Searching for the e+e- decay of a new particle (X17) created in nuclear transitions of 4He

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dc.contributor.advisorKrasznahorkay, Attila
dc.contributor.authorFirak, Daniel Scheres
dc.contributor.departmentDE--Természettudományi és Technológiai Kar--Fizikai Intézethu_HU
dc.date.accessioned2020-05-14T10:32:38Z
dc.date.available2020-05-14T10:32:38Z
dc.date.created2020-03-13
dc.description.abstractThis work concerns an experiment in which an excited state of 4He was produced in an attempt to observer the production of a possible new particle through its de-excitation. The new particle, first described in a 2016 paper and labeled X17, should have mass near 17 MeV/c2, and could be either an J^P = 1^+ or J^P = 0^- particle. To observe such particle, an electron spectrometer was constructed to observe the angular separation of electron + positron pairs depopulating the 20.01 MeV 0- state of 4He. A peak-like enhancement near 115 degrees was observed in this spectrum, which is compatible with the X17 particle. In this thesis, the nuclear processes involved in the experiment are explained, as well as the results from the initial experiment, as well as the titular 4He experiment, with attention also to the data analysis.hu_HU
dc.description.coursePhysicshu_HU
dc.description.degreeBSc/BAhu_HU
dc.format.extent35hu_HU
dc.identifier.urihttp://hdl.handle.net/2437/287237
dc.language.isoenhu_HU
dc.subjectX17hu_HU
dc.subjectnuclear transitionhu_HU
dc.subjectparticlehu_HU
dc.subjectbosonhu_HU
dc.subject.dspaceDEENK Témalista::Fizikahu_HU
dc.titleSearching for the e+e- decay of a new particle (X17) created in nuclear transitions of 4Hehu_HU
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