ScholarLens Back to search
2017•DSpace@MIT (Massachusetts Institute of Technology)Open access

Evidence for CP Violation in B⁺→K*(892)⁺π⁰ from a Dalitz Plot Analysis of B⁺→K[subscript S]⁰π⁺π⁰ Decays

J. P. Lees, V. Poireau, V. Tisserand, E. Graugés, ANTIMO PALANO, G. Eigen, B. Stugu, D. N. Brown, Leroy T. Kerth, Yu. G. Kolomensky, M. J. Lee, G. Lynch, H. Koch, T Schroeder, C. Hearty, T. S. Mattison, J. A. McKenna, R. Y. So, A. Khan, V. E. Blinov, А. Р. Бузыкаев, В. П. Дружинин, V. B. Golubev, Э. А. Кравченко, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, Korneliy Yu. Todyshev, A. J. Lankford, B. Dey, J. William Gary, O. Long, M. Franco Sevilla, T. M. Hong, D. Kovalskyi, J. D. Richman, C. A. West, A. M. Eisner, W. S. Lockman, J. G. Panduro Vazquez, B. A. Schumm, A. Seiden, D. S. Chao, C. H. Cheng, B. Echenard, K. T. Flood, David G. Hitlin, T. S. Miyashita, Piti Ongmongkolkul, Frank C. Porter, Markus Röhrken, R. Andreassen, Z. Huard, B. T. Meadows, B. G. Pushpawela, M. D. Sokoloff, L. Sun, P. C. Bloom, W. T. Ford, A. Gaz, J. G. Smith, S. R. Wagner, Rachid Ayad, W. H. Toki, B. Spaan, D. Bernard, M. Verderi, S. Playfer, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, L. Piemontese, Valentina Santoro, A. Calcaterra, Riccardo de Sangro, G. Finocchiaro, S. Martellotti, P. Patteri, I. M. Peruzzi, Marcello Piccolo, Matteo Rama, A. Zallo, R. Contri, M. R. Monge, Stefano Passaggio, Claudia Patrignani, B. Bhuyan, Vindhyawasini Prasad, A. Adametz, U. Uwer, H. Lacker, U. Mallik, Changyu Chen, J Cochran, S. Prell, H. Ahmed, Andrei V. Gritsan, N. Arnaud, M. Davier, D. Derkach, G. Grosdidier, F. Le Diberder, Amelie M. Lutz, B. Malaescu, Patrick Roudeau, A. Stocchi, Guy Henri Maurice Wormser, David J Lange, D. M. Wright, J. P. Coleman, J. R. Fry, E. Gabathuler, D. Hutchcroft, D. J. Payne, Christos Touramanis, Adrian John Bevan, Francesca Di Lodovico, R. Sacco, G. Cowan, C. L. Davis, A. G. Denig, M. Fritsch, W. Gradl, K. Grießinger, A. Hafner, Klaus R. Schubert, Roger John Barlow, George D. Lafferty, R. Cenci, B. Hamilton, Abolhassan Jawahery, D. A. Roberts, R. Cheaib, Piyush M. Patel, S. H. Robertson, N. Néri, F. Palombo, L. Cremaldi, R. Godang, D. J. Summers, Marc Simard, P. Taras, G. De Nardo, G. Onorato, C. Sciacca, Gerhard Raven, Colin P Jessop, J. M. LoSecco, K. Honscheid, R. D. Kass, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, Gabriele Simi, F. Simonetto, Roberto Stroili, S. Akar, E. Ben-Haim, M. Bomben, G. R. Bonneaud, H. Briand, G. Calderini, Jacques Chauveau, Ph. Leruste, Giovanni Marchiori, J. Ocariz, M. Biasini, E. Manoni, A. Rossi, Corrado Italo Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, M. Chrząszcz, F. Forti, M. A. Giorgi, A. Lusiani, B. Oberhof, Eugenio Paoloni, G. Rizzo, J. Walsh, D. Lopes Pegna, Joy Olsen, A. J. S. Smith, F. Anulli, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, A. Pilloni, G. Piredda, C. Bünger, Sabine Dittrich, O. Grünberg, M. Heß, T. Leddig, C. Voß, R. Waldi, T. Adye, E. O. Olaiya, F. F. Wilson, S. Emery, G. Vasseur, David A. Aston, D. J. Bard, C. Cartaro, M. R. Convery, J. Dorfan, G. P. Dubois-Felsmann, W. Dunwoodie, Marcus Ebert, R. C. Field, B. G. Fulsom, M. T. Graham, Carsten HAST, W. R. Innes, P. Kim, D. W. G. S. Leith, D. Lindemann, S. Luitz, V. Lüth, H. L. Lynch, David B MacFarlane, D. R. Muller, H. A. Neal, M. Perl, T. Pulliam, B. N. Ratcliff, Aaron J. Roodman, R. H. Schindler, A. Snyder, Dongbing Su, M. K. Sullivan, Jaroslav Va'vra, W. J. Wisniewski, H. W. Wulsin, M. V. Purohit, Jonathan R. Wilson, A. Randle-Conde, S. J. Sekula, M. Bellis, P. R. Burchat, E. M. T. Puccio, M. S. Alam, J. A. Ernst, R. Gorodeisky, Nurit Guttman, D. R. Peimer, Abner Soffer, S. M. Spanier, Jack L. Ritchie, R. F. Schwitters, J. M. Izen, X. C. Lou, F. Bianchi, F. De Mori, A. Filippi, D. Gamba, L. Lanceri, Lorenzo G. Vitale, F. Martínez-Vidal, A. Oyanguren, P. Villanueva-Pérez, Justin E Albert, Sw. Banerjee, Alexandre Beaulieu, F. U. Bernlochner, H. H. F. Choi, G. J. King, R. Kowalewski, M. J. Lewczuk, T. Lueck, I. M. Nugent, J. Michael Roney, Randall J. Sobie, N. Tasneem, T. Gershon, P. F. Harrison, T. Latham, H. R. Band, S. Dasu, Y. Pan, R. Prepost, Sau Lan Wu, R. Cowan

