We present a novel two‐stage particle‐identification (PID) workflow for the ePIC Barrel Imaging Calorimeter (BIC) at the future Electron–Ion Collider. In the first stage, we exploit the classical calorimeter‐to‐track energy ratio E/p (optimally summing energy across the first eight SciFi layers) to achieve a 97 % electron efficiency and a pion rejection factor R_π≈23.5. In the second stage, we...
In February 2025, a prototype for the ePIC Electron Endcap Electromagnetic Calorimeter (EEEMCal) was tested at the DESY II Test Beam Facility in Hamburg, Germany. The prototype consisted of 25 lead-tungstate ($\hbox{PbWO}_4$) crystals with an SiPM readout. Each crystal was instrumented with 16 SiPMs, read out either individually, with four in parallel, or with all 16 in parallel by the...
The Electron-Ion Collider is an in-development facility that will enable further experimental study of the properties and behavior of fundamental and hadron-scale particles. In order for this project to proceed optimally, considerable efforts are required to design detectors and other equipment suitable to the physics specifications set for the Electron-Ion Collider. One of many planned...
We have measured the flavor dependence of charged pion multiplicities in SIDIS from proton and deuterium targets to explore charge symmetry violation in pion fragmentation functions. The data were collected using 10.2 and 10.6 GeV electron beams in Hall C at Jefferson Lab. The same data set also contains high-momentum protons from SIDIS events, which we are now analyzing to extract proton...
Gravitational form factors (GFFs) offer profound insights into the spatial distribution of the strong force within hadrons and are intimately linked to the trace anomaly -- a key feature of QCD that underpins the proton’s finite mass and the pion’s near-zero mass. These fundamental observables will be accessible with high precision in upcoming electron-ion collider experiments. On the...
AFFINITY is a numerical tool that allows experimental data to be connected to the corresponding theoretical framework: collinear or TMD factorization, as appropriate. Recently the affinity tool has been modified and upgraded in such a way that event-by-event analyses can be performed, improving its reliability and precision. I will present our most recent results for JLab12 phase space...
During a ten-year tenure that began with a summer internship, and comes to an end as scientific staff, I had the opportunity to contribute directly and indirectly to nearly every aspect of the development of photoguns and Wien spin rotators at Jefferson Lab: from GaAs photocathode activation to high-voltage testing and beam delivery, and from conceptual sketches to a patented design. This talk...
An overview of electron beam deposition techniques and experiments conducted at Stony Brook University for PID Detectors. Namely, an emphasis on pfRICH (proximity focusing RICH detector) and the coating of high reflectivity mirrors for ePIC, as well as a novel R&D effort to redefine multi-wire drift chambers (MWDC) technology using coated carbon fiber wires.
The Proximity Focusing RICH (pfRICH) detector is a key sub-system fur particle identification (PID) at ePIC. It sits about 1.2 m from the interaction point in the electron-going direction, covering $-3.5 < \eta < -1.5$ in pseudorapidity and full $2\pi$ in azimuth. It will be primarily used for identification of scattered electrons from deep inelastic scattering (DIS) events, as well as for...
Transverse Momentum Dependent Parton Distribution Functions (TMDPDFs) provide crucial insights into the three-dimensional structure of hadrons and can be extracted from processes involving multiple kinematic scales, including Drell-Yan (DY), Semi-Inclusive Deep Inelastic Scattering (SIDIS), and $e^+e^-$ annihilation. Deep Neural Networks (DNNs) have emerged as powerful tools for information...
AstroPix is a high-voltage CMOS (HV-CMOS) monolithic silicon sensor and a key component of the Barrel Imaging Calorimeter (BIC) for the ePIC experiment, alongside the lead/scintillating-fiber (Pb/SciFi) sampling calorimeter. Interleaved within the calorimeter layers, AstroPix provides fine-grained shower imaging, enabling critical performance capabilities such as electron/pion or gamma/pion...
The proximity-focused Ring Imaging Cherenkov (pfRICH) detector plays a critical role in particle identification for the ePIC experiment. A laser-based monitoring system is being developed to ensure precise and reliable calibration throughout its operation. This system serves two key functions: measuring single-photon timing resolution (targeting <100 picoseconds) for precise time-of-flight...
The Electron-Ion Collider (EIC) will be the next major facility to study the smallest building blocks of matter and their interactions. This facility will collide spin-polarized electrons and nuclei, thus providing new opportunities to study the spin structure of nucleons. Given the expected performance of the facility, we simulated polarized electron-proton and electron-Helium 3 collisions...
The structure of quarks inside a nucleon is affected by its polarization. This effects can be investigated throught the extraction of the TMD Sivers distribution from DY, SIDIS measurements.
Sartre is an event-generator based on the color dipole model of deep inelastic scattering (DIS). It employs the Good-Walker mechanism to simulate event-by-event fluctuations, which are key to describing the incoherent cross section, where the target breaks up following the interaction. Sartre has been extensively used to describe photon–nucleus interactions at the Electron-Ion Collider (EIC),...
Two processes contribute to the $ep \rightarrow e' p' \gamma'$ reaction: Deeply Virtual Compton Scattering, where the photon is produced at the proton vertex, and the Bether-Heitler process, where the photon is radiated from the electron. A major hurdle in the extraction of Generalised Form Factors (GPDs) from experiment arises due to the presence of two Inverse problems: a first one for the...
Key measurements at the future Electron-Ion Collider (EIC), including first-of-their-kind studies of kaon structure, require the detection of $\Lambda^0$ at forward angles. We present a feasibility study of $\Lambda^0 \rightarrow n\pi^0$ measurements using a high-granularity Zero Degree Calorimeter to be located about 35 m from the interaction point. We introduce a method to address the...
The SiPM-on-Tile technology was adopted by several calorimetry systems
of ePIC, including the forward and backward hadronic calorimeters (1.5 < η <
3.0), the high granularity insert (3.0 < η < 4.0) and the Zero-Degree Calorime-
ter (ZDC, η > 6.0). We developed a ZDC prototype to validate the design and
evaluate its performance with low-energy particles. Beam tests conducted at
Jefferson...
The Electron-Ion Collider (EIC) is a next-generation facility designed to investigate the gluonic structure of nucleons and nuclei via Deep Inelastic Scattering. The EIC physics program, outlined in the EIC White Paper and Yellow Report, led to the development of the general-purpose ePIC detector. To enhance the scientific reach of the EIC, the community supports the addition of a second...
This talk presents a cutting-edge analysis of the 1-jettiness event shape in deep inelastic scattering (DIS), utilizing Soft-Collinear Effective Theory. The study achieves high precision at N$^3$LL + O($\alpha_s^2$) accuracy, incorporating full fixed-order matching along with nonperturbative corrections. It represents one of the most accurate event-shape predictions in DIS to date and supports...
