J/ψ and ψ′ production at the CERN p̄p collider

C. Albajar; M. G. Albrow; O. C. Allkofer; K. Ankoviak; R. Apsimon; B. Aubert; C. Bacci; S. Bartha; G. Bauer; A. Bettini; A. Bezaguet; P. Biddulph; H. Bohn; A. Böhrer; R. Bonino; K. Bos; M. Botlo; D. Brockhausen; C. Buchanan; B. Buschbeck; G. Busetto; A. Caner; P. Casoli; H. Castilla-Valdez; F. Cavanna; P. Cennini; S. Centro; F. Ceradini; G. Ciapetti; S. Cittolin; E. Clayton; D. Cline; J. Colas; R. Conte; J. A. Coughlan; D. Dau; D. Daum; M. Della Negra; M. Demoulin; D. Denegri; H. Dibon; A. DiCiaccio; F. J. Diez Hedo; L. Dobrzynzki; J. Dorenbosch; J. D. Dowell; D. Drijard; K. Eggert; E. Eisenhandler; N. Ellis

doi:10.1016/0370-2693(91)90227-H

J/ψ and ψ′ production at the CERN p̄p collider

C. Albajar, M. G. Albrow, O. C. Allkofer, K. Ankoviak, R. Apsimon, B. Aubert, C. Bacci, S. Bartha, G. Bauer, A. Bettini, A. Bezaguet, P. Biddulph, H. Bohn, A. Böhrer, R. Bonino, K. Bos, M. Botlo, D. Brockhausen, C. Buchanan, B. BuschbeckG. Busetto, A. Caner, P. Casoli, H. Castilla-Valdez, F. Cavanna, P. Cennini, S. Centro, F. Ceradini, G. Ciapetti, S. Cittolin, E. Clayton, D. Cline, J. Colas, R. Conte, J. A. Coughlan, D. Dau, D. Daum, M. Della Negra, M. Demoulin, D. Denegri, H. Dibon, A. DiCiaccio, F. J. Diez Hedo, L. Dobrzynzki, J. Dorenbosch, J. D. Dowell, D. Drijard, K. Eggert, E. Eisenhandler, N. Ellis

Physics and Astronomy (Twin Cities)

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Abstract

We have measured the production cross-section times branching ratio for J/ψ→μ⁺μ^- in pp̄ interactions at √s = 630 GeV in the kinematic range |y|<2.0 and p_T>5 GeV/c, BR(J/ψ→μ⁺μ^-)σ(p p ̄→J/ψ)=6.18±0.24±0.81 nb. The data sample collected in 1988 and 1989 for an integrated luminosity of 4.7 pb^-1 represents a fivefold improvement over the statistics in our earlier study of the J/ψ production process, and the p_T distribution which is measured extends to 28 GeV/c. Using event topology we show that the rate for the direct production of J/ψ, via radiative decays of χ states, is larger than that for production via B-hadrons. Production of ψ′ is also studied using the decay modes <ψ′→μ⁺μ^- and ψ′→J/ψπ⁺ψ^-.

Original language	English (US)
Pages (from-to)	112-120
Number of pages	9
Journal	Physics Letters B
Volume	256
Issue number	1
DOIs	https://doi.org/10.1016/0370-2693(91)90227-H
State	Published - Feb 28 1991

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Albajar, C., Albrow, M. G., Allkofer, O. C., Ankoviak, K., Apsimon, R., Aubert, B., Bacci, C., Bartha, S., Bauer, G., Bettini, A., Bezaguet, A., Biddulph, P., Bohn, H., Böhrer, A., Bonino, R., Bos, K., Botlo, M., Brockhausen, D., Buchanan, C., ... Ellis, N. (1991). J/ψ and ψ′ production at the CERN p̄p collider. Physics Letters B, 256(1), 112-120. https://doi.org/10.1016/0370-2693(91)90227-H

Albajar, C, Albrow, MG, Allkofer, OC, Ankoviak, K, Apsimon, R, Aubert, B, Bacci, C, Bartha, S, Bauer, G, Bettini, A, Bezaguet, A, Biddulph, P, Bohn, H, Böhrer, A, Bonino, R, Bos, K, Botlo, M, Brockhausen, D, Buchanan, C, Buschbeck, B, Busetto, G, Caner, A, Casoli, P, Castilla-Valdez, H, Cavanna, F, Cennini, P, Centro, S, Ceradini, F, Ciapetti, G, Cittolin, S, Clayton, E, Cline, D, Colas, J, Conte, R, Coughlan, JA, Dau, D, Daum, D, Della Negra, M, Demoulin, M, Denegri, D, Dibon, H, DiCiaccio, A, Diez Hedo, FJ, Dobrzynzki, L, Dorenbosch, J, Dowell, JD, Drijard, D, Eggert, K, Eisenhandler, E & Ellis, N 1991, 'J/ψ and ψ′ production at the CERN p̄p collider', Physics Letters B, vol. 256, no. 1, pp. 112-120. https://doi.org/10.1016/0370-2693(91)90227-H

