interval.
2024
Angular analysis of B →k∗e+e- in the low- q2 region with new electron identification at Belle / Ferlewicz, D.; Urquijo, P.; Adachi, I.; Adamczyk, K.; Aihara, H.; Asner, D. M.; Atmacan, H.; Ayad, R.; Babu, V.; Banerjee, S.; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bhardwaj, V.; Bhuyan, B.; Bilka, T.; Biswas, D.; Bodrov, D.; Bracko, M.; Branchini, P.; Browder, T. E.; Budano, A.; Campajola, M.; Cao, L.; Cervenkov, D.; Chang, M. -C.; Cheon, B. G.; Chilikin, K.; Cho, H. E.; Cho, K.; Choi, S. -K.; Choi, Y.; Choudhury, S.; Das, S.; Dash, N.; De Marino, G.; De Pietro, G.; Dhamija, R.; Di Capua, F.; Dingfelder, J.; Dolezal, Z.; Dong, T. V.; Dubey, S.; Ecker, P.; Epifanov, D.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Garmash, A.; Giri, A.; Goldenzweig, P.; Graziani, E.; Gu, T.; Guan, Y.; Gudkova, K.; Hadjivasiliou, C.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazra, S.; Hedges, M. T.; Herrmann, D.; Hou, W. -S.; Hsu, C. -L.; Iijima, T.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W. W.; Jia, S.; Jin, Y.; Kaliyar, A. B.; Kiesling, C.; Kim, C. H.; Kim, D. Y.; Kim, K. -H.; Kim, Y. -K.; Kinoshita, K.; Kodys, P.; Konno, T.; Korobov, A.; Korpar, S.; Kou, E.; Kovalenko, E.; Krizan, P.; Krokovny, P.; Kuhr, T.; Kumar, R.; Kumara, K.; Kuzmin, A.; Kwon, Y. -J.; Lai, Y. -T.; Lam, T.; Lee, S. C.; Levit, D.; Lewis, P.; Li, L. K.; Li, Y. B.; Li Gioi, L.; Libby, J.; Liventsev, D.; Ma, Y.; Matvienko, D.; Meier, F.; Merola, M.; Metzner, F.; Miyabayashi, K.; Mizuk, R.; Mohanty, G. B.; Nakamura, I.; Nakao, M.; Natochii, A.; Nayak, L.; Nishida, S.; Ogawa, S.; Ono, H.; Pardi, S.; Park, J.; Passeri, A.; Patra, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Prencipe, E.; Prim, M. T.; Rout, N.; Russo, Guido; Sandilya, S.; Savinov, V.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shan, W.; Sharma, C.; Shiu, J. -G.; Shwartz, B.; Solovieva, E.; Staric, M.; Sumihama, M.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Uchida, M.; Unno, Y.; Uno, S.; Ushiroda, Y.; Vahsen, S. E.; Varvell, K. E.; Wang, E.; Wang, M. -Z.; Watanuki, S.; Won, E.; 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.; Zhukova, V.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 110:7(2024). [10.1103/PhysRevD.110.072005]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/985726
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