期刊
PHYSICAL REVIEW LETTERS
卷 106, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.022001
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资金
- DOE (USA)
- NSF (USA)
- CEA (France)
- CNRS/IN2P3 (France)
- FASI (Russia)
- Rosatom (Russia)
- RFBR (Russia)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FAPESP (Brazil)
- FUNDUNESP (Brazil)
- DAE (India)
- DST (India)
- Colciencias (Colombia)
- CONACyT (Mexico)
- KRF (Korea)
- KOSEF (Korea)
- CONICET (Argentina)
- UBACyT (Argentina)
- FOM (The Netherlands)
- STFC (United Kingdom)
- Royal Society (United Kingdom)
- MSMT (Czech Republic)
- GACR (Czech Republic)
- CRC (Canada)
- NSERC (Canada)
- BMBF (Germany)
- DFG (Germany)
- SFI (Ireland)
- Swedish Research Council (Sweden)
- CAS (China)
- CNSF (China)
- STFC [ST/H004068/1, ST/I505756/1, PP/E000487/1, ST/F00754X/1, ST/H001166/1, ST/F007418/1, ST/H00095X/1, ST/J501074/1, ST/H00095X/2, PP/F000863/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H004068/1, ST/H001166/1, ST/H00095X/2, PP/E000487/1, ST/J501074/1, ST/H00095X/1, ST/F007418/1, ST/I505756/1, ST/F00754X/1, PP/D004284/1, PP/F000863/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [0757561] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1066578] Funding Source: National Science Foundation
We extract the total width of the top quark, Gamma(t), from the partial decay width Gamma(t -> Wb) measured using the t-channel cross section for single top-quark production and from the branching fraction B(t -> Wb) measured in t (t) over bar t events using up to 2.3 fb(-1) of integrated luminosity collected by the D0 Collaboration at the Tevatron p (p) over bar Collider. The result is Gamma(t) = 1.99(-0.55)(+0.69) GeV, which translates to a top-quark lifetime of tau(t) = (3.3-(+1.3)(0.9)) x 10(-25) s. Assuming a high mass fourth generation b' quark and unitarity of the four-generation quark-mixing matrix, we set the first upper limit on vertical bar V-tb'vertical bar < 0.63 at 95% C.L.
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