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Patrizia Rossi (Istituto Nazionale di Fisica Nucleare)09/12/2024, 09:00
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Paola Gianotti (LNF)09/12/2024, 09:10
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Nils Hüsken (JGU Mainz)09/12/2024, 09:20
In the last 20 years, multiple exotic hadron candidates were discovered in experiments around the world. Electron-positron annihilation experiments have played a big role in those discoveries, starting from the initial discovery of the X(3872), and covering the charged bottom- and charmonium-like Zb and Zc states, and exotic vector meson candidates in both charmonium and bottomonium. Today,...
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Daniel Winney (Universität Bonn (HISKP))09/12/2024, 09:55
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Derek Ian Glazier09/12/2024, 11:00
An abundance of candidates for hadronic exotic states have been discovered over the last 20 years. Details of the exact structure of many of these are still incomplete. In this presentation we will examine the potential for quasi-free photoproduction of mesons, at possible future Jefferson Lab and EIC facilities, to enhance our understanding. Quasi-free photoproduction is essentially...
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Malte Albrecht (Ruhr-Universitaet Bochum)09/12/2024, 11:35
In this talk we will present prospects and studies to facilitate spectroscopy of XYZ states in the charmonium mass region with the GlueX spectrometer in Hall-D and 22GeV of CEBAF electron beam energy. The current state of simulations for signal and background contributions will be shown and we will discuss the complementarity of this program with respect to the program proposed for...
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Mikhail Bashkanov (University of York)09/12/2024, 12:05
The KLF project aims to discover many new particles in the strange quark sector, elucidate the interaction of strange-quark containing baryons (hyperons) with nucleons and, through the unprecedented Kaon flux of 1 billion Kaons per day enable searches for rare KL decays at new limits. Alongside the hadron physics impact KLF can deliver key data for fundamental astrophysics including a deeper...
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Dr Kotaro Shirotori (Research Center for Nuclear Physics (RCNP), Osaka University)09/12/2024, 12:25
Understanding hadron formation is one of the fundamental goals of hadron physics. It is essential way to investigate the effective degrees of freedom of hadrons such as the quark-quark correlation, namely the diquark correlation. Spectroscopic observations of charmed and multi-strange baryons can provide a unique opportunity to study diquark correlation. Systematic studies of charmed and...
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Jian-ping Chen (Jefferson Lab)09/12/2024, 14:30
JLab22 allows precision study of light sea at intermediate-x region. Studies are being performed on SIDIS measurements in Hall C to extract information on unpolarized light sea quark distributions and with SoLID for polarized case.
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Prof. Zhihong Ye (Tsinghua University)09/12/2024, 14:55
The Solenoidal Large Intensity Device (SoLID) is a forward-scattering spectrometer situated in Hall-A at Jefferson Lab. With its large acceptance and full azimuthal angular coverage, SoLID can effectively manage high luminosities ranging from 10^{37} to 10^{39}/cm2/s utilizing both polarized and unpolarized targets. The detector leverages the full capabilities of the JLab 12 GeV upgrade and is...
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Michael Nycz (University of Virginia)09/12/2024, 15:20
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Alexandre Deur (Jefferson Lab)09/12/2024, 16:05
We will discuss how data from JLab@22GeV, combined with expected low-$x$ measurements from the EIC, can determine the QCD coupling $\alpha_s$ with an accuracy comparable to that of all current world data combined. Furthermore, this approach represents the first extraction of $\alpha_s$ directly sensitive to effects beyond its leading-order evolution, offering a novel test of perturbative QCD...
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Garth Huber (University of Regina)09/12/2024, 16:25
Meson and Nucleon Form Factors are fundamental hadron structure observables which give much information on QCD's transition from strong to perturbative scales as the probing interaction becomes increasingly hard. The interest in charged pion and kaon form factors is due to their relatively simple qbar-q valence structure and their status as Goldstone bosons of QCD. The measurement of the...
