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  • Open Access

Searching for femtoscopic signatures of the DD¯ (I=0), X(3700), bound state

Luciano M. Abreu*

Juan M. Torres-Rincon†

  • Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos (ICCUB), Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain

  • *Contact author: luciano.abreu@ufba.br
  • †Contact author: torres@fqa.ub.edu
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Phys. Rev. D 112, 016003 – Published 2 July, 2025

DOI: https://doi.org/10.1103/vffb-kv1t

Abstract

The femtoscopic DD¯ correlation functions are investigated to predict the signature of the not-yet-established X(3700) state. Here it is interpreted as a bound state generated by solving the coupled-channel Bethe-Salpeter equations with the local hidden-gauge formalism. We prospect how the relevant properties and observables characterizing this state—like the pole position, scattering lengths and compositeness—might be affected by the variation of the parameters of the model. The amplitudes are then used as input into the momentum correlation functions of the D0D¯0 and D+D− pairs. We discuss how their behaviors encode the features of the X(3700) state.

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Phys. Rev. D 112, 016003– Published 2 July, 2025
  • Received 22 March 2025
  • Accepted 13 June 2025
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