Pentaquark Searches at the BaBar Experiment

Conference · Wed Nov 02 04:00:00 EST 2005

OSTI ID:878024

Grauges, Eugeni

A review of the results in the inclusive and exclusive searches for pentaquark states obtained from the analysis of the data recorded at the BABAR experiment at the Stanford Linear Accelerator Center PEP-II B-Factory, is presented. Inclusive searches for the strange pentaquark states {Theta}{sub 5}(1540){sup +}, {Xi}{sub 5}(1860){sup --} and {Xi}{sub 5}(1860){sup 0} have been performed in a dataset of e{sup +}e{sup -} annihilations corresponding to 123.4 fb{sup -1} of integrated luminosity. No evidence is found and therefore the corresponding 95% confidence level upper limits on the {Theta}{sub 5}(1540){sup +} and {Xi}{sub 5}(1860){sup --} production rate are set. Additionally the decay {Theta}{sub 5}(1540){sup +} {yields} pK{sub S}{sup 0} has been searched for in events that correspond to interactions of both electrons and hadrons with the inner-most material of the BABAR detector, but then again, no evidence for such a process is found as a result of this analysis. The exclusive search of the {Theta}*{sup ++} pentaquark in the B meson decay B{sup +} {yields} {bar p}{Theta}*{sup ++} where {Theta}*{sup ++} {yields} pK{sup +}, has been carried out in a dataset of 210 fb{sup -1}. The results show no evidence for such a pentaquark in the mass range from 1.43 to 2.00 GeV/c{sup 2} and thus the corresponding upper limits at the 90% confidence level has been set on the product of the branching fractions (BF's) BF(B{sup +} {yields} {bar p}{Theta}*{sup ++}) x BF({Theta}*{sup ++} {yields} pK{sup +}) at the 10{sup -7} level.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 878024
• Report Number(s): SLAC-PUB-11392
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
B MESONS
DECAY
ELECTRONS
Experiment-HEP
HEPEX
HADRONS
HIGH ENERGY PHYSICS
LUMINOSITY
PRODUCTION
STANFORD LINEAR ACCELERATOR CENTER