Abstract
We have searched for Θ+ via π-p→K -X reaction using 1.87 and 1.92 GeV/c π- beam at the K2 beam line of the KEK 12 GeV proton synchrotron. In the missing mass spectrum at beam momentum of 1.92 GeV/c, a bump has been found at 1530 MeV/c2 which is consistent with the mass reported by several experiments. The statistical significance of this bump, however, is only 2.5-2.7σ. Therefore we have derived the upper limit of Θ+ production cross section via π-p→K-Θ+ reaction which is 3.9 μb at 90% confidence level assuming that Θ+ is produced isotropically in the center of mass system.
Original language | English |
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Pages (from-to) | 72-79 |
Number of pages | 8 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 635 |
Issue number | 2-3 |
DOIs | |
Publication status | Published - 2006 Apr 6 |
Externally published | Yes |
Keywords
- Baryons
- Glueball and nonstandard multi-quark/gluon states
- Hadron-induced low- and intermediate-energy reaction and scattering
- Pion-baryon interactions
ASJC Scopus subject areas
- Nuclear and High Energy Physics