Detecting the long-distance structure of the

Feng-Kun Guo; Carlos Hidalgo-Duque; Juan Nieves; Altug Ozpineci; Manuel Pavón Valderrama

doi:10.1140/epjc/s10052-014-2885-4

EPJ

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2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2014) 74: 2885
https://doi.org/10.1140/epjc/s10052-014-2885-4

Regular Article - Theoretical Physics

Detecting the long-distance structure of the

Feng-Kun Guo¹^*, Carlos Hidalgo-Duque², Juan Nieves², Altug Ozpineci³ and Manuel Pavón Valderrama⁴

¹ Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, 53115 , Bonn, Germany
² Instituto de Física Corpuscular (IFIC), Centro Mixto CSIC-Universidad de Valencia, Institutos de Investigación de Paterna, Aptd. 22085, 46071 , Valencia, Spain
³ Department of Physics, Middle East Technical University, 06531 , Ankara, Turkey
⁴ Institut de Physique Nucléaire, Université Paris-Sud, IN2P3/CNRS, 91406 , Orsay Cedex, France

^* e-mail: fkguo@hiskp.uni-bonn.de

Received: 10 April 2014
Accepted: 30 April 2014
Published online: 20 May 2014

Abstract

We study the $X(3872)\rightarrow D^0\bar{D}^0\pi ^0$ decay within a $D\bar{D}^*$ molecular picture for the $$X(3872)$$ state. This decay mode is more sensitive to the long-distance structure of the resonance than its $J/\psi \pi \pi$ and $J/\psi 3\pi$ decays, which are mainly controlled by the details of the wave function at short distances. We show that the $D^0\bar{D}^0$ final state interaction can be important, and that a precise measurement of this partial decay width can provide valuable information on the interaction strength between the $D^{(*)}\bar{D}^{(*)}$ charm mesons.