Search for Pair Production of Scalar Top Quarks Decaying to a {tau} Lepton and a b Quark in pp Collisions at {radical}(s)=1.96 TeV
Journal Article
·
· Physical Review Letters
- Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
We search for pair production of supersymmetric top quarks (t-tilde{sub 1}), followed by R-parity violating decay t-tilde{sub 1}{yields}{tau}b with a branching ratio {beta}, using 322 pb{sup -1} of pp collisions at {radical}(s)=1.96 TeV collected by the upgraded Collider Detector at Fermilab. Two candidate events pass our final selection criteria, consistent with the standard model expectation. We set upper limits on the cross section {sigma}(t-tilde{sub 1}t-tilde{sub 1})x{beta}{sup 2} as a function of the top-squark mass m(t-tilde{sub 1}). Assuming {beta}=1, we set a 95% confidence level limit m(t-tilde{sub 1})>153 GeV/c{sup 2}. The limits are also applicable to the case of a third-generation scalar leptoquark (LQ{sub 3}) decaying LQ{sub 3}{yields}{tau}b.
- OSTI ID:
- 21134126
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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