A precision determination of the mass of the $\eta$ meson

Abstract

Several processes of meson production in proton-deuteron collisions have been measured simultaneously using a calibrated magnetic spectrograph. Among these processes, the $\eta$ meson is seen clearly as a sharp missing--mass peak on a slowly varying background in the $p+d{\to }^3\text{He}+X$ reaction. Knowing the kinematics of the other reactions with well determined masses, it is possible to deduce a precise mass for the $\eta$ meson. The final result, $m(\eta )=547.311\pm 0.028\text{(stat)}\pm 0.032{\text{(syst) MeV/c}}^2$, is significantly lower than that found by the recent NA48 measurement, though it is consistent with values obtained in earlier counter experiments.

arXiv comment10 pages, 6 figures, Fig. 3 changed

References in corpus (2)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• New measurements of the $\eta$ and $K^0$ masses

Cited by in corpus (10)

• Near threshold eta meson production in the d+d->alpha+eta reaction
• Low-energy etaN interactions: scattering lengths and resonance parameters
• The Physics of DAFNE and KLOE
• $\eta$-meson in nuclear matter
• Measurement of the eta-Meson Mass using psi(2S) --> eta J/psi
• New determination of the mass of the eta meson at COSY-ANKE
• eta and eta' Physics at MAMI
• Eta and eta' mesons production at COSY-11
• Precise measurements of the eta and the neutral kaon meson masses with the KLOE detector
• Measurement of the eta mass at KLOE