0000000000892416

AUTHOR

V. Lemaire

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Search for pentaquarks states in Z decays

2004

Exotic hadrons made of five quarks (pentaquarks) are searched for in hadronic Z decays collected by the ALEPH detector at LEP. No significant signal is observed. At 95% C.L. upper limits are set on the production rates N of such particles and their charge-conjugate state per Z decay: N Θ(1535)+·BR(Θ(1535)+→pK S0)<6.2×10-4, N Ε(1862)-·BR(Ε(1862)-→Ε -π-)<4.5×10-4, N Ε(1862)0·BR(Ε(1862)0→Ε -π+)<8.9×10-4, N Θc(3100)0·BR(Θc(3100) 0→D*-p)<6.3×10-4, N Θc(3100)0·BR(Θc(3100) 0→D-p)<31×10-4. © 2004 Elsevier B.V. All rights reserved.

QuarkPhysics1221Particle physicsAlephNuclear and High Energy Physics010308 nuclear & particles physicsHigh Energy Physics::LatticeHadronNuclear TheoryHigh Energy Physics::PhenomenologyExotic hadronState (functional analysis)01 natural sciencesPentaquarkNuclear physicsbaryons mass soliton model0103 physical sciencesQC770[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Physique des particules élémentairesProduction (computer science)High Energy Physics::Experiment010306 general physicsNuclear Experiment
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