Matches in SemOpenAlex for { <https://semopenalex.org/work/W2078550982> ?p ?o ?g. }
- W2078550982 abstract "A new precise determination of the $ eta$ meson mass is presented. It is based on a measurement of the threshold for the $ gamma prightarrow peta$ reaction using the tagger focal-plane microscope detector at the MAMI-B facility in Mainz. The tagger microscope has a higher energy resolution than the standard tagging spectrometer and, hence, allowed an improvement in the accuracy compared to the previous $ eta$ mass measurement at MAMI-B. Special emphasis was put on a very careful energy calibration of the electron beam and the tagging device, which reduced considerably the systematic uncertainty compared to the previous MAMI experiment. The result $ m_{eta}=(547.865 pm 0.031_{stat.}pm 0.062_{syst.})$ MeV agrees very well with the precise values of the NA48, KLOE, CLEO and COSY-ANKE Collaborations and deviates by $ 6sigma$ from the smaller value obtained by the GEM Collaboration at COSY." @default.
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- W2078550982 date "2014-03-01" @default.
- W2078550982 modified "2023-10-04" @default.
- W2078550982 title "Determination of the $ eta$ mass with the Crystal Ball at MAMI-B" @default.
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- W2078550982 doi "https://doi.org/10.1140/epja/i2014-14058-1" @default.
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