Conveners
Presentation Session: e+A Diffractive Processes
- Jackson Pybus (MIT)
Presentation Session: Jets and Baryon Production
- Charlotte Van Hulse (IJCLab)
Presentation Session: Interesting Tools and Ultilities
- Wenliang Li (College of William and Mary)
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Anh Dung Le (CPHT, CNRS Ecole Polytechnique, IP Paris)7/29/21, 12:35 PM
We study the diffractive dissociation of a virtual photon in the scattering off a large nucleus at high energies in the QCD dipole picture in which the photon is conveniently represented by an onium. In a well-defined parametric regime, the nuclear scattering of the onium is triggered by large-dipole fluctuations in the course of its rapidity evolution in the form of color dipole branching,...
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Dien Nguyen (MIT)7/29/21, 12:50 PM
The spin structure function of the neutron is traditionally determined by measuring the spin asymmetry of inclusive electron deep inelastic scattering (DIS) off polarized 3He nuclei. In such experiments, nuclear corrections are significant and must be treated carefully in the interpretation of experimental data. Here we study the feasibility of suppressing model dependencies by tagging both ...
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Dr Jennifer Rittenhouse West (Berkeley Lab and the EIC Center at Jefferson Lab)7/29/21, 1:05 PM
Quantum chromodynamics degrees of freedom are proposed to explain various puzzling results in nuclear physics. The 1983 EMC experiment discovery of unexpected quark behavior in nuclei has been investigated in great depth both experimentally and theoretically since that time. The viability of quark-quark bonds across nucleons provides an explanation for unusual quark behavior when the quark...
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Medani Sangroula (Brookhaven National Laboratory)7/29/21, 1:20 PM
The Electron-Ion Collider (EIC) to be built at Brookhaven National Laboratory is a high luminosity accelerator facility colliding polarized electron beam with different ion species ranging from lighter nuclei (proton, deuterium) to heavier nuclei (gold, uranium). Design of a stripline injection kicker for the Hadron Storage Ring (HSR) of EIC for beams with beam rigidity of 81 T-m poses some...
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Haowu Duan (North Carolina State University)7/30/21, 12:10 PM
To study quantum properties of the hadron wavefunction at small x, we derived the reduced density matrix for soft gluons in the CGC framework. We explicitly showed that the reduced density matrix is not diagonal in the particle number basis. The off-diagonal components are usually ignored in the conventional parton model. We thus defined the density matrix of ignorance by keeping only the part...
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Yair Mulian (Jyvaskyla University)7/30/21, 12:25 PM
Using the CGC effective theory together with the hybrid factorisation, we study forward dijet production in proton-nucleus collisions beyond leading order. In this paper, we compute the "real" next-to-leading order (NLO) corrections, i.e. the radiative corrections associated with a three-parton final state, out of which only two are being measured. To that aim, we start by revisiting our...
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Fanyi Zhao (UCLA)7/30/21, 12:40 PM
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. In particular, we provide the general theoretical framework for studying the distribution of hadrons inside a jet by taking full advantage of the...
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Yuan-Yuan Zhang (CCNU)7/30/21, 12:55 PM
Large angle gluon radiations induced by multiple parton scatterings contribute to dijet production in deeply inelastic scattering off a large nucleus at the Electron-Ion Collider. Within the generalized high-twist approach to multiple parton scattering, such contributions at the leading order in perturbative QCD and large Bjorken momentum fraction $x_B$ can be expressed as a convolution of the...
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Yuanjing Ji7/30/21, 1:10 PM
In high energy collisions, heavy quarks (c, b) are predominately produced in the initial hard scattering process. The relative ratio of different heavy flavor hadrons species serves as a tool to study charm quark hadronization mechanism. Recently, data from $p$+$p$, $p$+A, and A+A collisions at RHIC and LHC showed that the $\Lambda_c^+/D^0$ ratio is considerably larger than the fragmentation...
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Sean Preins (University of California Riverside)7/30/21, 1:30 PM
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Abdullah Farhat (Old Dominion University)7/30/21, 1:45 PM
We studied the use of machine learning to reconstruct deep inelastic scattering (DIS) kinematics. In particular, we trained deep neural networks to reconstruct $x$ and $Q^2$ based on information from the lepton and the hadronic system in ep scattering at the ZEUS experiment at HERA. These models were trained by a careful selection of Monte Carlo events. The results from the neural networks...
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Eric Moffat (Old Dominion University)7/30/21, 2:00 PM
We present the results of a comprehensive new Monte Carlo analysis of high-energy lepton-lepton, lepton-hadron and hadron-hadron scattering data to simultaneously determine parton distribution functions (PDFs) in the proton and parton to hadron fragmentation functions (FFs).
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Weiyao Ke (University of California, Berkeley; Lawrence-Berkeley National Lab)7/30/21, 2:15 PM
DIS in electron-ion collisions provides detailed information on nuclear parton distribution and the partonic dynamics and hadronization in the cold nuclear matter. A general-purpose event generator that accounts for in-medium parton dynamics in DIS benefits both phenomenological study and experimental design. In the eHIJING-1.0 model currently under development, we use Pythia8 to generate...
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Wenliang Li (William & Mary)