期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.042001
关键词
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资金
- STFC [ST/H001077/1, PP/E000452/1, ST/H001069/1, PP/E002722/1, ST/G502412/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/E000444/1, PPA/A/S/2003/00461/2, PP/E000452/1, ST/H001077/1] Funding Source: researchfish
We present the first direct experimental bound on the total decay width of the top quark, Gamma(t), using 955 pb(-1) of the Tevatron's p (p) over bar collisions recorded by the Collider Detector at Fermilab. We identify 253 top-antitop pair candidate events. The distribution of reconstructed top quark mass from these events is fitted to templates representing different values of the top quark width. Using a confidence interval based on likelihood-ratio ordering, we extract an upper limit at 95% C.L. of Gamma(t) < 13.1 GeV for an assumed top quark mass of 175 GeV/c(2).
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