Chrome Extension
WeChat Mini Program
Use on ChatGLM

Search for B-→ Λ P Ν Ν with the B a B Ar Experiment SEARCH for B-→ Λ P Ν Ν ... LEES J. P. Et Al.

J. P. Lees, V. Poireau R. Prepost,Sau Lan Wu

Archivio Istituzionale della Ricerca (Universita Degli Studi Di Milano)(2019)

Cited 1|Views7
Abstract
A search for the rare flavor-changing neutral current process B-→Λp¯νν¯ using data from the BABAR experiment has been performed. A total of 424 fb-1 of e+e- collision data collected at the center-of-mass energy of the ϒ(4S) resonance is used in this study, corresponding to a sample of (471±3)×106 BB¯ pairs. Signal B-→Λp¯νν¯ candidates are identified by first fully reconstructing a B+ decay in one of many possible exclusive decays to hadronic final states, then examining detector activity that is not associated with this reconstructed B+ decay for evidence of a signal B-→Λp¯νν¯ decay. The data yield is found to be consistent with the expected background contribution under a null signal hypothesis, resulting in an upper limit of B(B-→Λp¯νν¯)<3.0×10-5 at the 90% confidence level.
More
Translated text
PDF
Bibtex
AI Read Science
Must-Reading Tree
Example
Generate MRT to find the research sequence of this paper
Data Disclaimer
The page data are from open Internet sources, cooperative publishers and automatic analysis results through AI technology. We do not make any commitments and guarantees for the validity, accuracy, correctness, reliability, completeness and timeliness of the page data. If you have any questions, please contact us by email: report@aminer.cn
Chat Paper

要点】:利用 BABAR 实验数据,研究了 B-→Λp¯νν¯ 稀有 flavor-changing neutral current 过程,未发现显著信号,得到了该过程的 upper limit。

方法】:通过完全重建一个 B+ 的多种可能的 hadronic final states 的衰变,然后检查与该重建 B+ 衰变无关的探测器活动,寻找 B-→Λp¯νν¯ 信号。

实验】:使用 ϒ(4S) 质心能量下收集的 424 fb-1 e+e- 碰撞数据和 (471±3)×106 BB¯ 对样本,得到的结果与 null signal 假设下的背景贡献一致,得出的上限为 B(B-→Λp¯νν¯)<3.0×10-5,置信水平为 90%。