Evidence for CP violation in B+ →k∗ (892)+π0 from a Dalitz plot analysis of B+ → KS0 π+π0 decays

(The B aBar Collaboration)

doi:10.1103/PhysRevD.96.072001

Evidence for CP violation in B+ →k∗ (892)+π0 from a Dalitz plot analysis of B+ → KS0 π+π0 decays

(The B aBar Collaboration)

Université Savoie Mont Blanc
University of Barcelona
INFN Sezione di Bari
Università degli studi di Bari Aldo Moro
University of Bergen
University of California, Berkeley
Ruhr-University Bochum
University of British Columbia
Brunel University London
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
Novosibirsk State University
Novosibirsk State Technical University
Long Beach VA and University of California
University of California, Riverside
University of California, Santa Barbara
University of California at Santa Cruz
California Institute of Technology
University of Cincinnati
University of Colorado Boulder
Cooperative Institute for Research in the Atmosphere
University of Tabuk
University of Dortmund
University of Edinburgh
Sezione INFN di Ferrara
University of Ferrara
LNF-INFN
University of Perugia
Sezione di Genova
University of Genoa
Department of Biosciences and Bioengineering
University of Heidelberg
Humboldt-Universität zu Berlin
University of Iowa
Iowa State University
Jazan University
Johns Hopkins University
Laboratoire de l'Accélérateur Linéaire
Université Paris-Sud
Lawrence Livermore National Laboratory
University of Liverpool
Queen Mary University of London
Royal Holloway University of London
University of Louisville
Johannes Gutenberg University
University of Manchester
University of Huddersfield
University of Maryland, College Park
Massachusetts Institute of Technology
McGill University
Sezione INFN di Milano
University of Milano
University of Mississippi
Universety of South Alabama
Universite de Montreal
INFN Sezione di Napoli
University of Naples Federico II
Science Park 105
University of Notre Dame
The Ohio State University
INFN
University of Padova
Universités Paris VI and VII
INFN Sezione di Perugia
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
University of Pisa
Dipartimento di Scienze Biomediche
Scuola Normale Superiore di Pisa
Princeton University
Sezione di Roma
Dipartimento di Fisica
Universität Rostock
CCLRC Rutherford Appleton Laboratory
CEA/UVSQ/CNRS
Stanford Linear Accelerator Center
University of South Carolina
Southern Methodist University
Stanford University
State University of New York Albany
Tel Aviv University
University of Tennessee
The University of Texas at Austin
University of Texas
INFN Sezione di Torino
University of Turin
INFN Sezione di Trieste
University of Trieste
University of Valencia
University of Victoria
University of Warwick
University of Wisconsin-Madison

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

We report a Dalitz plot analysis of charmless hadronic decays of charged B mesons to the final state KS0π+π0 using the full BABAR data set of 470.9±2.8 million BB 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±2.1-0.0+6.0)×10-6 and ACP(B+→K0π+π0)=0.07±0.05±0.03-0.03+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: ACP(B+→K∗(892)+π0)=-0.52±0.14±0.04-0.02+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.

langue originale	Anglais
Numéro d'article	072001
journal	Physical Review D
Volume	96
Numéro de publication	7
Les DOIs	https://doi.org/10.1103/PhysRevD.96.072001
état	Publié - 2 oct. 2017

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10.1103/PhysRevD.96.072001

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@article{5747ff7f21e1438da261b94184bd16a1,

title = "Evidence for CP violation in B+ →k∗ (892)+π0 from a Dalitz plot analysis of B+ → KS0 π+π0 decays",

abstract = "We report a Dalitz plot analysis of charmless hadronic decays of charged B mesons to the final state KS0π+π0 using the full BABAR data set of 470.9±2.8 million BB 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±2.1-0.0+6.0)×10-6 and ACP(B+→K0π+π0)=0.07±0.05±0.03-0.03+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: ACP(B+→K∗(892)+π0)=-0.52±0.14±0.04-0.02+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.",

