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Radiative decays of f₁(1285) as the K^*bar K molecular state

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arxiv 1907.12202 v1 pith:DR4ESY7S submitted 2019-07-29 hep-ph hep-ex

Radiative decays of f₁(1285) as the K^*bar K molecular state

classification hep-ph hep-ex
keywords radiativedecayspredictionsstateagreementcalculatedcomparisondecode
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Within a picture of the $f_1(1285)$ being a dynamically generated resonance from the $ K^*\bar K$ interactions, we estimate the rates for the radiative transitions of the $f_1(1285)$ meson to the vector mesons $\rho^0$,$\omega$ and $\phi$. These radiative decays proceed via the kaon loop diagrams. The calculated results are in fair agreement with the experimental measurements. Some predictions can be tested by experiments and their implementation and comparison with these predictions will be valuable to decode the nature of the $f_1(1285)$ state.

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  1. Three-body unitary determination of the $f_1(1285)$ and $f_1(1420)$ pole positions

    hep-ph 2026-06 unverdicted novelty 6.0

    Fitting a spectator-isobar three-body unitary amplitude to BESIII K0S K0S pi0 data yields poles at (1277±2±1)-i(12±1±0) MeV for f1(1285) and (1435±2±7)-i(40±2±1) MeV for f1(1420), with the latter traced to a K Kbar* q...