Search for First Generation Scalar and Vector Leptoquarks
Collaboration
40 pages
Published in:
- Phys.Rev.D 64 (2001) 092004
e-Print:
- hep-ex/0105072 [hep-ex]
Report number:
- FERMILAB-PUB-01-057-E
Experiments:
Citations per year
Abstract: (arXiv)
We describe a search for the pair production of first-generation scalar and vector leptoquarks in the eejj and enujj channels by the D0 Collaboration. The data are from the 1992--1996 ppbar run at sqrt{s} = 1.8 TeV at the Fermilab Tevatron collider. We find no evidence for leptoquark production; in addition, no kinematically interesting events are observed using relaxed selection criteria. The results from the eejj and enujj channels are combined with those from a previous D0 analysis of the nunujj channel to obtain 95% confidence level (C.L.) upper limits on the leptoquark pair-production cross section as a function of mass and of beta, the branching fraction to a charged lepton. These limits are compared to next-to-leading-order theory to set 95% C.L. lower limits on the mass of a first-generation scalar leptoquark of 225, 204, and 79 GeV/c^2 for beta=1, 1/2, and 0, respectively. For vector leptoquarks with gauge (Yang-Mills) couplings, 95% C.L. lower limits of 345, 337, and 206 GeV/c^2 are set on the mass for beta=1, 1/2, and 0, respectively. Mass limits for vector leptoquarks are also set for anomalous vector couplings.Note:
- 40 pages, 24 figures, submitted to PRD, added missing visitor address, corrected acknowledgements Report-no: Fermilab-Pub-01/057-E
- D0
- anti-p p: colliding beams
- anti-p p: inclusive reaction
- leptoquark: search for
- leptoquark: scalar
- leptoquark: vector
- leptoquark: pair production
- leptoquark: decay modes
- leptoquark: mass
- lower limit
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