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Generalized universality of higher transverse moments of quark transverse momentum dependent correlators

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Title Generalized universality of higher transverse moments of quark transverse momentum dependent correlators
 
Creator BUFFING, MGA
MUKHERJEE, A
MULDERS, PJ
 
Subject DEEP-INELASTIC-SCATTERING
SINGLE-SPIN ASYMMETRIES
DRELL-YAN
STATE INTERACTIONS
 
Description The color gauge-invariant transverse momentum dependent (TMD) quark correlators contain process dependent gauge links in the bilocal matrix elements. In this paper, we split these process dependent correlators into universal TMD correlators, which in turn can be parametrized in universal TMD distribution functions. The process dependence is contained in gluonic pole factors, of which the value is determined by the gauge link. The operator structures of the universal TMD correlators are identified using transverse moments. In this paper, specific results for double transverse weighting of quark TMDs are given. In particular, we show that for a spin 1/2 target one has three universal time-reversal even leading "pretzelocity distributions," two of which involve double gluonic pole matrix elements and come with process dependent gluonic pole factors. We generalize the results for single and double weighting to TMD correlators of any specific rank, illustrating it for unpolarized, spin 1/2 and spin 1 targets.
 
Publisher AMER PHYSICAL SOC
 
Date 2014-10-17T04:23:25Z
2014-10-17T04:23:25Z
2012
 
Type Article
 
Identifier PHYSICAL REVIEW D, 86(7)
http://dx.doi.org/10.1103/PhysRevD.86.074030
http://dspace.library.iitb.ac.in/jspui/handle/100/15939
 
Language en