0000000000516745

AUTHOR

C. Niess

showing 2 related works from this author

Measurement of the mass and lifetime of the Ω(−)(b) baryon

2016

A proton-proton collision data sample, corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by LHCb at $\sqrt{s}=7$ and 8 TeV, is used to reconstruct $63\pm9$ $\Omega_b^-\to\Omega_c^0\pi^-$, $\Omega_c^0\to pK^-K^-\pi^+$ decays. Using the $\Xi_b^-\to\Xi_c^0\pi^-$, $\Xi_c^0\to pK^-K^-\pi^+$ decay mode for calibration, the lifetime ratio and absolute lifetime of the $\Omega_b^-$ baryon are measured to be \begin{align*} \frac{\tau_{\Omega_b^-}}{\tau_{\Xi_b^-}} &= 1.11\pm0.16\pm0.03, \\ \tau_{\Omega_b^-} &= 1.78\pm0.26\pm0.05\pm0.06~{\rm ps}, \end{align*} where the uncertainties are statistical, systematic and from the calibration mode (for $\tau_{\Omega_b^-}$ only). A measurement …

Physics and Astronomy (miscellaneous)Analytical chemistryQuarkonium01 natural sciencesOmegaproton-proton scatteringHigh Energy Physics - ExperimentLuminosityPhysics Particles & FieldsHEAVY-QUARK EXPANSIONHadron-Hadron scattering (experiments)[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]BaryonsBarionsPhysicsPhysicsBEAUTYMassa (Física)Nuclear & Particles PhysicsPhysical SciencesINCLUSIVE WEAK DECAYSLHCMass (Physics)Propietats de la matèriaParticle Physics - ExperimentProperties of matterNuclear and High Energy PhysicsHadronsAstronomy & AstrophysicsParticle and resonance productionNONuclear physicsRATIO0202 Atomic Molecular Nuclear Particle And Plasma Physics0103 physical sciencesPi010306 general physics0206 Quantum PhysicsINCLUSIVE WEAK DECAYS; HEAVY-QUARK EXPANSION; DISCARDING 1/N(C); RATIO; BEAUTY; RULEScience & Technology010308 nuclear & particles physicsQCDHEPDISCARDING 1/N(C)BaryonLHCb0201 Astronomical And Space SciencesHadron-Hadron scattering (experiments) Particle and resonance production proton-proton scattering QCD QuarkoniumHadronic decays of baryonBottom baryons (|B|>0)High Energy Physics::ExperimentCharmed mesons (|C|>0 B=0)RULE
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Strontium90 for determination of time since death

1999

Strontium90 (Sr90) is an artificial nuclear fission product of the atmospheric a-bomb testing between 1945 and 1979. It was spread throughout the atmosphere in the following years. Sr90 is an analogue to calcium and therefore enriched in human bones. Several studies especially in the 1960s and 1970s were undertaken to investigate the Sr90 burden and the resulting incorporated radiation in humans, but present studies are missing. In this study nine bone samples, three from 1931/32 and six from 1989 to 1994 were examined by measuring the Sr90 radiation. The samples from 1931/32 did not show any Sr90 activity. All the samples from 1989 and later showed a Sr90 activity, but the intensity was ve…

AdultTime since deathAdolescentSpecific timePhysiologyHuman boneBiologyBone and BonesTimePathology and Forensic MedicineRadioactive contaminationGeneticsHumansChildbusiness.industryPublic Health Environmental and Occupational HealthForensic MedicineMiddle AgedDeathPsychiatry and Mental healthAge estimationStrontium RadioisotopesNuclear medicinebusinessLawStrontium-90Forensic Science International
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