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We present a precise measurement of the standard model CP-violation parameter sin(2phi1) based on a sample of 152 x 10^6 BB-bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e-…

高能物理 - 实验 · 物理学 2007-08-06 The Belle Collaboration , K. Abe

We report a measurement of the CP violation parameters in b->c anti-c d decays. Mixing-induced CP violation involving this transition is studied using a sample of B0->J/psi pi0, D*+D*- and D*+-D-+ decays with a data set accumulated at the…

高能物理 - 实验 · 物理学 2017-08-23 T. Aushev

We report an improved measurement of the partial-rate CP asymmetry in B+ => K0pi+ and B- => K0bar pi- decays. The analysis is based on a data sample of 85 million BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at…

高能物理 - 实验 · 物理学 2008-11-26 Y. Unno , K. Suzuki

CP violation in $B\to J/\psi K^*$ decays is studied using an angular analysis in a data sample of 253 fb$^{-1}$ recorded with the Belle detector at the KEKB $e^+e^-$ collider. The flavor separated measurements of the decay amplitudes…

高能物理 - 实验 · 物理学 2019-08-14 R. Itoh , Y. Onuki

In this proceeding, we report the recent measurements of time-dependent CP violation in B meson decays from the Belle Collaboration. The Belle experiment stopped operation in June 2010 and collected nearly 772 x 10^6 B B-bar pairs at the…

高能物理 - 实验 · 物理学 2019-08-13 H. Sahoo

We measure the CP-violating asymmetries in decays to the D0 -> K+K- and D0 -> pi+pi- CP eigenstates using 540 fb^{-1} of data collected with the Belle detector at or near the Upsilon(4S) resonance. Cabibbo-favored D0 -> K-pi+ decays are…

高能物理 - 实验 · 物理学 2019-08-13 M. Staric

We present measurements of the time-dependent CP-violating asymmetries in B0 --> K0S K0S K0S decays based on 384 million Y(4S) decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We obtain the CP…

高能物理 - 实验 · 物理学 2010-04-12 The BABAR Collaboration , B. Aubert et al

We report a measurement of time-dependent $CP$ violation in $B^0 \to K^0_S \pi^0 \pi^0$ decays using a data sample of $772 \times 10^6$ $B\bar{B}$ pairs collected by the Belle experiment runnin g at the $\Upsilon (4S)$ resonance at the KEKB…

高能物理 - 实验 · 物理学 2019-01-28 Belle Collaboration , Y. Yusa , H. Aihara , S. Al Said , D. M. Asner , H. Atmacan , V. Aulchenko , T. Aushev , R. Ayad , V. Babu , I. Badhrees , S. Bahinipati , A. M. Bakich , V. Bansal , P. Behera , V. Bhardwaj , B. Bhuyan , J. Biswal , A. Bozek , M. Bračko , T. E. Browder , L. Cao , D. Červenkov , V. Chekelian , A. Chen , B. G. Cheon , K. Chilikin , S. -K. Choi , Y. Choi , D. Cinabro , S. Cunliffe , N. Dash , S. Di Carlo , T. V. Dong , Z. Drásal , S. Eidelman , D. Epifanov , J. E. Fast , B. G. Fulsom , R. Garg , V. Gaur , A. Giri , P. Goldenzweig , B. Golob , Y. Guan , J. Haba , K. Hayasaka , H. Hayashii , S. Hirose , K. Inami , G. Inguglia , A. Ishikawa , M. Iwasaki , Y. Iwasaki , W. W. Jacobs , S. Jia , Y. Jin , K. K. Joo , K. H. Kang , T. Kawasaki , D. Y. Kim , J. B. Kim , K. T. Kim , S. H. Kim , K. Kinoshita , P. Kodyš , S. Korpar , D. Kotchetkov , P. Križan , R. Kroeger , T. Kuhr , R. Kumar , Y. -J. Kwon , J. S. Lange , I. S. Lee , S. C. Lee , L. K. Li , Y. B. Li , L. Li Gioi , J. Libby , D. Liventsev , M. Lubej , T. Luo , M. Masuda , T. Matsuda , M. Merola , K. Miyabayashi , H. Miyata , R. Mizuk , G. B. Mohanty , H. K. Moon , E. Nakano , T. Nanut , K. J. Nath , Z. Natkaniec , N. K. Nisar , S. Nishida , K. Nishimura , K. Ogawa , S. Ogawa , H. Ono , G. Pakhlova , B. Pal , S. Pardi , H. Park , S. Paul , T. K. Pedlar , R. Pestotnik , L. E. Piilonen , V. Popov , E. Prencipe , A. Rostomyan , G. Russo , Y. Sakai , S. Sandilya , T. Sanuki , V. Savinov , O. Schneider , G. Schnell , C. Schwanda , A. J. Schwartz , Y. Seino , K. Senyo , O. Seon , M. E. Sevior , C. P. Shen , T. -A. Shibata , J. -G. Shiu , M. Starič , M. Sumihama , T. Sumiyoshi , M. Takizawa , U. Tamponi , K. Tanida , F. Tenchini , M. Uchida , T. Uglov , Y. Unno , S. Uno , Y. Ushiroda , Y. Usov , C. Van Hulse , R. Van Tonder , G. Varner , K. E. Varvell , V. Vorobyev , A. Vossen , E. Waheed , B. Wang , C. H. Wang , M. -Z. Wang , P. Wang , E. Won , H. Ye , J. H. Yin , Z. P. Zhang , V. Zhilich , V. Zhulanov

