Speaker
Wayne Morris
(NYCU)
Description
The Collins-Soper (CS) kernel may be obtained through the TMD soft function by formulating the Wilson line in terms of 1-dimensional auxiliary fermion fields on the lattice. Our computation takes place in the region of the lattice that corresponds to the “spacelike” region in Minkowski space, i.e., Collins' scheme. By computing the "double ratio"; we are able to obtain a formula for directly calculating the CS kernel. The matching of our result to Minkowski space is achieved through the mapping of the complex auxiliary field directional vector to the Wilson line rapidity. We present a preliminary extraction of the CS kernel using the "double ratio", and discuss the methodology employed.
Authors
Anthony Francis
(National Yang Ming Chiao Tung University)
C.-J. David Lin
(Institute of Physics, National Yang Ming Chiao Tung University)
Wayne Morris
(NYCU)
Dr
Yong Zhao
(Argonne National Laboratory)