Clues for the existence of two $K_1(1270)$ resonances

Abstract

The axial vector meson $K_1(1270)$ was studied within the chiral unitary approach, where it was shown that it has a two-pole structure. We reanalyze the high-statistics WA3 experiment $K^{-}p\to K^{-}{\pi }^{+}{\pi }^{-}p$ at 63 GeV, which established the existence of both $K_1(1270)$ and $K_1(1400)$, and we show that it clearly favors our two-pole interpretation. We also reanalyze the traditional K-matrix interpretation of the WA3 data and find that the good fit of the data obtained there comes from large cancellations of terms of unclear physical interpretation.

published version in PRD; typos corrected; title changed to "Clues for the existence of two $K_1(1270)$ resonances"

References in corpus (1)

• Strange axial-vector mesons mixing angle

Cited by in corpus (18)

• Vector meson-vector meson interaction in a hidden gauge unitary approach
• The ρρinteraction in the hidden gauge formalism and the f_0(1370) and f_2(1270) resonances
• Axial Resonances in the Open and Hidden Charm Sectors
• Hidden gauge formalism for the radiative decays of axial-vector mesons
• Two-pole structures in QCD: Facts, not fantasy!
• Pseudocalar meson and vector meson interactions and dynamically generated axial-vector mesons
• Low-lying even parity meson resonances and spin-flavor symmetry
• Revising the $f_1(1420)$ resonance
• The radiative decay of the $\Lambda (1405)$ and its two-pole structure
• The role of the N*(1535) resonance and the pi^- p --> KY amplitudes in the OZI forbidden pi N --> phi N reaction
• Quantum loops in radiative decays of the $a_1$ and $b_1$ axial-vector mesons
• Theoretical description of the $\mathbf{J}/\mathbf{\psi }\to \mathbf{\eta }({\mathbf{\eta }}^{\prime }){\mathbf{h}}_1(1380)$, $\mathbf{J}/\mathbf{\psi }\to \mathbf{\eta }({\mathbf{\eta }}^{\prime }){\mathbf{h}}_1(1170)$ and $\mathbf{J}/\mathbf{\psi }\to {\mathbf{\pi }}^0{\mathbf{b}}_1(1235{)}^0$ reactions
• Radiative decay into $\gamma P$ of the low lying axial-vector mesons
• Chiral Unitary Dynamics of Hadrons and Hadrons in a Nuclear Medium
• Tau decay into ${\nu }_{\tau }$ and $a_1(1260)$, $b_1(1235)$, and two $K_1(1270)$
• Faddeev fixed center approximation to $\pi \bar{K}{K}^{\ast }$ system and the ${\pi }_1(1600)$
• I=1/2 low-lying mesons in lattice QCD
• Recent Developments in Chiral Unitary Dynamics of Resonances