Abstract
The D0 Collaboration reports direct evidence for electroweak production of single top quarks through the t-channel exchange of a virtual W boson. This is the first analysis to isolate an individual single top quark production channel. We select events containing an isolated electron or muon, missing transverse energy, and two, three or four jets from 2.3 fb-1 of p over(p, ̄) collisions at the Fermilab Tevatron Collider. One or two of the jets are identified as containing a b hadron. We combine three multivariate techniques optimized for the t-channel process to measure the t- and s-channel cross sections simultaneously. We measure cross sections of 3.14- 0.80 + 0.94 pb for the t-channel and 1.05 ± 0.81 pb for the s-channel. The measured t-channel result is found to have a significance of 4.8 standard deviations and is consistent with the standard model prediction.
| Original language | English |
|---|---|
| Pages (from-to) | 363-369 |
| Number of pages | 7 |
| Journal | Physics Letters B |
| Volume | 682 |
| Issue number | 4-5 |
| DOIs | |
| State | Published - Jan 4 2010 |
| Externally published | Yes |
Funding
We thank the staffs at Fermilab and collaborating institutions, and acknowledge support from the DOE and NSF (USA); CEA and CNRS/IN2P3 (France); FASI , Rosatom and RFBR (Russia); CNPq , FAPERJ , FAPESP and FUNDUNESP (Brazil); DAE and DST (India); Colciencias (Colombia); CONACyT (Mexico); KRF and KOSEF (Korea); CONICET and UBACyT (Argentina); FOM (The Netherlands); STFC and the Royal Society (United Kingdom); MSMT and GACR (Czech Republic); CRC Program , CFI , NSERC and WestGrid Project (Canada); BMBF and DFG (Germany); SFI (Ireland); The Swedish Research Council (Sweden); CAS and CNSF (China); and the Alexander von Humboldt Foundation (Germany).
| Funders | Funder number |
|---|---|
| MSMT | |
| National Science Foundation | |
| U.S. Department of Energy | |
| Alexander von Humboldt-Stiftung | |
| CRC Health Group | |
| Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS) | |
| California Earthquake Authority | |
| Kortney Rose Foundation | |
| Natural Sciences and Engineering Research Council of Canada | |
| Canada Foundation for Innovation | |
| Science and Technology Facilities Council | ST/K001604/1, ST/H000992/1, PP/D004284/1 |
| Royal Society | |
| Department of Science and Technology, Ministry of Science and Technology, India | |
| Department of Atomic Energy, Government of India | |
| Science Foundation Ireland | |
| Deutsche Forschungsgemeinschaft | |
| Stichting voor Fundamenteel Onderzoek der Materie | |
| Fundação de Amparo à Pesquisa do Estado de São Paulo | |
| National Natural Science Foundation of China | |
| Grantová Agentura České Republiky | |
| Russian Foundation for Basic Research | |
| Bundesministerium für Bildung und Forschung | |
| Chinese Academy of Sciences | |
| Consejo Nacional de Investigaciones Científicas y Técnicas | |
| Consejo Nacional de Ciencia y Tecnología | |
| Conselho Nacional de Desenvolvimento Científico e Tecnológico | |
| Korea Science and Engineering Foundation | |
| Vetenskapsrådet | |
| Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro | |
| Centre National de la Recherche Scientifique | |
| Federal Agency for Science and Innovation | |
| State Atomic Energy Corporation ROSATOM | |
| Fundação para o Desenvolvimento da UNESP | |
| Secretaría de Ciencia y Técnica, Universidad de Buenos Aires | |
| Institut National de Physique Nucléaire et de Physique des Particules |