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Cinabro, D. Dossett, D. Epifanov, D. Ferlewicz, D. Greenwald, D. Kotchetkov, D. Liventsev, D. M. Asner, D. Matvienko, D. Sahoo, D. \\v{C}ervenkov, D. Y. Kim, E.-J. Jang, E. Prencipe, E. Solovieva, E. Waheed, E. Wang, E. Won, F. Bernlochner, F. Di Capua, F. Simon, F. Tenchini, G. B. Mohanty, G. Bonvicini, G. De Nardo, G. Karyan, G. Pakhlova, G. Russo, G. Schnell, G. Varner, H. Aihara, H. Atmacan, H. B. Jeon, H. Hayashii, H. Kichimi, H. Ono, H. Park, H. Ye, I. Nakamura, J. Bennett, J. Biswal, J. Dingfelder, J.-G. Shiu, J. H. Yin, J. Kahn, J. Libby, J. Schueler, J. Wiechczynski, J. Yelton, K. Belous, K. Chilikin, K. Cho, K. E. Varvell, K. H. Kang, K.-H. Kim, K. Inami, K. Kinoshita, K. K. Joo, K. Kumara, K. Lalwani, K. Lieret, K. Miyabayashi, K. Ogawa, K. R. Nakamura, K. Senyo, K. Tanida, K. T. Kim, K. Trabelsi, L. E. Piilonen, L. K. Li, L. Li Gioi, L. Nayak, L. Santelj, M. Bessner, M. Bra\\v{c}ko, M. Campajola, M.-C. Chang, M. E. Sevior, M. Hernandez Villanueva, M. Iwasaki, M. Masuda, M. 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Gaur, V. Popov, V. Savinov, V. Shebalin, V. Vorobyev, V. Zhilich, V. Zhukova, W.-S. Hou, W. Sutcliffe, W. W. Jacobs, W. Yan, X. Xu, Y. B. Li, Y. Choi, Y. Iwasaki, Y. Jin, Y.-J. Kwon, Y.-K. Kim, Y. Onuki, Y. Sakai, Y. Seino, Y. Unno, Y. Ushiroda, Y. Yusa, Z. Dole\\v{z}al, Z. Liptak, Z. Natkaniec, Z. P. Zhang, Z. S. Stottler","submitted_at":"2019-08-05T20:33:36Z","abstract_excerpt":"We present measurements of the branching fractions for the decays $B\\to K \\mu^{+}\\mu^{-}$ and $B\\to K e^{+}e^{-}$, and their ratio ($R_{K}$), using a data sample of 711 $fb^{-1}$ that contains $772 \\times 10^{6}$ $B\\bar{B}$ events. The data were collected at the $\\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The ratio $R_{K}$ is measured in five bins of dilepton invariant-mass-squared ($q^{2}$): $q^{2} \\in (0.1, 4.0), (4.0, 8.12), (1.0, 6.0)$, $(10.2, 12.8)$ and ($>14.18) GeV^{2}/c^{4}$, along with the whole $q^2$ region. 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B. Kaliyar, A. Bozek, A. Chen, A. Garmash, A. Giri, A. Ishikawa, A. J. Schwartz, A. Kuzmin, A. Natochii, A. Rabusov, A. Rostomyan, A. Sokolov, A. Vinokurova, B. D. Yabsley, B. G. Cheon, B. G. Fulsom, B. Golob, B. H. Kim, B. Shwartz, C. Bele\\~no, C. Hadjivasiliou, C. H. Li, C. H. Wang, C. Kiesling, C.-L. Hsu, C. Schwanda, C. W. Joo, C. Z. Yuan, D. Cinabro, D. Dossett, D. Epifanov, D. Ferlewicz, D. Greenwald, D. Kotchetkov, D. Liventsev, D. M. Asner, D. Matvienko, D. Sahoo, D. \\v{C}ervenkov, D. Y. Kim, E.-J. Jang, E. Prencipe, E. Solovieva, E. Waheed, E. Wang, E. Won, F. Bernlochner, F. Di Capua, F. Simon, F. Tenchini, G. B. Mohanty, G. Bonvicini, G. De Nardo, G. Karyan, G. Pakhlova, G. Russo, G. Schnell, G. Varner, H. Aihara, H. Atmacan, H. B. Jeon, H. Hayashii, H. Kichimi, H. Ono, H. Park, H. Ye, I. Nakamura, J. Bennett, J. Biswal, J. Dingfelder, J.-G. Shiu, J. H. Yin, J. Kahn, J. Libby, J. Schueler, J. Wiechczynski, J. Yelton, K. Belous, K. Chilikin, K. Cho, K. E. Varvell, K. H. 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Pardi, S. Patra, S. Paul, S. Sandilya, S. Stani\\v{c}, S. Uehara, S. Uno, S. Watanuki, S. Wehle, T. Aushev, T. Bilka, T. E. Browder, T. Ferber, T. Higuchi, T. Iijima, T. J. Moon, T. K. Pedlar, T. Kuhr, T. Luo, T. Matsuda, T. Mori, T. Podobnik, T. Sanuki, T. Sumiyoshi, T. Uglov, T. V. Dong, U. Tamponi, V. Aulchenko, V. Babu, V. Bhardwaj, V. Chekelian, V. Gaur, V. Popov, V. Savinov, V. Shebalin, V. Vorobyev, V. Zhilich, V. Zhukova, W.-S. Hou, W. Sutcliffe, W. W. Jacobs, W. Yan, X. Xu, Y. B. Li, Y. Choi, Y. Iwasaki, Y. Jin, Y.-J. Kwon, Y.-K. Kim, Y. Onuki, Y. Sakai, Y. Seino, Y. Unno, Y. Ushiroda, Y. Yusa, Z. Dole\\v{z}al, Z. Liptak, Z. Natkaniec, Z. P. Zhang, Z. S. Stottler","submitted_at":"2019-08-05T20:33:36Z","abstract_excerpt":"We present measurements of the branching fractions for the decays $B\\to K \\mu^{+}\\mu^{-}$ and $B\\to K e^{+}e^{-}$, and their ratio ($R_{K}$), using a data sample of 711 $fb^{-1}$ that contains $772 \\times 10^{6}$ $B\\bar{B}$ events. 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