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
National Institute for Nuclear Physics
University of Bari
University of Bergen
University of California at 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
University of California at Irvine
University of California at Riverside
University of California at Santa Barbara
University of California at Santa Cruz
California Institute of Technology

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

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.

Original language	English
Article number	072001
Journal	Physical Review D
Volume	96
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.96.072001
State	Published - 2 Oct 2017
Externally published	Yes

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10.1103/PhysRevD.96.072001

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@article{a750de8e19e94dbb96263cd41fd92ef8,

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){\texttimes}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 Miyashita, \{T. S.\} and P. Ongmongkolkul",

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",

publisher = "American Physical Society",

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 - Miyashita, T. S.

AU - Ongmongkolkul, P.

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.

UR - https://www.scopus.com/pages/publications/85033213898

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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