120201082
Radiation damage effects in the NA60 silicon pixel detectors
Abstract The NA60 experiment studies open charm and prompt dimuon production in proton–nucleus and nucleus–nucleus collisions at the CERN SPS. Downstream of the target system a silicon pixel telescope made with p-on-n silicon sensors measures the charged tracks originating from the collisions. During the 2003 data taking period with indium–indium collisions a significant radiation dose was collected. Simulations done before the run predicted a fluence of up to several 10 13 1 MeV n eq cm - 2 in the most affected regions of the sensors and a difference of approximately a factor ten between the inner and outer regions of certain sensor chips. The inhomogeneous distribution of the fluence leads to type inversion in some regions of the sensors while other regions of the same sensors kept their initial behaviour. The depletion voltages and leakage currents were measured during the run and have been compared with the estimates we had previously made. This paper shows simulation results of fluence and radiation damage and comparisons with the measurements performed throughout the data taking period.
121035571
Low mass dimuon production in Indium-Indium collisions at 158 A GeV
Abstract.The NA60 experiment studies open charm and prompt dimuon production in proton-nucleus and nucleus-nucleus collisions at the CERN SPS. During 2003 the experiment collected data in Indium-Indium collisions at 158 GeV per nucleon. Almost 240 million dimuon events were recorded. New results on J/$\psi$ suppression, open-charm production and low mass dimuons should help clarify some interesting questions left open by previous experiments. After a brief detector description, this paper focuses on the analysis of the low mass dimuons. Preliminary results are presented on the $\phi/\omega$ production cross section ratios and on the $\phi$ transverse momentum distributions, both as a function of collision centrality.
125411098
Radiation studies for the Readout Electronic of the ALICE Dimuon Forward Spectrometer
198461351
Muons in the calorimeters: Energy loss corrections and muon tagging
120473193
Trigger of low pT muons with the ATLAS hadronic calorimeter
Abstract A strategy for tagging muons with the Tile Calorimeter at the second level trigger (LVL2) of the ATLAS experiment is presented and its efficiency and mistagging fraction are discussed. It is demonstrated that the Tile Calorimeter can identify muons with good efficiency down to p T =2 GeV /c where the stand-alone muon spectrometer has zero efficiency. A method of exploiting all information available at LVL2 to reduce spurious muon-tag and measure the candidate muon momentum is discussed. The effectiveness of this method is tested, in particular, in the case of b b events at low Large Hadron Collider luminosity (10 33 cm −1 s −2 ) with full simulation of experimental conditions.