scholarly journals Perturbation theory in a strong-interaction regime with application to 4d-subshell spectra of Ba and La

1978 ◽  
Vol 11 (24) ◽  
pp. 4119-4134 ◽  
Author(s):  
G Wendin ◽  
A F Starace
2014 ◽  
Vol 29 ◽  
pp. 1460225
Author(s):  
Zhan-Wei Liu ◽  
Ning Li ◽  
Shi-Lin Zhu

We study the strong interaction potentials of [Formula: see text] up to order [Formula: see text] with the heavy meson chiral perturbation theory. Besides the leading contributions from the contact terms we also consider the one-loop corrections to the contact diagrams and the contributions from the 2ϕ-exchange diagrams. Hopefully, the analytical structures of our result will be helpful in the extrapolation of the relevant heavy meson interaction in the lattice QCD simulation.


1999 ◽  
Vol 32 (3) ◽  
pp. 631-647 ◽  
Author(s):  
L Adoui ◽  
C Caraby ◽  
A Cassimi ◽  
D Lelièvre ◽  
J P Grandin ◽  
...  

Author(s):  
John Campbell ◽  
Joey Huston ◽  
Frank Krauss

In Chapter 7, we discuss various aspects of the strong interaction containing a strong non-perturbative or low-scale component. We first briefly summarise the treatment of the total and inelastic cross sections through the analyticity of the scattering amplitude, which leads to the language of Regge poles. We introduce multiple parton interactions, with the underlying theoretical ideas for their description mainly driven by experimental data, before remarking on double parton scattering. Hadronisation, i.e. the transition from the parton of perturbation theory to the observable hadrons, is introduced by first using the idea of fragmentation functions and then discussing two popular phenomenological models describing this transition. We conclude this chapter by remarking on some ideas concerning the description of hadron decays through effective models.


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