We present updated measurements of the CP-violating parameters S_pipi and C_pipi in B0 -> pi+pi- decays. Using a sample of 227 million Y(4S) -> BBbar decays collected with the BaBar detector at the PEP-II asymmetric-energy e+e- collider at…

高能物理 - 实验 · 物理学 2008-11-26 B. Aubert , BaBar Collaboration

We present preliminary measurements of CP-violating asymmetries for the decay omega K0S. The data sample corresponds to 347 million BBbar pairs produced by e+e- annihilation at the Upsilon(4S) resonance. For the decay omega K0S, we measure…

高能物理 - 实验 · 物理学 2007-05-23 The BABAR Collaboration , B. Aubert

We present a summary of recent studies on $CP$ violation with the Belle experiment using the final data sample of $772 \times 10^{6}$ B\bar{B} pairs produced at the Ypsilon(4S) resonance at the KEK asymmetric e^+ e^- collider. We discuss…

高能物理 - 实验 · 物理学 2015-09-23 P. Vanhoefer

We report observations of CP violation in the decays B0 -> K+pi- and B0 -> pi+pi- in a sample of 383 million Y(4S) -> BBbar events. We find 4372 +/- 82 B0 -> K+pi- decays and measure the direct CP-violating charge asymmetry Akpi = -0.107…

高能物理 - 实验 · 物理学 2019-08-14 B. Aubert

We present a time-dependent Dalitz plot measurement of CP violation parameters in B0 --> Ks Pi+ Pi- decays. These results are obtained from a large data sample that contains 657 million BBbar pairs collected at the Y(4S) resonance with the…

高能物理 - 实验 · 物理学 2019-08-13 J. Dalseno

We present a new measurement of the time-dependent CP-violating parameters in B0 -> pi+pi- decays using a data sample that contains 535M BBbar pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider operating at…

高能物理 - 实验 · 物理学 2008-11-26 The Belle Collaboration , H. Ishino

We present a measurement of the time-dependent CP-violating asymmetries in B0 -> K0S pi0 decays based on 348 million Y(4S) -> BBbar events collected by the BABAR experiment at the PEP-II asymmetric-energy B Factory at SLAC. We measure the…

高能物理 - 实验 · 物理学 2007-05-23 The BABAR Collaboration , B. Aubert

We report a measurement of the decay B0 --> rho0 pi0, using 386 x 10^6 BB-bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We detect 51^{+14}_{-13} signal events with a…

高能物理 - 实验 · 物理学 2012-08-27 The Belle Collaboration

We report the measurement of the branching fraction, the polarization, and the parameters of the time-dependent CP violation in B0 -> D*+ D*- decays using a data sample of 772 million BB pairs, collected at the Y(4S) resonance with the…

