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NSR database version of April 27, 2024.

Search: Author = A.Krako

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2022KR05      Phys.Rev. C 106, L061601 (2022)

A.J.Krasznahorkay, A.Krasznahorkay, M.Begala, M.Csatlos, L.Csige, J.Gulyas, A.Krako, J.Timar, I.Rajta, I.Vajda, N.J.Sas

New anomaly observed in ¹²C supports the existence and the vector character of the hypothetical X17 boson

NUCLEAR REACTIONS ¹¹B(p, e⁺e^-), E=1.5-2.5 MeV; measured electron and positrons, energy-sum spectra and angular correlation; deduced anomalous excess of e⁺e_- pairs around 155-160null from the decay of 17.2 MeV J=1_- state in ¹²C via E1 transition. Extracted X17 boson branching ratio, mass of X17 particle; likely the same as X17 particle suggested by 2016Kr01 (Phys. Rev. Lett. 116, 042501). Scintillation detectors and double-sided silicon strip detectors (DSSD) at 2 MV Tandetron accelerator of ATOMKI (Debrecen, Hungary).

doi: 10.1103/PhysRevC.106.L061601
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