author = "\{(The B aBar Collaboration)\} and Lees, \{J. P.\} and V. Poireau and V. Tisserand and E. Grauges and A. Palano and G. Eigen and B. Stugu and Brown, \{D. N.\} and Kerth, \{L. T.\} and Kolomensky, \{Yu G.\} and Lee, \{M. J.\} and G. Lynch and H. Koch and T. Schroeder and C. Hearty and Mattison, \{T. S.\} and McKenna, \{J. A.\} and So, \{R. Y.\} and A. Khan and Blinov, \{V. E.\} and Buzykaev, \{A. R.\} and Druzhinin, \{V. P.\} and Golubev, \{V. B.\} and Kravchenko, \{E. A.\} and Onuchin, \{A. P.\} and Serednyakov, \{S. I.\} and Skovpen, \{Yu I.\} and Solodov, \{E. P.\} and Todyshev, \{K. Yu\} and Lankford, \{A. J.\} and B. Dey and Gary, \{J. W.\} and O. Long and \{Franco Sevilla\}, M. and Hong, \{T. M.\} and D. Kovalskyi and Richman, \{J. D.\} and West, \{C. A.\} and Eisner, \{A. M.\} and Lockman, \{W. S.\} and \{Panduro Vazquez\}, W. and Schumm, \{B. A.\} and A. Seiden and Chao, \{D. S.\} and Cheng, \{C. H.\} and B. Echenard and Flood, \{K. T.\} and Hitlin, \{D. G.\} and D. Bernard and M. Verderi",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = oct,

day = "2",

doi = "10.1103/PhysRevD.96.072001",

language = "English",

volume = "96",

journal = "Physical Review D",

issn = "2470-0010",

number = "7",

}

TY - JOUR

T1 - Evidence for CP violation in B+ →k∗ (892)+π0 from a Dalitz plot analysis of B+ → KS0 π+π0 decays

AU - (The B aBar Collaboration)

AU - Lees, J. P.

AU - Poireau, V.

AU - Tisserand, V.

AU - Grauges, E.

AU - Palano, A.

AU - Eigen, G.

AU - Stugu, B.

AU - Brown, D. N.

AU - Kerth, L. T.

AU - Kolomensky, Yu G.

AU - Lee, M. J.

AU - Lynch, G.

AU - Koch, H.

AU - Schroeder, T.

AU - Hearty, C.

AU - Mattison, T. S.

AU - McKenna, J. A.

AU - So, R. Y.

AU - Khan, A.

AU - Blinov, V. E.

AU - Buzykaev, A. R.

AU - Druzhinin, V. P.

AU - Golubev, V. B.

AU - Kravchenko, E. A.

AU - Onuchin, A. P.

AU - Serednyakov, S. I.

AU - Skovpen, Yu I.

AU - Solodov, E. P.

AU - Todyshev, K. Yu

AU - Lankford, A. J.

AU - Dey, B.

AU - Gary, J. W.

AU - Long, O.

AU - Franco Sevilla, M.

AU - Hong, T. M.

AU - Kovalskyi, D.

AU - Richman, J. D.

AU - West, C. A.

AU - Eisner, A. M.

AU - Lockman, W. S.

AU - Panduro Vazquez, W.

AU - Schumm, B. A.

AU - Seiden, A.

AU - Chao, D. S.

AU - Cheng, C. H.

AU - Echenard, B.

AU - Flood, K. T.

AU - Hitlin, D. G.

AU - Bernard, D.

AU - Verderi, M.

PY - 2017/10/2

Y1 - 2017/10/2

N2 - We report a Dalitz plot analysis of charmless hadronic decays of charged B mesons to the final state KS0π+π0 using the full BABAR data set of 470.9±2.8 million BB 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±2.1-0.0+6.0)×10-6 and ACP(B+→K0π+π0)=0.07±0.05±0.03-0.03+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: ACP(B+→K∗(892)+π0)=-0.52±0.14±0.04-0.02+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.

AB - We report a Dalitz plot analysis of charmless hadronic decays of charged B mesons to the final state KS0π+π0 using the full BABAR data set of 470.9±2.8 million BB 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±2.1-0.0+6.0)×10-6 and ACP(B+→K0π+π0)=0.07±0.05±0.03-0.03+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: ACP(B+→K∗(892)+π0)=-0.52±0.14±0.04-0.02+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.

U2 - 10.1103/PhysRevD.96.072001

DO - 10.1103/PhysRevD.96.072001

M3 - Article

AN - SCOPUS:85033213898

SN - 2470-0010

VL - 96

JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - 072001

ER -

Evidence for CP violation in B+ →k∗ (892)+π0 from a Dalitz plot analysis of B+ → KS0 π+π0 decays

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