Structure of the X(3872) and its Isospin Symmetry Breaking

M. Takizawa; S. Takeuchi

doi:10.1051/epjconf/20100303026

EPJ

a
b
d
e
ap
st
h
plus

Proceedings

Open Access

EPJ Web of Conferences 3, 03026 (2010)
https://doi.org/10.1051/epjconf/20100303026

Structure of the X(3872) and its Isospin Symmetry Breaking

M. Takizawa¹^a and S. Takeuchi²

¹ Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
² Japan College of Social Work, Kiyose, Tokyo 204-8555, Japan

^a e-mail: takizawa@ac.shoyaku.ac.jp

Abstract

In order to understand the structure of the X(3872), we have studied the eﬀects of the charmonium core state coupling to the D⁰ and D⁺ D⁻* molecule states. We determine the coupling strength so as to reproduce the observed mass of the the X(3872). The isospin symmetry breaking is introduced by the mass diﬀerences of the neutral and charged mesons. The obtained structure of the X(3872) is about 15% of charmoniumu, 72% of the isoscalar D molecule and 13% of the isovector D molecule which explains observed properties of the X(3872) well.