Resummation, Evolution, Factorization 2022

Session

Parallel Session A: TMD in experiment: DIS

TMD in experiment: DIS (p2)

2 Nov 2022, 16:50

Conveners

Parallel Session A: TMD in experiment: DIS

• Piet Mulders (Nikhef and VU University)

Parallel Session A: TMD in experiment: DIS: Parallel Session 1

• Itana Bubanja

57. The photon energy spectrum in B➞Xₛγ at N³LL'

Ivan Novikov (DESY)

02/11/2022, 16:50

The smallest element of the CKM matrix, $|V_{ub}|$, can be extracted from measurements of semileptonic B meson decay $B\to X_ul\bar{\nu}$. However, the experimental signal of this process is obscured by large backgrounds, which are absent only at the edge of the phasespace. Resummation of perturbative series is essential in this kinematic region. Furthermore, this region is sensitive to Fermi...

25. Measurement and QCD analysis of inclusive jet production in deep inelastic scattering at HERA

Florian Lorkowski (CMS (CMS Fachgruppe QCD))

02/11/2022, 17:40

A new measurement of inclusive jet cross sections in neutral current deep inelastic scattering using the ZEUS detector at the HERA collider is obtained. The data were taken at HERA 2 at a center of mass energy of 318 GeV and correspond to an integrated luminosity of 347 pb-1. Massless jets, reconstructed using the kT-algorithm in the Breit reference frame, are measured as a function of the...

24. Impact of jet-production data on the next-to-next-to-leading-order determination of HERAPDF2.0 parton distributions

Katarzyna Wichmann (DESY)

02/11/2022, 18:00

On behalf of the H1 and ZEUS Collaborations.
Eur. Phys. J. C82 (2022) 243

The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic ep scattering together with jet data as published by the H1 and ZEUS collaborations. A perturbative QCD...

52. Analysis of world polarized DIS data with small-$x$, Large $N_c \& N_f $ helicity evolution

Daniel Adamiak (Ohio State University)

02/11/2022, 18:20

In order to solve the proton spin problem, the small-$x$ asymptotics of the helicity parton distribution functions (hPDFs) need to be understood. New theory has been developed for the small-$x$ evolution of these hPDFs, able to extrapolate the small-$x$ behaviour of the quark and gluon hPDFs. At large $N_c \& N_f$, these evolution equations close and are amenable to numerical computation. In...

55. Production of J/psi in electron-proton collision in kT factorization.

Vaibhav Rawoot

02/11/2022, 18:40

We calculate the differential cross section for the production of J/psi in electron-proton collision within the formalism of QCD kT factorization. We present distributions in transverse momentum and rapidity for COMPASS, JLab, HERMES and EIC centre of mass energies. Our results are compared with the experimental data for production J/psi at electron-proton scattering experiments. We predict...