Abstract

Further progress in hadron spectroscopy necessitates the phenomenological description of three particle reactions. We consider the isobar approximation, where the connected part of the \[\mathbf {3}\rightarrow \mathbf {3}\] amplitude is first expressed as a sum over initial and final pairs, and then expanded into a truncated partial wave series. The resulting unitarity equation is automatically fulfilled by the B-matrix solution, which is an integral equation for the partial wave amplitudes, analogous to the K-matrix parameterization used to describe \[\mathbf {2}\rightarrow \mathbf {2}\] amplitudes. We study the one particle exchange and how its analytic structure impacts rescattering solutions such as the triangle diagram. The analytic structure is compared to other parameterizations discussed in the literature. We briefly discuss the analogies with recent formalisms for extracting \[\mathbf {3}\rightarrow \mathbf {3}\] scattering amplitudes in lattice QCD.

Details

Title
Phenomenology of relativistic \[\mathbf {3}\rightarrow \mathbf {3}\] reaction amplitudes within the isobar approximation
Author
Jackura, A 1 ; Fernández-Ramírez, C 2 ; Mathieu, V 3 ; Mikhasenko, M 4 ; Nys, J 5 ; Pilloni, A 6 ; Saldaña, K 7 ; Sherrill, N 1 ; Szczepaniak, A P 8 

 Center for Exploration of Energy and Matter, Indiana University, Bloomington, IN, USA; Physics Department, Indiana University, Bloomington, IN, USA 
 Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico City, Mexico 
 Theory Center, Thomas Jefferson National Accelerator Facility, Newport News, VA, USA 
 Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Bonn, Germany 
 Department of Physics and Astronomy, Ghent University, Ghent, Belgium 
 Theory Center, Thomas Jefferson National Accelerator Facility, Newport News, VA, USA; European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*) and Fondazione Bruno Kessler, Villazzano, TN, Italy 
 Center for Exploration of Energy and Matter, Indiana University, Bloomington, IN, USA; California State University, Bakersfield, CA, USA 
 Center for Exploration of Energy and Matter, Indiana University, Bloomington, IN, USA; Physics Department, Indiana University, Bloomington, IN, USA; Theory Center, Thomas Jefferson National Accelerator Facility, Newport News, VA, USA 
Pages
1-27
Publication year
2019
Publication date
Jan 2019
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2169573592
Copyright
The European Physical Journal C is a copyright of Springer, (2019). All Rights Reserved., © 2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.