Measurement of Υ production for p+p and p+d interactions at 800GeV/c

L. Y. Zhu; P. E. Reimer; B. A. Mueller; T. C. Awes; M. L. Brooks; C. N. Brown; J. D. Bush; T. A. Carey; T. H. Chang; W. E. Cooper; C. A. Gagliardi; G. T. Garvey; D. F. Geesaman; E. A. Hawker; X. C. He; D. E. Howell; L. D. Isenhower; D. M. Kaplan; S. B. Kaufman; S. A. Klinksiek; D. D. Koetke; D. M. Lee; W. M. Lee; M. J. Leitch; N. Makins; P. L. McGaughey; J. M. Moss; P. M. Nord; V. Papavassiliou; B. K. Park; G. Petitt; J. C. Peng; M. E. Sadler; W. E. Sondheim; P. W. Stankus; T. N. Thompson; R. S. Towell; R. E. Tribble; M. A. Vasiliev; J. C. Webb; J. L. Willis; P. Winter; D. K. Wise; Y. Yin; G. R. Young

doi:10.1103/PhysRevLett.100.062301

Measurement of Υ production for p+p and p+d interactions at 800GeV/c

L. Y. Zhu, P. E. Reimer, B. A. Mueller, T. C. Awes, M. L. Brooks, C. N. Brown, J. D. Bush, T. A. Carey, T. H. Chang, W. E. Cooper, C. A. Gagliardi, G. T. Garvey, D. F. Geesaman, E. A. Hawker, X. C. He, D. E. Howell, L. D. Isenhower, D. M. Kaplan, S. B. Kaufman, S. A. KlinksiekD. D. Koetke, D. M. Lee, W. M. Lee, M. J. Leitch, N. Makins, P. L. McGaughey, J. M. Moss, P. M. Nord, V. Papavassiliou, B. K. Park, G. Petitt, J. C. Peng, M. E. Sadler, W. E. Sondheim, P. W. Stankus, T. N. Thompson, R. S. Towell, R. E. Tribble, M. A. Vasiliev, J. C. Webb, J. L. Willis, P. Winter, D. K. Wise, Y. Yin, G. R. Young

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Abstract

We report a high statistics measurement of Υ production with an 800GeV/c proton beam on hydrogen and deuterium targets. The dominance of the gluon-gluon fusion process for Υ production at this energy implies that the cross section ratio, σ(p+d→Υ)/2σ(p+p→Υ), is sensitive to the gluon content in the neutron relative to that in the proton. Over the kinematic region 0<xF<0.6, this ratio is found to be consistent with unity, in striking contrast to the behavior of the Drell-Yan cross section ratio σ(p+d)DY/2σ(p+p)DY. This result shows that the gluon distributions in the proton and neutron are very similar. The Υ production cross sections are also compared with the p+d and p+Cu cross sections from earlier measurements.

Original language	English (US)
Article number	062301
Journal	Physical review letters
Volume	100
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.100.062301
State	Published - Feb 14 2008

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Physics and Astronomy(all)

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Zhu, L. Y., Reimer, P. E., Mueller, B. A., Awes, T. C., Brooks, M. L., Brown, C. N., Bush, J. D., Carey, T. A., Chang, T. H., Cooper, W. E., Gagliardi, C. A., Garvey, G. T., Geesaman, D. F., Hawker, E. A., He, X. C., Howell, D. E., Isenhower, L. D., Kaplan, D. M., Kaufman, S. B., ... Young, G. R. (2008). Measurement of Υ production for p+p and p+d interactions at 800GeV/c. Physical review letters, 100(6), [062301]. https://doi.org/10.1103/PhysRevLett.100.062301

Zhu, LY, Reimer, PE, Mueller, BA, Awes, TC, Brooks, ML, Brown, CN, Bush, JD, Carey, TA, Chang, TH, Cooper, WE, Gagliardi, CA, Garvey, GT, Geesaman, DF, Hawker, EA, He, XC, Howell, DE, Isenhower, LD, Kaplan, DM, Kaufman, SB, Klinksiek, SA, Koetke, DD, Lee, DM, Lee, WM, Leitch, MJ, Makins, N, McGaughey, PL, Moss, JM, Nord, PM, Papavassiliou, V, Park, BK, Petitt, G, Peng, JC, Sadler, ME, Sondheim, WE, Stankus, PW, Thompson, TN, Towell, RS, Tribble, RE, Vasiliev, MA, Webb, JC, Willis, JL, Winter, P, Wise, DK, Yin, Y & Young, GR 2008, 'Measurement of Υ production for p+p and p+d interactions at 800GeV/c', Physical review letters, vol. 100, no. 6, 062301. https://doi.org/10.1103/PhysRevLett.100.062301

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abstract = "We report a high statistics measurement of Υ production with an 800GeV/c proton beam on hydrogen and deuterium targets. The dominance of the gluon-gluon fusion process for Υ production at this energy implies that the cross section ratio, σ(p+d→Υ)/2σ(p+p→Υ), is sensitive to the gluon content in the neutron relative to that in the proton. Over the kinematic region 0",

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AU - Zhu, L. Y.

AU - Reimer, P. E.

AU - Mueller, B. A.

AU - Awes, T. C.

AU - Brooks, M. L.

AU - Brown, C. N.

AU - Bush, J. D.

AU - Carey, T. A.

AU - Chang, T. H.

AU - Cooper, W. E.

AU - Gagliardi, C. A.

AU - Garvey, G. T.

AU - Geesaman, D. F.

AU - Hawker, E. A.

AU - He, X. C.

AU - Howell, D. E.

AU - Isenhower, L. D.

AU - Kaplan, D. M.

AU - Kaufman, S. B.

AU - Klinksiek, S. A.

AU - Koetke, D. D.

AU - Lee, D. M.

AU - Lee, W. M.

AU - Leitch, M. J.

AU - Makins, N.

AU - McGaughey, P. L.

AU - Moss, J. M.

AU - Nord, P. M.

AU - Papavassiliou, V.

AU - Park, B. K.

AU - Petitt, G.

AU - Peng, J. C.

AU - Sadler, M. E.

AU - Sondheim, W. E.

AU - Stankus, P. W.

AU - Thompson, T. N.

AU - Towell, R. S.

AU - Tribble, R. E.

AU - Vasiliev, M. A.

AU - Webb, J. C.

AU - Willis, J. L.

AU - Winter, P.

AU - Wise, D. K.

AU - Yin, Y.

AU - Young, G. R.

PY - 2008/2/14

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Measurement of Υ production for p+p and p+d interactions at 800GeV/c

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