Andrew J. R. Puckett, Associate Professor, Department of Physics
Professor Puckett is an experimental nuclear/particle physicist studying the internal structure of strongly interacting matter in high-energy fixed-target electron-nucleon and electron-nucleus scattering experiments at Jefferson Lab (JLab). The recently completed 12 GeV upgrade of JLab's Continuous Electron Beam Accelerator Facility to a maximum beam energy of 11 GeV (12 GeV) for electron-beam (photon-beam) experiments, augmented by state-of-the-art target and detector systems, will enable a world-leading physics program leading to three-dimensional imaging of the internal quark structure of protons, neutrons and nuclei with unprecedented precision in both coordinate and momentum space. The ultimate goal of the experiments is to understand how strongly interacting matter is built from its elementary quark and gluon constituents in terms of Quantum Chromodynamics, the theory of the strong interaction. Click the image to see the list of publications and citations (according to Google Scholar)
Recent news/events
Proton radius puzzle apparently resolved…
The PRAD collaboration recently published their results on very low Q2 electron-proton scattering in Hall B at Jefferson Lab, extracting a proton charge radius of rp = 0.831 ± 0.007 (stat) ± 0.012 (syst) fm, consistent with the precise extraction of this quantity from measurements of the Lamb shift in muonic hydrogen, first published in […]
[Read More]Professor Puckett gives invited talk at ECT* “Diquark” Workshop
Professor Puckett is attending and presenting an invited talk at the workshop “Diquark Correlations in Hadron Physics” at the European Center for Theoretical Studies in Nuclear Physics and Related Areas (ECT*) in Trento, Italy, during the week of Sept. 23-27. The webpage and program of the workshop can be found at the following link.
[Read More]First paper from Tritium family of experiments in Hall A published
The first paper from the recently completed family of tritium target experiments in JLab’s Hall A is now published in Physics Letters B. The final published version of the paper can be found online at https://doi.org/10.1016/j.physletb.2019.134890 The INSPIRE-HEP database entry for the paper can be found at http://inspirehep.net/record/1720567 The paper reports the first measurement of […]
[Read More]Physics Department Upcoming Events
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Apr
10
Condensed Matter Physics Seminar9:00am
Condensed Matter Physics Seminar
Friday, April 10th, 2020
09:00 AM - 10:00 AM
Storrs Campus online
Prof. L. Levitov, Department of Physics, MIT
Long-Lived Excitations, Directional Memory and Hydrodynamic Transport in Two-Dimensional Electron Fluids
It was found recently that 2D electron fluids can support collective excitations that are not subject to Landau's \(T^2\) dissipation [1,2,3]. This surprising behavior originates from the head-on carrier collisions, a process that dominates angular relaxation at not-too-high temperatures \(T \ll T_F\) due to the joint effect of Pauli blocking and kinematic constraints. As a result, a large family of exceptionally long-lived excitations emerges, associated with the odd-parity harmonics of momentum distribution. This leads to "tomographic" dynamics: fast 1D spatial diffusion along the unchanging velocity direction accompanied by a slow angular dynamics that gradually randomizes velocity orientation. The abnormally slow angular relaxation originates from correlated angular dynamics involving "lock-step'' angular displacements along the Fermi surface occurring in collinear two-particle collisions. The slow loss of directional memory is described as non-Brownian angular random walk, "superdiffusion" on the Fermi surface. The collective behavior with directional memory dominates at moderately long times, pushing the onset of conventional hydrodynamics to abnormally large timescales. The tomographic regime features an unusual hierarchy of time and length scales, resulting in scale-dependent transport coefficients. The scale dependence manifests itself in fractional-power current flow profiles and unusual conductance scaling vs. temperature and sample size. This exotic behavior can be directly probed by transport measurement techniques, as well as by momentum-resolved tunneling measurements.
1. P J Ledwith, H Guo, L Levitov, The Hierarchy of Excitation Lifetimes in Two-Dimensional Fermi Gases,
Annals of Physics 411, 167913 (2019)
2. P J Ledwith, H Guo, A V Shytov, L Levitov,
Tomographic Dynamics and Scale-Dependent Viscosity in Two-Dimensional Electron Systems,
Phys Rev Lett 123, 116601 (2019)
3. P J Ledwith, H Guo, L Levitov, Angular Dynamics and Directional Memory in Two-Dimensional Electron Fluids,
2019
Zoom Meeting: https://kth-se.zoom.us/j/123036826Contact Information: Prof. A. Balatsky.
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Apr
10
Physics Colloquium (Prof. Sang-Wook Cheong)3:30pm
Physics Colloquium (Prof. Sang-Wook Cheong)
Friday, April 10th, 2020
03:30 PM - 04:30 PM
Storrs Campus BPB 131
Prof. Sang-Wook Cheong, Rutgers University
Title and abstract: TBDContact Information: Prof. Alexander Balatsky
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Apr
17
Profs. Jason Hancock and Diego Valente3:30pm
Profs. Jason Hancock and Diego Valente
Friday, April 17th, 2020
03:30 PM - 04:30 PM
Storrs Campus Gant Plaza
Physics Colloquium (Profs. Jason Hancock and Diego Valente)
Studio physics intro and discussionContact Information: Prof. Jason Hancock
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Contact Information
| Phone: | (860) 486-7137 (Office) |
|---|---|
| E-mail: | andrew.puckett@uconn.edu |
| Address: | 196 Auditorium Road, Unit 3046 Storrs, CT 06269-3046 |
| More: | https://physics.uconn.edu/person/andrew-puckett/ |