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

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

We report a high statistics measurement of Upsilon production with an 800 GeV/c proton beam on hydrogen and deuterium targets. The dominance of the gluon-gluon fusion process for Upsilon production at this energy implies that the cross section ratio, sigma(p+d-->Upsilon)/2sigma(p+p-->Upsilon),...

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Veröffentlicht in:Physical review letters 2008-02, Vol.100 (6), p.062301-062301, Article 062301
Hauptverfasser: 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, Klinksiek, S A, Koetke, D D, Lee, D M, Lee, W M, Leitch, M J, Makins, N, McGaughey, P L, Moss, J M, Nord, P M, Papavassiliou, V, Park, B K, Petitt, G, Peng, J C, Sadler, M E, Sondheim, W E, Stankus, P W, Thompson, T N, Towell, R S, Tribble, R E, Vasiliev, M A, Webb, J C, Willis, J L, Winter, P, Wise, D K, Yin, Y, Young, G R
Format: Artikel
Sprache:eng
Schlagworte:
08 HYDROGEN
CROSS SECTIONS
DEUTERIUM TARGET
GLUONS
HYDROGEN
NEUTRONS
PRODUCTION
PROTON BEAMS
PROTONS
STATISTICS
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Zusammenfassung:We report a high statistics measurement of Upsilon production with an 800 GeV/c proton beam on hydrogen and deuterium targets. The dominance of the gluon-gluon fusion process for Upsilon production at this energy implies that the cross section ratio, sigma(p+d-->Upsilon)/2sigma(p+p-->Upsilon), is sensitive to the gluon content in the neutron relative to that in the proton. Over the kinematic region 0
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.100.062301