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Patrick Barry (Argonne National Lab)09/12/2024, 16:50
To obtain a clearer picture of QCD itself, it is important to study a wide range of structures in various color confined systems. In recent years, we have made considerable progress in understanding the structure of pions, the lightest of all hadrons, through Drell-Yan (DY) and leading neutron (LN) electroproduction data. However, kinematic overlap between these experiments is limited, and...
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09/12/2024, 17:10
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Jianwei Qiu (Jefferson Lab)10/12/2024, 09:00
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Dr Matteo Cerutti (Christopher Newport U. and Jefferson Lab)10/12/2024, 09:25
We present a first analysis by the CTEQ-JLab (CJ) Collaboration of the potential impact of data from a 22 GeV upgrade of Jefferson Lab on parton distribution functions (PDFs) in the large-momentum fraction (large x) region. Using Monte Carlo pseudodata generated for the kinematic coverage of Hall C, we examine the constraints that these new data could provide on PDFs, Higher-Twist (HT)...
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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... -
10/12/2024, 17:30
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10/12/2024, 17:30
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10/12/2024, 17:30
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Lubomir Pentchev (Jefferson Lab)11/12/2024, 09:00
The charmonium photo/electro-production close to threshold can be used, under certain assumptions, to study the the gluon properties of the nucleon such as gluon form factors, mass radius of the proton, and the anomalous contribution to the proton mass. I will present analysis of the existing JLab J/psi data discussing the possibility of extracting gluon form factors based on some general...
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Carlos Munoz Camacho11/12/2024, 09:25
The future Electron-Ion Collider (EIC) will be a powerful tool for studying the internal structure of nucleons and nuclei at low x, where gluons dominate and current knowledge remains limited. Investigating exclusive reactions, such as Deeply Virtual Compton Scattering (DVCS) or Deeply Virtual Meson Production (DVMP), will enable access to the Generalized Parton Distributions (GPDs) of...
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Rachel Montgomery (University of Glasgow)11/12/2024, 09:50
This talk will discuss upcoming tagged deep inelastic scattering (TDIS) measurements at Jefferson Lab, which will directly probe the elusive mesonic content of the nucleon. The TDIS experiment will measure low momentum recoiling (and spectator) hadrons in coincidence with deep inelastically scattered electrons from hydrogen (and deuterium) targets. Through use of a recoil detector, a tagging...
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Patrick Achenbach (Jefferson Lab)11/12/2024, 10:10
On behalf of the CLAS Collaboration
Studies of nucleon resonance electroexcitation amplitudes are providing insight into many facets of strong QCD dynamics. These amplitudes have become available from the analyses of exclusive electroproduction experiments at Jefferson Lab with CLAS in the range of momentum transfers up to 5 GeV$^2$ and are currently extended to momentum transfers up to 10...
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Prof. Adnan Bashir (University of Michoacan and University of Huelva)11/12/2024, 10:55
Understanding the strong interaction dynamics, which triggers the emergence of hadron mass (EHM), presents a challenging problem within the Standard Model of particle physics. Experimental extraction of electromagnetic and transition form factors of mesons and baryons for increasingly larger virtual photon four-momentum squared (i.e., photon virtuality,) as well as their more complete...
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Alexis Osmond (University of South Carolina)11/12/2024, 11:20
This presentation covers recent advancements in the refined simulations of double pion electroproduction for CLAS22. Double pion production provides a valuable probe of baryon structure, requiring accurate simulations for proper interpretation of experimental data. The presentation addresses the feasibility of extending the kinematic coverage beyond CLAS12, discussing resolution and acceptance...
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Gabriel Niculescu (James Madison University)11/12/2024, 11:40
Using Thomas Jefferson's National Accelerator Facility's 10.6 GeV beam
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and the CLAS12 large solid angle spectrometer, inclusive electron proton cross sections were measured over a wide kinematic range from the pion threshold up to an invariant mass W of 2.55 GeV, for ten Q^2 bins between 2.5 and 10.4 GeV^2. These results were validated against existing world data set in the overlap region and... -
Oleg Denisov (Istituto Nazionale di Fisica Nucleare)11/12/2024, 12:00
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Prof. Satoshi N. Nakamura (the University of Tokyo)11/12/2024, 12:20
At J-PARC, a project to extend the Hadron Experimental Hall is underway, where various nuclear and hadron physics experiments will be conducted. Among them, the precision spectroscopy of $\Lambda$ hypernuclei stands as one of the flagship experiments. Recently, at JLab, new $\Lambda$ hypernuclear experiments using electron beams have been approved, and hypernuclear spectroscopy will be...
