The Gottfried Sum Rule Revisited

Apr 13, 2016, 9:00 AM
15m
Auditorium (DESY Hamburg)

Auditorium

DESY Hamburg

Structure Functions and Parton Densities WG1 Structure Functions and Parton Densities

Speaker

Dr Cynthia Keppel (Thomas Jefferson National Accelerator Facility)

Description

Significant progress has recently been made, both experimentally and theoretically, in extracting the neutron structure function from deuterium data. Of particular note are the new CTEQ-JLab (CJ) nuclear corrections for large x PDF extraction, and the Jefferson Lab "BONUS" experiment, where a novel tagged proton spectator approach was employed to isolate the neutron target in electron-deuteron scattering. The BONUS data, combined with a wealth of precision deuterium data from Jefferson Lab, SLAC, and NMC, the latter now all with state-of-the-art CJ nuclear corrections applied, has been used to re-evaluate the Gottfried Sum rule integrand F2n-F2p. Results of this analysis will be presented, and compared with the well-known results from NMC which lacked precision neutron extraction.

Primary author

Prof. Ioana Niculescu (James Madison University)

Co-authors

Prof. Alberto Accardi (Hampton University) Dr Cynthia Keppel (Thomas Jefferson National Accelerator Facility) Prof. Gabriel Niculescu (James Madison University) Dr Wally Melnitchouk (Thomas Jefferson National Accelerator Facility)

Presentation materials