Search results for "acceleratori"

showing 2 items of 2 documents

The beam and detector for the NA48 neutral kaon CP violation experiment at CERN

2007

The beam and detector, used for the NA48 experiment, devoted to the measurement of Re (ε{lunate}′ / ε{lunate}), and for the NA48/1 experiment on rare KS and neutral hyperon decays, are described. © 2007 Elsevier B.V. All rights reserved.

Nuclear and High Energy PhysicsParticle physicsacceleratoriNA62 experiment01 natural sciencesLIQUID-KRYPTON CALORIMETERDECAYSNOfasci di particelleKaon beamsNuclear physicsDRIFT CHAMBER ELECTRONICSCERNViolazione di CP0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Kaon decaysdetector; CP violation; Kaon decays010306 general physicsInstrumentation07.05.Fb; 13.20.Eb; 29.40.Vj; 29.27.EgPhysicsCalorimeterLarge Hadron ColliderdetectorCRYSTAL010308 nuclear & particles physicsLIQUID-KRYPTON CALORIMETER; DRIFT CHAMBER ELECTRONICS; PROTON TAGGING DETECTOR; PC FARM; TRIGGER; SYSTEM; READOUT; DECAYS; PERFORMANCE; CRYSTALDetectorPC FARMHyperonNA48 experimentDetectorsMagnetic spectrometerPERFORMANCErivelatoriREADOUTkaon decayCalorimeterTriggerCP violationfasci di particelle; acceleratori; CERN; Violazione di CP; rivelatori; kaon decayCP violationHigh Energy Physics::ExperimentParticle Physics - ExperimentPROTON TAGGING DETECTORSYSTEMBeam (structure)
researchProduct

First observation and branching fraction and decay parameter measurements of the weak radiative decay Xi0 -> Lambda e+ e-

2007

The weak radiative decay Xi0 --> Lambda e+e- has been detected for the first time. We find 412 candidates in the signal region, with an estimated background of 15 +/- 5 events. We determine the branching fraction B(Xi0 --> Lambda e+e-) = [7.6 +/- 0.4(stat) +/- 0.4(syst) +/- 0.2(norm)] x 10^{-6}, consistent with an internal bremsstrahlung process, and the decay asymmetry parameter alpha_{XiLambdaee} = -0.8 +/- 0.2, consistent with that of Xi0 --> Lambda gamma. The charge conjugate reaction Xi0_bar --> Lambda_bar e+e- has also been observed.

Nuclear and High Energy Physicsmedia_common.quotation_subjectSignal regionRadiative decayXi0 hyperonAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesAsymmetryiperoniacceleratori di particelleNOHigh Energy Physics - Experimentmesoni K0103 physical sciences010306 general physicsXi0 hyperon; radiative decayparticelle elementarimedia_commonPhysicsdecadimenti010308 nuclear & particles physicsBranching fractionradiative decayHigh Energy Physics::PhenomenologyBremsstrahlungmesoni K; iperoni; decadimenti; particelle elementari; acceleratori di particelleHigh Energy Physics::ExperimentAtomic physicsParticle Physics - ExperimentConjugate
researchProduct