Abstract
Based on the nonrelativistic QCD (NRQCD) factorization formalism, we investigate inclusive productions of two spin-triplet S-wave quarkonia pp → 2J/ψ + X, 2γ + X, and J/ψ + γ + X at the CERN Large Hadron Collider. The total production rates integrated over the rapidity (y) and transverse-momentum (pT) ranges |y| < 2.4 and pt < 50 GeV are predicted to be σ[pp → 2J/ψ + X] =22 (35) nb, σ[pp → 2γ + X] = 24 (49) pb, and σ[pp → J/ψ + γ + X] =7 (13) pb at the center-of-momentum energy √s = 7 (14) TeV. In order to provide predictions that can be useful in both small-and large-pT regions, we do not employ the fragmentation approximation and we include the spin-triplet S-wave color-singlet and color-octet channels for each quarkonium final state at leading order in the strong coupling. The pT distributions of pp → 2 J/ψ + X and 2γ + X in the low-pt region are dominated by the color-singlet contributions. At leading order in the strong coupling, the color-singlet channel is absent for pp → J/ψ + γ + X. Therefore, the process pp → J/ψ + γ + X may provide a useful probe to the color-octet mechanism of NRQCD.
| Original language | English |
|---|---|
| Article number | 070 |
| Journal | Journal of High Energy Physics |
| Volume | 2011 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2011 Sep 29 |
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Keywords
- Hadronic Colliders
- QCD
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
Inclusive double-quarkonium production at the Large Hadron Collider. / Ko, P.; Lee, Jungil; Yu, Chaehyun.
In: Journal of High Energy Physics, Vol. 2011, No. 1, 070, 29.09.2011.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Inclusive double-quarkonium production at the Large Hadron Collider
AU - Ko, P.
AU - Lee, Jungil
AU - Yu, Chaehyun
PY - 2011/9/29
Y1 - 2011/9/29
N2 - Based on the nonrelativistic QCD (NRQCD) factorization formalism, we investigate inclusive productions of two spin-triplet S-wave quarkonia pp → 2J/ψ + X, 2γ + X, and J/ψ + γ + X at the CERN Large Hadron Collider. The total production rates integrated over the rapidity (y) and transverse-momentum (pT) ranges |y| < 2.4 and pt < 50 GeV are predicted to be σ[pp → 2J/ψ + X] =22 (35) nb, σ[pp → 2γ + X] = 24 (49) pb, and σ[pp → J/ψ + γ + X] =7 (13) pb at the center-of-momentum energy √s = 7 (14) TeV. In order to provide predictions that can be useful in both small-and large-pT regions, we do not employ the fragmentation approximation and we include the spin-triplet S-wave color-singlet and color-octet channels for each quarkonium final state at leading order in the strong coupling. The pT distributions of pp → 2 J/ψ + X and 2γ + X in the low-pt region are dominated by the color-singlet contributions. At leading order in the strong coupling, the color-singlet channel is absent for pp → J/ψ + γ + X. Therefore, the process pp → J/ψ + γ + X may provide a useful probe to the color-octet mechanism of NRQCD.
AB - Based on the nonrelativistic QCD (NRQCD) factorization formalism, we investigate inclusive productions of two spin-triplet S-wave quarkonia pp → 2J/ψ + X, 2γ + X, and J/ψ + γ + X at the CERN Large Hadron Collider. The total production rates integrated over the rapidity (y) and transverse-momentum (pT) ranges |y| < 2.4 and pt < 50 GeV are predicted to be σ[pp → 2J/ψ + X] =22 (35) nb, σ[pp → 2γ + X] = 24 (49) pb, and σ[pp → J/ψ + γ + X] =7 (13) pb at the center-of-momentum energy √s = 7 (14) TeV. In order to provide predictions that can be useful in both small-and large-pT regions, we do not employ the fragmentation approximation and we include the spin-triplet S-wave color-singlet and color-octet channels for each quarkonium final state at leading order in the strong coupling. The pT distributions of pp → 2 J/ψ + X and 2γ + X in the low-pt region are dominated by the color-singlet contributions. At leading order in the strong coupling, the color-singlet channel is absent for pp → J/ψ + γ + X. Therefore, the process pp → J/ψ + γ + X may provide a useful probe to the color-octet mechanism of NRQCD.
KW - Hadronic Colliders
KW - QCD
UR - http://www.scopus.com/inward/record.url?scp=80053166384&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053166384&partnerID=8YFLogxK
U2 - 10.1007/JHEP01(2011)070
DO - 10.1007/JHEP01(2011)070
M3 - Article
AN - SCOPUS:80053166384
VL - 2011
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1126-6708
IS - 1
M1 - 070
ER -