Physics – High Energy Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iche.conf.1021d&link_type=abstract
HIGH ENERGY PHYSICS, ICHEP 2004. Proceedings of the 32nd International Conference. Held 16-22 August 2004 in Beijing, China. Edi
Physics
High Energy Physics
Scientific paper
We search for the strange pentaquark using kaon interactions in the detector material and obtain an upper limit on the ratio of Θ+ and Λ(1520) yields σ(Θ+)/σ(Λ(1520)) < 2% assuming Θ+ is narrow. We report also on searches for the strange and charmed pentaquarks in B meson decays. These results are obtained from a 155 fb-1 data sample collected with the Belle detector near the Υ(4S) resonance, at the KEKB. We report improved measurement of the decays B -> bar {D}DsJ(2317) and B -> bar {D}DsJ(2460) based on 274 × 106 Bbar {B} events. We measure the ratio of DsJ(2460) → Dsγ and Ds*π ^0 branchings to be 0.43 ± 0.08 ± 0.04 and set upper limits for its other decay channels. An angular analysis supports the hypothesis that the DsJ(2317) and DsJ(2460) are a 0+ and 1+ states, respectively. A new decay channel B -> bar {D}*DsJ(2460) is observed. A strict upper limit is set on production of a new DsJ meson observed by SELEX: σ(DsJ(2632))/σ(DsJ(2573)) < 2%.
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