Electroweak Physics, Experimental Aspects

Collider measurements on electroweak physics are summarised. Although the precision on some observables is very high, no deviation from the Standard Model of electroweak interactions is observed. The data allow to set stringent limits on some models for new physics.Comment: Plenary Talk at the UK Phenomenology Workshop on Collider Physics, Durham, 199

Heavy Quarkonium Physics

This report is the result of the collaboration and research effort of the Quarkonium Working Group over the last three years. It provides a comprehensive overview of the state of the art in heavy-quarkonium theory and experiment, covering quarkonium spectroscopy, decay, and production, the determination of QCD parameters from quarkonium observables, quarkonia in media, and the effects on quarkonia of physics beyond the Standard Model. An introduction to common theoretical and experimental tools is included. Future opportunities for research in quarkonium physics are also discussed.Comment: xviii + 487 pages, 260 figures. The full text is also available at the Quarkonium Working Group web page: http://www.qwg.to.infn.i

LHCb hadron trigger and Hcal cell size and length optimization

LHCB 99-035 CALO LHCb Hadron Trigger and HCAL Cell Size and Length Optimization R.I.Dzhelyadin, V.F.Obraztsov, O.P.Yushchenko IHEP, Protvino, Russia Abstract: LHCb hadron trigger performance is studied from the points of view of different ECAL-HCAL matching schemes, cell sizes and HCAL length

Influence of regeneration on the performance of a Brayton refrigeration-cycle working with an ideal Bose-gas

A general regenerative model of the Brayton refrigeration-cycle working with an ideal Bose-gas is used to discuss the influence of both the quantum degeneracy and regeneration on the performance of the cycle. Expressions for some important parameters, such as the refrigeration load, work input, coefficient of performance and minimum pressure-ratio, of the Brayton refrigeration-cycle are derived analytically and used to generate the refrigeration load, work input, coefficient of performance, and relative refrigeration-load versus pressure ratio curves. Moreover, several special cases are discussed in detail. The results obtained here will be helpful to reveal the performance characteristics of the Bose-Brayton refrigeration-cycle, further understand the difference and connection between the classical and quantum Brayton refrigeration-cycles, and theoretically expound the importance of the regeneration application for the Brayton refrigeration-cycle. (c) 2005 Elsevier Ltd. All rights reserved

Search for technicolor with DELPHI

Technicolor represents, a viable alternative to the Higgs mechanism for generating gauge boson masses. Searches fur technicolor particles rho (T) and pi (T) have been performed in the, data collected by the DELPHI experiment at LEP at centre-of-mass energies between 192 and 208 GeV corresponding to an integrated luminosity of 152 pb(-1) Good agreement is observed with the SM expectation in all channels studied. This is translated into an excluded region in the (M-piT, M-rhoT) plane. The (rhoT) production is excluded for all 90 < M-<rho>T < 206.7 GeV/c(2). Assuming a point-like interaction of the (<pi>T) with gauge bosons, an absolute lower limit on the charged pi (T) mass at 95% CL is set at 79.8 GeV/c(2) independently of other parameters of the technicolor model