对包容性B→ψ产生的测量。
Measurements of inclusive B-->psi production.
作者信息
Anderson S, Frolov V V, Kubota Y, Lee S J, Li S Z, Poling R, Smith A, Stepaniak C J, Urheim J, Metreveli Z, Seth K K, Tomaradze A, Zweber P, Ahmed S, Alam M S, Jian L, Saleem M, Wappler F, Eckhart E, Gan K K, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar T K, Thayer J B, von Toerne E, Wilksen T, Zoeller M M, Muramatsu H, Richichi S J, Severini H, Skubic P, Dytman S A, Mueller J A, Nam S, Savinov V, Chen S, Hinson J W, Lee J, Miller D H, Pavlunin V, Shibata E I, Shipsey I P J, Cronin-Hennessy D, Lyon A L, Park C S, Park W, Thorndike E H, Coan T E, Gao Y S, Liu F, Maravin Y, Narsky I, Stroynowski R, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Khroustalev K, Moneti G C, Mountain R, Nandakumar R, Skwarnicki T, Stone S, Wang J C, Mahmood A H, Csorna S E, Danko I, Xu Z, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas S P, Shapiro A, Sun W M, Weinstein A J, Masek G, Paar H P, Mahapatra R, Nelson H N, Briere R A, Chen G P, Ferguson T, Tatishvili G, Vogel H, Adam N E, Alexander J P, Berkelman K, Blanc F, Boisvert V, Cassel D G, Drell P S, Duboscq J E, Ecklund K M, Ehrlich R, Gibbons L, Gittelman B, Gray S W, Hartill D L, Heltsley B K, Hsu L, Jones C D, Kandaswamy J, Kreinick D L, Magerkurth A, Mahlke-Krüger H, Meyer T O, Mistry N B, Nordberg E, Patterson J R, Peterson D, Pivarski J, Riley D, Sadoff A J, Schwarthoff H, Shepherd M R, Thayer J G, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar S B, Avery P, Breva-Newell L, Potlia V, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim D Y-J, Wilson R, Benslama K, Eisenstein B I, Ernst J, Gollin G D, Hans R M, Karliner I, Lowrey N, Marsh M A, Plager C, Sedlack C, Selen M, Thaler J J, Williams J, Edwards K W, Ammar R, Besson D, Zhao X
机构信息
University of Minnesota, Minneapolis, Minnesota 55455, USA.
出版信息
Phys Rev Lett. 2002 Dec 31;89(28 Pt 1):282001. doi: 10.1103/PhysRevLett.89.282001. Epub 2002 Dec 26.
Using the combined CLEO II and CLEO II.V data sets of 9.1 fb(-1) at the Upsilon(4S), we measure properties of psi mesons produced directly from decays of the B meson, where "B" denotes an admixture of B+, B-, B0, and B;(0), and "psi" denotes either J/psi(1S) or psi(2S). We report first measurements of psi polarization in B-->psi(direct)X: alpha(psi(1S))=-0.30(+0.07)(-0.06)+/-0.04 and alpha(psi(2S))=-0.45(+0.22)(-0.19)+/-0.04. We also report improved measurements of the momentum distributions of psi produced directly from B decays, correcting for measurement smearing. Finally, we report measurements of the inclusive branching fraction for B-->psiX and B-->chi(c1)X.
利用在 $\Upsilon(4S)$ 处 $9.1\ \rm fb^{-1}$ 的 CLEO II 和 CLEO II.V 组合数据集，我们测量了直接由 $B$ 介子衰变产生的 $\psi$ 介子的性质，其中 “$B$” 表示 $B^+$、$B^-$、$B^0$ 和 $B^0_s$ 的混合态，“$\psi$” 表示 $J/\psi(1S)$ 或 $\psi(2S)$。我们首次报告了 $B\to\psi(\rm direct)X$ 中 $\psi$ 极化的测量结果：$\alpha_{J/\psi(1S)} = -0.30(+0.07)(-0.06)\pm0.04$ 和 $\alpha_{\psi(2S)} = -0.45(+0.22)(-0.19)\pm0.04$。我们还报告了对直接由 $B$ 衰变产生的 $\psi$ 的动量分布的改进测量结果，对测量中的展宽进行了校正。最后，我们报告了 $B\to\psi X$ 和 $B\to\chi_{c1}X$ 的包容性分支比的测量结果。
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