New CTEQ-Jefferson Lab (CJ) analysis of parton distributions

Apr 28, 2015, 9:45 AM


WG1 Structure Functions and Parton Densities WG1 Structure Functions and Parton Densities


Dr Wally Melnitchouk (Jefferson Lab)


We present preliminary results of a new global QCD analysis of PDFs from the CTEQ-Jefferson Lab Collaboration (dubbed "CJ15"), which includes several new data sets and recent theoretical developments. In particular, we study the constraints from new D0 data on *W* boson asymmetries on the *d/u* PDF ratio at large *x*, and, indirectly, on the models of nuclear corrections in the deuteron. The analysis also considers for the first time the impact of Jefferson Lab data on the free neutron/deuteron structure function ratio at large *x*, and reanalyzes the light antiquark asymmetry in the proton from Drell-Yan data using more flexible parametrizations and nuclear corrections to deuterium cross sections. The results provide a new set of baseline PDFs which can be used to more reliably calibrate the effect of future data from the LHC.

Primary authors

Prof. Alberto Accardi (Hampton University/Jefferson Lab) Prof. Eric Christy (Hampton University) Prof. Jeff Owens (Florida State University) Mr Lucas Brady (Jefferson Lab and University of California, Santa Barbara) Dr Nobuo Sato (Jefferson Lab) Mr Peter Ehlers (Jefferson Lab and University of Washington) Prof. Peter Monaghan (Christopher Newport University) Dr Thia Keppel (Jefferson Lab) Dr Wally Melnitchouk (Jefferson Lab)

Presentation materials