Measurement of time-dependent CP violation in B0 → KS0 π0π0 decays

Belle Collaboration

Research output: Contribution to journalArticle

Abstract

We report a measurement of time-dependent CP violation in B0→KS0π0π0 decays using a data sample of 772×106 BB pairs collected by the Belle experiment running at the ?(4S) resonance at the KEKB e+e- collider. This decay proceeds mainly via a b→sdd "penguin" amplitude. The results are sin2φ1eff=0.92-0.31+0.27 (stat.) ±0.11 (syst.) and A=0.28±0.21 (stat.) ±0.04 (syst.), which are the most precise measurements of CP violation in this decay mode to date. The value for the CP-violating parameter sin2φ1eff is consistent with that obtained using decay modes proceeding via a b→ccs "tree" amplitude.

Original languageEnglish
Article number011102
JournalPhysical Review D
Volume99
Issue number1
DOIs
Publication statusPublished - 2019 Jan 1

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CP violation
decay

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

@article{8da2ae2db9d84bdaa562daebe7d6ec41,
title = "Measurement of time-dependent CP violation in B0 → KS0 π0π0 decays",
abstract = "We report a measurement of time-dependent CP violation in B0→KS0π0π0 decays using a data sample of 772×106 BB pairs collected by the Belle experiment running at the ?(4S) resonance at the KEKB e+e- collider. This decay proceeds mainly via a b→sdd {"}penguin{"} amplitude. The results are sin2φ1eff=0.92-0.31+0.27 (stat.) ±0.11 (syst.) and A=0.28±0.21 (stat.) ±0.04 (syst.), which are the most precise measurements of CP violation in this decay mode to date. The value for the CP-violating parameter sin2φ1eff is consistent with that obtained using decay modes proceeding via a b→ccs {"}tree{"} amplitude.",
author = "{Belle Collaboration} and Y. Yusa and H. Aihara and {Al Said}, S. and Asner, {D. M.} and H. Atmacan and V. Aulchenko and T. Aushev and R. Ayad and V. Babu and I. Badhrees and S. Bahinipati and Bakich, {A. M.} and V. Bansal and P. Behera and V. Bhardwaj and B. Bhuyan and J. Biswal and A. Bozek and M. Bračko and Browder, {T. E.} and L. Cao and D. Červenkov and V. Chekelian and A. Chen and Cheon, {B. G.} and K. Chilikin and Choi, {S. K.} and Y. Choi and D. Cinabro and S. Cunliffe and N. Dash and {Di Carlo}, S. and Dong, {T. V.} and Z. Dr{\'a}sal and S. Eidelman and D. Epifanov and Fast, {J. E.} and Fulsom, {B. G.} and R. Garg and V. Gaur and A. Garmash and A. Giri and P. Goldenzweig and B. Golob and Y. Guan and J. Haba and K. Hayasaka and H. Hayashii and S. Hirose and K. Inami",
year = "2019",
month = "1",
day = "1",
doi = "10.1103/PhysRevD.99.011102",
language = "English",
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journal = "Physical Review D",
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Measurement of time-dependent CP violation in B0 → KS0 π0π0 decays. / Belle Collaboration.

In: Physical Review D, Vol. 99, No. 1, 011102, 01.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Measurement of time-dependent CP violation in B0 → KS0 π0π0 decays

AU - Belle Collaboration

AU - Yusa, Y.

AU - Aihara, H.

AU - Al Said, S.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Badhrees, I.

AU - Bahinipati, S.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Behera, P.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Biswal, J.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Cao, L.

AU - Červenkov, D.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Choi, S. K.

AU - Choi, Y.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - Dash, N.

AU - Di Carlo, S.

AU - Dong, T. V.

AU - Drásal, Z.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Fast, J. E.

AU - Fulsom, B. G.

AU - Garg, R.

AU - Gaur, V.

AU - Garmash, A.

AU - Giri, A.

AU - Goldenzweig, P.

AU - Golob, B.

AU - Guan, Y.

AU - Haba, J.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Hirose, S.

AU - Inami, K.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - We report a measurement of time-dependent CP violation in B0→KS0π0π0 decays using a data sample of 772×106 BB pairs collected by the Belle experiment running at the ?(4S) resonance at the KEKB e+e- collider. This decay proceeds mainly via a b→sdd "penguin" amplitude. The results are sin2φ1eff=0.92-0.31+0.27 (stat.) ±0.11 (syst.) and A=0.28±0.21 (stat.) ±0.04 (syst.), which are the most precise measurements of CP violation in this decay mode to date. The value for the CP-violating parameter sin2φ1eff is consistent with that obtained using decay modes proceeding via a b→ccs "tree" amplitude.

AB - We report a measurement of time-dependent CP violation in B0→KS0π0π0 decays using a data sample of 772×106 BB pairs collected by the Belle experiment running at the ?(4S) resonance at the KEKB e+e- collider. This decay proceeds mainly via a b→sdd "penguin" amplitude. The results are sin2φ1eff=0.92-0.31+0.27 (stat.) ±0.11 (syst.) and A=0.28±0.21 (stat.) ±0.04 (syst.), which are the most precise measurements of CP violation in this decay mode to date. The value for the CP-violating parameter sin2φ1eff is consistent with that obtained using decay modes proceeding via a b→ccs "tree" amplitude.

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U2 - 10.1103/PhysRevD.99.011102

DO - 10.1103/PhysRevD.99.011102

M3 - Article

AN - SCOPUS:85061091385

VL - 99

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 1

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ER -