Study of some (non-)conventional mesons in the framework of effective models

The main aim of our study is to understand the nature of some conventional and non-conventional mesonic states by applying effective QFT models. We start from the relativistic Lagrangians containing a unique \(q\bar{q}\) seed state which is strongly coupled to the low-masses decay products of the or...

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Bibliographic Details
Published in:arXiv.org 2020-04
Main Author: Piotrowska, Milena
Format: Article
Language:English
Subjects:
Mesons
Online Access:Get full text
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Summary:The main aim of our study is to understand the nature of some conventional and non-conventional mesonic states by applying effective QFT models. We start from the relativistic Lagrangians containing a unique \(q\bar{q}\) seed state which is strongly coupled to the low-masses decay products of the original state. We find out that some states may appear as a dynamically generated companion poles of the heavier \(q\bar{q}\) mesons. In particular we show that \(K^*_0(700)\) is a companion pole of the well-known \(K^*_0(1430)\) resonance, \(X(3872)\) emerges as a (virtual) companion pole of \(\chi_{c1}(2P)\), and the puzzling \(Y(4008)\) is not a real state, but a spurious enhancement which appears when studying the state \(\psi(4040)\).
ISSN:2331-8422