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The process $e^+e^- \to \gamma\chi_{cJ}$ ($J$=1, 2) is studied via initial state radiation using 980 fb$^{-1}$ of data at and around the $\Upsilon(nS)$ ($n$=1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB…

High Energy Physics - Experiment · Physics 2015-07-29 Belle Collaboration , Y. L. Han , X. L. Wang , C. Z. Yuan , C. P. Shen , P. Wang , A. Abdesselam , I. Adachi , H. Aihara , S. Al Said , D. M. Asner , T. Aushev , V. Babu , I. Badhrees , V. Bansal , V. Bhardwaj , J. Biswal , A. Bozek , M. Bračko , A. Chen , B. G. Cheon , R. Chistov , K. Cho , V. Chobanova , S. -K. Choi , D. Cinabro , J. Dalseno , M. Danilov , Z. Doležal , A. Drutskoy , D. Dutta , S. Eidelman , H. Farhat , J. E. Fast , T. Ferber , B. G. Fulsom , V. Gaur , N. Gabyshev , A. Garmash , D. Getzkow , R. Gillard , R. Glattauer , Y. M. Goh , P. Goldenzweig , B. Golob , J. Haba , K. Hayasaka , H. Hayashii , X. H. He , T. Horiguchi , W. -S. Hou , T. Iijima , A. Ishikawa , I. Jaegle , D. Joffe , K. K. Joo , H. Kichimi , D. Y. Kim , J. B. Kim , J. H. Kim , K. T. Kim , S. H. Kim , Y. J. Kim , K. Kinoshita , B. R. Ko , P. Kodyš , P. Križan , P. Krokovny , P. Lewis , L. Li Gioi , J. Libby , D. Liventsev , P. Lukin , M. Masuda , D. Matvienko , K. Miyabayashi , H. Miyata , R. Mizuk , A. Moll , H. K. Moon , R. Mussa , E. Nakano , M. Nakao , M. Nayak , N. K. Nisar , S. Nishida , S. Ogawa , S. Okuno , W. Ostrowicz , P. Pakhlov , G. Pakhlova , B. Pal , H. Park , T. K. Pedlar , R. Pestotnik , M. Petrič , L. E. Piilonen , C. Pulvermacher , E. Ribežl , M. Ritter , A. Rostomyan , H. Sahoo , Y. Sakai , S. Sandilya , L. Santelj , T. Sanuki , O. Schneider , G. Schnell , C. Schwanda , K. Senyo , M. E. Sevior , M. Shapkin , V. Shebalin , T. -A. Shibata , J. -G. Shiu , B. Shwartz , F. Simon , Y. -S. Sohn , A. Sokolov , E. Solovieva , S. Stanič , M. Steder , M. Sumihama , U. Tamponi , Y. Teramoto , M. Uchida , S. Uehara , T. Uglov , Y. Unno , S. Uno , Y. Usov , C. Van Hulse , P. Vanhoefer , G. Varner , A. Vossen , M. N. Wagner , Y. Watanabe , K. M. Williams , S. Yashchenko , Y. Yook , C. C. Zhang , Z. P. Zhang , V. Zhilich , V. Zhulanov , A. Zupanc

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…

High Energy Physics - Experiment · Physics 2015-09-23 P. Vanhoefer

The radiative decay $B \to \phi K \gamma$ is observed for the first time. The branching fraction for the charged $B^- \to \phi K^- \gamma$ decay mode is measured to be ${\cal B}(B^- \to \phi K^- \gamma) = (3.4 \pm 0.9 \pm 0.4) \times…

High Energy Physics - Experiment · Physics 2008-11-26 A. Drutskoy

Belle II experiment at the SuperKEKB collider is a major upgrade of the Belle experiment at the KEKB asymmetric e^+e^- collider at the KEK. The experiment will focus on the search for new physics beyond the standard model via high precision…

Instrumentation and Detectors · Physics 2012-08-21 C. Z. Yuan

Significant progress toward measuring the CKM angle alpha has been made by the B-factories over the past decade. This work has culminated in a constraint on alpha with a precision of less than 4 degrees.

