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p p -> J/psi+Upsilon+X as a clean probe to the quarkonium production mechanism
High Energy Physics - Phenomenology · Submitted 19 Jun 2010
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We report that, unlike most inclusive quarkonium-production processes, the production rate for p p -> J/psi+Upsilon+X dominantly depends on two not well-known long-distance nonrelativistic QCD matrix elements, <O_8^{J/psi}(^3S_1)> and <O_8^{Upsilon}(^3S_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 c\bar{c}_8(^3S_1) -> J/psi and b\bar{b}_8(^3S_1) -> Upsilon, respectively.
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The abstract, sentence by sentence
We report that, unlike most inclusive quarkonium-production processes, the production rate for p p -> J/psi+Upsilon+X dominantly depends on two not well-known long-distance nonrelativistic QCD matrix elements, <O_8^{J/psi}(^3S_1)> and <O_8^{Upsilon}(^3S_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 c\bar{c}_8(^3S_1) -> J/psi and b\bar{b}_8(^3S_1) -> Upsilon, respectively. With the integrated luminosity ~ 100 fb^{-1} at the center-of-momentum energy sqrt{s}=14 TeV we expect that approximately 1900 p p -> 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.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We report that, unlike most inclusive quarkonium-production processes, the production rate for p p -> J/psi+Upsilon+X dominantly depends on two not well-known long-distance nonrelativistic QCD matrix elements, <O_8^{J/psi}(^3S_1)> and <O_8^{Upsilon}(^3S_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 c\bar{c}_8(^3S_1) -> J/psi and b\bar{b}_8(^3S_1) -> Upsilon, respectively. | result 0.88 | 0.79 | 0.79 | asserted 1.00 |
| s1 | With the integrated luminosity ~ 100 fb^{-1} at the center-of-momentum energy sqrt{s}=14 TeV we expect that approximately 1900 p p -> 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. | result 0.57 | 0.51 | 0.15 | hedged possibility 0.54 |
| s2 | 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. | interpretation 0.68 | 0.06 | 0.09 | hedged possibility 1.00 |
| s3 | 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. | interpretation 0.99 | 0.06 | 0.07 | hedged possibility 1.00 |
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The paper
Original abstract
We report that, unlike most inclusive quarkonium-production processes, the production rate for p p -> J/psi+Upsilon+X dominantly depends on two not well-known long-distance nonrelativistic QCD matrix elements, <O_8^{J/psi}(^3S_1)> and <O_8^{Upsilon}(^3S_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 c\bar{c}_8(^3S_1) -> J/psi and b\bar{b}_8(^3S_1) -> Upsilon, respectively. With the integrated luminosity ~ 100 fb^{-1} at the center-of-momentum energy sqrt{s}=14 TeV we expect that approximately 1900 p p -> 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.
Human review
How the literature uses it
1 arXiv paper cite this in 2 sentences
Papers citing it · 1 sentence without a confident label
Cites it as background 1 paper
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In Ref. [ref] , the production of $J/ψ$ pair was discussed in NRQCD.
Relativistic Correction to J/psi and Upsilon Pair Production · $J/ψ$($Υ$) pair production · 0.89
What it cites · 36 sentences without a confident label
Uses data or values from 5 papers
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In this work, we use $⟨O_8^J/ψ (^3S_1) ⟩= 3.9×10^-3$ $GeV^3$ [ref] , $⟨O_8^Υ (^3S_1) ⟩= 1.5×10^-1$ $GeV^3$ [ref] .
Polarization of Prompt J/psi at the Tevatron · Introduction · 1.00
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In this work, we use $⟨O_8^J/ψ (^3S_1) ⟩= 3.9×10^-3$ $GeV^3$ [ref] , $⟨O_8^Υ (^3S_1) ⟩= 1.5×10^-1$ $GeV^3$ [ref] .
Quarkonium Production at High-Energy Colliders · Introduction · 1.00
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We quote $⟨O_1^J/ψ(^3S_1) ⟩= 1.32 GeV^3$ [ref] and $⟨O_1^Υ(^3S_1)⟩=9.21 GeV^3$ [ref] .
Potential-model calculation of an order-v^2 NRQCD matrix element · Introduction · 1.00
Cites as background 3 papers
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As an effective field theory of QCD, the nonrelativistic QCD (NRQCD) factorization approach [ref] has achieved great progress in understanding the production and decay mechanism of heavy quarkonia [ref] .
Heavy Quarkonium Physics · Introduction · 0.97
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As an effective field theory of QCD, the nonrelativistic QCD (NRQCD) factorization approach [ref] has achieved great progress in understanding the production and decay mechanism of heavy quarkonia [ref] .
Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium · Introduction · 0.97
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Various determinations of these matrix elements can be found, for example, in Ref. [ref] .
Quarkonium Production at High-Energy Colliders · Introduction · 0.86
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