Open full text 0 citations

Abstract

We report a Dalitz plot analysis of charmless hadronic decays of charged B mesons to the final state K[subscript S]⁰π⁺π⁰ using the full BABAR data set of 470.9±2.8 million BB[over ¯] events collected at the Υ(4S) resonance. We measure the overall branching fraction and CP asymmetry to be B(B⁺→K⁰π⁺π⁰)=(31.8±1.8±2.1[subscript -0.0][superscript +6.0]×10⁻⁶ and A[subscript CP](B⁺→K⁰π⁺π⁰)=0.07±0.05±0.03[subscript -0.03][superscript +0.02], where the uncertainties are statistical, systematic, and due to the signal model, respectively. This is the first measurement of the branching fraction for B⁺→K⁰π⁺π⁰. We find first evidence of a CP asymmetry in B⁺→K*(892)⁺π⁰ decays: A[subscript CP](B⁺→K*(892)⁺π⁰)=-0.52±0.14±0.04[subscript -0.02][superscript +0.04] The significance of this asymmetry, including systematic and model uncertainties, is 3.4 standard deviations. We also measure the branching fractions and CP asymmetries for three other intermediate decay modes.

About this research paper

What this paper is about

We report a Dalitz plot analysis of charmless hadronic decays of charged B mesons to the final state K[subscript S]⁰π⁺π⁰ using the full BABAR data set of 470.9±2.8 million BB[over ¯] events collected at the Υ(4S) resonance. We measure the overall branching fraction and CP asymmetry to be B(B⁺→K⁰π⁺π⁰)=(31.8±1.8±2.1[subscript -0.0][superscript +6.0]×10⁻⁶ and A[subscript CP](B⁺→K⁰π⁺π⁰)=0.07±0.05±0.03[subscript -0.03][superscript +0.02], where the uncertainties are statistical, systematic, and due to the signal model, respectively. This is the first measurement of the branching fraction for B⁺→K⁰π⁺π⁰. We find first evidence of a CP asymmetry in B⁺→K*(892)⁺π⁰ decays: A[subscript CP](B⁺→K*(892)⁺π⁰)=-0.52±0.14±0.04[subscript -0.02][superscript +0.04] The significance of this asymmetry, including systematic and model uncertainties, is 3.4 standard deviations. We also measure the branching fractions and CP asymmetries for three other intermediate decay modes.

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

We report a Dalitz plot analysis of charmless hadronic decays of charged B mesons to the final state K[subscript S]⁰π⁺π⁰ using the full BABAR data set of 470.9±2.8 million BB[over ¯] events collected at the Υ(4S) resonance. We measure the overall branching fraction and CP asymmetry to be B(B⁺→K⁰π⁺π⁰)=(31.8±1.8±2.1[subscript -0.0][superscript +6.0]×10⁻⁶ and A[subscript CP](B⁺→K⁰π⁺π⁰)=0.07±0.05±0.03[subscript -0.03][superscript +0.02], where the uncertainties are statistical, systematic, and due to the signal model, respectively. This is the first measurement of the branching fraction for B⁺→K⁰π⁺π⁰. We find first evidence of a CP asymmetry in B⁺→K*(892)⁺π⁰ decays: A[subscript CP](B⁺→K*(892)⁺π⁰)=-0.52±0.14±0.04[subscript -0.02][superscript +0.04] The significance of this asymmetry, including systematic and model uncertainties, is 3.4 standard deviations. We also measure the branching fractions and CP asymmetries for three other intermediate decay modes.

Key concepts: Dalitz plot, Physics, CP violation, Particle physics, Nuclear physics, Plot (graphics), Meson, Mathematics

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Evidence for CP Violation in B⁺→K*(892)⁺π⁰ from a Dalitz Plot Analysis of B⁺→K[subscript S]⁰π⁺π⁰ Decays — Research Paper | ScholarLens