Paper Title Number 4
Published in GitHub Journal of Bugs, 2024
This paper is about fixing template issue #693.
Recommended citation: Your Name, You. (2024). "Paper Title Number 3." GitHub Journal of Bugs. 1(3).
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publications
Parameterization of Quark and Gluon Generalized Parton Distributions in a Dynamical Framework Permalink
Published in Physical Review D, 2021
Presented a parametrization of the chiral even generalized parton distributions, H, E, H^˜, E^˜, for the quark, antiquark, and gluon, in the perturbative QCD-parton framework.
Recommended citation: Kriesten, B., Velie, P., Yeats, E., Lopez, F. Y., & Liuti, S. (2022). Parametrization of quark and gluon generalized parton distributions in a dynamical framework. Physical Review D, 105(5), 056022.
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A bijection for tuples of commuting permutations and a log-concavity conjecture
Published in Research in Number Theory, 2023
We provide a new proof of an explicit formula for A(p, n, k) which is essentially due to Bryan and Fulman, in their work on orbifold higher equivariant Euler characteristics.
Recommended citation: Abdesselam, A., Brunialti, P., Doan, T., & Velie, P. (2024). A bijection for tuples of commuting permutations and a log-concavity conjecture. Research in Number Theory, 10(2), 45.
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Precision calibration of calorimeter signals in the ATLAS experiment using an uncertainty-aware neural network
Published in ArXiv, 2024
Application of deep neural networks for the use of calibrating the topological cell clusters in the ATLAS calorimeters. The goal of improve the calibration of the cluster energy to the true energy at low energies.
Recommended citation: ATLAS Collaboration. (2024). Precision calibration of calorimeter signals in the ATLAS experiment using an uncertainty-aware neural network. arXiv preprint arXiv:2412.04370.
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talks
A Flexible Parametrization to Compute Chiral-Even Generalized Parton Distributions
Published:
Imaging the 3D structure of the nucleon is a fundamental goal of every major nuclear physics program. With the rapid development of deeply virtual Compton scattering experiments spanning unprecedented kinematic regimes, there is a need for flexible models of generalized parton distribution functions (GPDs) to place constraints on experimental observables. The proposed low-x electron-ion collider (EIC) kinematic settings are dominated by gluon dynamics; therefore, modelling sea quark and gluon GPDs is crucial. We are developing flexible GPD models of the nucleon glue and sea using a spectator diquark model where we fit the momentum transfer dependence to lattice QCD calculations of the gravitational form factors. Through Fourier transform of the momentum transfer variable t, we can develop femtographic images of the transverse spatial dependence of the glue and sea in the nucleon as it would appear at an EIC.
Imaging the Nuclear Glue and Sea
Published:
Imaging the 3D structure of the nucleon is a fundamental goal of every major nuclear physics program. With the rapid development of deeply virtual Compton scattering experiments spanning unprecedented kinematic regimes, there is a need for flexible models of generalized parton distribution functions (GPDs) to place constraints on experimental observables. The proposed low-x electron-ion collider (EIC) kinematic settings are dominated by gluon dynamics; therefore, modelling sea quark and gluon GPDs is crucial. We are developing flexible GPD models of the nucleon glue and sea using a spectator diquark model where we fit the momentum transfer dependence to lattice QCD calculations of the gravitational form factors. Through Fourier transform of the momentum transfer variable t, we can develop femtographic images of the transverse spatial dependence of the glue and sea in the nucleon as it would appear at an EIC.
Optimized Extraction of Generalized Parton Distributions from Deeply Virtual Compton Scattering
Published:
Generalized Parton Distributions (GPDs) are a powerful tool that allows greater insight into the internal structure of the nucleon. GPDs define the matrix elements for the deeply virtual Compton scattering (DVCS) process. I will first present a spectator model calculation for the quark, anti-quark and gluon chiral even GPDs H,E,H˜,E˜ in terms of the kinematic variables X, ζ, and t. The model implements the polynomiality and positivity constraints, and it is evolved in perturbative QCD up to next to leading order. I will then illustrate the implementation of computer tensor algebra methods to construct algorithms to optimize the analysis for DVCS, Bethe Heitler, and interference cross-section terms for various beam and target polarization.
