Conveners
TMDs in proton-proton collisions
- David Richards (Jefferson Lab)
Description
co-host: Fatma Aslan
We made simultaneous extraction of spin averaged and spin dependent PDFs within multistep MC procedures, with combined analysis of inclusive unpolarized and polarized Jet from RHIC to Tevatron energies. By analyzing the preliminary results we had, we were able to further constrain on $\Delta g$.
There have been various attempts, both experimentally and theoretically, to understand the origin of the unexpectedly large transverse single-spin asymmetries ($A_N$) for inclusive hadron production at forward rapidity in p$^\uparrow$ + p collisions that persist at high center-of-mass energies. Two proposed potential sources are the twist-3 contributions in the collinear factorization and the...
While significant steps toward the formal definition of quark TMDs and their extraction from experimental data through global fits has been made in the last years, the gluon-TMD field represents a largely unexplored territory. Pursuing the goal of extending our knowledge of this sector, we present analytic expressions for unpolarized and polarized gluon TMDs at twist-2, calculated in a...
We calculate the single transverse spin asymmetry in polarized proton-proton and polarized proton-nucleus collisions ($A_N$) generated by a partonic lensing mechanism. The polarized proton is considered in the quark-diquark model while its interaction with the unpolarized target is calculated using the small-$x$/saturation approach. The phase required for the asymmetry is caused by a...
One of the main goals of the RHIC spin program is the determination of the transverse-spin structure of the proton, which can in turn provide some insight into the angular-momentum component of partons. The transverse single spin asymmetry ($A_{N}$) of pion production at mid-rapidity in pp collision provides good access to initial and final state transverse spin effects of quark and gluons. In...
