Measurement of the top quark mass in the lepton+jets channel using the lepton transverse momentum
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- 作者：CDF Collaboration ; T. Aaltonen
- 关键词：Top quark mass ; Lepton momentum spectrum
- 刊名：Physics Letters B
- 出版年：2011
- 出版时间：25 April 2011
- 年：2011
- 卷：698
- 期：5
- 页码：371-379
- 全文大小：780 K
文摘
This Letter reports a measurement of the top quark mass, Mtop, in data from collisions at corresponding to 2.7 fbp>−1 p> of integrated luminosity at the Fermilab Tevatron using the CDF II detector. Events with the lepton+jets topology are selected. An unbinned likelihood is constructed based on the dependence of the lepton transverse momentum, PT, on Mtop. A maximum likelihood fit to the data yields a measured mass Mtop=176.9±8.0stat±2.7syst GeV/cp>2 p>. In this measurement, the contribution by the jet energy scale uncertainty to the systematic error is negligible. The result provides an important consistency test for other Mtop measurements where explicit use of the jet energy is made for deriving the top quark mass.