J/ψ and ψ′ production in hadronic Z0 decays

OPAL Collaboration

doi:10.1007/s002880050096

J/ψ and ψ′ production in hadronic Z⁰ decays

OPAL Collaboration

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

27 Scopus citations

Abstract

The production of J/ψ mesons in Z⁰ decays is studied using 3.6 million hadronic events recorded by the OPAL detector at LEP. The inclusive Z⁰ to J/ψ and b-quark to J/ψ branching ratios are measured from the total yield of J/ψ mesons, identified from their decays into lepton pairs. The J/ψ momentum distribution is used to study the fragmentation of b-quarks. The production rate of ψ′ mesons, identified from their decays into a J/ψ and a π⁺π^- pair, is measured as well. The following results are obtained: Br(Z⁰→J/ψ X) = (3.9 ± 0.2 ± 0.3) · 10^-3 and Br(Z⁰→ψ′ X) = (1.6 ± 0.3 ± 0.2) · 10^-3, where the first error is statistical and the second systematic. Finally the J/ψ sample is used to reconstruct exclusive b-hadron decays and calculate the corresponding b-hadron branching ratios and masses.

Original language	English
Pages (from-to)	197-209
Number of pages	13
Journal	Zeitschrift fur Physik C-Particles and Fields
Volume	70
Issue number	2
DOIs	https://doi.org/10.1007/s002880050096
State	Published - 1 Apr 1996
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1007/s002880050096

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@article{62eebb35d08d43fc80c33c5dd09452d2,

title = "J/ψ and ψ′ production in hadronic Z0 decays",

abstract = "The production of J/ψ mesons in Z0 decays is studied using 3.6 million hadronic events recorded by the OPAL detector at LEP. The inclusive Z0 to J/ψ and b-quark to J/ψ branching ratios are measured from the total yield of J/ψ mesons, identified from their decays into lepton pairs. The J/ψ momentum distribution is used to study the fragmentation of b-quarks. The production rate of ψ′ mesons, identified from their decays into a J/ψ and a π+π- pair, is measured as well. The following results are obtained: Br(Z0→J/ψ X) = (3.9 ± 0.2 ± 0.3) · 10-3 and Br(Z0→ψ′ X) = (1.6 ± 0.3 ± 0.2) · 10-3, where the first error is statistical and the second systematic. Finally the J/ψ sample is used to reconstruct exclusive b-hadron decays and calculate the corresponding b-hadron branching ratios and masses.",

author = "{OPAL Collaboration} and G. Alexander and J. Allison and N. Altekamp and K. Ametewee and Anderson, {K. J.} and S. Anderson and S. Arcelli and S. Asai and D. Axen and G. Azuelos and Ball, {A. H.} and E. Barberio and Barlow, {R. J.} and R. Bartoldus and Batley, {J. R.} and G. Beaudoin and J. Bechtluft and Beck, {G. A.} and C. Beeston and T. Behnke and Bell, {A. N.} and Bell, {K. W.} and G. Bella and S. Bentvelsen and P. Berlich and S. Bethke and O. Biebel and Bloodworth, {I. J.} and Bloomer, {J. E.} and P. Bock and Bosch, {H. M.} and M. Boutemeur and Bouwens, {B. T.} and S. Braibant and P. Bright-Thomas and Brown, {R. M.} and Burckhart, {H. J.} and C. Burgard and R. B{\"u}rgin and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and C. Charlesworth and Charlton, {D. G.} and D. Chrisman and Chu, {S. L.} and Clarke, {P. E.L.} and R. Folman",

year = "1996",

month = apr,

day = "1",

doi = "10.1007/s002880050096",

language = "English",

volume = "70",

pages = "197--209",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "2",

}

TY - JOUR

T1 - J/ψ and ψ′ production in hadronic Z0 decays

AU - OPAL Collaboration

AU - Alexander, G.

AU - Allison, J.

AU - Altekamp, N.

AU - Ametewee, K.

AU - Anderson, K. J.

AU - Anderson, S.

AU - Arcelli, S.

AU - Asai, S.

AU - Axen, D.

AU - Azuelos, G.

AU - Ball, A. H.

AU - Barberio, E.

AU - Barlow, R. J.

AU - Bartoldus, R.

AU - Batley, J. R.

AU - Beaudoin, G.

AU - Bechtluft, J.

AU - Beck, G. A.

AU - Beeston, C.

AU - Behnke, T.

AU - Bell, A. N.

AU - Bell, K. W.

AU - Bella, G.

AU - Bentvelsen, S.

AU - Berlich, P.

AU - Bethke, S.

AU - Biebel, O.

AU - Bloodworth, I. J.

AU - Bloomer, J. E.

AU - Bock, P.

AU - Bosch, H. M.

AU - Boutemeur, M.

AU - Bouwens, B. T.

AU - Braibant, S.

AU - Bright-Thomas, P.

AU - Brown, R. M.

AU - Burckhart, H. J.

AU - Burgard, C.

AU - Bürgin, R.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlesworth, C.

AU - Charlton, D. G.

AU - Chrisman, D.

AU - Chu, S. L.

AU - Clarke, P. E.L.

AU - Folman, R.

PY - 1996/4/1

Y1 - 1996/4/1

N2 - The production of J/ψ mesons in Z0 decays is studied using 3.6 million hadronic events recorded by the OPAL detector at LEP. The inclusive Z0 to J/ψ and b-quark to J/ψ branching ratios are measured from the total yield of J/ψ mesons, identified from their decays into lepton pairs. The J/ψ momentum distribution is used to study the fragmentation of b-quarks. The production rate of ψ′ mesons, identified from their decays into a J/ψ and a π+π- pair, is measured as well. The following results are obtained: Br(Z0→J/ψ X) = (3.9 ± 0.2 ± 0.3) · 10-3 and Br(Z0→ψ′ X) = (1.6 ± 0.3 ± 0.2) · 10-3, where the first error is statistical and the second systematic. Finally the J/ψ sample is used to reconstruct exclusive b-hadron decays and calculate the corresponding b-hadron branching ratios and masses.

AB - The production of J/ψ mesons in Z0 decays is studied using 3.6 million hadronic events recorded by the OPAL detector at LEP. The inclusive Z0 to J/ψ and b-quark to J/ψ branching ratios are measured from the total yield of J/ψ mesons, identified from their decays into lepton pairs. The J/ψ momentum distribution is used to study the fragmentation of b-quarks. The production rate of ψ′ mesons, identified from their decays into a J/ψ and a π+π- pair, is measured as well. The following results are obtained: Br(Z0→J/ψ X) = (3.9 ± 0.2 ± 0.3) · 10-3 and Br(Z0→ψ′ X) = (1.6 ± 0.3 ± 0.2) · 10-3, where the first error is statistical and the second systematic. Finally the J/ψ sample is used to reconstruct exclusive b-hadron decays and calculate the corresponding b-hadron branching ratios and masses.

UR - http://www.scopus.com/inward/record.url?scp=0001526677&partnerID=8YFLogxK

U2 - 10.1007/s002880050096

DO - 10.1007/s002880050096

M3 - Article

AN - SCOPUS:0001526677

VL - 70

SP - 197

EP - 209

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 2

ER -

J/ψ and ψ′ production in hadronic Z⁰ decays

Abstract

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