期刊
PHYSICAL REVIEW D
卷 74, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.74.032009
关键词
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资金
- Science and Technology Facilities Council [PPA/A/S/2003/00461/2, PP/E000444/1, PP/E000452/1] Funding Source: researchfish
- STFC [PP/E000452/1] Funding Source: UKRI
We describe a measurement of the top quark mass using events with two charged leptons collected by the CDF II detector from p (p) over bar collisions with root s=1.96 TeV at the Fermilab Tevatron. The likelihood in top quark mass is calculated for each event by convoluting the leading order matrix element describing q (q) over bar -> t (t) over bar -> bl nu(l)(b) over barl(')nu(l) with detector resolution functions. The presence of background events in the data sample is modeled using similar calculations involving the matrix elements for major background processes. In a data sample with integrated luminosity of 340 pb(-1), we observe 33 candidate events and measure M-top=165.2 +/- 6.1(stat.)+/- 3.4(syst.) GeV/c(2). This measurement represents the first application of this method to events with two charged leptons and is the most precise single measurement of the top quark mass in this channel.
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