Measurement of branching fraction and first evidence of CP violation in B⁰→a₁±(1260)π∓ decays

Dalseno, J.; Adachi, I.; Aihara, H.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Bay, A.; Belous, K.; Bhuyan, B.; Bozek, A.; Bračko, M.; Brovchenko, O.; Browder, T. E.; Chekelian, V.; Chen, A.; Chen, P.; Cheon, B. G.; Chilikin, K.; Chistov, R.; Cho, I.-S.; Cho, K.; Choi, Y.; Doležal, Z.; Drásal, Z.; Eidelman, S.; Fast, J. E.; Gaur, V.; Gabyshev, N.; Garmash, A.; Goh, Y. M.; Hayashii, H.; Horii, Y.; Hoshi, Y.; Hou, W.-S.; Hsiung, Y. B.; Hyun, H. J.; Iijima, T.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwabuchi, M.; Iwasaki, Y.; Iwashita, T.; Julius, T.; Kang, J. H.; Kiesling, C.; Kim, H. O.; Kim, J. B.; Kim, Y. J.; Kinoshita, K.; Ko, B. R.; Koblitz, S.; Kodyš, P.; Korpar, S.; Križan, P.; Krokovny, P.; Kronenbitter, B.; Kuhr, T.; Kumita, T.; Kwon, Y.-J.; Lee, S.-H.; Li, J.; Libby, J.; Liu, C.; Liu, Z. Q.; Louvot, R.; MacNaughton, J.; Matvienko, D.; McOnie, S.; Miyabayashi, K.; Miyata, H.; Miyazaki, Y.; Mohanty, G. B.; Mohapatra, D.; Moll, A.; Muramatsu, N.; Nakao, M.; Natkaniec, Z.; Nedelkovska, E.; Ng, C.; Nishida, S.; Nishimura, K.; Nitoh, O.; Ogawa, S.; Ohshima, T.; Okuno, S.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Park, H. K.; Pedlar, T. K.; Pestotnik, R.; Petrič, M.; Piilonen, L. E.; Prim, M.; Prothmann, K.; Ritter, M.; Röhrken, M.; Sahoo, H.; Sakai, Y.; Sanuki, T.; Schneider, O.; Schwanda, C.; Schwartz, A. J.; Senyo, K.; Seon, O.; Sevior, M. E.; Shapkin, M.; Shebalin, V.; Shen, C. P.; Shibata, T.-A.; Shiu, J.-G.; Sibidanov, A.; Simon, F.; Smerkol, P.; Sohn, Y.-S.; Solovieva, E.; Starič, M.; Sumihama, M.; Sumiyoshi, T.; Tatishvili, G.; Teramoto, Y.; Trabelsi, K.; Uchida, M.; Uehara, S.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Vanhoefer, P.; Varner, G.; Wang, C. H.; Wang, P.; Watanabe, M.; Watanabe, Y.; Williams, K. M.; Won, E.; Yabsley, B. D.; Yamashita, Y.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zupanc, A.

doi:10.1103/PhysRevD.86.092012

Title: Measurement of branching fraction and first evidence of CP violation in B⁰→a₁^±(1260)π^∓ decays

Journal Article · Mon Nov 26 00:00:00 EST 2012 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.86.092012· OSTI ID:1101822

Dalseno, J.; Adachi, I.; Aihara, H.; Asner, D. M.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Bay, A.; Belous, K.; Bhuyan, B.; Bozek, A.; Bračko, M.; Brovchenko, O.; Browder, T. E.; Chekelian, V.; Chen, A.; Chen, P.; Cheon, B. G.; Chilikin, K.; Chistov, R. more »

We present a measurement of the branching fraction and time-dependent CP violation parameters in B⁰→a^±₁(1260)π^∓ decays. The results are obtained from the final data sample containing 772×10⁶ BB¯¯¯ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e⁺e⁻ collider. We obtain the product branching fraction B(B⁰→a^±₁(1260)π^∓)×B(a^±₁(1260)→π^±π^∓π^±)=(11.1±1.0(stat)±1.4(syst))×10⁻⁶ and an upper limit on the product branching fraction for a possible decay with the same final state B(B⁰→a^±₂(1320)π^∓)×B(a^±₂(1320)→π^±π^∓π^±)<2.2×10⁻⁶at 90% CL. In a time-dependent measurement to extract CP asymmetries, we obtain the CP violation parameters ACP=–0.06±0.05(stat)±0.07(syst), CCP=–0.01±0.11(stat)±0.09(syst), SCP=–0.51±0.14(stat)±0.08(syst), representing time- and flavor-integrated direct, flavor-dependent direct and mixing-induced CP violation, respectively. Simultaneously, we also extract the CP-conserving parameters ΔC=+0.54±0.11(stat)±0.07(syst), ΔS=–0.09±0.14(stat)±0.06(syst), which, respectively, describe a rate difference and strong phase difference between the decay channels where the a^±₁ does not contain the spectator quark and those where it does. We find first evidence of mixing-induced CP violation in B⁰→a^±₁(1260)π^∓ decays with 3.1σ significance. The rate where the a^±₁ does not contain the spectator quark from the B meson is found to dominate the rate where it does at the 4.1σ level. However, there is no evidence for either time- and flavor-integrated direct CP violation or flavor-dependent direct CP violation.

