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.

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

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Cited by in corpus (61)

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• $P_{cs}(4459)$ and other possible molecular states from ${\Xi }_c^{(\ast )}{\bar{D}}^{(\ast )}$ and ${\Xi }_c^{\prime }{\bar{D}}^{(\ast )}$ interactions
• Dynamically generated resonances from the vector octet-baryon decuplet interaction
• Pseudocalar meson and vector meson interactions and dynamically generated axial-vector mesons
• Low-lying even parity meson resonances and spin-flavor symmetry
• The $Z_{cs}(3985)$ as a threshold effect from the ${\bar{D}}_s^{\ast }D+{\bar{D}}_s{D}^{\ast }$ interaction
• Cross-channel constraints on resonant antikaon-nucleon scattering
• Nature of the axial-vector mesons from their Nc behavior within the chiral unitary approach
• Pole position of the $a_1(1260)$ resonance in a three-body unitary framework
• Revising the $f_1(1420)$ resonance
• Axial meson exchange and the $Z_c(3900)$ and $Z_{cs}(3985)$ resonances as heavy hadron molecules
• The radiative decay of the $\Lambda (1405)$ and its two-pole structure
• Three-body dynamics of the $a_1(1260)$ resonance from lattice QCD
• The role of the N*(1535) resonance and the pi^- p --> KY amplitudes in the OZI forbidden pi N --> phi N reaction
• Unveiling the $K_1(1270)$ double-pole structure in the $\bar{B}\to J/\psi \rho \bar{K}$ and $\bar{B}\to J/\psi {\bar{K}}^{\ast }\pi$ decays
• Prediction of an exotic state around 4240 MeV with $J^{PC}=1^{-+}$ as C-parity partner of Y(4260) in molecular picture
• Theoretical study of the $D^0\to K^{-}{\pi }^{+}\eta$ reaction
• Quantum loops in radiative decays of the $a_1$ and $b_1$ axial-vector mesons
• Low-lying even parity meson resonances and spin-flavor symmetry revisited
• Understanding the $K^{\ast }/K$ ratio in heavy ion collisions
• Prediction of possible $D{K}_1$ bound states
• $\tau$ decay into a pseudoscalar and an axial-vector meson
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• The role of meson interactions in the $D_s^{+}\to {\pi }^{+}{\pi }^{+}{\pi }^{-}\eta$ decay
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