• Open Access

Anomalous decay f1(1285)π+πγ in the Nambu–Jona-Lasinio model

A. A. Osipov and M. K. Volkov
Phys. Rev. D 97, 074020 – Published 18 April 2018

Abstract

Using the Nambu–Jona-Lasinio model with the U(2)×U(2) chiral symmetric effective four-quark interactions, we derive the amplitude of the radiative decay f1(1285)π+πγ, find the decay width Γ(f1π+πγ)=346keV and obtain the spectral dipion effective mass distribution. It is shown that in contrast to the majority of theoretical estimates (which consider the a1(1260) meson exchange as the dominant one), the most relevant contribution to this process is the ρ0-resonance exchange related with the triangle f1ρ0γ anomaly. The spectral function is obtained to be confronted with the future empirical data.

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  • Received 25 January 2018

DOI:https://doi.org/10.1103/PhysRevD.97.074020

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

A. A. Osipov* and M. K. Volkov

  • Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 141980, Russia

  • *aaosipov@theor.jinr.ru
  • volkov@theor.jinr.ru

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Issue

Vol. 97, Iss. 7 — 1 April 2018

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