0000000000609729

AUTHOR

Guido E.

showing 2 related works from this author

Search for di-muon decays of a low-mass Higgs boson in radiative decays of the Gamma(1S)

2013

We search for di-muon decays of a low-mass Higgs boson (A(0)) produced in radiative Gamma(1S) decays. The Gamma(1S) sample is selected by tagging the pion pair in the Gamma(2S, 3S) -> pi(+)pi(-) Gamma(1S) transitions, using a data sample of 92.8 x 10(6) Gamma(2S) and 116.8 x 10(6) Gamma(3S) events collected by the BABAR detector. We find no evidence for A(0) production and set 90% confidence level upper limits on the product branching fraction B(Gamma(1S) -> gamma Lambda(0)) x B(Lambda(0)->mu(+)mu(-)) in the range of (0.28 - 9.7) x 10(-6) for 0.212 gamma Lambda(0), Lambda(0) -> mu(+)mu(-) to set limits on the effective coupling of the b quark to the Lambda(0).

Nuclear and High Energy PhysicsParticle physicsElectron–positron annihilationAstrophysics::High Energy Astrophysical PhenomenaQuarkonium01 natural sciencesBottom quarkHigh Energy Physics - ExperimentNuclear physicsPion0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physicsPhysicsMuon010308 nuclear & particles physicsBranching fractionHigh Energy Physics::PhenomenologyBABAR detectorQuarkoniumHEP3. Good healthPACS: 12.60.Fr 12.60.Jv 13.20.Gd 13.35.BvBaBarHiggs bosonLeptonic decaysFísica nuclearHigh Energy Physics::ExperimentMinimal Supersymmetric Standard Model
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Search for magnetically-induced signatures in the arrival directions of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory

2020

We search for signals of magnetically-induced effects in the arrival directions of ultra-high-energy cosmic rays detected at the Pierre Auger Observatory. We apply two different methods. One is a search for sets of events that show a correlation between their arrival direction and the inverse of their energy, which would be expected if they come from the same point-like source, they have the same electric charge and their deflection is relatively small and coherent. We refer to these sets of events as "multiplets". The second method, called "thrust", is a principal axis analysis aimed to detect the elongated patterns in a region of interest. We study the sensitivity of both methods using a …

electric [charge]AstronomydeflectionThrustmagnetic fieldAstrophysics01 natural sciencesmass spectrumhelium: nucleusbenchmarksurface [detector]Cosmic ray experimentsUltra-high-energy cosmic ray010303 astronomy & astrophysicsPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)astro-ph.HEAstrophysics::Instrumentation and Methods for AstrophysicsCosmic ray experiments; Ultra high energy cosmic raysAugerobservatoryacceleration [cosmic radiation]Astrophysics - High Energy Astrophysical PhenomenasignaturePrincipal axis theoremActive galactic nucleusCherenkov counter: waterAstrophysics::High Energy Astrophysical PhenomenaUHE [cosmic radiation]energy spectrumFOS: Physical sciencesnucleus [helium]Cosmic rayElectric chargeCosmic ray experimentGLASTdetector: fluorescence0103 physical sciencesddc:530thrustcosmic radiation: UHEHigh Energy Physicscosmic radiation: accelerationAGNAstrophysiquePierre Auger Observatoryfluorescence [detector]010308 nuclear & particles physicsdetector: surfacecharge: electricwater [Cherenkov counter]Astronomy and AstrophysicsUltra high energy cosmic raysAstronomiesensitivityGalaxycoherencefluxgamma raymultipletcorrelationExperimental High Energy Physicsgalaxy[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]RAIOS CÓSMICOS
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