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HEP Seminar: Probing nuclei with ultra-high energy protons at the LHC

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Brian Cole, Columbia University
When
02 April 2014 from 2:30 PM to 3:30 PM
Where
339 Davey Laboratory
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Ultra-high energy proton-nucleus collisions provide an valuable laboratory for studying quantum chromodynamics at high parton density and for probing the partonic structure of nuclei. Measurements of soft and semi-hard particle production probe potential saturation effects at low x, while measurements of high-pT particle and jet production probe nuclear parton distributions over a wide range of x and Q^2 values.

In 2012 and 2013 the LHC collided protons with lead nuclei at a nucleon-nucleon center of mass energy of 5.02 TeV, the highest energy ever achieved in proton-nucleus measurements.  The ATLAS detector with its large acceptance tracking, calorimetry and muon spectrometers is ideal for making measurements of soft, semi-hard and hard particle production. Results of proton-lead measurements made by the ATLAS experiment and the other LHC experiments will be presented and discussed. The results of these measurements are challenging our understanding of the physics of proton-nucleus collisions.

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