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65 papers · 1 filter
Effective theory approach to unstable particle production
M. Beneke, A. P. Chapovsky, A. Signer +1
Using the hierarchy of scales between the mass, , and the width, , of a heavy, unstable particle we construct an effective theory that allows calculations for resonant proces…
The CMS Silicon Strip Tracker: System Tests and Test Beam Results
Katja Klein
With a total area of 210 squaremeters and about 15000 single silicon modules the silicon strip tracker of the CMS experiment at the LHC will be the largest silicon strip detector e…
W Boson Polarisation at LEP2
The OPAL collaboration, G. Abbiendi
Elements of the spin density matrix for W bosons in e+e- -> W+W- -> qqln events are measured from data recorded by the OPAL detector at LEP. This information is used calculate pola…
Measurement of the partial widths of the Z into up- and down-type quarks
The OPAL collaboration, G. Abbiendi
Using the entire OPAL LEP1 on-peak Z hadronic decay sample, Z -> qbarq gamma decays were selected by tagging hadronic final states with isolated photon candidates in the electromag…
Search for Colour Singlet and Colour Reconnection Effects in Hadronic Z Decays at LEP
L3 Collaboration
A search is performed in symmetric 3-jet hadronic Z decay events for evidence of colour singlet production or colour reconnection effects. Asymmetries in the angular separation of…
Convergence of spectra of graph-like thin manifolds
Pavel Exner, Olaf Post
We consider a family of compact manifolds which shrinks with respect to an appropriate parameter to a graph. The main result is that the spectrum of the Laplace-Beltrami operator c…