K+N scattering data and exotic Z+ resonances
نویسندگان
چکیده
منابع مشابه
Time delayed KN reactions and exotic baryon resonances
Evidences and hints, both from the theoretical and experimental side, of exotic baryon resonances with B = S, have been with us for the last thirty years. The poor status of the general acceptance of these Z resonances is partly due to the prejudice against penta-quark baryons and partly due to the opinion that a proof of the existence of exotic states must be rigorous. This can refer to the qu...
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Abstract We investigate the production of the newly found pentaquark exotic baryon Ξ5 in the KN → KΞ5 and KN → KΞ5 reactions at the tree level. We consider the both positiveand negativeparities of the Ξ5. The reactions are dominated by the sand u-channel processes, and it is observed that the resulting cross sections are very much dependent on the parity of Ξ5 and on the type of form factor. We...
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The impact of a sI=0, JP= 1 2 +dZ+s1540d resonance with a width of 5 MeV or more on the K+NsI=0d elastic cross section and on the P01 phase shift is examined within the KN meson-exchange model of the Jülich group. It is shown that the rather strong enhancement of the cross section caused by the presence of a Z+ with the above properties is not compatible with the existing empirical information ...
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_. -LWe present a comprehensive partial-wave analysis of the; processes rrN ---) &,I3 , KN + &B and TN + &., B in the 3-flavor Skyrme model, with c& an arbitrary pseudoscalar-octet meson and B a h’ octet or g’ decuplet baryon. Overall, we find good, poor, and mixed agreement, respectively, between the model and experiment for these three types of processes. We pay particular attention to assess...
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Motivated by the recent experimental evidence of the exotic B = S = +1 baryonic state Θ (1540), we examine the older existing data on KN elastic scattering through the time delay method. We find positive peaks in time delay around 1.545 and 1.6 GeV in the D03 and P01 partial waves of K N scattering respectively, in agreement with experiments. We also find an indication of the J = 3/2 Θ∗ spin-or...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2005
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2004.12.069