The First measurement of the top quark mass at CDF II in the lepton+jets and dilepton channels simultaneously

Journal Article · Mon Sep 01 04:00:00 EDT 2008 · Submitted to Phys.Rev.D

OSTI ID:941185

Aaltonen, T; Adelman, J; Akimoto, T; Albrow, Michael G; Alvarez Gonzalez, B; Amerio, S; Amidei, Dante E; Anastassov, A; Annovi, Alberto; Antos, J; Apollinari, G

The authors present a measurement of the mass of the top quark using data corresponding to an integrated luminosity of 1.9 fb{sup -1} of p{bar p} collisions collected at {radical}s = 1.96 TeV with the CDF II detector at Fermilab's Tevatron. This is the first measurement of the top quark mass using top-antitop pair candidate events in the lepton + jets and dilepton decay channels simultaneously. They reconstruct two observables in each channel and use a non-parametric kernel density estimation technique to derive two-dimensional probability density functions from simulated signal and background samples. The observables are the top quark mass and the invariant mass of two jets from the W decay in the lepton + jets channel, and the top quark mass and the scalar sum of transverse energy of the event in the diletpon channel. They perform a simultaneous fit for the top quark mass and the jet energy scale, which is constrained in situ by the hadronic W boson mass. using 332 lepton + jets candidate events and 144 diletpon candidate events, they measure the top quark mass to be m{sub top} = 171.9 {+-} 1.7 (stat. + JES) {+-} 1.1 (other sys.) GeV/c{sup 2} = 171.9 {+-} 2.0 GeV/c{sup 2}.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 941185
• Report Number(s): FERMILAB-PUB-08-415; arXiv eprint number arXiv:0809.4808
• Journal Information: Submitted to Phys.Rev.D, Journal Name: Submitted to Phys.Rev.D
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DECAY
Experiment-HEP
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
INTERMEDIATE BOSONS
KERNELS
LEPTONS
LUMINOSITY
PROBABILITY DENSITY FUNCTIONS
SCALARS
T QUARKS
TRANSVERSE ENERGY