https://doi.org/10.1140/epja/i2019-12913-1
Regular Article - Theoretical Physics
Analysis of excited quark propagator effects on neutron charge form factor
1
School of Mathematics and Physics, Bohai University, 121013, Jinzhou, China
2
School of Physics and Center of Excellence in High Energy Physics & Astrophysics, Suranaree University of Technology, 30000, Nakhon Ratchasima, Thailand
3
Department of Physics, Faculty of Science, Khon Kaen University, 40002, Khon Kaen, Thailand
* e-mail: lxy_gzu2005@126.com
Received:
5
June
2019
Accepted:
11
October
2019
Published online:
20
November
2019
The charge form factor and charge radius of neutron are investigated in the perturbative chiral quark model (PCQM) with considering both the ground and excited states in the quark propagator. A Cornell-like potential is extracted in accordance with the predetermined ground state quark wave function, and the excited quark states are derived by solving the Dirac equation with the extracted PCQM potential numerically. The study reveals that the contributions of the excited quark states are considerably influential in the charge form factor and charge radius of neutron as expected, and the total results are significantly improved and increased by nearly four times by including the excited states in the quark propagator. The theoretical PCQM results are found, including the ground and excited quark propagators, in good agreement with the recent lattice QCD values at pion mass of about 130MeV.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019