高能物理 - 实验 · 物理学 2012-10-24 Belle Collaboration , B. Kronenbitter , I. Adachi , H. Aihara , K. Arinstein , D. M. Asner , T. Aushev , T. Aziz , A. M. Bakich , M. Barrett , K. Belous , V. Bhardwaj , B. Bhuyan , A. Bondar , A. Bozek , M. Bračko , O. Brovchenko , T. E. Browder , V. Chekelian , A. Chen , P. Chen , B. G. Cheon , R. Chistov , I. -S. Cho , K. Cho , Y. Choi , J. Dalseno , Z. Doležal , Z. Drásal , A. Drutskoy , S. Eidelman , S. Esen , J. E. Fast , M. Feindt , V. Gaur , N. Gabyshev , Y. M. Goh , J. Haba , H. Hayashii , Y. Horii , Y. Hoshi , W. -S. Hou , Y. B. Hsiung , T. Iijima , K. Inami , A. Ishikawa , R. Itoh , M. Iwabuchi , Y. Iwasaki , T. Julius , J. H. Kang , P. Kapusta , T. Kawasaki , C. Kiesling , H. J. Kim , H. O. Kim , J. B. Kim , J. H. Kim , K. T. Kim , M. J. Kim , Y. J. Kim , K. Kinoshita , B. R. Ko , S. Koblitz , P. Kodyš , S. Korpar , R. T. Kouzes , P. Križan , P. Krokovny , T. Kuhr , R. Kumar , T. Kumita , Y. -J. Kwon , S. -H. Lee , J. Li , Y. Li , J. Libby , Y. Liu , Z. Q. Liu , D. Liventsev , R. Louvot , S. McOnie , K. Miyabayashi , H. Miyata , R. Mizuk , G. B. Mohanty , D. Mohapatra , A. Moll , E. Nakano , M. Nakao , S. Neubauer , C. Ng , S. Nishida , K. Nishimura , O. Nitoh , T. Ohshima , S. Okuno , S. L. Olsen , Y. Onuki , H. Ozaki , P. Pakhlov , G. Pakhlova , C. W. Park , H. Park , H. K. Park , R. Pestotnik , M. Petrič , L. E. Piilonen , M. Prim , M. Ritter , M. Röhrken , S. Ryu , H. Sahoo , Y. Sakai , S. Sandilya , L. Santelj , T. Sanuki , O. Schneider , C. Schwanda , A. J. Schwartz , K. Senyo , M. E. Sevior , M. Shapkin , C. P. Shen , T. -A. Shibata , J. -G. Shiu , A. Sibidanov , F. Simon , P. Smerkol , Y. -S. Sohn , A. Sokolov , E. Solovieva , S. Stanič , M. Starič , M. Sumihama , K. Sumisawa , T. Sumiyoshi , G. Tatishvili , Y. Teramoto , K. Trabelsi , T. Tsuboyama , M. Uchida , S. Uehara , T. Uglov , Y. Unno , S. Uno , Y. Usov , P. Vanhoefer , G. Varner , K. E. Varvell , V. Vorobyev , C. H. Wang , P. Wang , Y. Watanabe , K. M. Williams , E. Won , B. D. Yabsley , J. Yamaoka , Y. Yamashita , D. Zander , V. Zhilich , V. Zhulanov , A. Zupanc

We report the first observation of CP-violating asymmetries in B0 --> pi+pi- decays based on a 140 fb-1 data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We reconstruct…

高能物理 - 实验 · 物理学 2019-08-14 K. Abe

We present measurements of time-dependent CP asymmetries in B0 --> phi(1020) K0, eta' K0, Ks Ks Ks, Ks pi0, f0(980) Ks, omega Ks and K+ K- Ks decays based on a sample of 386 x 10^6 BBbar pairs collected at the Upsilon(4S) resonance with the…

高能物理 - 实验 · 物理学 2007-05-23 The Belle Collaboration , K. Abe

We present the recent measurements of the B0 -> eta' K0 and the B -> omega K decay modes based on the full data set of 772x10^6 BBbar pairs collected by the Belle detector at the KEKB e+e- collider. In the B0 -> eta' K^{0} mode, we obtain…

高能物理 - 实验 · 物理学 2014-12-16 V. Chobanova