Precision measurement of the mass of the hc(1P1) state of charmonium.
作者信息
Dobbs S, Metreveli Z, Seth K K, Tomaradze A, Libby J, Powell A, Wilkinson G, Ecklund K M, Love W, Savinov V, Lopez A, Mendez H, Ramirez J, Ge J Y, Miller D H, Shipsey I P J, Xin B, Adams G S, Anderson M, Cummings J P, Danko I, Hu D, Moziak B, Napolitano J, He Q, Insler J, Muramatsu H, Park C S, Thorndike E H, Yang F, Artuso M, Blusk S, Khalil S, Li J, Mountain R, Nisar S, Randrianarivony K, Sultana N, Skwarnicki T, Stone S, Wang J C, Zhang L M, Bonvicini G, Cinabro D, Dubrovin M, Lincoln A, Naik P, Rademacker J, Asner D M, Edwards K W, Reed J, Briere R A, Ferguson T, Tatishvili G, Vogel H, Watkins M E, Rosner J L, Alexander J P, Cassel D G, Duboscq J E, Ehrlich R, Fields L, Galik R S, Gibbons L, Gray R, Gray S W, Hartill D L, Heltsley B K, Hertz D, Hunt J M, Kandaswamy J, Kreinick D L, Kuznetsov V E, Ledoux J, Mahlke-Krüger H, Mohapatra D, Onyisi P U E, Patterson J R, Peterson D, Riley D, Ryd A, Sadoff A J, Shi X, Stroiney S, Sun W M, Wilksen T, Athar S B, Patel R, Yelton J, Rubin P, Eisenstein B I, Karliner I, Mehrabyan S, Lowrey N, Selen M, White E J, Wiss J, Mitchell R E, Shepherd M R, Besson D, Pedlar T K, Cronin-Hennessy D, Gao K Y, Hietala J, Kubota Y, Klein T, Lang B W, Poling R, Scott A W, Zweber P
机构信息
Northwestern University, Evanston, Illinois 60208, USA.
出版信息
Phys Rev Lett. 2008 Oct 31;101(18):182003. doi: 10.1103/PhysRevLett.101.182003.
A precision measurement of the mass of the h_{c}(1P1) state of charmonium has been made using a sample of 24.5x10;{6} psi(2S) events produced in e;{+}e;{-} annihilation at the Cornell Electron Storage Ring (CESR). The reaction used was psi(2S)-->pi;{0}h_{c}, pi;{0}-->gammagamma, h_{c}-->gammaeta_{c}, and the reaction products were detected in the CLEO-c detector. Data have been analyzed both for the inclusive reaction and for the exclusive reactions in which eta_{c} decays are reconstructed in 15 hadronic decay channels. Consistent results are obtained in the two analyses. The averaged results of the present measurements are M(h_{c})=3525.28+/-0.19(stat.)+/-0.12(syst.) MeV, and B(psi(2S)-->pi;{0}h_{c})xB(h_{c}-->gammaeta_{c})=(4.19+/-0.32+/-0.45)x10;{-4}. Using the ;{3}P_{J} centroid mass, DeltaM_{hf}(1P) identical withM(chi_{cJ})-M(h_{c})=+0.02+/-0.19+/-0.13 MeV.
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