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

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

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Geng, Li Sheng; Oset Báguena, Eulogio Perfil; Roca Zamora, Luis; Oller Berber, José Antonio
Aquest document és un/a article, creat/da en: 2007
The axial-vector meson K1(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-pi+pi-p at 63 GeV, which established the existence of both K1(1270) and K1(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.

    Geng, Li Sheng Oset Báguena, Eulogio Roca Zamora, Luis Oller Berber, José Antonio 2007 Clues for the existence of two K-1(1270) resonances Physical Review D 75 1 014017
http://dx.doi.org/10.1103/PhysRevD.75.014017
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