Bulletin of the American Physical Society
2021 Fall Meeting of the APS Division of Nuclear Physics
Volume 66, Number 8
Monday–Thursday, October 11–14, 2021; Virtual; Eastern Daylight Time
Session PH: Mini-Symposium: Advances in EIC eA Science Using RHIC and the LHC |
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Chair: Peter Steinberg, Brookhaven National Laboratory Room: Whittier |
Thursday, October 14, 2021 9:30AM - 10:06AM |
PH.00001: Probing collectivity in small collisional systems at RHIC, LHC and EIC Invited Speaker: Bowen Xiao This presentation will first review and discuss several interesting and peculiar aspects of collective phenomena discovered in small collisional systems at RHIC and the LHC. Furthermore, I will show that there is a strong physical resemblance between the high multiplicity events in photo-nuclear collisions and pA collisions due to rare fluctuations in quantum field theories. This implies that collectivity phenomena may also be observed in certain kinematic regions of the upcoming EIC thanks to photons' possible rich QCD structure. |
Thursday, October 14, 2021 10:06AM - 10:18AM |
PH.00002: Exclusive dijet studies at the LHC and the eA science program Daniel Tapia Takaki In this talk, we will discuss the impact of recent measurements of exclusive dijet production at LHC for the eA science program at the EIC. In particular, we will discuss the observation of the angular decorrelation of exclusive dijets in ultra-peripheral PbPb collisions measured with the CMS detector. Special attention will be given to the various physics interpretations and how this process is relevant for studies of nuclear gluon densiy, and quantum entanglement. We will also discuss the prospects of color transparency measurements using hard exclusive dijets at the LHC and the synergies with the EIC physics program. |
Thursday, October 14, 2021 10:18AM - 10:30AM |
PH.00003: Identification of Pions, Kaons, and Protons in Photonuclear Events at STAR Nicole A Lewis In heavy ion collisions, a photonuclear event occurs when one ultrarelativistic nucleus emits a photon which collides with the other intact nucleus, similar to an e + A collision except that the photon tends to have a much smaller virtuality. Comparing particle spectra from these γ + A events to observations in A + A collisions will allow us to distinguish between what effects come from nuclear structure and what effects are from the medium. These measurements are done at the STAR experiment for Au + Au data with √sNN = 54 GeV and will show the π, K, and p spectra as a function of both pT and η. Measurements of particle spectra in photonuclear events will help inform future measurements using particle identification at the EIC. |
Thursday, October 14, 2021 10:30AM - 10:42AM |
PH.00004: Explore hadronization through heavy flavor probes at 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 hadrons in electron+proton and electron+nucleus collisions access different kinematic coverages from light flavor hadrons. Such measurement at the future EIC will provide a unique path to explore the flavor dependent fragmentation function and energy loss mechanism in heavy nuclei, which can constrain the initial state effects for previous and ongoing heavy ion measurements at Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). Heavy flavor hadron and jet reconstruction has been obtained in simulation with recent EIC detector design and performance evaluated in GEANT4. Corresponding physics projections such as the flavor dependent hadron nuclear modification factor in electron+nucleus collisions will be discussed in this presentation. |
Thursday, October 14, 2021 10:42AM - 10:54AM |
PH.00005: Gluon saturation at hadronic colliders: a modern review Astrid Morreale, Farid Salazar Wong The non-abelian character of QCD manifests in nature in the form of two remarkable properties: color confinement and asymptotic freedom. The latter property allows for the use of perturbation theory and has led to the successful description of a plethora of experiments across different high-energy colliders. The majority of these theoretical predictions rely on the collinear factorization framework, where partonic matrix elements are obtained in perturbation theory and are convoluted with universal parton distribution functions (PDFs) that obey the DGLAP renormalization group equation. |
Thursday, October 14, 2021 10:54AM - 11:06AM |
PH.00006: Jet Measurements with the ECCE Detector at the Electron-Ion Collider Tristan L Protzman The ECCE experiment is a proposed detector for the upcoming Electron-Ion Collider at Brookhaven National Laboratory. Based around the sPHENIX detector, it will feature electromagnetic and hadronic calorimetry as well as particle tracking and identification, enabling a detailed study of jets in ep and eA collisions. Using jets, the partonic structure of the nucleon can be examined, as jets are correlated with the partons which form them. Additionally, the structure of jets offers clues into the hadronization process, which is still not well understood. To achieve these physics goals, the detector's momentum and spatial resolution of jets must be sufficiently good. Using Pythia and Geant4 simulations, the scale and resolution of jet measurements can be studied, demonstrating the detector's capability. Performance will be examined at mid-rapidity and the forward region, and the capabilities of various subsystems in isolation will be presented. Finally, the efficiency of jet reconstruction will be discussed. |
Thursday, October 14, 2021 11:06AM - 11:18AM |
PH.00007: Exploring femtoscopy as a measurement tool for ultra-peripheral collisions Christopher D Anson Femtoscopy provides a powerful, precision tool for extracting spatiotemporal information about ultra-relativistic nuclear collisions. In ultra-peripheral collisions, vector meson photoproduction probes gluon distributions of the interacting nuclei. This work explores the potential for investigating gluon distributions through application of the femtscopic toolkit to double vector meson photoproduction events. |
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