scholarly journals Dispersive analysis of the scalar form factor of the nucleon

2012 ◽  
Vol 2012 (6) ◽  
Author(s):  
M. Hoferichter ◽  
C. Ditsche ◽  
B. Kubis ◽  
U.-G. Meißner
Keyword(s):  
Form Factor ◽  
Scalar Form Factor ◽  
Scalar Form ◽  
Dispersive Analysis

scholarly journals Dispersive analysis of the scalar form factor of the nucleon

2013 ◽  
Author(s):  
Martin Hoferichter ◽  
Christoph Ditsche ◽  
Bastian Kubis ◽  
Ulf-G Meissner
Keyword(s):  
Form Factor ◽  
Scalar Form Factor ◽  
Scalar Form ◽  
Dispersive Analysis

scholarly journals NUCLEAR INTERACTIONS: THE CHIRAL PICTURE

2008 ◽  
Vol 23 (27n30) ◽  
pp. 2273-2280 ◽  
Author(s):  
M. R. ROBILOTTA
Keyword(s):  
Form Factor ◽  
Pion Exchange ◽  
Scalar Form Factor ◽  
Scalar Form ◽  
Central Potential ◽  
Nuclear Interactions

Chiral expansions of the two-pion exchange components of both two- and three-nucleon forces are reviewed and a discussion is made of the predicted pattern of hierarchies. The strength of the scalar-isoscalar central potential is found to be too large and to defy expectations from the symmetry. The causes of this effect can be understood by studying the nucleon scalar form factor.

scholarly journals Scalar form factor of the proton with light-cone QCD sum rules

2006 ◽  
Vol 73 (9) ◽  
Author(s):  
Zhi-Gang Wang ◽  
Shao-Long Wan ◽  
Wei-Min Yang
Keyword(s):  
Form Factor ◽  
Light Cone ◽  
Sum Rules ◽  
Scalar Form Factor ◽  
Qcd Sum Rules ◽  
Scalar Form

A note on the Kt3 scalar form factor

1971 ◽  
Vol 1 (7) ◽  
pp. 285-289 ◽  
Author(s):  
A. N. Kamal ◽  
Radha Gourishankar
Keyword(s):  
Form Factor ◽  
Scalar Form Factor ◽  
Scalar Form

PION AND ρ MESON OBSERVABLES IN A NAMBU–JONA-LASINIO MODEL INCLUDING A TENSOR INTERACTION

2002 ◽  
Vol 17 (32) ◽  
pp. 4903-4925 ◽  
Author(s):  
M. JAMINON ◽  
M. C. RUIVO ◽  
C. A. DE SOUSA
Keyword(s):  
Form Factor ◽  
Electromagnetic Form Factor ◽  
Tensor Interaction ◽  
Text Structure ◽  
Strong Increase ◽  
Total Width ◽  
Scalar Form Factor ◽  
Dominance Model ◽  
Scalar Form ◽  
Scattering Lengths

We calculate the low energy π π scattering lengths [Formula: see text] and [Formula: see text], the coupling of the ρ to the pion gρ π π, the total width of the ρ, the low q2 behavior of the pion electromagnetic form factor, and the pion scalar form factor within a chiral SU(2) f NJL-type Lagrangian where the spin 1 ρ meson is generated from a four-quark tensor interaction. Such a simple model avoids the mathematical complication related to π - a1 mixing. Two types of regularization are discussed, mainly affecting the values of [Formula: see text] and [Formula: see text]. We find rather good agreement with data. The ρ meson described in this way does not account for the meson vector dominance model: it does not contribute to the [Formula: see text] scattering lengths, and the charge radius of the pion is mainly ascribed to the bare photon quark coupling. Even if the shape of the electromagnetic form factor is well reproduced, the strong increase near the ρ pole does not account for the ρ→ππ decay but only reflects the [Formula: see text] structure of the ρ.

scholarly journals Scalar Form Factor of the Pion in the Kroll-Lee-Zumino Field Theory

2015 ◽  
Vol 2015 ◽  
pp. 1-4
Author(s):  
C. A. Dominguez ◽  
M. Loewe ◽  
M. Lushozi
Keyword(s):  
Field Theory ◽  
Form Factor ◽  
Lattice Qcd ◽  
Leading Order ◽  
Scalar Form Factor ◽  
Perturbative Calculations ◽  
Scalar Form ◽  
Rho Meson ◽  
The Masses

The renormalizable Kroll-Lee-Zumino field theory of pions and a neutral rho-meson is used to determine the scalar form factor of the pion in the space-like region at next-to-leading order. Perturbative calculations in this framework are parameter-free, as the masses and the rho-pion-pion coupling are known from experiment. Results compare favorably with lattice QCD calculations.

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