We searched for the Φ−−(1860) pentaquark in the photoproduction process off the deuteron in the Ξ−π−decay channel using CLAS. The invariant mass spectrum of the Ξ−π− system does not indicate any statistically significant enhancement near the reported mass M= 1.860 GeV. The statistical analysis of the sideband-subtracted mass spectrum yields a 90% confidence level upper limit of 0.7 nb for the photoproduction cross section of Φ−−(1860) with a consecutive decay into Ξ−π− in the photon energy range 4.5 GeV< Eγ<5.5 GeV.

Upper limits for the photoproduction cross section for the phi(--)(1860) pentaquark state off the deuteron

CONTALBRIGO, Marco;PAPPALARDO, Luciano Libero;
2012

Abstract

We searched for the Φ−−(1860) pentaquark in the photoproduction process off the deuteron in the Ξ−π−decay channel using CLAS. The invariant mass spectrum of the Ξ−π− system does not indicate any statistically significant enhancement near the reported mass M= 1.860 GeV. The statistical analysis of the sideband-subtracted mass spectrum yields a 90% confidence level upper limit of 0.7 nb for the photoproduction cross section of Φ−−(1860) with a consecutive decay into Ξ−π− in the photon energy range 4.5 GeV< Eγ<5.5 GeV.
2012
H., Egiyan; J., Langheinrich; R. W., Gothe; L., Graham; M., Holtrop; H., Lu; P., Mattione; G., Mutchler; K., Park; E. S., Smith; S., Stepanyan; Z. W.,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1871828
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