Conveners
Hadronization and Transverse Momentum
- Nobuo Sato (Jefferson Lab)
Hadronization and Transverse Momentum
- Nobuo Sato (Jefferson Lab)
Hadronization and Transverse Momentum
- Harutyun Avagyan
Hadronization and Transverse Momentum
- Harutyun Avagyan
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Bakur Parsamyan (Istituto Nazionale di Fisica Nucleare)10/12/2024, 09:50
From 2002 to 2022, the COMPASS collaboration performed a series of nucleon spin structure measurements employing high-energy muon beams impinging on polarized targets.
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Over the years, the experiment has become a pivotal contributor to the investigation of parton transverse momentum-dependent (TMD) phenomena.
This presentation will focus on selected highlights of the COMPASS TMD programme,... -
Harutyun Avagyan10/12/2024, 10:10
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Christopher Dilks (Jefferson Lab)10/12/2024, 11:00
Monte Carlo event generators are foundational to the simulation of a high-energy physics experiment. Pythia, a general-purpose event generator commonly used for Semi-Inclusive Deep Inelastic Scattering (SIDIS) studies, is highly configurable and provides the option to allow user program code to modify the event generation procedure. The String+$^3P_0$ model shows promise in describing the spin...
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Pasquale Di Nezza (Istituto Nazionale di Fisica Nucleare)10/12/2024, 11:20
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Carl Carlson (William & Mary)10/12/2024, 11:40
With 22 GeV electrons striking a fixed proton or nuclear target, there is a regime where the highest momentum pion or rho meson electroproduction proceeds by a perturbatively calculable process. The process is not the leading twist fragmentation one but rather a higher twist process that produces kinematically isolated mesons. Our calculations demonstrate, in particular, that an energy...
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Alberto Accardi (Hampton U. and Jefferson Lab)10/12/2024, 12:00
We briefly review the (not abundant) literature on hadron mass corrections in SIDIS, and numerically evaluate their impact on calculations of pT-integrated cross sections at 22 GeV. Even though power suppressed as 1/Q^2, these corrections are not negligible for pion production and large for kaon production. This calls for renewed theoretical and phenomenological community efforts, especially...
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Alessio Carmelo Alvaro (Università di Pavia)10/12/2024, 12:20
Sub-leading twist contributions to scattering processes, such as semi-inclusive DIS (SIDIS), are gaining increased attention as they provide valuable insights that complement leading-twist contributions in probing the proton structure.
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In this talk I will present the results for the matching relations of twist-3 transverse momentum dependent distributions (TMDs) onto collinear distributions... -
Prof. Mariaelena Boglione (Istituto Nazionale di Fisica Nucleare)10/12/2024, 14:30
Exploration of regions of hadron production in SIDIS depends strongly on the energy span and the luminosity of experimental measurements. In this talk I will present the future opportunities at Jefferson Lab upgrade
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at 22 GeV on the basis of the "affinity" to each relevant kinematic region (TMD, central, collinear). One of the key aspects of the
experimental program of Jefferson Lab is the... -
Marco Zaccheddu (Jefferson Lab)10/12/2024, 14:50
In this talk, we introduce a new approach for parameterizing Transverse-Momentum Dependent PDF (TMDs). By treating TMDs as multidimensional images or tensors, we propose a pixel-based representation. This novel perspective offers a versatile framework for analyzing and manipulating TMDs, enabling us to leverage a wide range of image processing techniques.
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We will demonstrate the effectiveness... -
Andrea Simonelli10/12/2024, 15:03
abstract: Factorization of deep inelastic scattering (DIS) cross sections is revisited to highlight the importance of tracking off-lightcone effects in the proof of collinear factorization theorems. In inclusive DIS at large Bjorken x, particle production develops around two opposite near lightcone directions just like in transverse momentum dependent processes, and the Collins-Soper kernel...
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Timothy Hayward10/12/2024, 15:16
In semi-inclusive deep inelastic scattering (SIDIS), when a second hadron produced from the target remnant is detected in coincidence with the primary hadron produced in the current an entire suite of new transverse-momentum dependent (TMD) observables becomes accessible. These observables are known as fracture functions and can be linked to each of the more well known TMDs, such as the...
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Simone Vallarino (Istituto Nazionale di Fisica Nucleare)10/12/2024, 15:29
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Lorenzo Rossi (Istituto Nazionale di Fisica Nucleare)10/12/2024, 15:42
In this talk, we report the latest results from the MAP Collaboration on the extraction of unpolarized quark Transverse-Momentum-Dependent Parton Distributions (TMD PDFs) and Fragmentation Functions (TMD FFs) based on global fits to Drell-Yan and Semi-Inclusive Deep-Inelastic Scattering (SIDIS) datasets. Specifically, we examine the impact of incorporating flavor dependence in the...
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Dr Matteo Cerutti (Christopher Newport U. and Jefferson Lab)10/12/2024, 16:02
In this talk, I present the recent results from the MAP Collaboration on the extraction of the quark transverse-momentum-dependent helicity distribution (helicity TMD), which will offer insights into the difference between the three-dimensional motion of quarks with polarization parallel or antiparallel to the longitudinal polarization of the parent hadron. By analyzing experimental data of...
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Yiyu Zhou (University of Turin)10/12/2024, 16:40
A recent global QCD analysis of jet production and other polarized scattering data has found the presence of negative solutions for the gluon helicity distribution in the proton, $\Delta g$, along with the traditional $\Delta g > 0$ solutions. We consider polarized semi-inclusive deep-inelastic scattering for hadrons produced with large transverse momentum as a means of constraining the...
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Tetiana Yushkevych (University of Torino, Physics Department, via Giuria 1, 10125 Torino (Italy))10/12/2024, 16:53
I will present the resent extension of the AFFINITY numerical tool that allows experimental data to be connected to the corresponding theoretical framework. More specifically, I will focus on the affinity to the TMD region as predicted for the upgraded JLab22 kinematics in comparison with the existing JLab12 and the planned EIC experiments.
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Affinity projections show that the high increase in... -
Filippo Delcarro (Istituto Nazionale di Fisica Nucleare)
Our knowledge of the three-dimensional structure of nucleons in terms of structure functions, will be soon improved by measurements at recent and future planned experiments. In this talk I will discuss the impact of measurements at SoLID and EPIC on the uncertainties of polarized and unpolarized TMDs.
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