EPJ Web of Conferences
Volume 85, 20154th International Workshop on Transverse Polarisation Phenomena in Hard Processes (TRANSVERSITY 2014)
|Number of page(s)||9|
|Published online||23 January 2015|
Limits of TMD evolution in SIDIS at moderate Q
Division of Science, Penn State University Berks, Reading, Pennsylvania, 19610, USA
a e-mail: firstname.lastname@example.org
Published online: 23 January 2015
We investigate semi-inclusive deep inelastic scattering measurements in the region of relatively small Q, where sensitivity to nonperturbative transverse momentum dependence can dominate the evolution. Using SIDIS data from the COMPASS experiment, we find that regions of coordinate space that dominate in TMD processes when the hard scale is of the order of only a few GeV are much larger than those commonly probed in large Q measurements. This suggests that the details of nonperturbative effects in TMD evolution are especially significant in the region of intermediate Q. We emphasize the strongly universal nature of the nonperturbative component of evolution. and its potential to be tightly constrained by fits from a wide variety of observables that include both large and moderate Q.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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