A precision determination of the mass of the $η$ meson

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dc.creatorThe GEM collaboration
dc.creatorAbdel-Bary, M.
dc.creatorBudzanowski, A.
dc.creatorChatterjee, A.
dc.creatorErnst, J.
dc.creatorHawranek, P.
dc.creatorJahn, R.
dc.creatorJha, V.
dc.creatorKilian, K.
dc.creatorKliczewski, S.
dc.creatorKirillov, D.
dc.creatorKolev, D.
dc.creatorKravcikova, M.
dc.creatorKutsarova, T.
dc.creatorLesiak, M.
dc.creatorLieb, J.
dc.creatorMachner, H.
dc.creatorMagiera, A.
dc.creatorMaier, R.
dc.creatorMartinska, G.
dc.creatorNedev, S.
dc.creatorPiskunov, N.
dc.creatorPrasuhn, D.
dc.creatorProtić, D.
dc.creatorvon Rossen, P.
dc.creatorRoy, B. J.
dc.creatorSitnik, I.
dc.creatorSiudak, R.
dc.creatorSmiechowicz, M.
dc.creatorStein, H. J.
dc.creatorTsenov, R.
dc.creatorUlicny, M.
dc.creatorUrban, J.
dc.creatorVankova, G.
dc.creatorVankova, G.
dc.date2005-05-04
dc.date2005-06-07
dc.date.accessioned2026-07-07T11:58:05Z
dc.date.available2026-07-07T11:58:05Z
dc.descriptionSeveral processes of meson production in proton-deuteron collisions have been measured simultaneously using a calibrated magnetic spectrograph. Among these processes, the $η$ meson is seen clearly as a sharp missing--mass peak on a slowly varying background in the $p+d\to ^3\textrm{He} +X$ reaction. Knowing the kinematics of the other reactions with well determined masses, it is possible to deduce a precise mass for the $η$ meson. The final result, $m(η)=547.311\pm 0.028 \textrm{(stat)} \pm 0.032 \textrm{(syst) MeV/c}^2$, is significantly lower than that found by the recent NA48 measurement, though it is consistent with values obtained in earlier counter experiments.
dc.description10 pages, 6 figures, Fig. 3 changed
dc.identifierhttps://arxiv.org/abs/hep-ex/0505006
dc.identifierhttp://arxiv.org/abs/hep-ex/0505006
dc.identifierPhys.Lett.B619:281-287,2005
dc.identifierdoi:10.1016/j.physletb.2005.06.004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206108
dc.subjectHigh Energy Physics - Experiment
dc.subjectNuclear Experiment
dc.titleA precision determination of the mass of the $η$ meson
dc.typetext

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