Belle results on time dependent CP violation in B decays

Hirokazu Ishino

doi:10.1142/S0217751X05021531

Belle results on time dependent CP violation in B decays

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

Abstract

We report on measurements of time-dependent CP-violation parameters in neutral B meson systems based on a 140fb^-1 data sample collected at the γ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e⁺e^- collider. One B meson is fully reconstructed in one of the CP eigenstate decay channels, and its flavor is identified from the decay products of the accompanying B meson. The CP-violation parameters are extracted from the asymmetries in the distributions of the proper-time intervals between the two B decays. The parameter sin 2φ₁ is measured with the decay modes including the b → c tree and b → s penguin transitions, and sin 2φ₂ is obtained from the decay mode B → π⁺π^-. A brief discussion of the φ₃ measurements with B → D^(*)∓π± decays is also given.

Original language	English
Pages (from-to)	365-374
Number of pages	10
Journal	International Journal of Modern Physics A
Volume	20
Issue number	2-3
DOIs	https://doi.org/10.1142/S0217751X05021531
Publication status	Published - 2005
Externally published	Yes

Keywords

CKM matrix
CP-violation

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics
Astronomy and Astrophysics

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10.1142/S0217751X05021531

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title = "Belle results on time dependent CP violation in B decays",

abstract = "We report on measurements of time-dependent CP-violation parameters in neutral B meson systems based on a 140fb-1 data sample collected at the γ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One B meson is fully reconstructed in one of the CP eigenstate decay channels, and its flavor is identified from the decay products of the accompanying B meson. The CP-violation parameters are extracted from the asymmetries in the distributions of the proper-time intervals between the two B decays. The parameter sin 2φ1 is measured with the decay modes including the b → c tree and b → s penguin transitions, and sin 2φ2 is obtained from the decay mode B → π+π-. A brief discussion of the φ3 measurements with B → D(*)∓π± decays is also given.",

keywords = "CKM matrix, CP-violation",

author = "Hirokazu Ishino",

note = "Funding Information: We wish to thank the KEKB accelerator group for the excellent operation of the KEKB accelerator. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology of Japan and the Japan Society for the Promotion of Science; the Australian Research Council and the Australian Department of Education, Science and Training; the National Science Foundation of China under contract No. 10175071; the Department of Science and Technology of India; the BK21 program of the Ministry of Education of Korea and the CHEP SRC program of the Korea Science and Engineering Foundation; the Polish State Committee for Science Research under contract No. 2P03B 01324; the Ministry of Science and Technology of the Russian Federation; the Ministry of Education, Science and Sport of the Republic of Slovenia; the National Science Council and the Ministry of Education of Taiwan; and the U.S. Department of Energy.",

year = "2005",

doi = "10.1142/S0217751X05021531",

language = "English",

volume = "20",

pages = "365--374",

journal = "International Journal of Modern Physics A",

issn = "0217-751X",

publisher = "World Scientific Publishing Co. Pte Ltd",

number = "2-3",

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TY - JOUR

T1 - Belle results on time dependent CP violation in B decays

AU - Ishino, Hirokazu

N1 - Funding Information: We wish to thank the KEKB accelerator group for the excellent operation of the KEKB accelerator. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology of Japan and the Japan Society for the Promotion of Science; the Australian Research Council and the Australian Department of Education, Science and Training; the National Science Foundation of China under contract No. 10175071; the Department of Science and Technology of India; the BK21 program of the Ministry of Education of Korea and the CHEP SRC program of the Korea Science and Engineering Foundation; the Polish State Committee for Science Research under contract No. 2P03B 01324; the Ministry of Science and Technology of the Russian Federation; the Ministry of Education, Science and Sport of the Republic of Slovenia; the National Science Council and the Ministry of Education of Taiwan; and the U.S. Department of Energy.

PY - 2005

Y1 - 2005

N2 - We report on measurements of time-dependent CP-violation parameters in neutral B meson systems based on a 140fb-1 data sample collected at the γ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One B meson is fully reconstructed in one of the CP eigenstate decay channels, and its flavor is identified from the decay products of the accompanying B meson. The CP-violation parameters are extracted from the asymmetries in the distributions of the proper-time intervals between the two B decays. The parameter sin 2φ1 is measured with the decay modes including the b → c tree and b → s penguin transitions, and sin 2φ2 is obtained from the decay mode B → π+π-. A brief discussion of the φ3 measurements with B → D(*)∓π± decays is also given.

AB - We report on measurements of time-dependent CP-violation parameters in neutral B meson systems based on a 140fb-1 data sample collected at the γ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One B meson is fully reconstructed in one of the CP eigenstate decay channels, and its flavor is identified from the decay products of the accompanying B meson. The CP-violation parameters are extracted from the asymmetries in the distributions of the proper-time intervals between the two B decays. The parameter sin 2φ1 is measured with the decay modes including the b → c tree and b → s penguin transitions, and sin 2φ2 is obtained from the decay mode B → π+π-. A brief discussion of the φ3 measurements with B → D(*)∓π± decays is also given.

KW - CKM matrix

KW - CP-violation

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Belle results on time dependent CP violation in B decays

Abstract

Keywords

ASJC Scopus subject areas

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