About: Measurements of branching fractions and direct CP asymmetries for B -> K pi, B -> pi pi and B -> KK decays     Goto   Sponge   NotDistinct   Permalink

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Description
  • We report measurements of the branching fractions and direct CP asymmetries (A(CP)) for B -> K pi, pi pi and KK decays (but not pi(0) pi(0)) based on the final data sample of 772 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We set a 90% confidence-level upper limit for K+K- at 2.0 x 10(-7); all other decays are observed with branching fractions ranging from 10(-6) to 10(-5). In the B-0/(B) over bar (0) -> K-+/-pi(-/+) mode, we confirm Belle's previously reported large A(CP) with a value of -0.069 +/- 0.014 +/- 0.007 and a significance of 4.4 sigma. For all other flavor-specific modes, we find A(CP) values consistent with zero, including A(CP)(K+pi(0)) = +0.043 +/- 0.024 +/- 0.007 with 1.8 sigma significance. The difference of CP asymmetry between B-+/- -> K-+/- pi(0) and B-0/(B) over bar (0) K-+/-pi(-/+) is found to be Delta A(K pi) equivalent to A(CP)(K+pi(0)) - A(CP)(K+pi(-)) = +0.112 +/- 0.027 +/- 0.007 with 4.0 sigma significance. We also calculate the ratios of partial widths for the B -> K pi decays. Using our results, we test the validity of the sum rule A(CP)(K+pi(-)) + A(CP)(K-0 pi(+)) Gamma(K-0 pi(+))/Gamma(K+pi(-)) - A(CP)(K+pi(0))2 Gamma(K+pi(0))/Gamma(K+pi(-)) - A(CP)(K-0 pi(0))2 Gamma(K-0 pi(0))/Gamma(K+pi(-)) =0 and obtain a sum of -0.270 +/- 0.132 +/- 0.060 with 1:9 sigma significance. DOI: 10.1103/PhysRevD.87.031103
  • We report measurements of the branching fractions and direct CP asymmetries (A(CP)) for B -> K pi, pi pi and KK decays (but not pi(0) pi(0)) based on the final data sample of 772 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We set a 90% confidence-level upper limit for K+K- at 2.0 x 10(-7); all other decays are observed with branching fractions ranging from 10(-6) to 10(-5). In the B-0/(B) over bar (0) -> K-+/-pi(-/+) mode, we confirm Belle's previously reported large A(CP) with a value of -0.069 +/- 0.014 +/- 0.007 and a significance of 4.4 sigma. For all other flavor-specific modes, we find A(CP) values consistent with zero, including A(CP)(K+pi(0)) = +0.043 +/- 0.024 +/- 0.007 with 1.8 sigma significance. The difference of CP asymmetry between B-+/- -> K-+/- pi(0) and B-0/(B) over bar (0) K-+/-pi(-/+) is found to be Delta A(K pi) equivalent to A(CP)(K+pi(0)) - A(CP)(K+pi(-)) = +0.112 +/- 0.027 +/- 0.007 with 4.0 sigma significance. We also calculate the ratios of partial widths for the B -> K pi decays. Using our results, we test the validity of the sum rule A(CP)(K+pi(-)) + A(CP)(K-0 pi(+)) Gamma(K-0 pi(+))/Gamma(K+pi(-)) - A(CP)(K+pi(0))2 Gamma(K+pi(0))/Gamma(K+pi(-)) - A(CP)(K-0 pi(0))2 Gamma(K-0 pi(0))/Gamma(K+pi(-)) =0 and obtain a sum of -0.270 +/- 0.132 +/- 0.060 with 1:9 sigma significance. DOI: 10.1103/PhysRevD.87.031103 (en)
Title
  • Measurements of branching fractions and direct CP asymmetries for B -> K pi, B -> pi pi and B -> KK decays
  • Measurements of branching fractions and direct CP asymmetries for B -> K pi, B -> pi pi and B -> KK decays (en)
skos:prefLabel
  • Measurements of branching fractions and direct CP asymmetries for B -> K pi, B -> pi pi and B -> KK decays
  • Measurements of branching fractions and direct CP asymmetries for B -> K pi, B -> pi pi and B -> KK decays (en)
skos:notation
  • RIV/00216208:11320/13:10193200!RIV14-MSM-11320___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I, Z(MSM0021620859)
http://linked.open...iv/cisloPeriodika
  • 1
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 86869
http://linked.open...ai/riv/idVysledku
  • RIV/00216208:11320/13:10193200
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • photos; violation; supersymmetry; puzzle; monte-carlo (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [CC3719ACB961]
http://linked.open...i/riv/nazevZdroje
  • Physical Review D - Particles, Fields, Gravitation and Cosmology
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 1
http://linked.open...iv/tvurceVysledku
  • Cho, K.
  • Doležal, Zdeněk
  • Kodyš, Peter
  • Unno, Y.
  • Adachi, I.
  • Aihara, H.
  • Chen, P.
  • Bischofberger, M.
  • Aushev, T.
  • Bondar, A.
  • Asner, D. M.
  • Aulchenko, V.
  • Aziz, T.
  • Bakich, A. M.
  • Bhuyan, B.
  • Bonvicini, G.
  • Boček, A.
  • Bracko, M.
  • Browder, T. E.
  • Chang, P.
  • Chao, Y.
  • Chekelian, V.
  • Chen, A.
  • Cheon, B. G.
  • Chistov, R.
  • Cho, I. -S.
  • Choi, Y.
  • Chobanova, V.
  • Mohanty, G. B.
  • Duh, Y. -T.
  • Wu, T. -Y.
http://linked.open...ain/vavai/riv/wos
  • 000315279400001
http://linked.open...n/vavai/riv/zamer
issn
  • 1550-7998
number of pages
http://bibframe.org/vocab/doi
  • 10.1103/PhysRevD.87.031103
http://localhost/t...ganizacniJednotka
  • 11320
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