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Rafayel Paremuzyan (Jefferson Lab)11/12/2024, 12:40
One of the main challenges in the extraction of Generalized Parton Distributions (GPDs) from the currently available experimental data is that experimental observables can access only two of three variables, x, ξ, and t, that define the GPDs. The variable 𝑥 is integrated over in the DVCS and TCS amplitudes due to the loop in the “handbag” diagrams. The only information that can be accessed in...
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Ian Cloet12/12/2024, 09:00
The study of nuclei in terms of quark and gluon degrees of freedom remains a rich frontier in nuclear physics. Jefferson Lab is at the luminosity frontier and is the leading facility to explore the explicit role of QCD in nuclei, where several new discoveries are possible with an energy of 22 GeV. This talk will explore some of the opportunities to study QCD in nuclei at JLab 22 GeV, and...
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Matteo Rinaldi (Istituto Nazionale di Fisica Nucleare)12/12/2024, 09:30
We present the description of the structure of light-nuclei (H2, H3, He3 and He4) in impulse approximation within the Light-Front approach [1,2], retaining nucleonic dof, only. In particular, the latter has been applied to investigate the reaction mechanism of polarized and unpolarized deep inelastic scattering (DIS) on nuclear targets, in the valence region and in the Bjorken limit [3,4,5]....
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Nadia Fomin (University of Tennessee)12/12/2024, 09:50
Much has been learned about 2N short-range correlations in JLab's 6 and 12 GeV eras, with more still coming up. However, a successful observation of 3N SRCs still eludes us. Based on predictions, the current kinematic reach at JLab is right on the edge of where 3N SRCs should start to dominate and an observation is possible, but not inevitable. We will discuss planned and soon to be...
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Nathaly Santiesteban (University of New Hampshire)12/12/2024, 10:10
The deuteron is a spin-1 system, and its tensor properties continue to be elusive in experimental measurements due to the complexity of the polarized target. Recently, there has been an increase in interest in the physics of the tensor components of this system due to advances in target technology. This talk will discuss the implications of studying semi-inclusive deep inelastic scattering...
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John Arrington (Lawrence Berkeley National Laboratory)12/12/2024, 11:00
The microscopic origin of the EMC effect remains a mystery, with new observables proposed in recent years to elucidate its origin including measurements of the spin and flavor dependence of the EMC effect, the A dependence in light nuclei, and tagged measurements of DIS in the deuteron. A new possibility, enabled by a JLab energy upgrade, would maintain the clean interpretation of the...
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Holly Szumila-Vance (Florida International University)12/12/2024, 11:25
Searching for the onset of Color Transparency (CT) is a vibrant experimental effort to observe hadrons in a small color-neutral transverse size configuration in the nucleus. The observation of the onset of CT lies at the intersections between the quark-gluon degrees of freedom and the nucleonic descriptions of nuclei. CT is fundamentally predicted by perturbative quantum chromodynamics and is...
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Ms Taisiya Mineeva (CCTVaL, UTFSM)12/12/2024, 11:45
The main focus of the Jefferson Lab physics program of 6 GeV and 12 GeV era, which are now proposed to be extended here to 22 GeV, is to determine the mechanisms of confinement in hadron formation. A significant amount of information has been collected on understanding confinement through hadron spectroscopy. Another approach was introduced through the string-breaking mechanism studied via...
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Mathieu Ouillon (Mississippi State University)12/12/2024, 12:05
Decades after the discovery of the European Muon Collaboration (EMC) effect, theorists and experimentalists are still working to unravel its origin and deploy new methods to understand the in-medium modifications of nucleon structure. One novel way to probe the EMC effect is to study the fundamental structure of light nuclei, such as ²H and ⁴He, via the deeply virtual Compton scattering (DVCS)...
