QCD radiative corrections to X<subscript>cj</subscript> production at hadron colliders.
In: Physical Review D: Particles, Fields, Gravitation & Cosmology, Jg. 83 (2011-06-03), Heft 11, S. 111503.1- (5S.)
serialPeriodical
Zugriff:
To clarify the outstanding problem in charmonium production that existing theories cannot explain the observed cross sections of χcJ(J=0,1,2) and ratio Rχc=σ c2/σ c1≈0.75 (in contrast to the spin counting value 5/3) at the Tevatron, we study the complete next-to-leading order radiative corrections in nonrelativistic QCD, and find next-to-leading order contributions of 3PJ[1] are more important than leading order at high pT, and 3P1[1] decreases slower than 3P2[1], implying a natural explanation for the Rχc puzzle. By fitting Rχc, the predicted cross sections of χcJ are found to agree with data. The result indicates color-octet contribution is crucially needed, thus providing a unique test for heavy quarkonium production mechanisms. Feed-down contributions of χcJ to prompt J/ψ production are estimated to be substantial, about 30%-40% at pT=20??GeV. Production of χcJ(J=0,1,2) at the LHC is also predicted. [ABSTRACT FROM AUTHOR]
Titel: |
QCD radiative corrections to X<subscript>cj</subscript> production at hadron colliders.
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Autor/in / Beteiligte Person: | Ma, Yan-Qing ; Wang, Kai ; Chao, Kuang-Ta |
Zeitschrift: | Physical Review D: Particles, Fields, Gravitation & Cosmology, Jg. 83 (2011-06-03), Heft 11, S. 111503.1- (5S.) |
Veröffentlichung: | 2011 |
Medientyp: | serialPeriodical |
ISSN: | 2470-0010 (print) |
DOI: | 10,1103/PhysRevD.83.111503 |
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