[Theory-seminars] Seminars next week

[Carlota Andres]

Dear all, 

Here is a reminder for next week's seminars:

Theory Seminar:
Monday, November 5th, 1PM, Room L102
Matthew Sievert (Rutgers University), "Mapping Hadronic Structure at Small x"
BlueJeans connection: https://bluejeans.com/321085255

Abstract:
The emergent properties of hadrons, such as the dynamical origin of the proton spin, always include “invisible” contributions beyond the reach of experiments.  Because QCD sum rules, like the ones describing the proton spin budget, often require integrating observed quantities over the entire range of x from 0 to 1, they can be affected by contributions residing below the threshold xmin of any finite-energy experiment.  For this reason, any complete picture of hadronic structure requires a robust theoretical framework which can systematically extrapolate experimental data into the asymptotic small-x regime.  In this talk, I will present and solve the small-x quantum evolution equations describing a range of collinear and transverse-momentum-dependent parton distribution functions, including the unpolarized quark and gluon distributions, the quark and gluon helicity distributions, and the quark transversity distribution.  These results, along with the general framework for computing the small-x asymptotics of various operators, can help estimate the “invisible” contributions hiding at small x and connect local operators computed on the lattice to observed parton distributions measured in experiments.  Expanding this program and building the corresponding phenomenology will be a key part of delivering on the potential of a future electron-ion collider.  


Cake Seminar:
Wednesday, November 7th, 1PM, Room L102
Eric Moffat (ODU), "What does mass sensitivity in DIS reveal about hadron structure?"
BlueJeans link: https://bluejeans.com/195615763

Abstract:
We discuss target mass effects in DIS and what those effects can reveal about the internal dynamics of hadrons. We demonstrate this with specific examples in a simple Yukawa theory.

Raza, Vincent, Carlota