0000000000354071

AUTHOR

P. Shatalov

showing 7 related works from this author

Precision measurement of D meson mass differences

2013

Using three- and four-body decays of D mesons produced in semileptonic b-hadron decays, precision measurements of D meson mass differences are made together with a measurement of the D-0 mass. The measurements are based on a dataset corresponding to an integrated luminosity of 1.0 fb(-1) collected in pp collisions at 7 TeV. Using the decay D-0 -> K+K-K-pi(+), the D-0 mass is measured to be M(D-0) = 1864.75 +/- 0.15 (stat) +/- 0.11 (syst) MeV/c(2). The mass differences M(D+) - M(D-0) = 4.76 +/- 0.12 (stat) +/- 0.07 (syst) MeV/c(2), M(D-s(+)) - M(D+) = 98.68 +/- 0.03 (stat) +/- 0.04 (syst) MeV/c(2) are measured using the D-0 -> K+K-pi(+)pi(-) and D-(s)(+) -> K+K-pi(+) modes.

Hadronic decays of charmed mesonsParticle physicsTeoria quàntica de campsGravitacióNuclear and High Energy PhysicsMesonHigh Energy Physics::LatticeNuclear TheoryFOS: Physical sciencesHadrons01 natural sciencesHadron-induced high- and super-high-energy interactions (energy > 10 GeV): Inclusive production with identified hadrons; Leptonic semileptonic and radiative decays of bottom mesons; Charmed mesons (|C|>0 B=0); Hadronic decays of charmed mesonsPartícules (Física nuclear)Settore FIS/04 - Fisica Nucleare e SubnucleareLuminosityHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)0103 physical sciencesD mesonLeptonic semileptonic and radiative decays of bottom meson[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]TOOLTeoria quàntica010306 general physicsHadron-induced high- and super-high-energy interactions (energy > 10 GeV): Inclusive production with identified hadronsNuclear ExperimentQCHadron-Hadron Scattering; Nuclear and High Energy PhysicsPhysicsHadron-Hadron Scattering010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyHadron-induced high- and super-high-energy interactions (energy > 10 GeV): Inclusive production with identified hadronRelativity (Physics)DecayRelativitat (Física)Quantum field theoryFIS/01 - FISICA SPERIMENTALEQuantum theoryLeptonic semileptonic and radiative decays of bottom mesonsDECAY; TOOLFísica nuclearHigh Energy Physics::ExperimentCharmed mesons (|C|>0 B=0)DECAYParticle Physics - ExperimentGravitationJournal of High Energy Physics
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Measurement of hard double-parton interactions inW(???) + 2-jet events at $\sqrt{s}\,=7$ TeV with the ATLAS detector

2013

The production of W bosons in association with two jets in proton–proton collisions at a centre-of-mass energy of √s=7 TeV has been analysed for the presence of double-parton interactions using data corresponding to an integrated luminosity of 36 pb[superscript −1], collected with the ATLAS detector at the Large Hadron Collider. The fraction of events arising from double-parton interactions, f[superscript (D) over subscript DP], has been measured through the p[subscript T] balance between the two jets and amounts to f[superscript (D) over subscript DP] = 0.08 ± 0.01 (stat.) ± 0.02 (sys.) for jets with transverse momentum p[subscript T] > 20 GeV and rapidity |y| < 2.8. This corresponds to a …

Hard-partonCiencias FísicasGeneral Physics and AstronomyParton7. Clean energy01 natural sciencesHigh Energy Physics - Experimentlaw.inventionVector bosonScattering//purl.org/becyt/ford/1 [https]law[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]w bosonNuclear ExperimentQCBosonddc:539PhysicsLuminosity (scattering theory)Large Hadron ColliderSettore FIS/01 - Fisica SperimentaleATLAShard double-parton interactions; ATLAS detectorProbemedicine.anatomical_structureHadronic CollisionsComputingMethodologies_DOCUMENTANDTEXTPROCESSINGLHCCIENCIAS NATURALES Y EXACTASParticle Physics - ExperimentParticle physicsMultiparton InteractionsCiências Naturais::Ciências Físicas530 PhysicsAstrophysics::High Energy Astrophysical Phenomena:Ciências Físicas [Ciências Naturais]ddc:500.25304-Jet EventsNuclear physicsAtlas (anatomy)0103 physical sciencesmedicineddc:530RapidityHigh Energy Physics010306 general physicsColliderCiencias ExactasCalorimeterScience & TechnologyATLAS detector010308 nuclear & particles physicsMeasurementsHigh Energy Physics::PhenomenologyFísica//purl.org/becyt/ford/1.3 [https]QCDAstronomíaHADRON-HADRON COLLISIONSExperimental High Energy Physicsproton-proton collisionsHigh Energy Physics::ExperimentCollider
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Differential branching fraction and angular analysis of the decay $B^{0} \to K^{*0} \mu^{+}\mu^{-}$

