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.

Egiyan, H., Langheinrich, J., Gothe, R., Graham, L., Holtrop, M., Lu, H., et al. (2012). Upper limits for the photoproduction cross section for the phi(--)(1860) pentaquark state off the deuteron. PHYSICAL REVIEW. C, NUCLEAR PHYSICS, 85(14), 015205-1-015205-9 [10.1103/PhysRevC.85.015205].

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

D'ANGELO, ANNALISA;
2012-01-30

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
30-gen-2012
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
DEEP-INELASTIC SCATTERING; XI-PI; SEARCH; CLAS; DETECTOR; HERA; BARYONS; DECAYS; SYSTEM; LEP
Clas collaboration
http://prc.aps.org/abstract/PRC/v85/i1/e015205
Egiyan, H., Langheinrich, J., Gothe, R., Graham, L., Holtrop, M., Lu, H., et al. (2012). Upper limits for the photoproduction cross section for the phi(--)(1860) pentaquark state off the deuteron. PHYSICAL REVIEW. C, NUCLEAR PHYSICS, 85(14), 015205-1-015205-9 [10.1103/PhysRevC.85.015205].
Egiyan, H; Langheinrich, J; Gothe, R; Graham, L; Holtrop, M; Lu, H; Mattione, P; Mutchler, G; Park, K; Smith, E; Stepanyan, S; Zhao, Z; Adhikari, K; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/69373
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