Conveners
Joint Session: WG2+WG5: Day2-afternoon-1
- Daniel Tapia Takaki (University of Kansas)
- Renee Fatemi (University of Kentucky)
- Martha Constantinou (Temple University)
- Robert Ciesielski (The Rockefeller University)
- Sanghwa Park ()
Using a newly proposed formalism which generalizes the Color Glass Condensate formalism and extends it to large Bjorken $x$, we calculate the dijet double differential cross section and investigate its properties for different kinematics; from small $x$ to large $x$ and from low to high transverse momenta.
We determine the small Bjorken $x$ asymptotics of the quark and gluon orbital angular momentum (OAM) distributions in the proton in the double-logarithmic approximation (DLA), which resums powers of $\alpha_s \ln^2 (1/x)$ with $\alpha_s$ the strong coupling constant. Starting with the operator definitions for the quark and gluon OAM, we simplify them at small $x$, relating them, respectively,...
We find the small-$x$ asymptotics of the quark helicity distribution in the large-$N_c$ & $N_f$ limit by numerically solving small-$x$ evolution equations derived in earlier works, where $N_c$ is the number of quark colors and $N_f$ is the number of quark flavors. Previously, those evolution equations were solved only in the large-$N_c$ limit. We find that $\Delta q$ oscillates as a function...
The worldline representation of quantum field theory is a powerful framework for the computation of perturbative multi-leg Feynman amplitudes. In particular, in gauge theories, it provides an efficient way, via point particle Grassmann functional integrals, to compute spinor and color traces in these amplitudes. In my talk I will give a short introduction into the worldline formalism and show...
We calculate the single transverse spin asymmetry (STSA) 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 [1], which includes multiple rescatterings and small-x...
