0000000000847233

AUTHOR

S. J. Dejong

showing 3 related works from this author

A study of the effect of molecular and aerosol conditions in the atmosphere on air fluorescence measurements at the Pierre Auger Observatory

2010

The air fluorescence detector of the Pierre Auger Observatory is designed to perforin calorimetric measurements of extensive air showers created by Cosmic rays of above 10(18) eV. To correct these measurements for the effects introduced by atmospheric fluctuations, the Observatory contains a group Of monitoring instruments to record atmospheric conditions across the detector site, ail area exceeding 3000 km(2). The atmospheric data are used extensively in the reconstruction of air showers, and are particularly important for the correct determination of shower energies and the depths of shower maxima. This paper contains a summary of the molecular and aerosol conditions measured at the Pierr…

Angstrom exponentAstronomyAstrophysics01 natural sciencesAugerCROSS-SECTIONSCOSMIC-RAY SHOWERSObservatoryDEPENDENCEHigh-Energy Cosmic Ray010303 astronomy & astrophysicsPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Lidar[SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]ANGSTROM EXPONENTPierre Auger ObservatoryBi-static lidarELECTRONSComputingMethodologies_DOCUMENTANDTEXTPROCESSINGMULTIPLE-SCATTERINGLight emissionFísica nuclearAstrophysics - Instrumentation and Methods for AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaLIGHT-EMISSIONAstrophysics - Cosmology and Nongalactic Astrophysics[PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Cosmology and Nongalactic Astrophysics (astro-ph.CO)Extensive air showerFOS: Physical sciencesCosmic raySURFACE DETECTORAir fluorescence method0103 physical sciencesExtensive air showersRECONSTRUCTIONAerosolInstrumentation and Methods for Astrophysics (astro-ph.IM)Cosmic raysPierre Auger ObservatoryAerosolsCalorimeter (particle physics)Atmospheric effect010308 nuclear & particles physicsAtmosphereFísicaAstronomy and AstrophysicsCosmic rays; Extensive air showers; Air fluorescence method; Atmosphere; Aerosols; Lidar; Bi-static lidarCosmic rayNITROGENAir showerFluorescence Telescopes13. Climate actionExperimental High Energy PhysicsAEROSSOL
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Evidence for s-channel single top quark production in pp¯ collisions at s=1.96 TeV

2013

We present measurements of the cross sections for the two main production modes of single top quarks in p (p) over bar collisions at root s = 1.96 TeV in the Run II data collected with the DO detector at the Fermilab Tevatron Collider, corresponding to an integrated luminosity of 9.7 fb(-1). The s-channel cross section is measured to be sigma(p (p) over bar -> tb + X) = 1.10(-0.31)(+0.33) pb with no assumptions on the value of the t-channel cross section. Similarly, the t-channel cross section is measured to be sigma(p (p) over bar -> tqb + X) = 3.07(-0.49)(+0.54) pb. We also measure the s + t combined cross section as sigma(p (p) over bar -> tb + X, tqb + X) = 4.11(-0.55)(+0.60) ph and set…

PhysicsNuclear and High Energy PhysicsTop quarkParticle physicsLuminosity (scattering theory)010308 nuclear & particles physicsCabibbo–Kobayashi–Maskawa matrixTevatron01 natural sciences7. Clean energylaw.inventionNuclear physicsCross section (physics)law0103 physical sciencesFermilab010306 general physicsColliderBar (unit)Physics Letters B
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Properties ofL=1B1andB2*Mesons

2007

This Letter presents the first strong evidence for the resolution of the excited B mesons B-1 and B-2(*) as two separate states in fully reconstructed decays to B+(*())pi(-). The mass of B-1 is measured to be 5720.6 +/- 2.4 +/- 1.4 MeV/c(2) and the mass difference Delta M between B-2* and B-1 is 26.2 +/- 3.1 +/- 0: 9 MeV/c(2), giving the mass of the B-2* as 5746.8 +/- 2.4 +/- 1.7 MeV/c(2). The production rate for B-1 and B-2* mesons is determined to be a fraction (13.9 +/- 1.9 +/- 3.2)% of the production rate of the B+ meson.

PhysicsParticle propertiesMeson010308 nuclear & particles physicsHadronAnalytical chemistryGeneral Physics and AstronomyElementary particle01 natural sciencesExcited state0103 physical sciencesB mesonAtomic physics010306 general physicsProduction rateBosonPhysical Review Letters
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