The Evidence for a Pentaquark Signal and Kinematic Reflections

Details The Evidence for a Pentaquark Signal and Kinematic Reflections The Evidence for a Pentaquark Signal and Kinematic Reflections

2003-11-10

arxiv.org/abs/hep-ph/0311125v1

Phys.Rev. D69 (2004) 051901

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 4 figures

Scientific paper

10.1103/PhysRevD.69.051901

Several recent experiments have reported evidence for a narrow baryon resonance with positive strangeness ($\Theta^+$) at a mass of 1.54 GeV/$c^2$. Baryons with $S=+1$ cannot be conventional $qqq$ states and the reports have thus generated much theoretical speculation about the nature of possible $S=+1$ baryons, including a 5-quark, or pentaquark, interpretation. We show that narrow enhancements in the $K^+n$ effective mass spectrum can be generated as kinematic reflections resulting from the decay of mesons, such as the $f_2(1275)$, the $a_2(1320)$ and the $\rho_3(1690)$.

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