Calculation of Transverse-Momentum-Dependent Evolution for Sivers Transverse<? format?> Single Spin Asymmetry Measurements

SM Aybat, A Prokudin, TC Rogers - Physical review letters, 2012 - APS
Physical review letters, 2012APS
The Sivers transverse single spin asymmetry (TSSA) is calculated and compared at different
scales using the transverse-momentum-dependent (TMD) evolution equations applied to
previously existing extractions. We apply the Collins-Soper-Sterman (CSS) formalism, using
the version recently developed by Collins. Our calculations rely on the universality
properties of TMD functions that follow from the TMD-factorization theorem. Accordingly, the
nonperturbative input is fixed by earlier experimental measurements, including both …
The Sivers transverse single spin asymmetry (TSSA) is calculated and compared at different scales using the transverse-momentum-dependent (TMD) evolution equations applied to previously existing extractions. We apply the Collins-Soper-Sterman (CSS) formalism, using the version recently developed by Collins. Our calculations rely on the universality properties of TMD functions that follow from the TMD-factorization theorem. Accordingly, the nonperturbative input is fixed by earlier experimental measurements, including both polarized semi-inclusive deep inelastic scattering (SIDIS) and unpolarized Drell-Yan (DY) scattering. It is shown that recent preliminary COMPASS measurements are consistent with the suppression prescribed by TMD evolution.
American Physical Society
以上显示的是最相近的搜索结果。 查看全部搜索结果