412 research outputs found
Impact on calorimeters design, due to ILC staging at 250 GeV centre of mass
No full textInternational audienceThe staging of the ILC accelerator project to run at 250 GeV centre-of-mass energy, impacts directly the calorimeters design. The paper describes some of the consequences and draws the overall picture of the design in view of this impact
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Recent results for Mark III
No full textThis paper presents recent results from the Mark III detector at SPEAR, in the open charm sector. The first topic discussed is the reanalysis of the direct measurement of the D hadronic branching fractions, where a detailed study has been made of the Cabibbo suppressed and multi-..pi../sup 0/'s D decays backgrounds in the double tag sample. Next, the Dalitz plot analysis of the D decays to K..pi pi.. is presented, leading to the relative fractions of three-body versus pseudoscalarvector decays. 7 refs., 5 figs
Interprétation semi-microscopique de la diffusion élastique et inélastique de nucléons par 208Pb
No full textStarting from the calculations by Jeukenne, Lejeune and Mahaux of the optical potential in nuclear matter, a microscopic calculation for elastic and inelastic nucleon scattering from 208Pb in the energy range 8.5-61 MeV is presented. A special consideration is given to the energy dependence of the nucleon excitation strength for the first inelastic channel.Partant du potentiel optique microscopique calculé dans la matière nucléaire par Jeukenne, Lejeune et Mahaux, nous interprétons la diffusion élastique et inélastique de nucléons par 208Pb dans le domaine d'énergie 8,5 MeV-61 MeV. Nous insistons en particulier sur la dépendance en énergie de la probabilité d'excitation du premier état excité
Silicon Calorimeters
No full textInternational audienceWe review the development of silicon-based calorimeters from the very first applications of small calorimeters used in collider experiments to the large-scale systems that are being designed today. We discuss silicon-based electromagnetic calorimeters for future e−e+ colliders and for the upgrade of the CMS experiment's endcap calorimeter to be used in the high-luminosity phase of the LHC. We present the intrinsic advantages of silicon as an active detector material and highlight the enabling technologies that have made calorimeters with very high channel densities feasible. We end by discussing the outlook for further extensions to the silicon calorimeter concept, such as calorimeters with fine-pitched pixel detectors
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