Bulletin of the American Physical Society
2020 Fall Meeting of the APS Division of Nuclear Physics
Volume 65, Number 12
Thursday–Sunday, October 29–November 1 2020; Time Zone: Central Time, USA
Session LQ: Mini-Symposium: U.S.-based Electron-Ion Collider: Physics and Detectors II |
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Chair: Matt Posik, Temple University |
Saturday, October 31, 2020 10:30AM - 11:06AM |
LQ.00001: Jets for 3D imaging Invited Speaker: Miguel Arratia The EIC will produce the first-ever jets in DIS off polarized protons, so it will have the potential for a truly unique jet program. In this talk, I will focus on the prospects of using jets to study the 3D-imaging of the proton. I will discuss the experimental feasibility of measurements such as electron-jet and neutrino-jet correlations, jet fragmentation, and jet substructure. I will present statistical projections and predictions for jet-based measurements of Sivers and Collins asymmetries. I will discuss requirements for the EIC detectors. I will argue that a jet program at the EIC could unleash a new era in the field of 3D imaging of the nucleon. [Preview Abstract] |
Saturday, October 31, 2020 11:06AM - 11:18AM |
LQ.00002: Charm production in charged current deep inelastic scattering at EIC Jae Nam The recently-announced U.S.-based Electron-Ion Collider (EIC) is projected to facilitate polarized $eA$ collisions at center-of-mass energies of $\sqrt{s} = 141 GeV$ at the largest $ep$ energy mode and $\sqrt{s} = 104 GeV$ at the highest luminosity mode. The polarized electron beam would provide a unique opportunity to study the inner-structure of the proton and atomic nucleus. Recent studies show that $s(x,Q2)$ and $\Delta s(x,Q2)$ can be probed via charm production in charged current DIS (CCDIS). We discuss the feasibility of such investigation in EIC in a Monte Carlo study by extrapolating charm production cross section and yield based on recent ZEUS measurements. [Preview Abstract] |
Saturday, October 31, 2020 11:18AM - 11:30AM |
LQ.00003: Charm jets as a probe for strangeness at the future Electron-Ion Collider Stephen Sekula, Miguel Arratia, Yulia Furletova, Timothy Hobbs, Fred Olness We explore the feasibility of the measurement of charm-jet cross sections in charged-current deep-inelastic scattering at the future Electron-Ion Collider. This channel provides clean sensitivity to the strangeness content of the nucleon in the high-$x$ region. We estimate charm-jet tagging performance with parametrized detector simulations. We show the expected sensitivity to various scenarios for strange parton distribution functions. We argue that this measurement will be key to future QCD global analyses, so it should inform EIC detector designs and luminosity requirements. This work is summarized in arXiv:2006.12520 (https://arxiv.org/abs/2006.12520). [Preview Abstract] |
Saturday, October 31, 2020 11:30AM - 11:42AM |
LQ.00004: Polarized jet fragmentation functions Fanyi Zhao, Zhong-Bo Kang, Kyle Lee The internal structure of jets has been an active research topic in QCD in recent years. In this talk, we propose to use one particular jet substructure - so-called jet fragmentation function to study spin-dependent distribution and dynamics. In particular, we provide the general theoretical framework for studying the distribution of hadrons inside a jet by taking full advantage of the polarization effects. The key development referred to as "polarized jet fragmentation functions", opens up new opportunities to study both collinear and transverse momentum dependent (TMD) fragmentation functions via jets. Besides providing the theoretical understanding for the well-known Collins asymmetry for hadron in the jet, we also give two additional examples involving polarization of Lambda baryons inside the jet at both RHIC/LHC and the future Electron-Ion Collider. [Preview Abstract] |
Saturday, October 31, 2020 11:42AM - 11:54AM |
LQ.00005: Unraveling the Proton's High-$x$ Structure with the EIC Timothy Hobbs The problem of disentangling the $x$ and flavor dependence of the nucleon's valence-region parton distribution functions (PDFs) has received great attention in recent years, owing especially to the ongoing JLab 12 GeV program as well as activities at the LHC and elsewhere. This effort will only accelerate in the coming years in anticipation of the eventual science program of the Electron-Ion Collider (EIC), which will possess extensive resolving power in the high-$x$ region. In this talk, I will review our present understanding of the nucleon's unpolarized PDFs at high $x$ with a focus on the phenomenological implications thereof. Going forward, I will highlight the prospect for the EIC to drastically clarify our picture of the nucleon at high $x$ in the context of its broader program in hadronic tomography and precision QCD. [Preview Abstract] |
Saturday, October 31, 2020 11:54AM - 12:06PM |
LQ.00006: Open heavy flavor and jet studies for the future Electron-Ion Collider Xuan Li The proposed high luminosity high energy Electron-Ion Collider (EIC) will provide a clean environment to precisely study the nuclear modification of the nuclear parton distribution functions (nPDFs) and hadronization processes within a wide x-$Q^{2}$ phase space. Heavy flavor hadron and jet measurements at the future EIC will allow us to better determine the nPDFs in the poorly constrained high Bjorken-x region and provide enhanced sensitivities to the nuclear transport properties in medium. We propose to develop a new physics program to study the flavor tagged hadrons/jets, heavy flavor hadron-jet correlations and flavor dependent jet fragmentation processes in the nucleon/nucleus going direction (forward region) at the EIC. These proposed measurements will provide a unique path to explore the flavor dependent fragmentation functions and energy loss in heavy nuclei, which can constrain the initial state effects for previous and ongoing heavy ion measurements. A forward (proton/nuclei going direction) silicon tracking detector is essential to carry out these measurements at the EIC. Details of the proposed new physics program, progresses of the detector and physics simulation studies and the status of the detector R$\&$D will be discussed in this presentation. [Preview Abstract] |
Saturday, October 31, 2020 12:06PM - 12:18PM |
LQ.00007: All-silicon tracker resolution studies for the Electron Ion Collider (EIC) Reynier Cruz Torres The Electron Ion Collider (EIC) has prompted the physics community to determine which detector technologies and designs are preferred for this facility's physics program. This program will require a hermetic, compact, low-material-budget tracker with excellent momentum, angular, and vertex resolutions, as well as aid in particle identification (PID). One of the candidate technologies that can satisfy these requirements are semiconductor detectors. We have studied an all-silicon tracker prototype using the Fun4All full-simulation package, which has been adopted by the EIC User Group. This tracker covers an acceptance of $|\eta|<4$ and $0\le\phi\le2\pi$, and satisfies the projected material-budged requirements of the EIC. Momentum and angular resolutions were studied for pions, muons, electrons, and jets. Jets were generated from electron-proton collisions using the PYTHIA 8 event generator. The remaining particles from the study were generated using a single-particle gun. The resolutions were studied up to momenta of 25 GeV$/c$ with different magnetic-field configurations, both at the collision vertex and also at PID-detector locations. We find momentum resolutions better than $3\%$ and polar-angle resolutions of less than 1 mrad at $|\eta|<3$, which satisfy the EIC requirements. [Preview Abstract] |
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