May 17 – 20, 2021
online via ZOOM
Europe/Warsaw timezone

New Baryon State N’(1720)3/2+ from the CLAS pi^+pi^--p Photo- and Electroproduction Data

May 18, 2021, 5:15 PM
20m
online via ZOOM

online via ZOOM

Speaker

Victor Mokeev (Thomas Jefferson National Accelerator Facility)

Description

Combined studies of exclusive meson photo- and electroproduction have extended the capabilities in the search for new excited states of the nucleon, the so called “missing” resonances. New excited state of the nucleon, N’(1720)3/2+ has been observed in the combined studies of the pi^+pi^-p photo- and electroproduction off protons data measured with the CLAS detector at Jlab. The results on the new baryon state observation will be presented and discussed in the talk. A successful description of the pi^+pi^-p photo- and electroproduction data achieved with independent from photon virtualities (Q^2) mass, total and partial hadronic decay widths of N’(1720)3/2^+ state offers a strong evidence for the existence of this new resonance. Currently, N’(1720)3/2^+ resonance is the only observed new baryon state for which the results on Q^2-evolution of the electroexcitation amplitudes have become available. They offer an insight into the “missing” resonance structure for the first time. Future analyses of the N’(1720)3/2^+ electroexcitation amplitudes will shed light on the particular structural features of “missing” resonances which made their observation so challenging for decades.

Collaboration CLAS Collaboration

Primary author

Victor Mokeev (Thomas Jefferson National Accelerator Facility)

Presentation materials