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Open Access item Clues for the existence of two K-1(1270) resonances

Authors:Geng, Li Sheng
Oset, Eulogi
Roca, Luis
Oller, José Antonio
Keywords:Chiral perturbation-theory, Axial-vector mesons, Diffractive production, Q-region, [PACS] Meson-meson interactions (energy ≤ 10 GeV), [PACS] Other strange mesons
Issue Date:22-Jan-2007
Publisher:American Physical Society
Citation:Physical Review D 75(1): 014017 (2007)
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 -> K(-)π(+)π(-)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.
Description:13 pages, 7 figures.-- PACS nrs.: 13.75.Lb; 14.40.Ev.-- ISI Article Identifier: 000243896200047.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0610217
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevD.75.014017
ISSN:1550-7998 (Print)
1550-2368 (Online)
Appears in Collections:(IFIC) Artículos

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