scholarly journals Induced pseudoscalar form factor of the nucleon at two-loop order in chiral perturbation theory

2003 ◽  
Vol 67 (2) ◽  
Author(s):  
N. Kaiser
Keyword(s):  
Perturbation Theory ◽  
Form Factor ◽  
Chiral Perturbation Theory ◽  
Loop Order ◽  
Chiral Perturbation ◽  
Pseudoscalar Form Factor

scholarly journals CHIRAL PERTURBATION THEORY STUDY OF THE AXIAL N → Δ(1232) TRANSITION

2008 ◽  
Vol 23 (27n30) ◽  
pp. 2246-2249 ◽  
Author(s):  
L. S. GENG ◽  
J. MARTIN CAMALICH ◽  
L. ALVAREZ-RUSO ◽  
M. J. VICENTE VACAS
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Theoretical Study ◽  
Form Factors ◽  
Transition Form ◽  
Loop Order ◽  
Chiral Perturbation

We have performed a theoretical study of the axial Nucleon to Delta(1232) (N → Δ) transition form factors up to one-loop order in covariant baryon chiral perturbation theory within a formalism in which the unphysical spin-1/2 components of the Δ fields are decoupled.

scholarly journals ChPT loops for the lattice: pion mass and decay constant, HVP at finite volume and nn̅-oscillations

2018 ◽  
Vol 175 ◽  
pp. 06011
Author(s):  
Johan Bijnens
Keyword(s):  
Perturbation Theory ◽  
Finite Volume ◽  
Chiral Perturbation Theory ◽  
Vacuum Polarization ◽  
Decay Constant ◽  
Pion Mass ◽  
Loop Order ◽  
Chiral Perturbation ◽  
Lattice Calculations

I present higher loop order results for several calculations in Chiral perturbation Theory. 1) Two-loop results at finite volume for hadronic vacuum polarization. 2) A three-loop calculation of the pion mass and decay constant in two-flavour ChPT. For the pion mass all needed auxiliary parameters can be determined from lattice calculations of ππ-scattering. 3) Chiral corrections to neutron-anti-neutron oscillations.

scholarly journals Taylor's Series and Dispersion Relation Analyses of the Vector Pion Form Factor and their Comparison with Perturbative and Non Perturbative Calculations

2015 ◽  
Vol 25 (1) ◽  
pp. 21
Author(s):  
Truong Nguyen Tran
Keyword(s):  
Experimental Data ◽  
Perturbation Theory ◽  
Form Factor ◽  
Dispersion Relation ◽  
Momentum Transfer ◽  
Chiral Perturbation Theory ◽  
Pion Form Factor ◽  
P Wave ◽  
Chiral Perturbation ◽  
Taylor’S Series

The first three coefficients of the Taylor's series expansion of the vevtor pion form factor as a function of the momentum transfer are evaluated using the experimental data on the pion form factor and the P-wave \(\pi\pi\) phase shifts. The real part of the form factor as a function of energy is also calculated by dispersion relation. Comparisons there results with Chiral Perturbation Theory and unitarized models are given.

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