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

Conference · Wed Apr 01 04:00:00 EDT 2015

DOI:https://doi.org/10.2172/1969636· OSTI ID:1969636

Keppel, Cynthia ^[1]; Accardi, Alberto ^[2]; Christy, Michael ^[2]; Brady, Lucas ^[3]; Sato, Nobuo ^[1]; Ehlers, Peter ^[4]; Monaghan, Peter ^[5]; Melnitchouk, Wolodymyr ^[1]

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
2. Hampton Univ., Hampton, VA (United States)
3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); University of California, Santa Barbara
4. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); University of Washington
5. Christopher Newport University

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.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1969636
• Report Number(s): JLAB-THY-15-2277; DOE/OR/23177-6029
• Country of Publication: United States
• Language: English