Measurement of the inclusive J/ψ production cross sections in pp and pp collisions at √s = 24.3 GeV

C. Morel; A. Bernasconi; R. E. Breedon; L. Camilleri; R. L. Cool; P. T. Cox; P. Cushman; L. Dick; E. C. Dukes; B. Gabioud; F. Gaille; P. Giacomelli; J. B. Jeanneret; C. Joseph; W. Kubischta; J. F. Loude; E. Malamud; O. E. Overseth; J. L. Pages; J. P. Perroud; D. Rüegger; R. W. Rusack; G. R. Snow; G. Sozzi; D. Steiner; M. T. Tran; A. Vacchi; G. Valenti

doi:10.1016/0370-2693(90)90579-U

Measurement of the inclusive J/ψ production cross sections in pp and pp collisions at √s = 24.3 GeV

C. Morel, A. Bernasconi, R. E. Breedon, L. Camilleri, R. L. Cool, P. T. Cox, P. Cushman, L. Dick, E. C. Dukes, B. Gabioud, F. Gaille, P. Giacomelli, J. B. Jeanneret, C. Joseph, W. Kubischta, J. F. Loude, E. Malamud, O. E. Overseth, J. L. Pages, J. P. PerroudD. Rüegger, R. W. Rusack, G. R. Snow, G. Sozzi, D. Steiner, M. T. Tran, A. Vacchi, G. Valenti

Physics and Astronomy (Twin Cities)

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Abstract

The inclusive cross section times branching ratio for J/ψ→e⁺e^- has been measured in the forward region in the UA6 experiment for pp and pp collisions at √s = 24.3 GeV. The ratio of the pp to pp cross sections is found to be 0.76 ± 0.14 ± 0.06. This demonstrates that gluon-gluon fusion dominates over quark-antiquark annihilation in the formation of the cc state.

Original language	English (US)
Pages (from-to)	505-510
Number of pages	6
Journal	Physics Letters B
Volume	252
Issue number	3
DOIs	https://doi.org/10.1016/0370-2693(90)90579-U
State	Published - Dec 20 1990

Bibliographical note

Funding Information:
We are indebtedto J.P. Guillet for his help with the theoreticailn terpretatioonf our data. We wish to thank the CERN PS and SPS Divisionsf or the efficient operationo f the antiprotonso urcea ndthe SPS Collider.W e also thankt heEP and SPS Divisionsf or their extensives upportd uringboth the installation and the runnings tageso f UA6. Finally, we gratefully acknowledgteh ed edicatedsu pporto f the UA6 technical and secretariaslt aff.This work is partiallys up- portedb y the Swiss NationalS cienceF oundationt,h e US National Science Foundationa nd US Department of Energy.

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Morel, C., Bernasconi, A., Breedon, R. E., Camilleri, L., Cool, R. L., Cox, P. T., Cushman, P., Dick, L., Dukes, E. C., Gabioud, B., Gaille, F., Giacomelli, P., Jeanneret, J. B., Joseph, C., Kubischta, W., Loude, J. F., Malamud, E., Overseth, O. E., Pages, J. L., ... Valenti, G. (1990). Measurement of the inclusive J/ψ production cross sections in pp and pp collisions at √s = 24.3 GeV. Physics Letters B, 252(3), 505-510. https://doi.org/10.1016/0370-2693(90)90579-U

Morel, C, Bernasconi, A, Breedon, RE, Camilleri, L, Cool, RL, Cox, PT, Cushman, P, Dick, L, Dukes, EC, Gabioud, B, Gaille, F, Giacomelli, P, Jeanneret, JB, Joseph, C, Kubischta, W, Loude, JF, Malamud, E, Overseth, OE, Pages, JL, Perroud, JP, Rüegger, D, Rusack, RW, Snow, GR, Sozzi, G, Steiner, D, Tran, MT, Vacchi, A & Valenti, G 1990, 'Measurement of the inclusive J/ψ production cross sections in pp and pp collisions at √s = 24.3 GeV', Physics Letters B, vol. 252, no. 3, pp. 505-510. https://doi.org/10.1016/0370-2693(90)90579-U

