Search for 3rd Generation Vector Leptoquarks in the Di-tau Di-jet Channel in Proton Antiproton Collisions at square √s = 1.96 TeV

Thesis/Dissertation · Sun Jan 01 00:00:00 EST 2006

DOI:https://doi.org/10.2172/897225· OSTI ID:897225

Forrester, Stanley Scott ^[1]

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1. Univ. of California, Davis, CA (United States)

We search for third generation vector leptoquarks (V LQ3) produced in colliding p$$\bar{p}$$ beams operating at √s = 1.96 TeV at the CDF experiment in Run II of the Fermilab Tevatron. We use 322 pb^-1 of data to search for the V LQ3 signal in the di-tau plus di-jet channel. For the first time, the full matrix element is used in the Monte Carlo simulation of this signal. With no events observed in the signal region, we set a 95% C.L. upper limit on the V LQ3 pair production cross section of σ < 344fb, assuming Yang-Mills couplings and Br(V LQ3 → bτ) = 1, and a lower limit on the V LQ3 mass of m_{V LQ3} > 317 GeV=c². If theoretical uncertainties on the cross section are applied in the least favorable manner the results are σ < 360fb and m_{V LQ3} > 294 GeV=c². The Minimal coupling V LQ3 result is an upper limit on the cross section of σ < 493fb (σ < 610fb) and the lower limit on the mass is m_{V LQ3} > 251 GeV=c² (m_{V LQ3} > 223 GeV=c²) for the nominal (1σ varied) theoretical expectation.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 897225
• Report Number(s): FERMILAB-THESIS-2006-28; TRN: US0701469
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTIPROTONS
CROSS SECTIONS
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
MATRIX ELEMENTS
PAIR PRODUCTION
PROTONS
SIMULATION
VECTORS
Experiment-HEP