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(K)over-bar N N absorption within the framework of the fixed-center approximation to Faddeev equations

AuthorsBayar, M. ; Oset, Eulogi
KeywordsKaon-nucleon interactions
Meson-baryon scattering
Chiral dynamics
Issue Date23-Oct-2013
PublisherAmerican Physical Society
CitationPhysical Review - Section C - Nuclear Physics 88 (4): 044003 - 8 (2013)
AbstractWe present a method to evaluate the (K) over bar absorption width in the bound (K) over bar N N system. Most calculations of this system ignore this channel and only consider the (K) over bar N -> pi Sigma conversion. Other works make a qualitative calculation using perturbative methods. Since the (1405) resonance is playing a role in the process, the same resonance is changed by the presence of the absorption channels andwe find that a full nonperturbative calculation is called for, which we present here. We employ the fixed center approximation to Faddeev equations to account for (K) over bar rescattering on the (NN) cluster and we find that the width of the states found previously for S = 0 and S = 1 increases by about 30 MeV due to the (K) over bar N N absorption, to a total width of about 80 MeV.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevC.88.044003
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