0000000000960522

AUTHOR

W. Silva

showing 4 related works from this author

Antimicrobial action of ozonated water and photodynamic therapy with sonic activation in root canals infected with Enterococcus faecalis

2022

New protocols are constantly being tested in the search for complete disinfection of root canals without the undesirable effects of sodium hypochlorite. This study evaluated the antimicrobial effect of ozonated water and photodynamic therapy (PDT) with so

General DentistryUNESCO:CIENCIAS MÉDICAS
researchProduct

Searches for violation of lepton flavour and baryon number in tau lepton decays at LHCb

2013

Searches for the lepton flavour violating decay tau(-) -> mu(-)mu(+)mu(-) and the lepton flavour and baryon number violating decays tau(-) -> (p) over bar mu(+)mu(-) and tau(-) -> p mu(-)mu(-) have been carried out using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb(-1), taken by the LHCb experiment at root s = 7 TeV. No evidence has been found for any signal, and limits have been set at 90% confidence level on the branching fractions: B(tau(-) -> mu(-)mu(+)mu(-) mu(+)mu(-)) p mu(-)mu(-)) (p) over bar mu(+)mu(-) and tau(-) -> p mu(-)mu(-) decay modes represent the first direct experimental limits on these channels.

Nuclear and High Energy PhysicsParticle physicsFlavourDecays of leptons; Global symmetries (e.g. baryon number lepton number); 13.35.-r; 11.30.Fs;FOS: Physical sciences01 natural sciencesPartícules (Física nuclear)High Energy Physics - ExperimentSettore FIS/04 - Fisica Nucleare e SubnucleareNuclear physicslepton number)High Energy Physics - Experiment (hep-ex)Violació CP (Física nuclear)0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]LHC flavour physics lepton number11.30.FsNeutrinsNeutrinos010306 general physicsParticles (Nuclear physics)Physics13.35.-rDecays of leptonsLarge Hadron Collider010308 nuclear & particles physicsGlobal symmetries (e.g. baryon number lepton number)Leptons (Física nuclear)Global symmetries (e.g.High Energy Physics::Phenomenologybaryon numberDecays of lepton3. Good healthFIS/01 - FISICA SPERIMENTALELeptons (Nuclear physics)Física nuclearHigh Energy Physics::ExperimentBaryon numberNeutrino11.30.FFIS/04 - FISICA NUCLEARE E SUBNUCLEAREParticle Physics - ExperimentLeptonCP violation (Nuclear physics)Physics Letters B
researchProduct

Measurement of CP asymmetries in the decays B0 → K*0 μ+μ- and B+ → K+ μ+μ-

2014

The direct CP asymmetries of the decays B 0 → K *0 μ + μ − and B + → K + μ + μ − are measured using pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected with the LHCb detector. The respective control modes B 0 → J/ψK *0 and B + → J/ψK + are used to account for detection and production asymmetries. The measurements are made in several intervals of μ + μ − invariant mass squared, with the ϕ(1020) and charmonium resonance regions excluded. Under the hypothesis of zero CP asymmetry in the control modes, the average values of the asymmetries are ACP(B0→K∗0μ+μ−)=−0.035±0.024±0.003,ACP(B+→K+μ+μ−)=0.012±0.017±0.001, where the first uncertainties are statistical and the …

Nuclear and High Energy PhysicsParticle physicsB physicmedia_common.quotation_subject14.40.NdFlavour Changing Neutral CurrentsLHCb - Abteilung HofmannHadrons01 natural sciencesAsymmetryB physicsNOPhysics Particles & FieldsLuminosityStandard Model0103 physical sciencesLeptonic semileptonic and radiative decays of bottom mesonInvariant mass010306 general physicsLarge Hadron Collider (France and Switzerland)QCmedia_commonPhysicsFlavour Changing Neutral CurrentScience & TechnologyHadron-Hadron Scattering010308 nuclear & particles physicsPhysicsHigh Energy Physics::PhenomenologyGran Col·lisionador d'HadronsParticle physicsResonanceCharge conjugation parity time reversal and other discrete symmetrieLHCbCP violationRare decay13.20.HePhysical SciencesBottom mesons (|B|>0)11.30.ErFísica nuclearB physics; CP violation; Flavour Changing Neutral Currents; Hadron-Hadron Scattering; Rare decayProduction (computer science)High Energy Physics::ExperimentLHCFísica de partículesExperiments
researchProduct

Determination of the $X(3872)$ meson quantum numbers

2013

The quantum numbers of the X(3872) meson are determined to be J(PC) = 1(++) based on angular correlations in B+ -> X(3872)K+ decays, where X(3872) -> pi(+) pi(-) j/psi and J/psi -> pi(+) mu(-). The data correspond to 1.0 fb(-1) of pp collisions collected by the LHCb detector. The only alternative assignment allowed by previous measurements J(PC) = 2(-+) is rejected with a confidence level equivalent to more than 8 Gaussian standard deviations using a likelihood-ratio test in the full angular phase space. This result favors exotic explanations of the X(3872) state.

Particle physicsCOLLISIONSMesonExotic mesonHigh Energy Physics::LatticeGaussian14.40.NdNuclear TheoryGeneral Physics and AstronomyFOS: Physical sciences01 natural sciencesSettore FIS/04 - Fisica Nucleare e SubnucleareHigh Energy Physics - ExperimentNuclear physicsPhysics and Astronomy (all)symbols.namesakeHigh Energy Physics - Experiment (hep-ex)14.40.RtHadronic decays of bottom meson0103 physical sciences13.25.GvPi[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]CollisionsNuclear Experiment010306 general physicsPhysics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyParticle physicsState (functional analysis)Exotic hadrons Charmonium Hadron ColliderQuantum numberLHCbFIS/01 - FISICA SPERIMENTALEPhase space13.25.HwsymbolsBottom mesons (|B|>0)TetraquarkFísica nuclearHigh Energy Physics::ExperimentLHCFísica de partículesExperimentsFIS/04 - FISICA NUCLEARE E SUBNUCLEAREParticle Physics - ExperimentHadronic decays of J/ψ Υ and other quarkoniaX(3872)
researchProduct