Structure of the X(3872) and its Isospin Symmetry Breaking
Showa Pharmaceutical University, Machida, Tokyo
2 Japan College of Social Work, Kiyose, Tokyo 204-8555, Japan
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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.
© Owned by the authors, published by EDP Sciences, 2010