0000000000277520

AUTHOR

Xiaoning Li

showing 3 related works from this author

Combined Analysis of Neutrino and Antineutrino Oscillations at T2K.

2017

T2K reports its first results in the search for CP violation in neutrino oscillations using appearance and disappearance channels for neutrino- and antineutrino-mode beams. The data include all runs from January 2010 to May 2016 and comprise 7.482 ×10^(20) protons on target in neutrino mode, which yielded in the far detector 32 e-like and 135 μ-like events, and 7.471 × 10^(20) protons on target in antineutrino mode, which yielded 4 e-like and 66 μ-like events. Reactor measurements of sin(2)2θ(13) have been used as an additional constraint. The one-dimensional confidence interval at 90% for the phase δCP spans the range (−3.13, −0.39) for normal mass ordering. The CP conservation hypothesis …

Particle physicsGeneral PhysicsNeutrino oscillations; CP violation; Neutrino detectors530 PhysicsPhysics MultidisciplinaryFOS: Physical sciencesGeneral Physics and Astronomy01 natural sciences7. Clean energy09 EngineeringHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)Physics and Astronomy (all)0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Neutrino detectors010306 general physicsNeutrino oscillationGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)01 Mathematical SciencesComputingMilieux_MISCELLANEOUSQCPhysicsScience & Technology02 Physical Sciences010308 nuclear & particles physicshep-exNeutrino oscillationsPhysicsCP violationNeutrino detectorantineutrino oscillationsT2K CollaborationPhysical SciencesCP violationNeutrinoPhysical review letters
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Measurement of double charmonium production ine+e−annihilations ats=10.6  GeV

2005

We study $e^+e^-\to J/\psi c\bar{c}$ by measuring the invariant mass distribution recoiling against fully reconstructed $J/\psi$ decays, using 124 fb$^{-1}$ of data collected with a center-of-mass energy of 10.6 GeV with the $BaBar$ detector. We observe signals for $\eta_c(1S)$, $\chi_{c0}$, and $\eta_c(2S)$ in the recoil mass distribution, thus confirming previous measurements. We measure $\sigma(e^+e^-\to J/\psi+c\bar{c}) {\cal B} (c\bar{c} \to >2 charged)$ to be $17.6\pm2.8 (stat)^{+1.5}_{-2.1}(syst)$ fb, $ 10.3\pm2.5(stat)^{+1.4}_{-1.8}syst)$ fb, and $16.4\pm3.7(stat)^{+2.4}_{-3.0}(syst)$ fb with $c\bar{c}=\eta_c(1S)$, $\chi_{c0}$, and $\eta_c(2S)$, respectively.

PhysicsNuclear and High Energy PhysicsParticle physicsMeson010308 nuclear & particles physicsElectron–positron annihilationHigh Energy Physics::PhenomenologyHadronQuarkonium01 natural sciencesNuclear physicsParticle decayPair production0103 physical sciencesHigh Energy Physics::ExperimentProduction (computer science)Nuclear Experiment010306 general physicsEnergy (signal processing)Physical Review D
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Measurement of time-dependentCP-violating asymmetries and constraints onsin(2β+γ)with partial reconstruction ofB→D*∓π±decays

2005

We present a measurement of the time-dependent CP-violating asymmetries in decays of neutral B mesons to the final states D*-+ pi+-, using approximately 232 million BBbar events recorded by the BABAR experiment at the PEP2 e+e- storage ring. Events containing these decays are selected with a partial reconstruction technique, in which only the high-momentum pi+- from the B decay and the low-momentum pi-+ from the D*-+ decay are used. % We measure the parameters related to 2beta+gamma to be a_D*pi=-0.034 +- 0.014 +- 0.009 and c_l_D*pi = -0.019 +- 0.022 +- 0.013. With some theoretical assumptions, we interpret our results in term of the lower limits |\sin(2beta+gamma)|> 0.62 (0.35) at 68% (90%…

PhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsmedia_common.quotation_subjectElectron–positron annihilationBaBar experiment01 natural sciencesAsymmetryNuclear physicsBaryonParticle decay0103 physical sciencesPiCP violationB meson010306 general physicsmedia_commonPhysical Review D
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