corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 85 » Issue 14
< Previous Article | Next Article >

Phys. Rev. Lett. 85, 2892–2894 (2000)

Dynamical Symmetry Breaking in the Sea of the Nucleon

Download: PDF (72 kB) Buy this article Export: BibTeX or EndNote (RIS)

A. W. Thomas1, W. Melnitchouk1,2, and F. M. Steffens3
1Special Research Centre for the Subatomic Structure of Matter, and Department of Physics and Mathematical Physics, Adelaide University, Adelaide SA 5005, Australia
2Jefferson Lab, 12000 Jefferson Avenue, Newport News, Virginia 23606
3Instituto de Fisica–USP, C.P. 66 318, 05315-970, Sao Paulo, Brazil

Received 5 May 2000; published in the issue dated 2 October 2000

We derive the nonanalytic chiral behavior of the flavor asymmetry d̅ -u̅ . Such behavior is a unique characteristic of Goldstone boson loops in chiral theories, including QCD, and establishes the unambiguous role played by the Goldstone boson cloud in the sea of the proton. Generalizing the results to the SU(3) sector, we show that strange chiral loops require that the s-s̅ distribution be nonzero.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.2892
DOI:
10.1103/PhysRevLett.85.2892
PACS:
12.38.-t, 11.30.Na, 12.39.Fe
 
< Previous Article | Next Article >