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Title: Using baryon octet magnetic moments and masses to fix the pion cloud contribution

In this study, using SU(3) symmetry to constrain the $$\pi BB'$$ couplings, assuming SU(3) breaking comes only from one-loop pion cloud contributions, and using the the covariant spectator theory to describe the photon coupling to the quark core, we show how the experimental masses and magnetic moments of the baryon octet can be used to set a model independent constraint on the strength of the pion cloud contributions to the octet, and hence the nucleon, form factors at $Q^2=0$.
Authors:
;  [1] ;  [2]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Centro de Fisica Teorica de Particulas, Lisboa (Portugal)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
OSTI Identifier:
983606
Report Number(s):
JLAB-THY--09-1075; DOE/OR/23177--1004
Journal ID: ISSN 0370-2693; PYLBAJ; TRN: US1004582
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 690; Journal Issue: 2; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BARYON OCTETS; CLOUDS; FORM FACTORS; MAGNETIC MOMENTS; PHOTONS; PIONS; QUARKS; SYMMETRY baryon octet; magnetic moments; pion cloud