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Abstract: Events with observed D* and-or muons in the final state were used to indicatethe presence of beauty quark production and to study the correlations betweenthe particles coming from the same or different B-hadrons. The Next-to-LeadingOrder NLO theoretical predictions for such processes were often availableonly at parton level. A method to calculate visible level cross sections atNLO, based on an interface of the FMNR program to PYTHIA 6.2, is applied. Ituses the NLO description at b-quark level provided by FMNR applying astatistical reduction procedure REDSTAT that allows the link to PYTHIA, fromwhere the description of the B-hadron decay chain is obtained. Comparisons ofthe data and NLO cross sections at visible and b-quark level were found to beconsistent and equivalent.



Autor: A.E. Nuncio Quiroz on behalf of the ZEUS Collaboration

Fuente: https://arxiv.org/







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