Pole position of the a1(1260) resonance in a three-body unitary framework

ORAL

Abstract

Masses, widths, and branching ratios of hadronic resonances are quantified by their pole positions and residues with respect to transition amplitudes on the Riemann sheets of the complex energy plane. We utilize a manifestly 3-body unitary model to determine the pole position of the a1(1260) meson from the ALEPH experiment by allowing for πρ coupled channels in S- and D-wave. We find it to be (1232+15+9 −0−11 − i266+0+15 −22−27) MeV.

*Supported by the National Science Foundation under Grant No. PHY-2012289 and the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Award Number DE-SC0016582, DE-AC05-06OR23177, and DE-FG02-95ER40907.

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Publication: https://arxiv.org/abs/2112.03355

Presenters

  • Felipe amorim

    • Ave Maria University

Authors

  • Daniel Sadasivan

    • Ave Maria University

  • Andrei Alexandru

    • George Washington University

  • Hakan Akdag

    • Universität Bonn

  • Felipe amorim

    • Ave Maria University

  • Ruairi Brett

    • George Washington University

  • Chris Culver

    • University of Liverpool

  • Michael U Doring

    • George Washington University

  • Frank X Lee

    • George Washington University

  • Maxim Mai

    • George Washington University