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Physics & Astronomy

Speaker: Carl Gagliardi
Texas A & M University


Wednesday, March 29, 2017
4:00 PM  to 5:00 PM

101  Brockman Hall for Physics
Rice University
6100 Main St
Houston, Texas, USA

For the past 30 years, there has been an intense world-wide effort to understand how the quarks and gluons that make up the proton organize themselves to produce its spin of 1/2 hbar. The primary tool in this quest has been deep-inelastic scattering of polarized electrons and muons off polarized protons. A surprising discovery has been that the spins of the quarks and anti-quarks only contribute ~1/3 of the proton spin. During the past decade, the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Lab has enabled a new, complementary probe: high-energy polarized pp collisions. The RHIC spin program has provided several essential new insights regarding the partonic origin of the proton spin, including evidence that the gluons in the proton are polarized and may even contribute a larger fraction of the proton spin than the quarks do. In this talk, I'll discuss a few of the things we've learned from the RHIC spin program, and where we are heading over the next several years.

Biography of Carl Gagliardi:
Carl Gagliardi is Professor of Physics at Texas A&M. He received his Ph.D. from Princeton in 1982. After a brief period as a post-doc at Argonne National Laboratory, he joined the Physics Dept at Texas A&M later that same year and has been there since. His research through the years has focused on experimental studies of fundamental interactions, nuclear astrophysics, and the QCD structure of the proton, with experiments at the Texas A&M Cyclotron Institute, Los Alamos, Fermilab, TRIUMF, and Brookhaven. He has been a member of the STAR Collaboration at the BNL Relativistic Heavy Ion Collider since 2000, where he has filled many different roles, including Deputy Spokesperson from 2005-08 and Decadal Plan chair from 2010-13. He is a Fellow of the American Physical Society and was a member of the working group that prepared the 2015 DOE/NSF NSAC Long-Range Plan for Nuclear Science.

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