Bulletin of the American Physical Society
APS April Meeting 2021
Volume 66, Number 5
Saturday–Tuesday, April 17–20, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session B12: Jet Physics at the EIC – ILive Mini-Symposium
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Sponsoring Units: DNP Chair: Felix Ringer, LBNL |
Saturday, April 17, 2021 10:45AM - 11:21AM Live |
B12.00001: The Ultimate QCD Microscope: An Overview of Jet Physics at the EIC Invited Speaker: Brian Page The goal of the future Electron-Ion Collider (EIC) is to gain a more complete understanding of the QCD dynamics that give rise to the properties of all nucleons and nuclei. This ambitious program will be made possible both by the superior performance of the machine, and by a diverse set of physical observables and related theoretical frameworks. Over the past several years, there has been a growing recognition that jets will be an important addition to this toolbox of observables and give insights into all facets of the EIC physics program. This talk will provide an overview of jet physics as it pertains to the EIC and highlight several results from the recently completed EIC User Group Yellow Report, which details specific jet measurements and the detector requirements needed to realize a successful EIC jet program. Some thoughts on future directions and opportunities will also be presented. [Preview Abstract] |
Saturday, April 17, 2021 11:21AM - 11:33AM Live |
B12.00002: Connecting jet substructure to hadronization at the EIC Mriganka Mouli Mondal, Miguel Arratia , Yang-Ting Chien, Abhay Deshpande , Roli Esha, Henry Klest, Raghav Kunnawalkam, Sean Preins , George Sterman , Jinlong Zhang EIC provides a unique laboratory for a precise study of both perturbative and non-perturbative QCD. Jets are multi-scale objects which inherently contain information related to time-evolution of QCD matter from short to long distances scales. Utilizing the Center-of-Mass Energy (CMS) variability in the EIC $\&$ the PID capabilities of the EIC detectors, one can study hadronization within jets in a wide kinematic regime by characterizing the x and $Q^2$ scales of the process. We propose a new class of jet substructure observables constructed with identified leading and first subleading particles within jets (for example, poni-pion). Comparing numbers of events where their electric charges are of the same sign ($N_{CC}$) or opposite sign ($N_{C\overline{C}}$), we define an asymmetry observable by $r = (N_{CC} N_{C\overline{C}})/(N_{CC}+N_{C\overline{C}})$ as functions of jet observables. These include the formation time extracted from the two leading particle kinematics, which gives information on the space-time evolution of jets. We will show how the multi-differential charged correlations for identified particle species are sensitive for various MC event generators at EIC to HERA center of mass energies. [Preview Abstract] |
Saturday, April 17, 2021 11:33AM - 11:45AM Live |
B12.00003: Jet fragmentation functions at the EIC Fanyi Zhao, Zhong-Bo Kang, Kyle Lee, Ding Yu Shao 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 - the so-called jet fragmentation function to study spin-dependent distribution and dynamics at a future Electron-Ion Collider (EIC). In particular, we provide the general theoretical framework for studying the distribution of hadrons inside a jet by taking full advantage of the transverse-momentum-dependent distributions and polarization effects. The key development referred to as "polarized jet fragmentation functions", opens up new opportunities to study transverse momentum dependent (TMD) fragmentation functions via jets. We provide theoretical formalism and detailed phenomenology for studying these TMD functions at the future EIC. [Preview Abstract] |
Saturday, April 17, 2021 11:45AM - 11:57AM Live |
B12.00004: Feasibility studies of neutrino-jet and hadron-in-jet azimuthal modulations in charged-current DIS at the EIC Sebouh Paul We explore the potential of charged-current measurements at the Electron-Ion Collider to gain flavor sensitivity for the 3D imaging of the nucleon. In particular, we focus on the prospects of neutrino-jet azimuthal correlations, which probe the Sivers effect, and hadron-in-jet measurements, which probe the Collins effect and quark transversity. We project the kinematic reach and precision of these measurements and study their feasibility using parameterized detector simulations with the Delphes program. [Preview Abstract] |
Saturday, April 17, 2021 11:57AM - 12:09PM Live |
B12.00005: A Feasibility Study for Diffractive Dijet Measurements at the Electron-ion-collider Latiful Kabir Diffractive processes have been identified as the golden tool to study several key physics programs at the Electron-Ion-Collider (EIC), including a study of the spatial structure of nucleons and nuclei, access the orbital motion of small-x partons inside the proton, and to study saturation in nuclei. Diffractive dijet measurements at the EIC could add unique physics opportunities to other jet measurements at the EIC. In this study, using PYTHIA8 event generator and DELPHES fast-simulation, we explored the feasibility and detector requirements for diffractive dijet measurements at the EIC. [Preview Abstract] |
Saturday, April 17, 2021 12:09PM - 12:21PM Live |
B12.00006: Q/G Tagged Dijet Search and Calibration Wanyun Su The energy regime provided by the Large Hadron Collider using an integrated luminosity of 139.0 fb-1 of proton--proton collisions with a centre-of-mass energy o \newline s = $\surd $13 TeV opens a window to search for new physics beyond the standard model (BSM). Heavy resonance searches through the dijet mass spectrum have been previously performed at the ATLAS. \newline While untagged searches have a good sensitivity to strongly produced particles that decay into generic dijets with large cross sections, gluon taggers, in particular Number of charged tracks (Ntrk) and Boosted Decision Trees (BDT) can improve the discovery significance of di-gluon resonances \newline However, quark-versus-gluon jet tagging is difficult to calibrate due to hadronization.Thus, a "matrix \newline method" is applied to calibrate both NTrk and BDT taggers. Ntrk is further applied to show improvement on discovery significance. The Impact of systematic uncertainties derived from the calibration procedure will also be shown. [Preview Abstract] |
Saturday, April 17, 2021 12:21PM - 12:33PM Live |
B12.00007: Energy Loss in Deep Inelastic Di-Hadron Production Using the Color Glass Condensate Formalism Filip Bergabo, Jamal Jalilian-Marian Recent studies have found away-side peak suppression in produced particle correlations in $pA$ collisions when compared to $pp$ collisions. Possible causes of this suppression include gluon shadowing and energy loss. Energy loss is a result of radiation carrying away a portion of the parton’s energy, and can be computed as the difference of the ratio of cross sections between a nucleus target and a proton target. We expect that similar peak suppression will be found in deep inelastic scattering experiments, so it is important to predict the contribution to this suppression from both gluon shadowing and energy loss. Here we calculate the energy loss in a deep inelastic collision of an electron and a heavy nucleus that produces a pair of hadrons in the final state. The energy loss is also part of the real next-to-leading order corrections to deep inelastic di-hadron production. We model the heavy nucleus as a classical background field using the color glass condensate effective theory of QCD. [Preview Abstract] |
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