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Two topics in multiparticle dyamics at LEP: multiplicity in b-bbar events and screwiness at the end of the QCD cascade | Alessandro de Angelis
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19 Nov 1998 | Subject: | hep-ex | Abstract: | This talk deals with two topics in multiparticle dynamics investigated by means of the DELPHI detector at LEP. Related to the first topic, we have used the data collected at 183 GeV to measure the average charged particle multiplicity in $e^+e^- o bar{b}$ events. The result is remarkably in agreement with QCD predictions, while it is more than two standard deviations larger than calculations assuming that the multiplicity accompanying the decay of a heavy quark is independent of the mass of the quark itself. The second topic deals with a recent theoretical model by Andersson et al., in which soft gluons order themselves in the form of a helix at the end of the QCD cascades. In our data at the Z peak, we have found no evidence for such an effect. | Source: | arXiv, hep-ex/9811034 | Services: | Forum | Review | PDF | Favorites |
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