Resummation, Evolution, Factorization 2023 (REF2023)

Session

Power corrections

Oct 23, 2023, 2:00 PM

Aula M1 (Facultad de Físicas)

37. Applications of SCET to Transverse Momentum Distributions

Iain Stewart (MIT)

10/23/23, 2:00 PM

Talk

In this talk I discuss applications of Soft Collinear Effective Theory (SCET) to TMD observables at leading and subleading power. In particular, I discuss matching between resummed and fixed order results to obtain cross sections accurate for both small and large transverse momentum simultaneously, and applications like the transverse lepton pT in W production. I also discuss the collinear...

38. Subleading-Power Soft Subtleties in SIDIS

Anjie Gao (MIT)

10/23/23, 2:30 PM

We consider the factorization of transverse momentum-dependent azimuthal asymmetries in semi-inclusive DIS (SIDIS), Drell-Yan and e+e- to dihadron, which appear at the first subleading power in the expansion for small transverse momentum. These observables feature an intricate all-order resummation structure common to many applications of SCET at subleading power. In addition, and perhaps more...

4. TMD factorization at next-to-leading power

Simone Rodini (DESY)

10/23/23, 3:00 PM

Talk

In this talk I will review the recent progress and results concerning next-to-leading power factorization. I will mostly focus on semi-inclusive DIS process, showing the derivation of the structure functions at one-loop accuracy.
I will comment on some of the specific details that emerge at next-to-leading power, such as the cancellation of special rapidity divergences and the emergence of...

13. Transverse Momentum Measurements with Jets at Next-to-Leading Power

Max Jaarsma (University of Amsterdam)

10/23/23, 4:00 PM

Talk

In view of the increasing precision of theoretical calculations and experimental measurements, power corrections to transverse-momentum-dependent observables have become highly important. Power corrections for TMD observables are a rich and complex subject, and are difficult to grasp even in the most simple scenarios. Our goal is to understand TMD factorization at next-to-leading power for a...

26. Local Infrared Safety in four dimensions

Aniruddha Venkata (Stony Brook University)

10/23/23, 4:30 PM

Talk

In this talk, I will show a general expression for weighted cross sections in leptonic annihilation to hadrons based on time-ordered perturbation theory (TOPT). For any infrared-safe weight, the cancellation of infrared divergences is implemented locally at the integrand level, and in principle can be evaluated numerically in four dimensions. We go on to show that it is possible to eliminate...