Search results for "fixed target experiment"

showing 2 items of 2 documents

The COMPASS Setup for Physics with Hadron Beams

2015

The main characteristics of the COMPASS experimental setup for physics with hadron beams are described. This setup was designed to perform exclusive measurements of processes with several charged and/or neutral particles in the final state. Making use of a large part of the apparatus that was previously built for spin structure studies with a muon beam, it also features a new target system as well as new or upgraded detectors. The hadron setup is able to operate at the high incident hadron flux available at CERN. It is characterised by large angular and momentum coverages, large and nearly flat acceptances, and good two and three-particle mass resolutions. In 2008 and 2009 it was successful…

Particle physicsCalorimetry; Data acquisition and reconstruction; Fixed target experiment for hadron spectroscopy; Front-end electronics; Micro Pattern detectors and Drift chambers; Monte-Carlo simulation; RICH; Instrumentation; Nuclear and High Energy PhysicsNuclear and High Energy PhysicsPhysics - Instrumentation and DetectorsPhysics::Instrumentation and DetectorsHadronFOS: Physical sciencesMonte-Carlo simulation[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]Calorimetryacquisition and reconstruction01 natural sciences7. Clean energyMicro Pattern detectors and Drift chambersHigh Energy Physics - ExperimentNuclear physicsMomentumHigh Energy Physics - Experiment (hep-ex)CompassHadron spectroscopy0103 physical sciencesDetectors and Experimental Techniques010306 general physicsRICHInstrumentationFixed target experiment for hadron spectroscopyPhysicsDataLarge Hadron Collider010308 nuclear & particles physicsMicroMegas detectorFront-end electronicsInstrumentation and Detectors (physics.ins-det)Micro Pattern detectorsand Drift chambersData acquisition and reconstructionGas electron multiplierPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentParticle Physics - ExperimentBeam (structure)Front-end electronicMicro Pattern detectors and Drift chamber
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First observation and study of the K± → π±π0e+e− decay

2018

The NA48/2 experiment at CERN reports the first observation of the K-+/- -> pi(+/-)pi(0)e(+)e(-) decay from an exposure of 1.7 x 10(11) charged kaon decays recorded in 2003-2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region, BR(K-+/- -> pi(+/-)pi(0)e(+)e(-)) = (4.24 +/- 0.14) x 10(-6). The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated.

rare decayNuclear and High Energy PhysicsChiral perturbation theoryCP violation; Monte-Carlo; searchAstronomy & AstrophysicsSpace (mathematics)quark mixing01 natural sciencesPartícules (Física nuclear)Charged Kaon decaysPhysics Particles & FieldsCharged Kaon decays quark mixing radiative kaon decay chiral perturbation theoryEconomica0202 Atomic Molecular Nuclear Particle And Plasma PhysicsViolació CP (Física nuclear)MONTE-CARLOSEARCH0103 physical sciencesKaon decaysradiative kaon decay010306 general physicsPhysicsScience & Technology010308 nuclear & particles physicsBranching fractionPhysicsKaon decays Chiral Perturbation TheoryAmbientaleK mesonNuclear & Particles PhysicsChiral Perturbation Theorylcsh:QC1-999fixed target experimentPhysics NuclearPhysical SciencesK meson rare decay fixed target experimentCP violationHigh Energy Physics::ExperimentCP VIOLATIONAtomic physicslcsh:PhysicsPhysics Letters B
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