2003/07/29 by S. Nussinov, Nussinov, S.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0307357
10 pages, no figures, RevTex 4
arxiv created 2003/07/29 · arxiv updated 2009/12/01
We point out that existing K+d scattering data available in the PDG (Particle Data Group compilation) suggest some fluctuations in those momentum bins where the (Fermi motion broadened) Θ+[1543] resonance recently indicated in many gamma nuclear reactions and predicted six years ago by Diakonv Petrov and Polyakov might have shown up. The I=0, JP=1/2+ P-wave channel should have a universal peak cross section of ∼ 37 mb at resonance. The smallness of the effect seen in K+d with the δσ fluctuations being less than 4 mb imply an indirect bound ΓΘ+ < 6 MeV, far stronger than the direct gamma-d measurements. This renders the theoretical interpretation of the new state very difficult.