Measurement of absolute hadronic branching fractions of D mesons and e+e- -->DD cross sections at Ec.m.=3773 MeV.

He Q,Muramatsu H,Park C S, Park W,Thorndike E H,Coan T E,Gao Y S,Liu F,Artuso M, Boulahouache C,Blusk S, Butt J, Dambasuren E,Dorjkhaidav O,Li J,Menaa N,Mountain R,Nandakumar R,Randrianarivony K, Redjimi R,Sia R,Skwarnicki T,Stone S,Wang J C,Zhang K,Csorna S E,Bonvicini G,Cinabro D,Dubrovin M,Briere R A,Chen G P,Chen J,Ferguson T,Tatishvili G,Vogel H,Watkins M E,Rosner J L,Adam N E,Alexander J P,Berkelman K,Cassel D G,Crede V,Duboscq J E,Ecklund K M,Ehrlich R,Fields L, Gibbons L, Gittelman B,Gray R,Gray S W,Hartill D L,Heltsley B K,Hertz D,Hsu L,Jones C D,Kandaswamy J,Kreinick D L,Kuznetsov V E,Mahlke-Krüger H,Meyer T O,Onyisi P U E,Patterson J R,Peterson D, Phillips E A,Pivarski J,Riley D,Ryd A, Sadoff A J,Schwarthoff H,Shi X,Shepherd M R,Stroiney S,Sun W M, Urner D, Weaver K M,Wilksen T,Weinberger M,Athar S B,Avery P,Breva-Newell L, Patel R,Potlia V,Stoeck H,Yelton J,Rubin P,Cawlfield C,Eisenstein B I, Gollin G D,Karliner I,Kim D,Lowrey N,Naik P,Sedlack C,Selen M,Williams J,Wiss J, Edwards K W,Besson D,Pedlar T K,Cronin-Hennessy D,Gao K Y,Gong D T,Hietala J,Kubota Y,Klein T,Lang B W,Li S Z,Poling R,Scott A W,Smith A,Dobbs S,Metreveli Z,Seth K K,Tomaradze A,Zweber P,Ernst J, Mahmood A H, Severini H,Asner D M,Dytman S A, Love W, Mehrabyan S, Mueller J A, Savinov V,Li Z, Lopez A,Mendez H,Ramirez J,Huang G S,Miller D H, Pavlunin V,Sanghi B,Shipsey I P J,Adams G S, Chasse M, Cravey M,Cummings J P,Danko I, Napolitano J, Null Null

Physical review letters（2005）

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摘要

Using 55.8 pb(-1) of e+e- collisions recorded at the psi(3770) resonance with the CLEO-c detector at CESR, we determine absolute hadronic branching fractions of charged and neutral D mesons using a double tag technique. Among measurements for three D0 and six D+ modes, we obtain reference branching fractions B(D0-->K-pi+)=(3.91+/-0.08+/-0.09)% and B(D+-->K-pi+pi+)=(9.5+/-0.2+/-0.3)%, where the uncertainties are statistical and systematic, respectively. Final state radiation is included in these branching fractions by allowing for additional, unobserved, photons in the final state. Using a determination of the integrated luminosity, we also extract the cross sections sigma(e+e- -->D0D0)=(3.60+/-0.07(+0.07)(-0.05)) nb and sigma(e+e- -->D+D-)=(2.79+/-0.07(+0.10)(-0.04)) nb.

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