View Accepted Manuscript (Publisher)

Cite

Export

Save

Sponsoring Organization:: USDOE

OSTI ID:: 1101822

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Vol. 86 Journal Issue: 9; ISSN 1550-7998

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 14 works

Citation information provided by
Web of Science

References (27)

Measurement of $C P$ -violating asymmetries in $B^{0} \to (ρ π)^{0}$ using a time-dependent Dalitz plot analysis Aubert, B.; Bona, M.; Boutigny, D. Physical Review D, Vol. 76, Issue 1 https://doi.org/10.1103/PhysRevD.76.012004	journal	July 2007
CP violation and the CKM matrix: assessing the impact of the asymmetric B factories Charles, J.; Höcker, A.; Lacker, H. The European Physical Journal C, Vol. 41, Issue 1 https://doi.org/10.1140/epjc/s2005-02169-1	journal	May 2005
Unitary Symmetry and Leptonic Decays Cabibbo, Nicola Physical Review Letters, Vol. 10, Issue 12 https://doi.org/10.1103/PhysRevLett.10.531	journal	June 1963
Nonleptonic two-body $B$ decays including axial-vector mesons in the final state Calderón, G.; Muñoz, J. H.; Vera, C. E. Physical Review D, Vol. 76, Issue 9 https://doi.org/10.1103/PhysRevD.76.094019	journal	November 2007
Review of Particle Physics Nakamura, K. Journal of Physics G: Nuclear and Particle Physics, Vol. 37, Issue 7A https://doi.org/10.1088/0954-3899/37/7A/075021	journal	July 2010
Precise Measurement of the $C P$ Violation Parameter $\sin 2 ϕ_{1}$ in $B^{0} \to (c \bar{c}) K^{0}$ Decays Adachi, I.; Aihara, H.; Asner, D. M. Physical Review Letters, Vol. 108, Issue 17 https://doi.org/10.1103/PhysRevLett.108.171802	journal	April 2012
The use of Multiple Measurements in Taxonomic Problems Fisher, R. A. Annals of Eugenics, Vol. 7, Issue 2 https://doi.org/10.1111/j.1469-1809.1936.tb02137.x	journal	September 1936
Isospin analysis of CP asymmetries in B decays Gronau, Michael; London, David Physical Review Letters, Vol. 65, Issue 27 https://doi.org/10.1103/PhysRevLett.65.3381	journal	December 1990
Measurement of time-dependent $C P$ asymmetry in $B^{0} \to c \bar{c} K^{(*) 0}$ decays Aubert, B.; Karyotakis, Y.; Lees, J. P. Physical Review D, Vol. 79, Issue 7 https://doi.org/10.1103/PhysRevD.79.072009	journal	April 2009
Weak phase $α$ from $B^{0} \to a_{1}^{\pm} (1260) π^{\mp}$ Gronau, M.; Zupan, J. Physical Review D, Vol. 73, Issue 5 https://doi.org/10.1103/PhysRevD.73.057502	journal	March 2006
Nonleptonic $B$ decays to axial-vector mesons and factorization Laporta, V.; Nardulli, G.; Pham, T. N. Physical Review D, Vol. 74, Issue 5 https://doi.org/10.1103/PhysRevD.74.054035	journal	September 2006
Status of the Belle silicon vertex detector Natkaniec, Z.; Aihara, H.; Asano, Y. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 560, Issue 1 https://doi.org/10.1016/j.nima.2005.11.228	journal	May 2006
Measurements of $C P$ -Violating Asymmetries in $B^{0} \to a_{1}^{\pm} (1260) π^{\mp}$ Decays Aubert, B.; Bona, M.; Boutigny, D. Physical Review Letters, Vol. 98, Issue 18 https://doi.org/10.1103/PhysRevLett.98.181803	journal	May 2007
C P -Violation in the Renormalizable Theory of Weak Interaction Kobayashi, Makoto; Maskawa, Toshihide Progress of Theoretical Physics, Vol. 49, Issue 2 https://doi.org/10.1143/PTP.49.652	journal	February 1973
Hadronic charmless $B$ decays $B \to A P$ Cheng, Hai-Yang; Yang, Kwei-Chou Physical Review D, Vol. 76, Issue 11 https://doi.org/10.1103/PhysRevD.76.114020	journal	December 2007
Observation of $B^{0}$ Meson Decay to $a_{1}^{\pm} (1260) π^{\mp}$ Aubert, B.; Barate, R.; Bona, M. Physical Review Letters, Vol. 97, Issue 5 https://doi.org/10.1103/PhysRevLett.97.051802	journal	August 2006
Proper-time resolution function for measurement of time evolution of B mesons at the KEK B-Factory Tajima, H.; Aihara, H.; Higuchi, T. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 533, Issue 3 https://doi.org/10.1016/j.nima.2004.07.199	journal	November 2004
Measurement of branching fractions of $B$ decays to $K_{1} (1270) π$ and $K_{1} (1400) π$ and determination of the CKM angle $α$ from $B^{0} \to a_{1} (1260)^{\pm} π^{\mp}$ Aubert, B.; Karyotakis, Y.; Lees, J. P. Physical Review D, Vol. 81, Issue 5 https://doi.org/10.1103/PhysRevD.81.052009	journal	March 2010
Neutral <mml:math altimg="si203.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>B</mml:mi></mml:math> flavor tagging for the measurement of mixing-induced <mml:math altimg="si204.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi mathvariant="italic">CP</mml:mi></mml:math> violation at Belle Kakuno, H.; Hara, K.; Casey, B. C. K. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 533, Issue 3 https://doi.org/10.1016/j.nima.2004.06.159	journal	November 2004
Observation of Direct $C P$ Violation in $B^{0} \to π^{+} π^{-}$ Decays and Model-Independent Constraints on the Quark-Mixing Angle $ϕ_{2}$ Ishino, H.; Abe, K.; Abe, K. Physical Review Letters, Vol. 98, Issue 21 https://doi.org/10.1103/PhysRevLett.98.211801	journal	May 2007
Improved measurement of $C P$ -violating parameters in $B \to ρ^{+} ρ^{-}$ decays Somov, A.; Schwartz, A. J.; Adachi, I. Physical Review D, Vol. 76, Issue 1 https://doi.org/10.1103/PhysRevD.76.011104	journal	July 2007
Study of $B^{0} \to ρ^{+} ρ^{-}$ decays and constraints on the CKM angle $α$ Aubert, B.; Bona, M.; Boutigny, D. Physical Review D, Vol. 76, Issue 5 https://doi.org/10.1103/PhysRevD.76.052007	journal	September 2007
Overview of the KEKB accelerators Kurokawa, S.; Kikutani, E. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 499, Issue 1 https://doi.org/10.1016/S0168-9002(02)01771-0	journal	February 2003
The Belle detector Abashian, A.; Gotow, K.; Morgan, N. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 479, Issue 1 https://doi.org/10.1016/S0168-9002(01)02013-7	journal	February 2002
Measurement of $C P$ Asymmetry in a Time-Dependent Dalitz Analysis of $B^{0} \to (ρ π)^{0}$ and a Constraint on the Quark Mixing Matrix Angle $ϕ_{2}$ Kusaka, A.; Wang, C. C.; Ishino, H. Physical Review Letters, Vol. 98, Issue 22 https://doi.org/10.1103/PhysRevLett.98.221602	journal	June 2007
Impact of tag-side interference on time-dependent CP asymmetry measurements using coherent $B^{0} B^{0}$ pairs Long, Owen; Baak, Max; Cahn, Robert N. Physical Review D, Vol. 68, Issue 3 https://doi.org/10.1103/PhysRevD.68.034010	journal	August 2003
A study of the centrally produced ?+???0 system formed in the reactionpp?p f (?+???0)p s at 300 GeV/c Armstrong, T. A.; Benayoun, M.; Beusch, W. Zeitschrift f�r Physik C Particles and Fields, Vol. 48, Issue 2 https://doi.org/10.1007/BF01554468	journal	June 1990

