Role of the N(1535) resonance and the pi-p to KY amplitudes in the OZI forbidden piN to phiN reaction

Döring, M.; Oset, E.; Zou, B. S.

doi:10.1103/PhysRevC.78.025207

Journal Article

PreJuSER-3105

Role of the N(1535) resonance and the pi-p to KY amplitudes in the OZI forbidden piN to phiN reaction

Döring, M.FZJ* ; Oset, E. ; Zou, B. S.

2008
Inst. Woodbury, NY

Physical review / C 78(2), 025207 (2008) [10.1103/PhysRevC.78.025207]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10464 doi:10.1103/PhysRevC.78.025207

Abstract: We study the pi N ->phi N reaction close to the phi N threshold within the chiral unitary approach, by combining the pi(-)p -> K+Sigma(-), pi(-)p -> K-0 Sigma(0), and pi(-)p -> K-0 Lambda amplitudes with the coupling of phi to the K components of the final states of these reactions via quantum loops. We obtain good agreement with experiment when the dominant pi(-)p -> K-0 Lambda amplitude is constrained with its experimental cross section. We also evaluate the couplina of N*(1535) to phi N and find a moderate coupling as a consequence of partial cancellation of the large KY components of N*(1535). We also show that the N*(1535) pole approximation is too small to reproduce the measured cross section for the pi N- -> phi N reaction.

Keyword(s): pi nucleon: inelastic scattering ; Phi(1020): hadroproduction ; threshold ; Iizuka-Okubo-Zweig rule ; pi- p: inelastic scattering ; hyperon: hadroproduction ; meson baryon: scattering amplitude ; coupled channel ; Bethe-Salpeter equation ; vector meson: coupling ; N(1535): coupling ; channel cross section: energy dependence ; numerical calculations ; pi nucleon --> Phi(1020) nucleon ; pi- p --> hyperon K

Classification:

Physics, Nuclear

Note: We would like to thank J. Haidenbauer for useful comments. This work is partly supported by DGICYT Contract No. FIS2006-03438, and the National Natural Science Foundation of China and the Chinese Academy of Sciences under Project No. KJCX3-SYW-N2. This research is part of the EU Integrated Infrastructure Initiative Hadron Physics Project under Contract No. RII3-CT-2004-506078. This study is also supported by a grant of the Deutsche Forschungsgemeinschaft.

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