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title = "J/ψ and ψ′ production at the CERN {\=p}p collider",

abstract = "We have measured the production cross-section times branching ratio for J/ψ→μ+μ- in p{\=p} interactions at √s = 630 GeV in the kinematic range |y|<2.0 and pT>5 GeV/c, BR(J/ψ→μ+μ-)σ(p p{\= }→J/ψ)=6.18±0.24±0.81 nb. The data sample collected in 1988 and 1989 for an integrated luminosity of 4.7 pb-1 represents a fivefold improvement over the statistics in our earlier study of the J/ψ production process, and the pT distribution which is measured extends to 28 GeV/c. Using event topology we show that the rate for the direct production of J/ψ, via radiative decays of χ states, is larger than that for production via B-hadrons. Production of ψ′ is also studied using the decay modes <ψ′→μ+μ- and ψ′→J/ψπ+ψ-.",

author = "C. Albajar and Albrow, {M. G.} and Allkofer, {O. C.} and K. Ankoviak and R. Apsimon and B. Aubert and C. Bacci and S. Bartha and G. Bauer and A. Bettini and A. Bezaguet and P. Biddulph and H. Bohn and A. B{\"o}hrer and R. Bonino and K. Bos and M. Botlo and D. Brockhausen and C. Buchanan and B. Buschbeck and G. Busetto and A. Caner and P. Casoli and H. Castilla-Valdez and F. Cavanna and P. Cennini and S. Centro and F. Ceradini and G. Ciapetti and S. Cittolin and E. Clayton and D. Cline and J. Colas and R. Conte and Coughlan, {J. A.} and D. Dau and D. Daum and {Della Negra}, M. and M. Demoulin and D. Denegri and H. Dibon and A. DiCiaccio and {Diez Hedo}, {F. J.} and L. Dobrzynzki and J. Dorenbosch and Dowell, {J. D.} and D. Drijard and K. Eggert and E. Eisenhandler and N. Ellis",

year = "1991",

month = feb,

day = "28",

doi = "10.1016/0370-2693(91)90227-H",

language = "English (US)",

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pages = "112--120",

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T1 - J/ψ and ψ′ production at the CERN p̄p collider

AU - Albajar, C.

AU - Albrow, M. G.

AU - Allkofer, O. C.

AU - Ankoviak, K.

AU - Apsimon, R.

AU - Aubert, B.

AU - Bacci, C.

AU - Bartha, S.

AU - Bauer, G.

AU - Bettini, A.

AU - Bezaguet, A.

AU - Biddulph, P.

AU - Bohn, H.

AU - Böhrer, A.

AU - Bonino, R.

AU - Bos, K.

AU - Botlo, M.

AU - Brockhausen, D.

AU - Buchanan, C.

AU - Buschbeck, B.

AU - Busetto, G.

AU - Caner, A.

AU - Casoli, P.

AU - Castilla-Valdez, H.

AU - Cavanna, F.

AU - Cennini, P.

AU - Centro, S.

AU - Ceradini, F.

AU - Ciapetti, G.

AU - Cittolin, S.

AU - Clayton, E.

AU - Cline, D.

AU - Colas, J.

AU - Conte, R.

AU - Coughlan, J. A.

AU - Dau, D.

AU - Daum, D.

AU - Della Negra, M.

AU - Demoulin, M.

AU - Denegri, D.

AU - Dibon, H.

AU - DiCiaccio, A.

AU - Diez Hedo, F. J.

AU - Dobrzynzki, L.

AU - Dorenbosch, J.

AU - Dowell, J. D.

AU - Drijard, D.

AU - Eggert, K.

AU - Eisenhandler, E.

AU - Ellis, N.

PY - 1991/2/28

Y1 - 1991/2/28

N2 - We have measured the production cross-section times branching ratio for J/ψ→μ+μ- in pp̄ interactions at √s = 630 GeV in the kinematic range |y|<2.0 and pT>5 GeV/c, BR(J/ψ→μ+μ-)σ(p p ̄→J/ψ)=6.18±0.24±0.81 nb. The data sample collected in 1988 and 1989 for an integrated luminosity of 4.7 pb-1 represents a fivefold improvement over the statistics in our earlier study of the J/ψ production process, and the pT distribution which is measured extends to 28 GeV/c. Using event topology we show that the rate for the direct production of J/ψ, via radiative decays of χ states, is larger than that for production via B-hadrons. Production of ψ′ is also studied using the decay modes <ψ′→μ+μ- and ψ′→J/ψπ+ψ-.

AB - We have measured the production cross-section times branching ratio for J/ψ→μ+μ- in pp̄ interactions at √s = 630 GeV in the kinematic range |y|<2.0 and pT>5 GeV/c, BR(J/ψ→μ+μ-)σ(p p ̄→J/ψ)=6.18±0.24±0.81 nb. The data sample collected in 1988 and 1989 for an integrated luminosity of 4.7 pb-1 represents a fivefold improvement over the statistics in our earlier study of the J/ψ production process, and the pT distribution which is measured extends to 28 GeV/c. Using event topology we show that the rate for the direct production of J/ψ, via radiative decays of χ states, is larger than that for production via B-hadrons. Production of ψ′ is also studied using the decay modes <ψ′→μ+μ- and ψ′→J/ψπ+ψ-.

UR - http://www.scopus.com/inward/record.url?scp=0001763998&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001763998&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(91)90227-H

DO - 10.1016/0370-2693(91)90227-H

M3 - Article

AN - SCOPUS:0001763998

SN - 0370-2693

VL - 256

SP - 112

EP - 120

JO - Physics Letters B

JF - Physics Letters B

IS - 1

ER -

J/ψ and ψ′ production at the CERN p̄p collider

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