Similar Records

First Evidence for

\cos 2 β > 0

and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity

Journal Article · Wed Dec 26 00:00:00 EST 2018 · Physical Review Letters · OSTI ID:1101822

Adachi, I.; Adye, T.; Ahmed, H.; +420 more

Measurement of branching fractions and search for CP violation in $D^0 → π^+π^-η, D^0 → K^+K^-η$, and $D^0 → Φη$ at Belle

Journal Article · Mon Sep 13 00:00:00 EDT 2021 · Journal of High Energy Physics (Online) · OSTI ID:1101822

Li, L. K.; Schwartz, A. J.; Kinoshita, K.; +186 more

Measurement of branching fraction and time-dependent CP asymmetry parameters in B{sup 0}{yields}D*{sup +}D*{sup -}K{sub S}{sup 0} decays

Journal Article · Mon Oct 01 00:00:00 EDT 2007 · Physical Review. D, Particles Fields · OSTI ID:1101822

Dalseno, J; Moloney, G R; Sevior, M E; +17 more

Title: Measurement of branching fraction and first evidence of CP violation in B⁰→a₁±(1260)π∓ decays

Citation Formats

References (27)

Similar Records

Related Subjects

Title: Measurement of branching fraction and first evidence of CP violation in B⁰→a₁^±(1260)π^∓ decays