Inclusive Lambda(+)(c) production in e(+)e(-) annihilations at root s=10.54 GeV and in Y(4S) decays
文献类型：期刊论文
| 作者 | BaBar Collaboration |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2007 |
| 卷号 | 75期号:1 |
| 关键词 | HEAVY-QUARK FRAGMENTATION HADRONIC Z-DECAYS EXCITED B-MESONS ASTERISK PRODUCTION Z(0) DECAYS QCD LEP SPECTRA PHYSICS GLUONS |
| 通讯作者 | Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France. |
| 英文摘要 | We present measurements of the total production rates and momentum distributions of the charmed baryon Lambda(+)(c) in e(+)e(-)-> hadrons at a center-of-mass energy of 10.54 GeV and in Upsilon(4S) decays. In hadronic events at 10.54 GeV, charmed hadrons are almost exclusively leading particles in e(+)e(-)-> cc events, allowing direct studies of c-quark fragmentation. We measure a momentum distribution for Lambda(+)(c) baryons that differs significantly from those measured previously for charmed mesons. Comparing with a number of models, we find none that can describe the distribution completely. We measure an average scaled momentum of < x(p)>=0.574 +/- 0.009 and a total rate of N-Lambda c(qq)=0.057 +/- 0.002(exp.)+/- 0.015(BF) Lambda(+)(c) per hadronic event, where the experimental error is much smaller than that due to the branching fraction into the reconstructed decay mode, pK(-)pi(+). In Upsilon(4S) decays we measure a total rate of N-Lambda c(Upsilon)=0.091 +/- 0.006(exp.)+/- 0.024(BF) per Upsilon(4S) decay, and find a much softer momentum distribution than expected from B decays into a Lambda(+)(c) plus an antinucleon and one to three pions. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000243896200010 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212779]  |
| 专题 | 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | BaBar Collaboration. Inclusive Lambda(+)(c) production in e(+)e(-) annihilations at root s=10.54 GeV and in Y(4S) decays[J]. PHYSICAL REVIEW D,2007,75(1). |
| APA | BaBar Collaboration.(2007).Inclusive Lambda(+)(c) production in e(+)e(-) annihilations at root s=10.54 GeV and in Y(4S) decays.PHYSICAL REVIEW D,75(1). |
| MLA | BaBar Collaboration."Inclusive Lambda(+)(c) production in e(+)e(-) annihilations at root s=10.54 GeV and in Y(4S) decays".PHYSICAL REVIEW D 75.1(2007). |
入库方式： OAI收割
来源：高能物理研究所
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