scholarly journals QCD Factorization for heavy quarkonium production at collider energies

2007 ◽  
Author(s):  
Jian-Wei Qiu
Keyword(s):  
Heavy Quarkonium ◽  
Qcd Factorization ◽  
Quarkonium Production

scholarly journals Excited heavy quarkonium production at the LHC throughWboson decays

2012 ◽  
Vol 86 (1) ◽  
Author(s):  
Qi-Li Liao ◽  
Xing-Gang Wu ◽  
Jun Jiang ◽  
Zhi Yang ◽  
Zhen-Yun Fang ◽  
...  
Keyword(s):  
Heavy Quarkonium ◽  
Quarkonium Production

scholarly journals Fragmentation, factorization and infrared poles in heavy quarkonium production

2005 ◽  
Vol 613 (1-2) ◽  
pp. 45-51 ◽  
Author(s):  
Gouranga C. Nayak ◽  
Jian-Wei Qiu ◽  
George Sterman
Keyword(s):  
Heavy Quarkonium ◽  
Quarkonium Production

scholarly journals DOUBLE PARTON FRAGMENTATION FUNCTION AND ITS EVOLUTION IN QUARKONIUM PRODUCTION

2014 ◽  
Vol 25 ◽  
pp. 1460040
Author(s):  
ZHONG-BO KANG
Keyword(s):  
Fragmentation Function ◽  
Evolution Equations ◽  
Heavy Quarkonia ◽  
Large Transverse Momentum ◽  
Heavy Quark Mass ◽  
Qcd Factorization ◽  
Factorization Formalism ◽  
Quarkonium Production ◽  
Large Enhancement ◽  
Fragmentation Functions

We summarize the results of a recent study on a new perturbative QCD factorization formalism for the production of heavy quarkonia of large transverse momentum pT at collider energies. Such a new factorization formalism includes both the leading power (LP) and next-to-leading power (NLP) contributions to the cross section in the [Formula: see text] expansion for heavy quark mass mQ. For the NLP contribution, the so-called double parton fragmentation functions are involved, whose evolution equations have been derived. We estimate fragmentation functions in the non-relativistic QCD formalism, and found that their contribution reproduce the bulk of the large enhancement found in explicit NLO calculations in the color singlet model. Heavy quarkonia produced from NLP channels prefer longitudinal polarization, in contrast to the single parton fragmentation function. This might shed some light on the heavy quarkonium polarization puzzle.

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