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Título : The gamma d -> K(+)K(-)np reaction and an alternative explanation for the "Theta(+)(1540) pentaquark" peak
Autor : Martínez Torres, Alberto, Oset, Eulogi
Fecha de publicación : 24-May-2010
Editor: American Physical Society
Resumen: We present a calculation of the gamma d -> K(+)K(-)np reaction with the aim of seeing whether the experimental peak observed in the K(+)n invariant mass around 1526 MeV, from where evidence for the existence of the Theta(+) has been claimed, can be obtained without this resonance as a consequence of the particular dynamics of the process and the cuts applied in the experimental setup. We find that a combination of facts leads indeed to a peak around 1530 MeV for the invariant mass of K(+)n without the need to invoke any new resonance around this energy. This, together with statistical fluctuations that we prove to be large with the statistics of the experiment, is likely to produce the narrower peak observed there.
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ISSN: 0556-2813
DOI: 10.1103/PhysRevC.81.055202
Citación : Physical Review - Section C - Nuclear Physics 81 (5): 055202 (2010)
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