Precision measurement of the top quark mass from dilepton events at CDF II

Journal Article · Fri Dec 01 00:00:00 EST 2006 · Phys.Rev.D75:031105,2007

OSTI ID:897579

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

We report a measurement of the top quark mass, M{sub t}, in the dilepton decay channel of t{bar t} {yields} b{ell}{prime}{sup +} {nu}{sub {ell}}, {bar b}{ell}{sup -}{bar {nu}}{sub {ell}} using an integrated luminosity of 1.0 fb{sup -1} of p{bar p} collisions collected with the CDF II detector. We apply a method that convolutes a leading-order matrix element with detector resolution functions to form event-by-event likelihoods; we have enhanced the leading-order description to describe the effects of initial-state radiation. The joint likelihood is the product of the likelihoods from 78 candidate events in this sample, which yields a measurement of M{sub t} = 164.5 {+-} 3.9(stat.) {+-} 3.9(syst.) GeV/c{sup 2}, the most precise measurement of M{sub t} in the dilepton channel.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 897579
• Report Number(s): FERMILAB-PUB-06-490-E; arXiv eprint number hep-ex/0612060; TRN: US200711%%510
• Journal Information: Phys.Rev.D75:031105,2007, Journal Name: Phys.Rev.D75:031105,2007
• Country of Publication: United States
• Language: English

Related Subjects

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