[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, July 27, 2015
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, L102

*Nuclear PDFs and Electroweak Boson Production in Heavy Nuclei*

D.B. Clark
Southern Methodist University

Drell-Yan W/Z electroweak boson production at the LHC is an essential 
standard candle which is used for
calibration of beam luminosity and detector properties. In addition to 
proton-proton collisions, the LHC
has measured heavy nuclei lead-lead and proton-lead W/Z production. 
Comparison of these data sets can
provide discriminating information of the nuclear modifications present 
in the Parton Distribution Functions (PDFs).

The nCTEQ collaboration has recently released the nCTEQ15 set of nuclear 
PDFs (nPDFs) with Hessian error
estimation sets for various values of A. These new nPDFs will be 
presented along with an analysis of W/Z
production in lead-lead and proton-lead collisions at the LHC. 
Cross-sections are calculated at NLO with the
FEWZ program at 2.76 and 5.02 TeV. We identify observables where the 
nuclear modifications are larger than
the predicted uncertainty, and we compare these calculations to recent 
CMS measurements.
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