Parameterization of Chiral Even Quark and Gluon Generalized Parton Distributions
Published:
We present a parametrization of the chiral even generalized parton distributions, H, E, H˜, E˜, for the quark, antiquark and gluon, in the perturbative QCD-parton framework. Parametric analytic forms are given as a function of two equivalent sets of variables x,ξ,t (symmetric frame) and X,ζ,t (asymmetric frame), at an initial scale, Q2o. In the X>ζ region a convenient and flexible form is obtained as the product of a Regge term ∝X−α+α′t, describing the low X behavior, times a spectator model-based functional form depending on various mass parameters; the behavior at X<ζ, is determined using the generalized parton distributions symmetry and polynomiality properties. The parameters are constrained using data on the flavor separated nucleon electromagnetic elastic form factors, the axial and pseudoscalar nucleon form factors, and the parton distribution functions from both the deep inelastic unpolarized and polarized nucleon structure functions. For the gluon distributions we use, in particular, constraints provided by recent lattice QCD moments calculations. The parametrization’s kinematical range of validity is: 0.0001≤X≤0.85, 0.01≤ζ≤0.85, 0≤−t≤1 GeV2, 2≤Q2≤100 GeV2. With the simultaneous description of the quark, anti-quark and gluon sectors, this parametrization represents a first tool enabling a global QCD analysis of deeply virtual exclusive experiments.
teaching
PHYS7610 Quantum Theory I (Graduate Quantum Mechanics) Teaching Assistant
Graduate course, University of Virginia, Physics Department, 2021
Assisted the professor in carrying out the Graduate Quantum Mechanics by grading all assignments promptly. Held office hours to supplement the student’s learning
PHYS3660 Quantum Physics II Teacher Assistant
Undergraduate Course, University of Virginia, Physics Department, 2022
Assisted the professor in carrying out the Undergraduate Quantum Mechanics course by grading all assignments on time. Held office hours to supplement the student’s learning
PHYS5720 Graduate Nuclear and Particle Physics Teaching Assistant
Graduate course, University of Virginia, Physics Department, 2022
Assisted the professor in carrying out the Graduate Nuclear and Particle Physics course by grading all assignments promptly. Held office hours to supplement the student’s learning
PHYS2660 Fundamentals of Scientific Computing Teaching Assistant
Undergraduate course, University of Virginia, Physics Department, 2022
Assisted in the laboratory section of Undergraduate Computational Physics by answering questions and guiding students through assignments. Graded student assignments on time
PHYS8710 Graduate Nuclear Physics I Teaching Assistant
Graduate course, University of Virginia, Physics Department, 2023
Taught several classes while the professor was absent. Lead a weekly journal club in tandem with the graduate students enrolled in the course. Assisted the professor in carrying out the course by grading all assignments on time. Held office hours to supplement the student’s learning
PHYS2620 Modern Physics Teaching Assistant
Undergraduate course, University of Virginia, Physics Department, 2023
Assisted the professor in carrying out the Modern Physics course by grading all assignments on time. Held office hours to supplement the student’s learning
PHYS212 Physics 2 Teaching Assistant
Undergraduate course, Pennsylvania State University, Physics Department, 2024
Assisted in the laboratory and recitation section of Undergraduate Physics 2 by answering questions and guiding students through assignments. Graded student recitations and labs on time.
PHYS212 Physics 1 Teaching Assistant
Undergraduate course, Pennsylvania State University, Physics Department, 2025
Assisted in the laboratory and recitation section of Undergraduate Physics 2 by answering questions and guiding students through assignments. Graded student recitations and labs on time.