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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Excited Hadrons and the Analytical Structure of Bound-State Interaction Kernels

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Author(s):
El-Bennich, Bruno ; Krein, Gastao ; Rojas, Eduardo ; Serna, Fernando E.
Total Authors: 4
Document type: Journal article
Source: FEW-BODY SYSTEMS; v. 57, n. 10, p. 955-963, OCT 2016.
Web of Science Citations: 8
Abstract

We highlight Hermiticity issues in bound-state equations whose kernels are subject to a highly asymmetric mass and momentum distribution and whose eigenvalue spectrum becomes complex for radially excited states. We trace back the presence of imaginary parts in the eigenvalues and wave functions to truncation artifacts and suggest how they can be eliminated in the case of charmed mesons. The solutions of the gap equation in the complex plane, which play a crucial role in the analytic structure of the Bethe-Salpeter kernel, are discussed for several interaction models and qualitatively and quantitatively compared to analytic continuations by means of complex-conjugate pole models fitted to real solutions. (AU)

FAPESP's process: 13/01907-0 - São Paulo Research and Analysis Center
Grantee:Sergio Ferraz Novaes
Support type: Research Projects - Thematic Grants
FAPESP's process: 13/16088-4 - Hadron Physics in the era of the 12 GeV upgrade at Jefferson Lab and new flavor-physics facilities
Grantee:Bruno Omar El-Bennich
Support type: Regular Research Grants