[phas-dept] dinner with the guest - RE: For 401/501 - Nov. 2 (Thursday) 4 PM - Physics and Astronomy Colloquium

[Heungman Park]

All students,

Please let me know if you want to meet him at dinner tomorrow.

Thank you.

_____________________________________
Heungman Park, Ph.D.
Assistant Professor
Department of Physics & Astronomy
Texas A&M University-Commerce
Commerce, TX 75429, USA



Fall 2017 Colloquium

Department of Physics & Astronomy, TAMU-Commerce

Nov 2, Thursday, 4-5 PM in Science Building 127

(coffee and cookies will be served at 3:50 PM)

Particle Physics (Quantum Chromodynamics)

Lattice QCD investigations of quark transverse momentum in hadrons
Dr. Michael Engelhardt

New Mexico State University


[https://urldefense.proofpoint.com/v2/url?u=https-3A__lh5.googleusercontent.com_Y-2DtSysnp5GIoasfh6ZUYSDpMjl88PGQZziBv00PnJbz1GgcP-2DzuX-2DfMIzTc35SaWnqAo30zU9WZa7aT5lbYWkAnfKj5bxEfKLDmDfLLTLaDaYlzezEgH0-5FiBPj72tYCpUfhI0fUq&d=DwIFAw&c=oqyuZuih6ykib6aKiBq22_bich4AVfYGoLertJN0bEc&r=hjwEO_XYlnwAQWUGeaCrW47w4mK-Al28-BKyRvaivBs&m=5LNqSf-NdjKsct9IwErcJpGk7_pBYnWQoStKfdEQH5k&s=ti5ZwFeTaRww7kchDrVfEdmean1tWEjDZc1YXJBxiLw&e=]

Dr. Engelhardt earned his doctorate degree in Physics at the University of Erlangen, Germany, in 1994. His research topic was on Confinement and Thermodynamics in Quantum Chromodynamics (QCD) in 1+1 dimensions. He worked as a post-doc at the Weizmann Institute in Israel, and at the University of Tuebingen in Germany, on diverse aspects of the strong interaction, most prominently the vortex picture of the QCD vacuum. In 2004, Dr. Engelhardt began his appointment as an assistant professor at New Mexico State University, obtaining tenure in 2010. He is currently doing research in theoretical nuclear physics. More information of his research can be found at

https://urldefense.proofpoint.com/v2/url?u=http-3A__physics.nmsu.edu_people_facstaff_MichaelEngelhardt.html&d=DwIFAw&c=oqyuZuih6ykib6aKiBq22_bich4AVfYGoLertJN0bEc&r=hjwEO_XYlnwAQWUGeaCrW47w4mK-Al28-BKyRvaivBs&m=5LNqSf-NdjKsct9IwErcJpGk7_pBYnWQoStKfdEQH5k&s=q23yotrC5SM7Fh0pA8hSdhSq8eBjk1xRYYs9M1wxh9o&e=


Abstract

An ongoing program of evaluating transverse momentum-dependent (TMD) observables in hadrons within Lattice QCD is reviewed, summarizing recent progress with respect to several challenges faced by such calculations. These lattice calculations are based on a definition of TMDs through hadronic matrix elements of quark bilocal operators, including an appropriate gauge connection between the quarks. Results presented include data on the Sivers and Boer-Mulders effects, exhibiting the decisive role of the gauge connection in encoding information about the struck quark in a deep inelastic scattering process. Generalizing these TMD calculations by connecting them with information about quark transverse position in the hadron allows one to access quark orbital angular momentum and provide a new perspective on the proton spin puzzle - the question of how the proton's spin arises from the spins and orbital angular momenta of its constituents.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.tamuc.edu/pipermail/phas-dept/attachments/20171101/5b589e98/attachment.html>