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title = "Measurement of the inclusive J/ψ production cross sections in pp and pp collisions at √s = 24.3 GeV",

abstract = "The inclusive cross section times branching ratio for J/ψ→e+e- has been measured in the forward region in the UA6 experiment for pp and pp collisions at √s = 24.3 GeV. The ratio of the pp to pp cross sections is found to be 0.76 ± 0.14 ± 0.06. This demonstrates that gluon-gluon fusion dominates over quark-antiquark annihilation in the formation of the cc state.",

author = "C. Morel and A. Bernasconi and Breedon, {R. E.} and L. Camilleri and Cool, {R. L.} and Cox, {P. T.} and P. Cushman and L. Dick and Dukes, {E. C.} and B. Gabioud and F. Gaille and P. Giacomelli and Jeanneret, {J. B.} and C. Joseph and W. Kubischta and Loude, {J. F.} and E. Malamud and Overseth, {O. E.} and Pages, {J. L.} and Perroud, {J. P.} and D. R{\"u}egger and Rusack, {R. W.} and Snow, {G. R.} and G. Sozzi and D. Steiner and Tran, {M. T.} and A. Vacchi and G. Valenti",

note = "Funding Information: We are indebtedto J.P. Guillet for his help with the theoreticailn terpretatioonf our data. We wish to thank the CERN PS and SPS Divisionsf or the efficient operationo f the antiprotonso urcea ndthe SPS Collider.W e also thankt heEP and SPS Divisionsf or their extensives upportd uringboth the installation and the runnings tageso f UA6. Finally, we gratefully acknowledgteh ed edicatedsu pporto f the UA6 technical and secretariaslt aff.This work is partiallys up- portedb y the Swiss NationalS cienceF oundationt,h e US National Science Foundationa nd US Department of Energy.",

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AU - Morel, C.

AU - Bernasconi, A.

AU - Breedon, R. E.

AU - Camilleri, L.

AU - Cool, R. L.

AU - Cox, P. T.

AU - Cushman, P.

AU - Dick, L.

AU - Dukes, E. C.

AU - Gabioud, B.

AU - Gaille, F.

AU - Giacomelli, P.

AU - Jeanneret, J. B.

AU - Joseph, C.

AU - Kubischta, W.

AU - Loude, J. F.

AU - Malamud, E.

AU - Overseth, O. E.

AU - Pages, J. L.

AU - Perroud, J. P.

AU - Rüegger, D.

AU - Rusack, R. W.

AU - Snow, G. R.

AU - Sozzi, G.

AU - Steiner, D.

AU - Tran, M. T.

AU - Vacchi, A.

AU - Valenti, G.

N1 - Funding Information: We are indebtedto J.P. Guillet for his help with the theoreticailn terpretatioonf our data. We wish to thank the CERN PS and SPS Divisionsf or the efficient operationo f the antiprotonso urcea ndthe SPS Collider.W e also thankt heEP and SPS Divisionsf or their extensives upportd uringboth the installation and the runnings tageso f UA6. Finally, we gratefully acknowledgteh ed edicatedsu pporto f the UA6 technical and secretariaslt aff.This work is partiallys up- portedb y the Swiss NationalS cienceF oundationt,h e US National Science Foundationa nd US Department of Energy.

PY - 1990/12/20

Y1 - 1990/12/20

N2 - The inclusive cross section times branching ratio for J/ψ→e+e- has been measured in the forward region in the UA6 experiment for pp and pp collisions at √s = 24.3 GeV. The ratio of the pp to pp cross sections is found to be 0.76 ± 0.14 ± 0.06. This demonstrates that gluon-gluon fusion dominates over quark-antiquark annihilation in the formation of the cc state.

AB - The inclusive cross section times branching ratio for J/ψ→e+e- has been measured in the forward region in the UA6 experiment for pp and pp collisions at √s = 24.3 GeV. The ratio of the pp to pp cross sections is found to be 0.76 ± 0.14 ± 0.06. This demonstrates that gluon-gluon fusion dominates over quark-antiquark annihilation in the formation of the cc state.

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Measurement of the inclusive J/ψ production cross sections in pp and pp collisions at √s = 24.3 GeV

Abstract

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