Measurement of the τ\tau topological branching ratios

Using data collected in the DELPHI detector at LEP-1, measurements of the inclusive tau branching ratios for decay modes containing one, three, or five charged particles have been performed: B/sub 1/ identical to B( tau /sup -/ to (particle)/sup $/ ->or=0 pi /sup 0/>or =0K/sup 0/ nu /sub tau /)=(85.33+or-0.10+or-0.05)$/ -h/sup +/>or=0 pi /sup 0/>or =0K/sup 0/ nu /sub tau /)=(14.56+or-0.10+or-0.05)%; B/sub 2/ identical to B( tau /sup -/ to 3h/sup -/2h/sup $/ -2h/sup +/>or=0 pi /sup 0/>or=0K/sup 0/ nu /sub tau /)=(0.115+or-0.013+or-0.006)%, where h is either a charged pi or K meson. The first quoted uncertainties are statistical and the second systematic. (16 refs)

The CMS experiment workflows on StoRM based storage at Tier-1 and Tier-2 centers

Approaching LHC data taking, the CMS experiment is deploying, commissioning and operating the building tools of its grid-based computing infrastructure. The commissioning program includes testing, deployment and operation of various storage solutions to support the computing workflows of the experiment. Recently, some of the Tier-1 and Tier-2 centers supporting the collaboration have started to deploy StoRM based storage systems. These are POSIX-based disk storage systems on top of which StoRM implements the Storage Resource Manager (SRM) version 2 interface allowing for a standard-based access from the Grid. In this notes we briefly describe the experience so far achieved at the CNAF Tier-1 center and at the IFCA Tier-2 center

Phenomenology of neutral heavy leptons

We continue our previous work on the flavour-conserving leptonic decays of the Z boson with neutral heavy leptons (NHL's) in the loops by considering box, vertex, and self-energy diagrams for the muon decay. By inclusion of these loops (they contribute to the input parameter M_W) we can probe the full parameter space spanned by the so-called flavour-conserving mixing parameters ee_(mix), \mu\mu_(mix), \tau\tau_(mix) in a superstring-inspired model of neutrino mass. We compare the results of our analysis with the existing work in this field and conclude that flavour-conserving decays have certain advantages over traditionally considered flavour-violating ones.Comment: submitted to Phys. Rev. D, 30 pages, 9 figures (ps), REVTE