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Clues for the existence of two K₁(1270) resonances

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arxiv hep-ph/0610217 v3 pith:EGJS7J5T submitted 2006-10-17 hep-ph

Clues for the existence of two K₁(1270) resonances

classification hep-ph
keywords interpretationdataexistencereanalyzetwo-poleapproachaxialcancellations
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The dynamically generated $h_1$ state by the $K^*\bar{K}^*$ interaction and its $K_1(1270)\bar{K}$ and $b_1(1235)\pi$ decays

    hep-ph 2026-01 conditional novelty 5.0

    The dynamically generated h1(1790) K*Kbar* molecule is predicted to decay into K1(1270)Kbar and b1(1235)pi with partial widths of about 0.5 to several MeV, plus stable width ratios R1≈0.3 and R2≈0.53.

  2. Explicitly exotic heavy flavor mesons

    hep-ph 2026-07 unverdicted novelty 3.0

    A coupled-channel three-body calculation predicts an isovector exotic meson with explicit charm and strangeness content.