Measurement of the lepton forward-backward asymmetry in B →xs+-decays with a sum of exclusive modes

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Title:	Measurement of the lepton forward-backward asymmetry in B →xs+-decays with a sum of exclusive modes
Authors:	陳鎰鋒;Sato, Y.;Yamamoto, H.;Adachi, I.;Adamczyk, K.;Aihara, H.;Aushev, T.;Ayad, R.;Bakich, A. M.;Bala, A.;Bhardwaj, V.;Bhuyan, B.;Bonvicini, G.;Bozek, A.;Červenkov, D.;Chekelian, V.;Chen, A.;Chobanova, V.;Cinabro, D.;Eidelman, S.;Farhat, H.;Fast, J. E.;Ferber, T.;Goh, Y. M.;Hara, T.;Hayasaka, K.;He, X. H.;Hoshi, Y.;Hyun, H. J.;Itoh, R.;Iwasaki, Y.;Iwashita, T.;Julius, T.;Kato, Y.;Kawai, H.;Kichimi, H.;Kim, D. Y.;Kim, Y. J.;Kinoshita, K.;Klucar, J.;Kodyš, P.;Korpar, S.;Križan, P.;Krokovny, P.;Kumita, T.;Kuzmin, A.;Kwon, Y.-J.;Lee, S.-H.;Li, Y.;Liu, C.;Liu, Y.;Liu, Z. Q.;Liventsev, D.;Lukin, P.;Moll, A.;Mussa, R.;Nakao, M.;Natkaniec, Z.;Nisar, N. K.;Nitoh, O.;Pakhlov, P.;Park, H. K.;Peng, T.;Pestotnik, R.;Petrič, M.;Ribežl, E.;Röhrken, M.;Santelj, L.;Sanuki, T.;Savinov, V.;Schwanda, C.;Schwartz, A. J.;Semmler, D.;Senyo, K.;Shen, C. P.;Shibata, T.-A.;Shiu, J.-G.;Shwartz, B.;Sibidanov, A.;Sohn, Y.-S.;Sokolov, A.;Solovieva, E.;Starič, M.;Tamponi, U.;Teramoto, Y.;Trabelsi, K.;Uehara, S.;Unno, Y.;Uno, S.;Urquijo, P.;Ushiroda, Y.;Usov, Y.;Hulse, C. Van;Varvell, K. E.;Vorobyev, V.;Wang, C. H.;Wang, M.-Z.;Wang, X. L.;Won, E.;Yamaoka, J.;Yook, Y.
Contributors:	理學院物理學系
Keywords:	ddc:530;info:eu-repo/classification/ddc/530;Physics
Date:	2016-02-22
Issue Date:	2026-04-23 12:14:54 (UTC+8)
Publisher:	American Physical Society;American Physical Society (APS)
Abstract:	摘要： We report the first measurement of the lepton forward-backward asymmetry AFB as a function of the squared four-momentum of the dilepton system, q2, for the electroweak penguin process B→Xs+- with a sum of exclusive final states, where 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 BB¯ pairs recorded at the (4S) resonance with the Belle detector at the KEKB e+e- collider. AFB for the inclusive B→Xs+- 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, AFB<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. 出版者： American Physical Society (APS) 出版日期： 2016-02-22 出處： Physical Review D, 2016-02, Vol.93 (3) 識別號： ISSN: 2470-0010 識別號： DOI: 10.1103/physrevd.93.032008
Appears in Collections:	[Department of Physics] journal & Dissertation

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