Precision measurements of the total and partial widths of the psi(2S) charmonium meson with a new complementary-scan technique in antiproton-proton annihilations

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dc.creatorFermilab E835 Collaboration
dc.creatorAndreotti, M.
dc.creatorBagnasco, S.
dc.creatorBaldini, W.
dc.creatorBettoni, D.
dc.creatorBorreani, G.
dc.creatorBuzzo, A.
dc.creatorCalabrese, R.
dc.creatorCester, R.
dc.creatorCibinetto, G.
dc.creatorDalpiaz, P.
dc.creatorGarzoglio, G.
dc.creatorGollwitzer, K. E.
dc.creatorGraham, M.
dc.creatorHu, M.
dc.creatorJoffe, D.
dc.creatorKasper, J.
dc.creatorLasio, G.
dc.creatorVetere, M. Lo
dc.creatorLuppi, E.
dc.creatorMacrì, M.
dc.creatorMandelkern, M.
dc.creatorMarchetto, F.
dc.creatorMarinelli, M.
dc.creatorMenichetti, E.
dc.creatorMetreveli, Z.
dc.creatorMussa, R.
dc.creatorNegrini, M.
dc.creatorObertino, M. M.
dc.creatorPallavicini, M.
dc.creatorPastrone, N.
dc.creatorPatrignani, C.
dc.creatorPordes, S.
dc.creatorRobutti, E.
dc.creatorRoethel, W.
dc.creatorRosen, J.
dc.creatorRumerio, P.
dc.creatorRusack, R. W.
dc.creatorSantroni, A.
dc.creatorSchultz, J.
dc.creatorSeo, S. H.
dc.creatorSeth, K. K.
dc.creatorStancari, G.
dc.creatorStancari, M.
dc.creatorTomaradze, A.
dc.creatorUman, I.
dc.creatorVidnovic, T.
dc.creatorWerkema, S.
dc.creatorZweber, P.
dc.date2007-03-06
dc.date2007-09-27
dc.date.accessioned2026-07-07T11:22:02Z
dc.date.available2026-07-07T11:22:02Z
dc.descriptionWe present new precision measurements of the psi(2S) total and partial widths from excitation curves obtained in antiproton-proton annihilations by Fermilab experiment E835 at the Antiproton Accumulator in the year 2000. A new technique of complementary scans was developed to study narrow resonances with stochastically cooled antiproton beams. The technique relies on precise revolution-frequency and orbit-length measurements, while making the analysis of the excitation curve almost independent of machine lattice parameters. We study the psi(2S) meson through the processes pbar p -> e+ e- and pbar p -> J/psi + X -> e+ e- + X. We measure the width to be Gamma = 290 +- 25(sta) +- 4(sys) keV and the combination of partial widths Gamma_e+e- * Gamma_pbarp / Gamma = 579 +- 38(sta) +- 36(sys) meV, which represent the most precise measurements to date.
dc.description17 pages, 3 figures, 3 tables. Final manuscript accepted for publication in Phys. Lett. B. Parts of the text slightly expanded or rearranged; results are unchanged
dc.identifierhttps://arxiv.org/abs/hep-ex/0703012
dc.identifierhttp://arxiv.org/abs/hep-ex/0703012
dc.identifierPhys.Lett.B654:74-79,2007
dc.identifierdoi:10.1016/j.physletb.2007.08.044
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194438
dc.subjectHigh Energy Physics - Experiment
dc.titlePrecision measurements of the total and partial widths of the psi(2S) charmonium meson with a new complementary-scan technique in antiproton-proton annihilations
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