A search for third generation scalar leptoquarks

Thesis/Dissertation · Tue Aug 01 00:00:00 EDT 2006

DOI:https://doi.org/10.2172/900000· OSTI ID:900000

Zatserklyaniy, Andriy ^[1]

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1. Northern Illinois Univ., DeKalb, IL (United States)

Leptoquarks (LQ) are particles with both color and lepton number predicted in some gauge theories and composite models. Current theory suggests that leptoquarks would come in three different generations. We report on a search for charge 1/3 third generation leptoquarks produced in p$$\bar{p}$$ collisions at √s = 1.96 TeV using data collected by the D0 detector at Fermilab. Such leptoquarks would decay into a tau-neutrino plus a b-quark with branching fraction B. We present preliminary results on an analysis where both leptoquarks decay into neutrinos giving a final state with missing energy and two b-jets. Using 425(recorded) pb^-1 of data, we place limits on σ(p$$\bar{p}$$ → LQ$$\bar{LQ}$$)B² as a function of the leptoquark mass. Assuming B = 1, we excluded at the 95% confidence level scalar third generation leptoquarks with M_LQ < 219 GeV.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 900000
• Report Number(s): FERMILAB-THESIS-2006-38; TRN: US200721%%355
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COLOR
COMPOSITE MODELS
DECAY
FERMILAB
LEPTON NUMBER
NEUTRINOS
SCALARS
Experiment-HEP