2013

The angular distribution and differential branching fraction of the decay B-0 -> K*(0)mu(+)mu(-) are studied using a data sample, collected by the LHCb experiment in pp collisions at root s = 7 TeV, corresponding to an integrated luminosity of 1.0 fb(-1). Several angular observables are measured in bins of the dimuon invariant mass squared, q(2). A first measurement of the zero-crossing point of the forward-backward asymmetry of the dimuon system is also presented. The zero-crossing point is measured to be q(0)(2) = 4.9 +/- 0.9 GeV2/c(4), where the uncertainty is the sum of statistical and systematic uncertainties. The results are consistent with the Standard Model predictions.

K-ASTERISK-L(+)L(-)12.15.Mm01 natural sciencesB physicsLuminositydecayHigh Energy Physics - ExperimentSettore FIS/04 - Fisica Nucleare e SubnucleareNeutral currentFlavor physics[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Invariant massQCDetectors de radiaciómedia_commonPhysicsB0 mesonHadron-induced high- and super-high-energy interactions (energy > 10 GeV): Inclusive production with identified hadronObservableCP violationFIS/01 - FISICA SPERIMENTALENuclear countersLeptonic semileptonic and radiative decays of bottom mesonsFísica nuclearLHCB physics; Flavor physics; Flavour Changing Neutral Currents; Hadron-Hadron Scattering; Rare decayParticle Physics - ExperimentParticle physicsNuclear and High Energy Physicsmedia_common.quotation_subject14.40.NdFlavour Changing Neutral CurrentsHadronsAsymmetryPartícules (Física nuclear)Standard ModelB physics; Flavor physics; Flavour Changing Neutral Currents; Hadron-Hadron Scattering; Rare decay; Nuclear and High Energy PhysicsNeutral currentsAngular distributionASYMMETRIES0103 physical sciencesLeptonic semileptonic and radiative decays of bottom mesonLHC flavour physics010306 general physicsHadron-induced high- and super-high-energy interactions (energy > 10 GeV): Inclusive production with identified hadronsB0 meson; decay; LHCb; LHCHadron-Hadron Scattering010308 nuclear & particles physicsBranching fractionCromodinàmica quànticaLHCbRare decay13.20.HeBottom mesons (|B|>0); Leptonic semileptonic and radiative decays of bottom mesons; Hadron-induced high- and super-high-energy interactions (energy > 10 GeV): Inclusive production with identified hadrons; Neutral currents; 14.40.Nd; 13.20.He; 13.85.Ni; 12.15.Mm;Bottom mesons (|B|>0)High Energy Physics::Experiment13.85.NiDifferential (mathematics)FIS/04 - FISICA NUCLEARE E SUBNUCLEAREQuantum chromodynamicsexperimental results
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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
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Dynamics of isolated-photon plus jet production in pp collisions at s=7 TeV with the ATLAS detector

2013

The dynamics of isolated-photon plus jet production in pp collisions at a centre-of-mass energy of 7 TeV has been studied with the ATLAS detector at the LHC using an integrated luminosity of 37 pb( ...

Quantum chromodynamicsPhysicsNuclear and High Energy PhysicsLarge Hadron ColliderPhotonPhysics::Instrumentation and Detectors010308 nuclear & particles physicsAtlas (topology)Atlas detectorAstrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::Phenomenology01 natural sciences7. Clean energyNuclear physics0103 physical sciencesHigh Energy Physics::ExperimentAngular dependence010306 general physicsBosonNuclear Physics B
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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)
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Observation of the suppressed ADS modes B±→[π±K∓π+π−]DK± and B±→[π±K∓π+π−]Dπ±

2013

An analysis of and B-+/- -> DK +/- and B-+/- -> D pi(+/-) decays is presented where the D meson is reconstructed in the four-body final state K-+/-pi(-/+)pi(+)pi(-). Using LHCb data corresponding to an integrated luminosity of 1.0 fb(-1), first observations are made of the suppressed ADS modes B-+/- ->[pi K-+/-(-/+)pi(+)pi(-)](D)K-+/- and B +/- -> [pi K-+/-(-/+)pi(+)pi(-)](D)pi(+/-) with a significance of 5.1 sigma and greater than 10 sigma, respectively. Measurements of CP asymmetries and CP-conserving ratios of partial widths from this family of decays are also performed. The magnitude of the ratio between the suppressed and favoured B-+/- -> DK +/- amplitudes is determined to be r(B)(K) …

Nuclear physicsPhysicsNuclear and High Energy Physics010308 nuclear & particles physics0103 physical sciencesD mesonPiAnalytical chemistryCP violation010306 general physics01 natural sciencesPhysics Letters B
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