Observation of Single Top-quark Production with the CDF II Experiment
Author | : |
Publisher | : |
Total Pages | : 6 |
Release | : 2010 |
ISBN-10 | : OCLC:727182377 |
ISBN-13 | : |
Rating | : 4/5 (77 Downloads) |
Download or read book Observation of Single Top-quark Production with the CDF II Experiment written by and published by . This book was released on 2010 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the observation of electroweak single top-quark production using up to 3.2 fb−1 of data collected by the CDF experiment. Lepton plus jets candidate events are classified by four parallel analysis techniques: one likelihood discriminant, one matrix-element discriminant, one decision-tree discriminant, and one neural-network discriminant. These outputs are combined with a super discriminant based on a neural-network analysis in order to improve the expected sensitivity. In conjunction with one neural-network discriminant using a complementary dataset of MET plus jets events with a veto on identified leptons we observe a signal consistent with the standard model but inconsistent with the background-only model by 5.0 standard deviations, with a median expected sensitivity in excess of 5.9 standard deviations.