High Energy Physics - Experiment · Physics 2010-04-21 A. J. Bevan

Analyses of $B$ meson decays to charmless hadronic final states are an important part of the Belle II program. They are sensitive to effects from non-standard model physics and provide experimentally precise constraints on the weak…

High Energy Physics - Experiment · Physics 2024-05-27 Shu-Ping Lin

We present herein the most recent BABAR results on direct CP asymmetry measurements in B -> Xs gamma, on partial branching fraction and CP asymmetry measurements in B -> Xs l+l-, on a search for B -> pi/eta l+l- decays, on a search for…

High Energy Physics - Experiment · Physics 2019-08-13 Gerald Eigen

The Belle II experiment operates at the SuperKEKB asymmetric-energy $e^+e^-$ collider. During the Run 1 data taking, we have collected an integrated luminosity of $424\text{ fb}^{-1}$ of collision data at the energy near the $\Upsilon (4S)$…

High Energy Physics - Experiment · Physics 2025-02-18 Shu-Ping Lin

High precision experimental new electroweak results measured at the four LEP experiments and the SLD collaboration are discussed. Heavy quark (b b-bar and c c-bar) forward-backward asymmetries measured at LEP are presented along with…

High Energy Physics - Experiment · Physics 2007-05-23 Erez Etzion

In this paper, we draw constraints on the Cabibbo-Kobayashi-Maskawa (CKM) angle $\alpha$ and the strong phase $\delta$ from the experimental measurements of $\ssb$, the CP-violating asymmetries and branching ratios of $B \to \pi^+ \pi^-,…

High Energy Physics - Phenomenology · Physics 2016-08-16 Zhenjun Xiao , Cai-Dian Lü , Libo Guo

The process e+e- --> p anti-p gamma is studied using 469 fb-1 of integrated luminosity collected with the BABAR detector at the PEP-II collider, at an e+e- center-of-mass energy of 10.6 GeV. From the analysis of the p anti-p invariant mass…

High Energy Physics - Experiment · Physics 2013-05-15 The BABAR Collaboration

We have measured the branching fraction, longitudinal polarization fraction f_L, and the CP asymmetry coefficients A and S in B0 -> rho+rho- decays. These results are obtained from a 253 fb-1 data sample containing 275 million B\bar{B}…

High Energy Physics - Experiment · Physics 2019-08-14 K. Abe

We present a measurement of the branching fraction and the longitudinal polarization fraction of $B^{0}\rightarrow\rho^+\rho^-$ decays, as well as the time-dependent $CP$ violating parameters in decays into longitudinally polarized…

