Measurement of the B+/B0 production ratio in e+e- collisions at the ϒ (4S) resonance using B →J/ψ (ℓℓ)K decays at Belle

Belle Collaboration

doi:10.1103/PhysRevD.107.L031102

Measurement of the B+/B0 production ratio in e+e- collisions at the ϒ (4S) resonance using B →J/ψ (ℓℓ)K decays at Belle

Belle Collaboration

Department of Physics

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20 Scopus citations

Abstract

We measure the ratio of branching fractions for the ϒ(4S) decays to B+B- and B0B¯0 using B+→J/ψ(ℓℓ)K+ and B0→J/ψ(ℓℓ)K0 samples, where J/ψ(ℓℓ) stands for J/ψ→ℓ+ℓ- (ℓ=e or μ), with 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector. We find the decay rate ratio of ϒ(4S)→B+B- over ϒ(4S)→B0B¯0 to be 1.065±0.012±0.019±0.047, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in B→J/ψ(ℓℓ)K.

Original language	English
Article number	L031102
Journal	Physical Review D
Volume	107
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.107.L031102
State	Published - 1 Feb 2023

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10.1103/PhysRevD.107.L031102

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@article{72efc6a6bcfb4402b8e6810b2d26173c,

title = "Measurement of the B+/B0 production ratio in e+e- collisions at the ϒ (4S) resonance using B →J/ψ (ℓℓ)K decays at Belle",

abstract = "We measure the ratio of branching fractions for the ϒ(4S) decays to B+B- and B0B¯0 using B+→J/ψ(ℓℓ)K+ and B0→J/ψ(ℓℓ)K0 samples, where J/ψ(ℓℓ) stands for J/ψ→ℓ+ℓ- (ℓ=e or μ), with 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector. We find the decay rate ratio of ϒ(4S)→B+B- over ϒ(4S)→B0B¯0 to be 1.065±0.012±0.019±0.047, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in B→J/ψ(ℓℓ)K.",

author = "\{Belle Collaboration\} and S. Choudhury and S. Sandilya and K. Trabelsi and A. Giri and I. Adachi and H. Aihara and Asner, \{D. M.\} and H. Atmacan and T. Aushev and R. Ayad and V. Babu and S. Bahinipati and P. Behera and K. Belous and J. Bennett and M. Bessner and V. Bhardwaj and B. Bhuyan and T. Bilka and D. Bodrov and G. Bonvicini and J. Borah and A. Bozek and M. Bra{\v c}ko and P. Branchini and Browder, \{T. E.\} and A. Budano and M. Campajola and D. {\v C}ervenkov and Chang, \{M. C.\} and C. Chen and Cheon, \{B. G.\} and K. Chilikin and Cho, \{H. E.\} and K. Cho and Cho, \{S. J.\} and Choi, \{S. K.\} and Y. Choi and D. Cinabro and S. Das and \{De Pietro\}, G. and \{Di Capua\}, F. and J. Dingfelder and Z. Dole{\v Z}al and Dong, \{T. V.\} and D. Epifanov and D. Ferlewicz and Fulsom, \{B. G.\} and R. Garg and Kang, \{K. H.\}",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society.",

year = "2023",

month = feb,

day = "1",

doi = "10.1103/PhysRevD.107.L031102",

language = "English",

volume = "107",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "3",

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TY - JOUR

T1 - Measurement of the B+/B0 production ratio in e+e- collisions at the ϒ (4S) resonance using B →J/ψ (ℓℓ)K decays at Belle

AU - Belle Collaboration

AU - Choudhury, S.

AU - Sandilya, S.

AU - Trabelsi, K.

AU - Giri, A.

AU - Adachi, I.

AU - Aihara, H.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Bahinipati, S.

AU - Behera, P.

AU - Belous, K.

AU - Bennett, J.

AU - Bessner, M.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Bilka, T.

AU - Bodrov, D.

AU - Bonvicini, G.

AU - Borah, J.

AU - Bozek, A.

AU - Bračko, M.

AU - Branchini, P.

AU - Browder, T. E.

AU - Budano, A.

AU - Campajola, M.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chen, C.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, H. E.

AU - Cho, K.

AU - Cho, S. J.

AU - Choi, S. K.

AU - Choi, Y.

AU - Cinabro, D.

AU - Das, S.

AU - De Pietro, G.

AU - Di Capua, F.

AU - Dingfelder, J.

AU - DoleŽal, Z.

AU - Dong, T. V.

AU - Epifanov, D.

AU - Ferlewicz, D.

AU - Fulsom, B. G.

AU - Garg, R.

AU - Kang, K. H.

PY - 2023/2/1

Y1 - 2023/2/1

N2 - We measure the ratio of branching fractions for the ϒ(4S) decays to B+B- and B0B¯0 using B+→J/ψ(ℓℓ)K+ and B0→J/ψ(ℓℓ)K0 samples, where J/ψ(ℓℓ) stands for J/ψ→ℓ+ℓ- (ℓ=e or μ), with 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector. We find the decay rate ratio of ϒ(4S)→B+B- over ϒ(4S)→B0B¯0 to be 1.065±0.012±0.019±0.047, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in B→J/ψ(ℓℓ)K.

AB - We measure the ratio of branching fractions for the ϒ(4S) decays to B+B- and B0B¯0 using B+→J/ψ(ℓℓ)K+ and B0→J/ψ(ℓℓ)K0 samples, where J/ψ(ℓℓ) stands for J/ψ→ℓ+ℓ- (ℓ=e or μ), with 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector. We find the decay rate ratio of ϒ(4S)→B+B- over ϒ(4S)→B0B¯0 to be 1.065±0.012±0.019±0.047, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in B→J/ψ(ℓℓ)K.

UR - https://www.scopus.com/pages/publications/85149623973

U2 - 10.1103/PhysRevD.107.L031102

DO - 10.1103/PhysRevD.107.L031102

M3 - Article

AN - SCOPUS:85149623973

SN - 2470-0010

VL - 107

JO - Physical Review D

JF - Physical Review D

IS - 3

M1 - L031102

ER -

Measurement of the B+/B0 production ratio in e+e- collisions at the ϒ (4S) resonance using B →J/ψ (ℓℓ)K decays at Belle

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