Factorized power expansion for high-pT heavy quarkonium production

Ma, Yan -Qing; Qiu, Jian -Wei; Sterman, George; Zhang, Hong

doi:10.1103/PhysRevLett.113.142002

Factorized power expansion for high- $p_{T}$ heavy quarkonium production

Journal Article · Thu Oct 02 00:00:00 EDT 2014 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.113.142002· OSTI ID:1176990

Ma, Yan -Qing ^[1]; Qiu, Jian -Wei ^[2]; Sterman, George ^[3]; Zhang, Hong ^[3]

Brookhaven National Lab. (BNL), Upton, NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States)
Stony Brook Univ., Stony Brook, NY (United States)

In this study, we show that when the factorized cross section for heavy quarkonium production includes next-to-leading power contributions associated with the production of the heavy quark pair at short distances, it naturally reproduces all high p_T results calculated in nonrelativistic QCD (NRQCD) factorization. This extended formalism requires fragmentation functions for heavy quark pairs, as well as for light partons. When these fragmentation functions are themselves calculated using NRQCD, we find that two of the four leading NRQCD production channels, ³S^[1]₁ and ¹S^[8]₀, are dominated by the next-to-leading power contributions for a very wide p_T range. The large next-to-leading order corrections of NRQCD are absorbed into the leading order of the first power correction. The impact of this finding on heavy quarkonium production and its polarization is discussed.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: AC02-05CH11231; AC02-98CH10886

OSTI ID:: 1176990

Alternate ID(s):: OSTI ID: 1180901

Report Number(s):: BNL--107323-2015-JA

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 113; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Impact of η c Hadroproduction Data on Charmonium Production and Polarization within the Nonrelativistic QCD Framework Zhang, Hong-Fei; Sun, Zhan; Sang, Wen-Long Physical Review Letters, Vol. 114, Issue 9 https://doi.org/10.1103/physrevlett.114.092006	journal	March 2015
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Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions Andronic, A.; Arleo, F.; Arnaldi, R. arXiv https://doi.org/10.48550/arxiv.1506.03981	text	January 2015

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