Dataset referencing 2022KR05
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