Valence quark contributions for the gamma N -> P11(1440) transition

Conference · Tue Mar 01 00:00:00 EST 2011 · Few Body Syst.

DOI:https://doi.org/10.1007/s00601-010-0175-8· OSTI ID:1010442

G Ramalho, K Tsushima

A covariant spectator quark model is applied to estimate the valence quark contributions to the$ F1*(Q2) and F2*(Q2) transition form factors for the gamma N -> P11(1440) reaction. The Roper resonance, P11(1440), is assumed to be the first radial excitation of the nucleon. The model requires no extra parameters except for those already fixed by the previous studies for the nucleon. The results are consistent with the experimental data in the high Q2 region, and those from the lattice QCD. Finally the model is also applied to estimate the meson cloud contributions from the CLAS and MAID analysis.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1010442
• Report Number(s): JLAB-THY-10-1269; DOE/OR/23177-1437; arXiv:1010.2765; TRN: US1101612
• Journal Information: Few Body Syst., Vol. 49, Issue 1-4; Conference: 12th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2010), Williamsburg, Virginia, 31 May - 4 Jun 2010.
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CLOUDS
EXCITATION
FORM FACTORS
MESONS
N-1440 BARYONS
NUCLEONS
PHYSICS
QUANTUM CHROMODYNAMICS
QUARK MODEL
QUARKS
VALENCE