D⁺和D⁰全含半轻子衰变的绝对分支比测量。
Absolute branching fraction measurements for D+ and D0 inclusive semileptonic decays.
作者信息
Adam N E, Alexander J P, Berkelman K, Cassel D G, Duboscq J E, Ecklund K M, Ehrlich R, Fields L, Gibbons L, Gray R, Gray S W, Hartill D L, Heltsley B K, Hertz D, 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, Pivarski J, Riley D, Ryd A, Sadoff A J, Schwarthoff H, Shi X, Stroiney S, Sun W M, Wilksen T, Weinberger M, Athar S B, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein B I, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, White E J, Wiss J, Shepherd M R, Besson D, Pedlar T K, Cronin-Hennessy D, Gao K Y, Gong D T, Hietala J, Kubota Y, Klein T, Lang B W, Poling R, Scott A W, Smith A, Dobbs S, Metreveli Z, Seth K K, Tomaradze A, Zweber P, Ernst J, Severini H, Dytman S A, Love W, Savinov V, Aquines O, Li Z, Lopez A, Mehrabyan S, Mendez H, Ramirez J, Huang G S, Miller D H, Pavlunin V, Sanghi B, Shipsey I P J, Xin B, Adams G S, Anderson M, Cummings J P, Danko I, Napolitano J, He Q, Insler J, Muramatsu H, Park C S, Thorndike E H, Coan T E, Gao Y S, Liu F, Artuso M, Blusk S, Butt J, Li J, Menaa N, Mountain R, Nisar S, Randrianarivony K, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang J C, Zhang K, Csorna S E, Bonvicini G, Cinabro D, Dubrovin M, Lincoln A, Asner D M, Edwards K W, Briere R A, Brock I, Chen J, Ferguson T, Tatishvili G, Vogel H, Watkins M E, Rosner J L
机构信息
Cornell University, Ithaca, New York 14853, USA.
出版信息
Phys Rev Lett. 2006 Dec 22;97(25):251801. doi: 10.1103/PhysRevLett.97.251801. Epub 2006 Dec 21.
We present measurements of the inclusive branching fractions for the decays D+-->Xe+ nu(e) and D0-->Xe+ nu(e), using 281 pb(-1) of data collected on the psi(3770) resonance with the CLEO-c detector. We find B(D0-->Xe+ nu(e)) = (6.46+/-0.17+/-0.13)% and B(D+-->Xe+ nu(e)) = (16.13+/-0.20+/-0.33)%. Using the known D meson lifetimes, we obtain the ratio Gamma(D+)sl/Gamma(D0)sl = 0.985+/-0.028+/-0.015, confirming isospin invariance at the level of 3%. The positron momentum spectra from D+ and D0 have consistent shapes.
我们展示了使用CLEO - c探测器在ψ(3770)共振处收集的281 pb⁻¹数据，对衰变D⁺→Xe⁺ νₑ和D⁰→Xe⁺ νₑ的全包容分支比的测量结果。我们发现B(D⁰→Xe⁺ νₑ) = (6.46±0.17±0.13)%，B(D⁺→Xe⁺ νₑ) = (16.13±0.20±0.33)%。利用已知的D介子寿命，我们得到比率Γ(D⁺)sl/Γ(D⁰)sl = 0.985±0.028±0.015，在3%的水平上证实了同位旋不变性。来自D⁺和D⁰的正电子动量谱具有一致的形状。
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