XXVIII International Workshop on Deep Inelastic Scattering and Related Subjects

Session

Joint Session: WG2+WG5

WG2+WG5

24 Mar 2020, 14:30

Brooklyn, NY

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

14. Dijet production in DIS: from low to high $x$

Jamal Jalilian-Marian (Baruch College, City University of New York)

24/03/2020, 14:30

Small-x, Diffraction and Vector Mesons

Contributed Talk

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.

155. Proton Orbital Angular Momentum at Small 𝑥

Yuri Kovchegov (The Ohio State University)

24/03/2020, 14:48

Small-x, Diffraction and Vector Mesons

Contributed Talk

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,...

173. Helicity at Small x: Bringing Back the Quarks

Yossathorn Tawabutr (The Ohio State University)

24/03/2020, 15:06

Small-x, Diffraction and Vector Mesons

Contributed Talk

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 $\mathrm{\Delta }q$ oscillates as a function...

269. Structure functions at small x from worldlines: polarized distributions

Andrey Tarasov (The Ohio State University)

24/03/2020, 15:24

Small-x, Diffraction and Vector Mesons

Invited Talk

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...

225. Lensing Mechanism Meets Small-x Physics: Single Transverse Spin Asymmetry in Polarized Proton-Proton and Polarized Proton-Nucleus Collisions

Melvin Santiago (Ohio State University)

24/03/2020, 15:42

Small-x, Diffraction and Vector Mesons

Contributed Talk

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...