pp{yields}J/{psi}+{Upsilon}+X as a clean probe to the quarkonium production mechanism

Journal Article · Tue Mar 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.054015· OSTI ID:21578191

Ko, P; Yu, Chaehyun; Lee, Jungil ^[1]

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1. School of Physics, KIAS, Seoul 130-722 (Korea, Republic of)

We report that, unlike most inclusive quarkonium-production processes, the production rate for pp{yields}J/{psi}+{Upsilon}+X dominantly depends on two not well-known long-distance nonrelativistic QCD matrix elements, <O{sub 8}{sup J}/{psi}(3S{sub 1})> and <O{sub 8}{sup {Upsilon}}(3S{sub 1})> at leading order in the strong coupling constant, which account for the transition probabilities of the color-octet spin-triplet heavy-quark-antiquark pairs cc{sub 8}({sup 3}S{sub 1}){yields}J/{psi} and bb{sub 8}({sup 3}S{sub 1}){yields}{Upsilon}, respectively. With the integrated luminosity {approx}100 fb{sup -1} at the center-of-momentum energy {radical}(s)=14 TeV we expect that approximately 1900 pp{yields}J/{psi}+{Upsilon}+X events can be observed at the CERN Large Hadron Collider by tagging muon pairs, which are enough to probe to the color-octet mechanism. The forthcoming measurement may provide a useful constraint to resolve the decade-old puzzle for the polarization of prompt J/{psi} at the Fermilab Tevatron. If corresponding measured rate is significantly less than the prediction, it may imply that the current values for the color-octet matrix elements are overestimated.

• OSTI ID: 21578191
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevD.83.054015; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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