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  • Measurement of the lepton f...
    Sato, Y.; Abdesselam, A.; Adachi, I.; Aihara, H.; Aulchenko, V.; Ayad, R.; Bakich, A. M.; Bala, A.; Bhuyan, B.; Bondar, A.; Bonvicini, G.; Chen, A.; Cho, I. -S.; Chobanova, V.; Choi, Y.; Cinabro, D.; Dalseno, J.; Danilov, M.; Doležal, Z.; Drutskoy, A.; Dutta, D.; Dutta, K.; Eidelman, S.; Farhat, H.; Garmash, A.; Golob, B.; Hayashii, H.; He, X. H.; Hoshi, Y.; Hou, W. -S.; Hyun, H. J.; Iwashita, T.; Jaegle, I.; Julius, T.; Kang, J. H.; Kato, E.; Kato, Y.; Kawai, H.; Kichimi, H.; Kim, H. J.; Kim, J. B.; Kim, M. J.; Kim, Y. J.; Klucar, J.; Ko, B. R.; Kumita, T.; Libby, J.; Liu, Y.; Liu, Z. Q.; Lukin, P.; Miyata, H.; Moll, A.; Mussa, R.; Nakao, M.; Natkaniec, Z.; Nedelkovska, E.; Nishida, S.; Pakhlov, P.; Park, H. K.; Pedlar, T. K.; Peng, T.; Petrič, M.; Piilonen, L. E.; Ritter, M.; Röhrken, M.; Sahoo, H.; Saito, T.; Santelj, L.; Sanuki, T.; Schwanda, C.; Schwartz, A. J.; Sevior, M. E.; Shapkin, M.; Shiu, J. -G.; Sibidanov, A.; Simon, F.; Sohn, Y. -S.; Starič, M.; Sumiyoshi, T.; Tamponi, U.; Tatishvili, G.; Teramoto, Y.; Uglov, T.; Uno, S.; Urquijo, P.; Ushiroda, Y.; Usov, Y.; Van Hulse, C.; Varner, G.; Varvell, K. E.; Vorobyev, V.; Wang, C. H.; Wang, X. L.; Watanabe, Y.; Yamaoka, J.; Yamashita, Y.; Yook, Y.; Zhilich, V.; Zhulanov, V.; Zupanc, A.

    Physical review. D, 02/2016, Letnik: 93, Številka: 3
    Journal Article

    We report the first measurement of the lepton forward-backward asymmetry $\mathscr{A}$FB as a function of the squared four-momentum of the dilepton system, q2, for the electroweak penguin process B→Xsℓ+ℓ- with a sum of exclusive final states, where ℓ is an electron or a muon and Xs is a hadronic recoil system with an s quark. The results are based on a data sample containing 772×106 $B$$\bar{B}$ pairs recorded at the Υ(4S) resonance with the Belle detector at the KEKB e+e- collider. $\mathscr{A}4FB for the inclusive B→Xsℓ+ℓ- is extrapolated from the sum of 10 exclusive Xs states whose invariant mass is less than 2 GeV/c2. For q2>10.2 GeV2/c2, $\mathscr{A}$FB<0 is excluded at the 2.3σ level, where σ is the standard deviation. For q2<4.3 GeV2/c2, the result is within 1.8σ of the Standard Model theoretical expectation.