Resummation, Evolution, Factorization 2023 (REF2023)

Session

Theory

26 Oct 2023, 15:00

Aula M1 (Facultad de Físicas)

46. Factorization of Non-Global LHC Observables and Resummation of Super-Leading Logarithms

Matthias Neubert (Mainz University)

26/10/2023, 15:00

We present a systematic formalism based on a factorization theorem in soft-collinear effective theory to describe non-global observables at hadron colliders, such as gap-between-jets cross sections. The cross sections are factorized into convolutions of hard functions, capturing the dependence on the partonic center-of-mass energy $\sqrt{\hat s}$, and low-energy matrix elements, which are...

56. Test of gluon TMD from HERA data at low Q^2 and soft hadron production at LHC

Gennady Lykasov

26/10/2023, 15:30

Talk

Using the analytical expression for traverse momentum dependent (TMD) gluon density in a proton , a self-consistent simultaneous description of low Q^2 data on proton structure function F_2(x,Q^2), reduced cross-section for the electron proton scattering at HERA and soft hadron production in pp collisions at the LHC is achieved in the framework of color dipole approach and modified quark-gluon...

21. Hidden soft effects from TMD Fragmentation Functions extractions

Andrea Simonelli (Jefferson Lab and ODU)

26/10/2023, 16:30

Talk

Transverse Momentum Dependent (TMD) factorization leads to well established theorems for a restricted class of processes. In such cases, some of the effects produced by the soft radiation cancel out and the physics associated to them cannot be accessed. Extension of the factorization to non-standard processes inevitably leads to deal with the non trivial structure of the soft sector, revealing...

24. Recent progress on track functions

Wouter Waalewijn (University of Amsterdam)

26/10/2023, 17:00

Talk

Track-based observables offer superior angular resolution and pile-up suppression. I developed a theoretical framework to account for the conversion to tracks using track functions, which are a kind of generalized fragmentation functions. I will discuss recent progress, including our determination of the evolution of track functions at order alpha_s^2, from which the evolution of multi-hadron...

41. PanScales: next-generation parton showers

Alba Soto Ontoso

26/10/2023, 17:30

Talk

In this talk I will give an overview of the latest developments on parton-showers within the PanScales framework. First, I will discuss the criteria that a parton shower needs to meet from a logarithmic resummation perspective. Then, I will introduce the next-to-leading logarithmic accurate PanScales showers for different collision systems: e+e-, DIS and colour singlet production in pp....