STUDY OF THE NEUTRAL DECAYS OF THE KL FOR THE CP VIOLATION MEASUREMENT AT KLOE

2000/2001XIV Ciclo1972Versione digitalizzata della tesi di dottorato cartacea

Oscilacije Bs0

For a long time, the B0 s -B¯0 s system has eluded a complete investigation of its observables. Only recently, the Tevatron experiments have accumulated sizable B0 s samples which allow a direct and precise study of the system properties. This contribution reviews the most up-to-date measurements by the CDF and DØ Collaborations of the B0 s -B¯0 s system parameters: the mass and decay-width differences, ∆ms and ∆Γs between the heavy and light B0 s mass eigenstates, the average decay width Γs and the CP-violating phase in the mixing φs.Dugo je vremena sustav B0 s -B¯0 s bio nedokučiv potpunim istraživanjima svojih fizičkih veličina. Tek su nedavna mjerenja na Tevatronu sakupila poveće uzorke B0 s koji omogućuju izravno i točno proučavanje svojstava tog sustava. Ovdje se daje pregled najnovijih mjerenja parametara sustava B0 s -B¯0 s koja su obavila suradnje DØ i CDF: razlike masa i širina raspada teškog i lakog svojstvenog stanja B0 s , ∆ms i ∆Γs, prosječne širine raspada, Γs i faze miješanja koja krši CP, φs

Oscilacije Bs0

For a long time, the B0 s -B¯0 s system has eluded a complete investigation of its observables. Only recently, the Tevatron experiments have accumulated sizable B0 s samples which allow a direct and precise study of the system properties. This contribution reviews the most up-to-date measurements by the CDF and DØ Collaborations of the B0 s -B¯0 s system parameters: the mass and decay-width differences, ∆ms and ∆Γs between the heavy and light B0 s mass eigenstates, the average decay width Γs and the CP-violating phase in the mixing φs.Dugo je vremena sustav B0 s -B¯0 s bio nedokučiv potpunim istraživanjima svojih fizičkih veličina. Tek su nedavna mjerenja na Tevatronu sakupila poveće uzorke B0 s koji omogućuju izravno i točno proučavanje svojstava tog sustava. Ovdje se daje pregled najnovijih mjerenja parametara sustava B0 s -B¯0 s koja su obavila suradnje DØ i CDF: razlike masa i širina raspada teškog i lakog svojstvenog stanja B0 s , ∆ms i ∆Γs, prosječne širine raspada, Γs i faze miješanja koja krši CP, φs

Charged Particle Tracking in Real-Time Using a Full-Mesh Data Delivery Architecture and Associative Memory Techniques

We present a flexible and scalable approach to address the challenges of charged particle track reconstruction in real-time event filters (Level-1 triggers) in collider physics experiments. The method described here is based on a full-mesh architecture for data distribution and relies on the Associative Memory approach to implement a pattern recognition algorithm that quickly identifies and organizes hits associated to trajectories of particles originating from particle collisions. We describe a successful implementation of a demonstration system composed of several innovative hardware and algorithmic elements. The implementation of a full-size system relies on the assumption that an Associative Memory device with the sufficient pattern density becomes available in the future, either through a dedicated ASIC or a modern FPGA. We demonstrate excellent performance in terms of track reconstruction efficiency, purity, momentum resolution, and processing time measured with data from a simulated LHC-like tracking detector

Towards a Muon Collider

A muon collider would enable the big jump ahead in energy reach that is needed for a fruitful exploration of fundamental interactions. The challenges of producing muon collisions at high luminosity and 10 TeV centre of mass energy are being investigated by the recently-formed International Muon Collider Collaboration. This Review summarises the status and the recent advances on muon colliders design, physics and detector studies. The aim is to provide a global perspective of the field and to outline directions for future work.Comment: 118 pages, 103 figure