Top quark mass measurement from dilepton events at CDF II with the matrix-element method

Journal Article · Mon May 01 04:00:00 EDT 2006 · Phys.Rev.D74:032009,2006

DOI:https://doi.org/10.1103/PhysRevD.74.032009· OSTI ID:897902

Abulencia, A; Acosta, D; Adelman, Jahred A; Affolder, T; Akimoto, T; Albrow, M G; Ambrose, D; Amerio, S; Amidei, D; Anastassov, A; Anikeev, K

We describe a measurement of the top quark mass using events with two charged leptons collected by the CDF II detector from p{bar p} collisions with {radical}s = 1.96 TeV at the Fermilab Tevatron. The likelihood in top mass is calculated for each event by convoluting the leading order matrix element describing q{bar q} {yields} t{bar t} {yields} b{ell}{nu}{sub {ell}}{bar b}{ell}{prime} {nu}{sub {ell}}, 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{sup -1}, we observe 33 candidate events and measure M{sub top} = 165.2 {+-} 6.1(stat.) {+-} 3.4(syst.) GeV/c{sup 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.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 897902
• Report Number(s): FERMILAB-PUB-06-174-E; arXiv eprint number hep-ex/0605118
• Journal Information: Phys.Rev.D74:032009,2006, Journal Name: Phys.Rev.D74:032009,2006
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Experiment-HEP
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
LEPTONS
LUMINOSITY
MATRIX ELEMENTS
RESOLUTION
T QUARKS