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Prof. Zhihong Ye (Tsinghua University)12/12/2024, 12:25
In this talk I will discuss the physics opportunities of studying quark structures w/ 22GeV electrons scattering off nuclei, mainly focusing on investigation of the unpolarized EMC effect, anti-shadowing effect, the 3D nuclear structure and other dynamics nuclear medium effects.
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Narbe Kalantarians (Virginia Union University)12/12/2024, 12:45
An upgrade of CEBAF at Jefferson Lab to around 22 GeV will open up key science that is not possible to access at 12 GeV. One kinematic regime where this is most possible is in the "middle" Bjorken x regime around 0.1, where the available momentum transfers at 12 GeV have limited or precluded several exciting measurements. Here, the long-standing mystery of anti-shadowing may now be probed for...
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Khepani Raya (University of Huelva)12/12/2024, 14:30
When discussing the Standard Model and the origin of mass, the Higgs boson often comes to mind. However, the majority of the mass in the visible universe arises from the nuclear strong interactions governed by quantum chromodynamics. In this presentation, we will explore how the study of pseudoscalar mesons can shed light on the origin of mass within the Standard Model and enhance our...
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Karol Kampf (Charles University)12/12/2024, 14:55
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Luc DARME (IP2I - Lyon 1 University)12/12/2024, 15:20
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Mariangela Bondi (Istituto Nazionale di Fisica Nucleare)12/12/2024, 15:45
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Marco Spreafico (Istituto Nazionale di Fisica Nucleare)12/12/2024, 16:10
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Patrick Moran (The College of William & Mary)12/12/2024, 16:45
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Sergi Gonzalez-Solis (University of Barcelona)12/12/2024, 17:05
Hadronic and radiative decays of light meson decays offer a privileged environment to test QCD and search for physics beyond the Standard Model. A new generation of precision experiments in hadron physics will soon offer new data that will provide sensitive probes to test potential New Physics including searches for dark photons, light scalars and axion-like particles, complementing worldwide...
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12/12/2024, 17:30
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12/12/2024, 17:30
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12/12/2024, 17:30
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Burkert Volker (Jefferson Lab)13/12/2024, 09:00
The proton’s internal structure has been probed through electromagnetic and weak interactions for over 70 years and very precise data on the electromagnetic and electroweak form factors have been determined. About the protons gravitational structure and mechanical properties, we have very little information albeit theoretical investigations were conducted already in the early 1960’s. There was...
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Alex Bogacz13/12/2024, 09:25
Extending the energy reach of CEBAF up to 22 GeV within the existing tunnel is being explored. Proposed energy upgrade can be achieved by increasing the number of recirculations, while using the existing CEBAF SRF cavity system. Presented scheme is based on an exciting new approach to accelerate electrons efficiently with multiple passes in a single FFA (Fixed Field Alternating Gradient) beam...
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Marco Battaglieri (Istituto Nazionale di Fisica Nucleare)13/12/2024, 09:50
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Allison Lung (Jefferson Lab)13/12/2024, 10:15
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Feng-Kun Guo (Institute of Theoretical Physics, Chinese Academy of Sciences)13/12/2024, 11:00
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Justin Stevens (William & Mary)13/12/2024, 11:25
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Nobuo Sato (Jefferson Lab)13/12/2024, 11:35
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Harutyun Avagyan, Nobuo Sato (Jefferson Lab)13/12/2024, 11:45
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Garth Huber (University of Regina)13/12/2024, 11:55
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Marco Battaglieri (Istituto Nazionale di Fisica Nucleare)13/12/2024, 12:05
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Lamiaa El Fassi (Mississippi State University), Misak Sargsian13/12/2024, 12:15
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Cynthia Keppel (Thomas Jefferson National Accelerator Facility)13/12/2024, 12:25
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Patrizia Rossi (Istituto Nazionale di Fisica Nucleare)13/12/2024, 12:50
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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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