Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2004-09-28
Nucl.Phys. A752 (2005) 111-120
Physics
High Energy Physics
High Energy Physics - Experiment
10 pages, 9 figures, 3 tables Proceedings of the INCP2004 Conference - Goteborg (Sweden) June 27 - July 2, 2004
Scientific paper
The existence of an anti-decuplet of pentaquark particles has been predicted some year ago within the chiral soliton model. In the last year, several experimental groups have reported evidence for a S=+1 baryon resonance, with mass ranging from 1.52 and 1.55 GeV and width less than 25 MeV, by looking at the invariant mass of the $K N$ system. This resonance, has been identified with the lowest mass of the anti-decuplet, the $\Theta^+$. At the same time, there are a number of experiment, mostly at high energies, that report null results. An overview of the experimental results so far obtained will be given here together with a review of the second generation experiments currently ongoing and planned at Jefferson Lab Hall B.
CLAS collaboration for the
Rossi Paolo
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