6533b829fe1ef96bd128ae0e
RESEARCH PRODUCT
Improved Upper Limit on the Neutrino Mass from a Direct Kinematic Method by KATRIN
Katrin CollaborationM. AkerK. AltenmüllerM. ArenzM. BabutzkaJ. BarrettS. BauerM. BeckA. BeglarianJ. BehrensT. BergmannU. BessererK. BlaumF. BlockS. BobienK. BokelohJ. BonnB. BornscheinL. BornscheinH. BouquetT. BrunstT. S. CaldwellL. La CascioS. ChilingaryanW. ChoiT. J. CoronaK. DebowskiM. DeffertM. DescherP. J. DoeO. DragounG. DrexlinJ. A. DunmoreS. DybaF. EdzardsL. EisenblätterK. EitelE. EllingerR. EngelS. EnomotoM. ErhardD. EversheimM. FedkevychA. FeldenS. FischerB. FlattJ. A. FormaggioF. M. FränkleG. B. FranklinH. FrankroneF. FriedelD. FuchsA. FulstD. FurseK. GaudaH. GemmekeW. GilF. GlückS. GörhardtS. GrohS. GrohmannR. GrössleR. GumbsheimerM. Ha MinhM. HackenjosV. HannenF. HarmsJ. HartmannN. HaußmannF. HeizmannK. HelbingS. HickfordD. HilkB. HillenD. HillesheimerD. HinzT. HöhnB. HolzapfelS. HolzmannT. HoudyM. A. HoweA. HuberT. M. JamesA. JansenA. KabothC. KarlO. KazachenkoJ. KellererN. KernertL. KippenbrockM. KleesiekM. KleinC. KöhlerL. KöllenbergerA. KopmannM. KorzeczekA. KosmiderA. KovalíkB. KraschM. KrausH. KrauseL. KuckertB. KuffnerN. KunkaT. LasserreT. L. LeO. LebedaM. LeberB. LehnertJ. LetnevF. LevenS. LichterV. M. LobashevA. LokhovM. MachatschekE. MalcherekK. MüllerM. MarkA. MarstellerE. L. MartinC. MelzerA. MenshikovS. MertensL. I. MinterS. MirzB. MonrealP. I. Morales GuzmánK. MüllerU. NaumannW. NdekeH. NeumannS. NiemesM. NoeN. S. OblathH.-w. OrtjohannA. OsipowiczB. OstrickE. OttenD. S. ParnoD. G. PhillipsP. PlischkeA. PollithyA. W. P. PoonJ. PouryamoutM. PrallF. PriesterM. RölligC. RötteleP. C.-o. RanitzschO. RestR. RinderspacherR. G. H. RobertsonC. RodenbeckP. RohrCh. RollS. RuppM. RyšavýR. SackA. SaenzP. SchäferL. SchimpfK. SchlösserM. SchlösserL. SchlüterH. SchönK. SchönungM. SchrankB. SchulzJ. SchwarzH. Seitz-moskaliukW. SellerV. SibilleD. SiegmannA. SkasyrskayaM. SlezákA. ŠPalekF. SpanierM. SteidlN. SteinbrinkM. SturmM. SuesserM. SunD. TcherniakhovskiH. H. TelleT. ThümmlerL. A. ThorneN. TitovI. TkachevN. TrostK. UrbanD. VénosK. ValeriusB. A. VandevenderR. ViandenA. P. Vizcaya HernándezB. L. WallS. WüstlingM. WeberC. WeinheimerC. WeissS. WelteJ. WendelK. J. WiermanJ. F. WilkersonJ. WolfW. XuY.-r. YenM. ZacherS. ZadorozhnyM. ZbořilG. Zellersubject
Semileptonic decayPhysics - Instrumentation and DetectorsCosmology and Nongalactic Astrophysics (astro-ph.CO)Physics::Instrumentation and DetectorsFOS: Physical sciencesGeneral Physics and AstronomyKinematicsElectron[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]KATRIN01 natural sciences7. Clean energyHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)mass: scaleneutrino: mass: measured0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]ddc:530S066MAESensitivity (control systems)Limit (mathematics)structure[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]Nuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentPhysicstritiumPhysicsformationS066M2EInstrumentation and Detectors (physics.ins-det)semileptonic decaysensitivityddc:kinematicsElementary Particles and Fieldselectron: energy spectrumHigh Energy Physics::ExperimentPräzisionsexperimente - Abteilung BlaumNeutrino[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Energy (signal processing)Astrophysics - Cosmology and Nongalactic AstrophysicsKATRINexperimental resultsdescription
We report on the neutrino mass measurement result from the first four-week science run of the Karlsruhe Tritium Neutrino experiment KATRIN in spring 2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are energy analyzed by a high-resolution MAC-E filter. A fit of the integrated electron spectrum over a narrow interval around the kinematic end point at 18.57 keV gives an effective neutrino mass square value of (−1.0−1.1+0.9) eV2. From this, we derive an upper limit of 1.1 eV (90% confidence level) on the absolute mass scale of neutrinos. This value coincides with the KATRIN sensitivity. It improves upon previous mass limits from kinematic measurements by almost a factor of 2 and provides model-independent input to cosmological studies of structure formation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-11-25 |