In 1998, the four experiments of LEP, i.e. ALEPH, DELPHI, L3 and OPAL, collected data of about 175 pb −1 per experiment at the center-of-mass energy of 189 GeV. Using these data, the mass of W boson was directly measured by reconstructing the decay products of two W bosons from the e+e-collisions. The W mass measurement was combined personally with the results obtained from data at 161, 172, an...

Understanding and estimating the rock stress state has become increasingly important as nowadays numerical models are mainly used as rock engineering design tool. The objective in determining rock stresses may, in many cases, be seen as an interactive process. The type of data needed may change, depending on at what stage an underground project is in. Further more, preliminary measurements may ...

We report on recent measurements of the top quark mass using tt̄ candidate events selected in ≃ 320 pb of data from the ”Run II” operation period of the Tevatron pp̄ collider. More emphasis is given on the best single measurement to date (Mtop = 173.5 +3.9 −3.8 GeV/c ), provided by CDF using the ”lepton plus jets” channel, where one W decays to a lepton-neutrino pair and the other into quarks (to...