6533b838fe1ef96bd12a50e9
RESEARCH PRODUCT
Experimental investigations of the hypernucleus $_Λ^4$H
Patrick AchenbachF. SchulzIvica FriščićMasashi KanetaA. Sanchez LorenteKyo TsukadaD. BosnarR. BöhmY. FujiiY. KohlAmur MargaryanS. BleserL. G. TangMichaela ThielSimon ŠIrcaM. SchothHiroki KandaM. SteinenConcettina SfientiW. KusakaM. MihovilovicJ. BeričičS. AulenbacherL. CorreaU. MüllerManami FujitaB. S. SchlimmeSho NagaoToshiyuki GogamiS. N. NakamuraM. O. DistlerS. KegelJ. PochodzallaAnselm EsserY. TakahashiHarald MerkelH. FonvieilleA. WeberA. Tyukinsubject
Lambda: hypernucleusQC1-999Nuclear TheoryAstrophysics[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencestagged beamParticle identificationpi-010305 fluids & plasmasNuclear physicsMomentumMainz LinacPionCoincidentberyllium: target0103 physical sciencesCalibration010306 general physicsNuclear ExperimentMicrotronPhysicsSpectrometerPhysicspi: decayresolutionsuppressionHypernucleusmagnetic spectrometerKmicrotronhydrogenmomentum: calibrationbackground: randomHigh Energy Physics::Experimentluminosity: highparticle identificationdescription
International audience; Negatively charged pions from two-body decays of stopped _Lambda^4H hypernuclei were studied in 2012 at the Mainz Microtron MAMI, Germany. The momenta of the decay-pions were measured with unprecedented precision by using high-resolution magnetic spectrometers. A challenge of the experiment was the tagging of kaons from associated K^+∧ production off a Be target at very forward angles. In the year 2014, this experiment was continued with a better control of the systematic uncertainties, with better suppression of coincident and random background, improved particle identification, and with higher luminosities. Another key point of the progress was the improvement in the absolute momentum calibration of the magnetic spectrometers.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-05-18 |