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Jari Häkkinen

Publications and source records attributed to Jari Häkkinen.

2 recordsLinked to original sources
arXiv1997

Bose-Einstein and Colour Interference in W-pair Decays

We study effects on the W mass measurements at LEP2 from non-perturbative interference effects in the fully hadronic decay channel. Based on a model for Bose-Einstein interference, which is in agreement with LEP1 data, we argue that there are no Bose-Einstein correlations between bosons coming from the different W's. For small reconnection probabilities we rule out the possible experimental signal of colour interference at LEP2, suggested in previous work. The conclusions from this paper are that the theoretical uncertainties in the W mass determination should be smaller than the experimental statistical error.

hep-ph↗
arXiv1996

bbbar fragmentation and Bπcorrelations

We show that experimental data are in very good agreement with predictions from the string fragmentation model by Bowler and Morris. We present a physical interpretation and discuss the relation to results obtained from Perturbative QCD and Local Hadron Parton Duality (LPHD). We also present implications for B$π$ correlations and the possibility to use these as a tag to study CP violation in B decays.

hep-ph↗