Studying T<sub>cc</sub><sup>+</sup> decays using effective field theory

ORAL

Abstract

The LHCb collaboration recently discovered a doubly charm tetraquark, Tcc+.  We study its strong and electromagnetic decays in a molecular interpretation using a nonrelativistic effective field theory.  This requires solving a coupled channel problem to account for both the D*0D+ and the D*+D0 channels.  We also compute differential spectra as a function of the invariant mass of the final state meson pair.  These results are in good agreement with the experimental analysis by LHCb.  We discuss the effect of other shallow bound states of two pseudoscalar charm mesons on the decay of Tcc+, as well as next-leading-order contributions from pion exchange and final state rescattering.

*T. M. and R. H. are supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under grant Contract Numbers DE-FG02-05ER41367. S. F. is supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under award number DE-FG02-04ER41338. L.D. is supported by the Alexander von Humboldt Foundation.

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Publication: S. Fleming, R. Hodges, & T. Mehen. Tcc+ decays: differential spectra and two-body final states. arXiv preprint: 2109.02188. Accepted to Physical Review D.

Presenters

  • Reed Hodges

    • Duke University

Authors

  • Reed Hodges

    • Duke University

  • Sean P Fleming

    • University of Arizona

  • Thomas C Mehen

    • Duke University

  • Lin Dai

    • Technische Universität München