Measurement of Top Quark Mass from Dilepton Events using Invariant Mass of Lepton and $$b$$-jet in $$p\bar{p}$$ collisions at $$\sqrt{s}=1.8$$ TeV

Thesis/Dissertation · Sat Jun 01 04:00:00 EDT 1996

DOI:https://doi.org/10.2172/1374859· OSTI ID:1374859

Yeh, Ping ^[1]

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1. National Taiwan Univ., Taipei (Taiwan)

The Collider Detector at Fermilab (CDF) has collected 109 inverse picobarn of proton antiproton collision data from the 1992-1996 Tevatron run (Run 1), at a center of mass energy of $$sqrt{s} = 1.8$$ TeV. From the data we observed 10 $$p\bar{p}\to$$ dilepton + dijet + missing transverse energy candidate top quark events with an expectation of 2.0±0.42 events from backgrounds. From this sample of dilepton events, with a simple relation between top quark mass and mean invariant mass between lepton and $$b$$-jet and an algorithm to pair leptons with jets, we have measured the mass of top quark to be $$162 \pm 21 ({\rm stat.})^{+6.8}_{-7.3} ({\rm syst.})$$ GeV /$c^2$, in agreement with results from lepton+jets channel 175.6 ± 5.6 GeV/$c^2$. The possible improvements in the future are also discussed.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1374859
• Report Number(s): FERMILAB-THESIS--1996-38; 435659
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS