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Laboratoire de physique des accélérateurs de particules

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Publications associées (370)

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Measurement of the photon structure function F2 γ with the L3 detector at LEP

Qian Wang, Aurelio Bay, Horst Vogel, Eduardo Sanchez, Zhirui Xu, Werner Lustermann, Liang Sun, Jian Zhao, Ji Hyun Kim, Zheng Wang, Matthias Weber, Xiao Wang

The e+e-→e+e-hadrons reaction, where one of the two electrons is detected in a low polar-angle calorimeter, is analysed in order to measure the hadronic photon structure function F2 γ. The full high-energy and high-luminosity data set, collected with the L ...

2005

Cargese lectures on extra-dimensions

Riccardo Rattazzi

I give a pedagogical introduction to the concepts and the tools that are necessary to study particle physics models in higher dimensions. I then give a more detailed presentation of warped compactifications and discuss their possible relevance to the hiera ...

Springer2005

Development of a beam condition monitor system for the experimental areas of the LHC using CVD diamond

The CERN Large Hadron Collider (LHC) will store 2808 bunches per colliding beam, each bunch consisting of 1011 protons at an energy of 7 TeV. If there is a failure in an element of the accelerator, the resulting beam losses could cause damages not only to ...

EPFL2004

Gauge-Higgs unification in orbifold models

Claudio Scrucca, Andrea Wulzer

Six-dimensional orbifold models where the Higgs field is identified with some internal component of a gauge field are considered. We classify all possible T-2/Z(N) orbifold constructions based on a SU(3) electroweak gauge symmetry. Depending on the orbifol ...

2004

Measurement of the Z-boson mass using e+e- →Zγ events at centre-of-mass energies above the Z pole

Aurelio Bay

Events from the e+e-→Zγ process with hard initial-state radiation collected with the L3 detector at centre-of-mass energies between 183 and 209 GeV are used to measure the mass of the Z boson. Decays of the Z boson into hadrons or muon pairs are considered ...

2004

Measurement of the atmospheric muon spectrum from 20 to 3000 GeV

Aurelio Bay

The absolute muon flux between 20 and 3000 GeV is measured with the L3 magnetic muon spectrometer for zenith angles ranging from 0°to 58°. Due to the large exposure of about 150 m2sr d, and the excellent momentum resolution of the L3 muon chambers, a preci ...

2004

Synchrotron radiation in radiology: radiology techniques based on synchrotron sources

Giorgio Margaritondo, Reto Meuli

The characteristics of synchrotron X-ray sources-quite different from those of conventional sources-are exploited by several new imaging techniques. These techniques expand the capabilities of conventional radiology and find interesting application in spec ...

2004

Geant4—a simulation toolkit

Sebastiana Gianì

Geant4 is a toolkit for simulating the passage of particles through matter. It includes a complete range of functionality including tracking, geometry, physics models and hits. The physics processes offered cover a comprehensive range, including electromag ...

2003

Z boson pair-production at LEP

Aurelio Bay

Events stemming from the pair-production of Z bosons in e+e - collisions are studied using 217.4 pb-1 of data collected with the L3 detector at centre-of-mass energies from 200 GeV up to 209 GeV. The special case of events with b quarks is also investigate ...

2003

Measurement of W polarisation at LEP

Aurelio Bay

The three different helicity states of W bosons produced in the reaction e+e- → W+W- → lvqq̄′ at LEP are studied using leptonic and hadronic W decays. Data at centre-of-mass energies √s = 183-209 GeV are used to measure the polarisation of W bosons, and it ...

2003