High Energy Physics - Experiment · Physics 2016-10-04 P. Vanhoefer , J. Dalseno , C. Kiesling , A. Abdesselam , I. Adachi , H. Aihara , S. Al Said , K. Arinstein , D. M. Asner , H. Atmacan , T. Aushev , T. Aziz , V. Babu , I. Badhrees , A. M. Bakich , V. Bansal , E. Barberio , P. Behera , B. Bhuyan , J. Biswal , A. Bobrov , A. Bozek , M. Bracko , T. E. Browder , D. Cervenkov , P. Chang , V. Chekelian , A. Chen , B. G. Cheon , K. Chilikin , R. Chistov , V. Chobanova , S. -K. Choi , Y. Choi , D. Cinabro , M. Danilov , N. Dash , J. Dingfelder , Z. Dolezal , Z. Drasal , D. Dutta , S. Eidelman , H. Farhat , J. E. Fast , T. Ferber , B. G. Fulsom , V. Gaur , N. Gabyshev , A. Garmash , R. Gillard , Y. M. Goh , P. Goldenzweig , B. Golob , D. Greenwald , J. Haba , P. Hamer , T. Hara , K. Hayasaka , H. Hayashii , X. H. He , T. Horiguchi , W. -S. Hou , T. Iijima , K. Inami , A. Ishikawa , R. Itoh , Y. Iwasaki , W. W. Jacobs , I. Jaegle , D. Joffe , K. K. Joo , T. Julius , K. H. Kang , E. Kato , P. Katrenko , T. Kawasaki , D. Y. Kim , H. J. Kim , J. B. Kim , J. H. Kim , K. T. Kim , M. J. Kim , S. H. Kim , Y. J. Kim , K. Kinoshita , B. R. Ko , S. Korpar , P. Krizan , P. Krokovny , T. Kuhr , T. Kumita , A. Kuzmin , Y. -J. Kwon , I. S. Lee , L. Li , Y. Li , L. Li Gioi , J. Libby , D. Liventsev , P. Lukin , M. Masuda , D. Matvienko , K. Miyabayashi , H. Miyata , R. Mizuk , G. B. Mohanty , S. Mohanty , A. Moll , H. K. Moon , T. Mori , E. Nakano , M. Nakao , T. Nanut , Z. Natkaniec , . Nayak , N. K. Nisar , S. Nishida , S. Ogawa , S. Okuno , P. Pakhlov , G. Pakhlova , B. Pal , C. W. Park , H. Park , T. K. Pedlar , R. Pestotnik , M. Petric , L. E. Piilonen , C. Pulvermacher , E. Ribezl , M. Ritter , A. Rostomyan , H. Sahoo , Y. Sakai , S. Sandilya , L. Santelj , T. Sanuki , Y. Sato , V. Savinov , O. Schneider , G. Schnell , C. Schwanda , A. J. Schwartz , Y. Seino , K. Senyo , O. Seon , M. E. Sevior , V. Shebalin , C. P. Shen , T. -A. Shibata , J. -G. Shiu , F. Simon , Y. -S. Sohn , A. Sokolov , E. Solovieva , M. Staric , M. Sumihama , T. Sumiyoshi , U. Tamponi , Y. Teramoto , K. Trabelsi , M. Uchida , T. Uglov , Y. Unno , S. Uno , Y. Usov , C. Van Hulse , G. Varner , A. Vinokurova , A. Vossen , M. N. Wagner , C. H. Wang , M. -Z. Wang , P. Wang , M. Watanabe , Y. Watanabe , E. Won , H. Yamamoto , J. Yamaoka , S. Yashchenko , H. Ye , Y. Yook , Y. Yusa , Z. P. Zhang , V. Zhilich , V. Zhulanov , A. Zupanc

We study the reaction e+e- --> e+e-pi0 and measure the gamma gamma* --> pi0 transition form factor in the momentum transfer range from 4 to 40 GeV^2. The analysis is based on 442 fb^-1 of integrated luminosity collected at PEP-II with the…

High Energy Physics - Experiment · Physics 2010-04-12 The BABAR Collaboration , B. Aubert

In the first part of the document I describe in a general way the $\gamma / \phi_3$ extraction and compare the experimental environments. I then switch to the available results from the CDF experiment. In the third part I present early…

High Energy Physics - Experiment · Physics 2019-08-14 Marie-Hélène Schune

We report an observation of the decay B^\pm -> \phi \phi K^\pm and evidence for B^0 -> \phi \phi K^0. These results are based on a 414 fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e^+e^- collider…

High Energy Physics - Experiment · Physics 2009-02-19 The Belle Collaboration , Y. T. Shen , K. -F. Chen , P. Chang

We report measurements of radiative B decays with K eta gamma final states, using a data sample of 140 /fb recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- asymmetric energy collider. We observe B -> K eta…

High Energy Physics - Experiment · Physics 2019-08-14 K. Abe

We review recent results from the Belle experiment, which took data at the KEKB asymmetric-energy e+e- collider in Japan. The experiment recorded about 1000 fb^{-1} of data running mainly at the \Upsilon(4S) and \Upsilon(5S) resonances. The…

High Energy Physics - Experiment · Physics 2017-01-04 Zachary King , A. J. Schwartz

We explore the possibility of measuring the CKM parameter gamma using CP tagged decays at a very high luminosity e+e- B Factory. A new collider capable of integrating as much as 10 inverse attobarns per year is being discussed as a possible…

High Energy Physics - Phenomenology · Physics 2014-11-17 Adam F. Falk

We present measurements of time-dependent CP violation parameters in B0 --> K0 PI0, B0 --> Ks Pi+ Pi- and B0 --> Ks K+ K- decays. The latter two are extracted using time-dependent Dalitz plot analyses. These results are obtained from a…

High Energy Physics - Experiment · Physics 2008-10-16 J. Dalseno