Search for the pentaquark via the P-(c)over-bars(0)-> K*(0)K(-)p decay

Citation
Em. Aitala et al., Search for the pentaquark via the P-(c)over-bars(0)-> K*(0)K(-)p decay, PHYS LETT B, 448(3-4), 1999, pp. 303-310
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
448
Issue
3-4
Year of publication
1999
Pages
303 - 310
Database
ISI
SICI code
0370-2693(19990225)448:3-4<303:SFTPVT>2.0.ZU;2-M
Abstract
We have searched for evidence of the production and decay of a neutral boun d-state pentaquark, one of a predicted doublet of states: P-(c over bar s)( 0) = \(c) over bar suud] and P-(c over bar s)(-) = \(c) over bar sddu]. Spe cifically, we have searched for the decay P-(c over bar s)(0) --> K *K-0(-) p in data from Fermilab experiment E791, in which a 500 GeV/c pi(-) beam i nteracted with nuclear targets. We find mass-dependent upper limits at the 90% confidence level for the ratio of cross section times branching fractio n of this decay relative to that for the decay D-s(-) --> K *K-0(-). The up per limits vary between 0.016 and 0.036 for M(P-(c over bar s)(0)) between 2.75 and 2.91 GeV/c(2), assuming a pentaquark lifetime of 0.4 ps. (C) 1999 Published by Elsevier Science B.V. All rights reserved.