In this talk I will present a high level summary of the EIC science that made the case for it, along with some new avenues of investigations that are emergent. I will also review the status of the EIC project, setup up by the US DOE for its expeditious realization and completion.
EIC is the world's first electron-ion collider. We have formed the EIC Japan Group to bring together those who wish to participate in the EIC project in order to prepare for Japanese researchers to participate in the EIC.
The forward detecting system for ePIC experiment is introduced with focus on the zero calorimeter detector. The physics scope and the corresponding detector requirement is discussed. In addition, ongoing studies on diffraction studies at RHICf is presented to suggest the extension at the EIC.
Barrel electromagnetic calorimeters for the Electron-Ion Collider (EIC), essential for electron-pion separation, require excellent photon energy resolution and high granularity for photon-π0 distinction. They must have a broad dynamic range, even at low energies, within the limited space of the solenoid magnet. This subdetector, critical for the inclusive physics program at high Q2, demands a...
The Barrel Imaging Calorimeter for the ePIC experiment at the Electron-Ion Collider comprises silicon layers for position measurement and bulk Pb-SciFi layers for energy measurement. For the silicon layers, AstroPix chips under development for the AMIGO-X project will be used. Since the coverage of silicon layers is significantly larger than the usual silicon trackers, it is crucial to set up...
Future collider projects such as FCC (CERN), CEPC (China), ILC (Japan) and EIC (US) are intensively being discussed in world-wide HEP communities. Such projects strongly request the new or upgraded detector technologies to achieve the physics goals. In this talk, we present the calorimeter detector R&Ds which have been done in Korea recently for the future collider projects and discuss how we...
A collaboration was formed among the experimental particle physics groups in Taiwan to participate in the upcoming EIC project.
This talk will introduce the expertise of Taiwanese groups, our physics interests, recent contributions to the ZDC and TOF detector at the ePIC, and our plans.
The MIP Timing Detector (MTD) is a new sub-detector planned for the Compact Muon Solenoid (CMS) experiment at CERN, aimed at maintaining the excellent particle identification and reconstruction efficiency of the CMS detector during the High-Luminosity LHC (HL-LHC) era. The MTD will provide new and unique capabilities to CMS by measuring the time-of-arrival of minimum ionizing particles with a...
In this talk, we present the pseudoscalar (PS) meson quasi-distribution amplitude (QDA), which is supposed to be an asymptotic analog to the meson distribution amplitude (DA) in the limit of the large longitudinal PS-meson momentum, employing the nonlocal chiral-quark model (NLChQM) in the light-front (LF) formalism with a minimal Fock-state for the mesons at the low-energy scale parameter of...
The current-component independent extraction of the pion electromagnetic form factor has been analyzed in the light-front quark model. From this light-front covariant analysis of the pion form factor, we compute the unpolarized transverse momentum dependent (TMD) distributions of the pion beyond the leading twist. We also discuss the parton distribution functions (PDFs) obtained from the...
Transition generalized parton distributions (GPDs) can be accessed through several classes of hard exclusive reactions including the non-diagonal Deeply Virtual Compton Scattering (DVCS) and non-diagonal Deeply Virtual Meson Production (DVMP) in which the target hadron transforms into a resonating hadronic system. Transition GPDs encode valuable information on the dynamics of hadron...
A Hamiltonian model has been developed to investigate J/Ψ photo-production reaction on the nucleon. A J/Ψ -N potential has been extracted by analyzing from photoproduction reaction using the Pomeron exchange Model and the Constituent Quark Model (Pom-CQM). To account the quark substructure of J/Ψ, we use the realistic CQM wavefunction by J. Segovia, at all in the reaction amplitude. The result...
Generalized Parton Distributions (GPDs) describe the correlations between the longitudinal momentum and the transverse position of the partons inside the nucleon. They are nowadays the subject of an intense effort of research, in the perspective of understanding nucleon spin and the nucleon Gravitational Form Factors (GFFs). Experimentally and theoretically, the most studied reaction to access...
As the world’s only collider capable of polarized proton-proton (p + p) collision, the Relativistic Heavy Ion Collider (RHIC) provides a unique opportunity for the study of proton spin. The PHENIX and the STAR experiments at RHIC have been exploring many interesting probes for more than a decade. In this talk, a personal study on high-lights of the RHIC spin program, especially for RHIC runs...
Exclusive electroproduction of vector mesons is a suitable place to test model predictions in a kinematic region where the transition between the hadronic and partonic domains is involved according to the ranges of the photon virtuality Q^2 and the photon energy W. We investigate vector-meson electroproduction off the proton target by employing an effective Lagrangian approach In addition to...
The investigation of Generalized Parton Distributions (GPDs) provides a unique perspective on understanding the nucleon’s structure. Unlike traditional methods that rely on probes like photons and pions to explore nucleon form factors, this approach faces limitations when dealing with tensor and gravitational form factors. GPDs offer a solution by allowing the redefinition of these form...
In this presentation, we discuss the properties of the generalized valence-quark distribution functions of the kaon, based on an effective chiral-quark model approach. We compute the valence strange and light quark distributions of the kaon, $H^{q/{K^+}}(x, \xi, t) $, for the ERBL and DGLAP region by adopting the nonlocal chiral quark model defined at a low-renormalization point $\mu \approx...
We revisit the application of the Froissart-Gribov projections in the analysis of amplitudes for deeply virtual Compton scattering, providing essential information on generalized parton distributions (GPDs).
The pivotal role of these projections in a systematic description of a hadron's response to string-like QCD probes characterised by different values of angular momentum, $J$, is...
We discuss the problem of model dependency in the extraction of generalized parton distributions (GPDs). In processes like deeply virtual Compton scattering (DVCS), this problem is highlighted by the presence of 'shadow' GPDs, which do not contribute to observables for this process. The problem can be solved by considering double deeply virtual Compton scattering (DDVCS), which will be...
Generalized Parton Distributions (GPDs) are nowadays the object of an intense effort of research, in the perspective of understanding nucleon structure. They describe the correlations between the longitudinal momentum and the transverse spatial position of the partons inside the nucleon and they can give access to the contribution of the orbital momentum of the quarks and gluons to the nucleon...
Inspired by the evidence of the EMC effect, indicating the structure functions of nuclei to that in the deuteron are modified, it is also expected that the partonic structure of hadrons is modified in the nuclear medium or finite nuclei. Besides the valence quark and sea quark distributions, the medium modification of the gluon distributions in nuclear medium and finite nuclei, which is one of...
