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| Home > Publications database > Faddeev approach to the reaction K − d → π Σ n at p K = 1 GeV / c |
| Home > Publications database > Faddeev approach to the reaction K − d → π Σ n at p K = 1 GeV / c |
| Journal Article | FZJ-2018-06203 |
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2018
Inst.
Woodbury, NY
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Please use a persistent id in citations: http://hdl.handle.net/2128/19956 doi:10.1103/PhysRevC.97.055209
Abstract: The reaction K−d→πΣn is studied within a Faddeev-type approach, with emphasis on the specific kinematics of the E31 experiment at J-PARC, i.e., K− beam momentum of pK=1 GeV/c and neutron angle of θn=0∘. The employed Faddeev approach requires as main input amplitudes for the two-body subsystems ¯¯¯¯KN→¯¯¯¯KN and ¯¯¯¯KN→πΣ. For the latter, results from recently published chiral unitary models of the ¯¯¯¯KN interaction are utilized. The ¯¯¯¯KN→¯¯¯¯KN amplitude itself, however, is taken from a recent partial-wave analysis. Because of the large incoming momentum of the K−, the ¯¯¯¯KN interaction is probed in a kinematical regime where those chiral potentials are no longer applicable. A comparison of the predicted spectrum for various πΣ charge channels with preliminary data is made and reveals a remarkable agreement as far as the magnitude and the line shape in general is concerned. Noticeable differences observed in the πΣ spectrum around the ¯¯¯¯KN threshold, i.e. in the region of the Λ(1405) resonance, indicate a sensitivity to the details of the employed ¯¯¯¯KN→πΣ amplitudes and suggest that pertinent high-precision data could indeed provide substantial constraints on the structure of the Λ(1405).
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