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HEP: Precision QCD at the LHC: challenges and opportunities

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Fred Olness, Southern Methodist University
26 April 2017 from 2:30 PM to 3:30 PM
339 Davey Laboratory
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Despite decades of effort, precision predictions for LHC observables

can be limited by uncertainties of the proton/nucleon composition

(PDFs).  If, we can make detailed predictions of W/Z/Higgs production

(for example), then we have the ability to distinguish a "new physics"

signal from an uncertain SM background process.


We use nCTEQ15 nPDFs with uncertainties to identify measurements which

have a potential impact on nuclear corrections and flavor

differentiation. In particular, recent LHC W/Z vector boson production

data in proton-lead and lead-lead collisions are quite sensitive to

heavier flavors (especially the strange PDF). This complements the

information from neutrino-DIS data. As the proton flavor determination

is dependent on nuclear corrections (from heavy target DIS, for

example), this information may also help improve proton PDFs.