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Evidence for CP violation in B+K*(892)+π0 from a Dalitz plot analysis of B+KS0π+π0 decays

Journal Article · · Physical Review D
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We report a Dalitz plot analysis of charmless hadronic decays of charged B mesons to the final state K0Sπ+π0 using the full BABAR data set of 470.9 ± 2.8 million B¯B 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+6.0–0.0) × 10–6 and ACP(B+ → K0π+π0) = 0.07 ± 0.05 ± 0.03+0.02–0.03, 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+0.04–0.02. The significance of this asymmetry, including systematic and model uncertainties, is 3.4 standard deviations. As a result, we also measure the branching fractions and CP asymmetries for three other intermediate decay modes.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Contributing Organization:
The BaBar Collaboration
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515
OSTI ID:
1417668
Alternate ID(s):
OSTI ID: 1421821
OSTI ID: 1395922
Report Number(s):
SLAC-PUB--16186
Journal Information:
Physical Review D, Journal Name: Physical Review D Journal Issue: 7 Vol. 96; ISSN PRVDAQ; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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