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Area of Science:

  • High Energy Physics
  • Particle Physics
  • Quantum Chromodynamics

Background:

  • Dalitz plot analysis is a crucial tool for studying three-body decays of particles.
  • Understanding exotic resonant states provides insights into the fundamental forces and structures within matter.

Purpose of the Study:

  • To perform a Dalitz plot analysis of specific particle decays.
  • To search for and characterize exotic resonant states in these decays.
  • To measure the branching fraction of a particular decay mode.

Main Methods:

  • Utilized data from proton-proton collisions collected by the LHCb detector.
  • Analyzed data at center-of-mass energies of 7 and 8 TeV.
  • Employed Dalitz plot analysis techniques to model the decay dynamics.

Main Results:

  • A satisfactory description of the data required including an exotic resonant state.
  • The exotic resonance has a significance exceeding three standard deviations.
  • The mass and width of the exotic resonance were determined to be and , respectively.
  • Spin-parity assignments and are consistent with the data.
  • The branching fraction of the decay was measured for the first time.

Conclusions:

  • The study provides evidence for an exotic resonant state.
  • The measured branching fraction offers valuable information for future theoretical and experimental studies.
  • The findings contribute to the ongoing exploration of the hadron spectrum and the nature of exotic particles.