Observation of Single Top Quark Production with the D0 Detector
We report on the observation of single top quark production by the D0 collaboration using a dataset of 2.3 fb{sup -1} collected at the Fermilab Tevatron p{bar p} collider. Several multivariate techniques are combined to separate the single top signal from backgrounds. The measured single top cross section is {sigma}{sub tb+tqb} = 3.94 {+-} 0.88 pb. The probability to measure a cross section at this value or higher in the absence of signal is 2.9 x 10{sup -7}, corresponding to a 5.0 standard deviation significance for the presence of signal. The lower limit at the 95% C.L. on the CKM matrix element V{sub tb} is |V{sub tb}| > 0.78. A separate measurement of the t-channel cross section gives {sigma}{sub tqb} = 3.14{sub -0.80}{sup +0.94} pb.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 967411
- Report Number(s):
- FERMILAB-PUB-09-371-PPD; arXiv eprint number arXiv:0908.4553; TRN: US0904464
- Resource Relation:
- Conference: To appear in the proceedings of 2009 Europhysics Conference on High Energy Physics: HEP 2009 (EPS-HEP 2009), Cracow, Poland, 16-22 Jul 2009
- Country of Publication:
- United States
- Language:
- English
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