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Observation of s-Channel Production of Single Top Quarks at the Tevatron

2014

We report the first observation of single-top-quark production in the s channel through the combination of the CDF and D0 measurements of the cross section in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total integrated luminosities of up to 9.7fb-1 per experiment. The measured cross section is σs=1.29-0.24+0.26pb. The probability of observing a statistical fluctuation of the background to a cross section of the observed size or larger is 1.8×10-10, corresponding to a significance of 6.3 standard deviations for the presence of an s-channel contribution to the production of single-top quarks. © 2014 American Physical Society.

P(P)OVER-BAR COLLISIONSTevatronGeneral Physics and AstronomyCHANGING NEUTRAL CURRENTS01 natural sciences7. Clean energyStandard deviationHigh Energy Physics - ExperimentCHANGING NEUTRAL CURRENTS; B-JET IDENTIFICATION; P(P)OVER-BAR COLLISIONS; FERMILAB-TEVATRON; ROOT-S=1.96 TEV; COUPLINGS; DETECTOR; SEARCH; FB(-1); DECAYSHigh Energy Physics - Experiment (hep-ex)[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]SCALEPhysicsB-JET IDENTIFICATION02 Physical SciencesPhysicsSigmaCOUPLINGSROOT-S=1.96 TEVPhysical SciencesComputingMethodologies_DOCUMENTANDTEXTPROCESSINGProduction (computer science)Communication channelFERMILAB-TEVATRONQuarkParticle physicsGeneral PhysicsPhysics MultidisciplinaryFOS: Physical sciencesParticle Physics; Collider Physics; Top quark; Single top productionDECAYSCDF CollaborationNuclear physicsPhysics and Astronomy (all)Cross section (physics)SEARCH0103 physical sciencesParticle Physics010306 general physicsDETECTORFB(-1)Science & Technology010308 nuclear & particles physicshep-exTop quarkCollider PhysicsExperimental High Energy PhysicsSingle top productionHigh Energy Physics::ExperimentEnergy (signal processing)D0 Collaboration
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