TY - GEN
T1 - Non-dipolar gauge links for transverse-momentum-dependent pion wave functions
AU - Wang, Yu-Ming
N1 - Publisher Copyright:
© Owned by the authors, published by EDP Sciences, 2016.
PY - 2016
Y1 - 2016
N2 - I discuss the factorization-compatible definitions of transverse-momentum-dependent (TMD) pion wave functions which are fundamental theory inputs entering QCD factorization formulae for many hard exclusive processes. I will first demonstrate that the soft subtraction factor introduced to remove both rapidity and pinch singularities can be greatly reduced by making the maximal use of the freedom to construct the Wilson-line paths when defining the TMD wave functions. I will then turn to show that the newly proposed TMD definition with non-dipolarWilson lines is equivalent to the one with dipolar gauge links and with a complicated soft function, to all orders of the perturbative expansion in the strong coupling, as far as the infrared behavior is concerned.
AB - I discuss the factorization-compatible definitions of transverse-momentum-dependent (TMD) pion wave functions which are fundamental theory inputs entering QCD factorization formulae for many hard exclusive processes. I will first demonstrate that the soft subtraction factor introduced to remove both rapidity and pinch singularities can be greatly reduced by making the maximal use of the freedom to construct the Wilson-line paths when defining the TMD wave functions. I will then turn to show that the newly proposed TMD definition with non-dipolarWilson lines is equivalent to the one with dipolar gauge links and with a complicated soft function, to all orders of the perturbative expansion in the strong coupling, as far as the infrared behavior is concerned.
UR - https://www.scopus.com/pages/publications/84976869414
U2 - 10.1051/epjconf/201611201021
DO - 10.1051/epjconf/201611201021
M3 - Contribution to proceedings
VL - 112
T3 - EPJ Web of Conferences
BT - 6th International Conference on Physics Opportunities at an Electron-Ion Collider
A2 - Marquet, C
A2 - Pire, B
A2 - Sabatie, F
PB - E D P Sciences
T2 - 6th International Conference on Physics Opportunities at an Electron-Ion Collider
Y2 - 7 September 2015 through 11 September 2015
ER -