Title 



QCD evolution of (un)polarized gluon TMDPDFs and the Higgs distribution
 
Author 



 
Abstract 



We provide the proper definition of all the leadingtwist (un)polarized gluon transverse momentum dependent parton distribution functions (TMDPDFs), by considering the Higgs boson transverse momentum distribution in hadronhadron collisions and deriving the factorization theorem in terms of them. We show that the evolution of all the (un)polarized gluon TMDPDFs is driven by a universal evolution kernel, which can be resummed up to nexttonexttoleadinglogarithmic accuracy. Considering the proper definition of gluon TMDPDFs, we perform an explicit nexttoleadingorder calculation of the unpolarized (f(1)(g)), linearly polarized (h(1)(perpendicular to g)) and helicity (g(1L)(g)) gluon TMDPDFs, and show that, as expected, they are free from rapidity divergences. As a byproduct, we obtain the Wilson coefficients of the refactorization of these TMDPDFs at large transverse momentum. In particular, the coefficient of g(1L)(g), which has never been calculated before, constitutes a new and necessary ingredient for a reliable phenomenological extraction of this quantity, for instance at RHIC or the future AFTER@LHC or ElectronIon Collider. The coefficients of f(1)(g) and h(1)(perpendicular to g) have never been calculated in the present formalism, although they could be obtained by carefully collecting and recasting previous results in the new TMD formalism. We apply these results to analyze the contribution of linearly polarized gluons at different scales, relevant, for instance, for the inclusive production of the Higgs boson and the Ceven pseudoscalar bottomonium state eta(b). Applying our resummation scheme we finally provide predictions for the Higgs boson q(T)distribution at the LHC.   
Language 



English
 
Source (journal) 



Journal of high energy physics.  Bristol  
Publication 



Bristol : 2015
 
ISSN 



11266708
10298479 [online]
 
Volume/pages 



7(2015), 49 p.
 
Article Reference 



158
 
ISI 



000358745300001
 
Medium 



Eonly publicatie
 
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