Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in pp Collisions at {radical}(s)=1.96 TeV
- 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)
Models of maximal flavor violation (MxFV) in elementary particle physics may contain at least one new scalar SU(2) doublet field {phi}{sub FV}=({eta}{sup 0},{eta}{sup +}) that couples the first and third generation quarks (q{sub 1}, q{sub 3}) via a Lagrangian term L{sub FV}={xi}{sub 13}{phi}{sub FV}q{sub 1}q{sub 3}. These models have a distinctive signature of same-charge top-quark pairs and evade flavor-changing limits from meson mixing measurements. Data corresponding to 2 fb{sup -1} collected by the Collider Dectector at Fermilab II detector in pp collisions at {radical}(s)=1.96 TeV are analyzed for evidence of the MxFV signature. For a neutral scalar {eta}{sup 0} with m{sub {eta}{sup 0}}=200 GeV/c{sup 2} and coupling {xi}{sub 13}=1, {approx}11 signal events are expected over a background of 2.1{+-}1.8 events. Three events are observed in the data, consistent with background expectations, and limits are set on the coupling {xi}{sub 13} for m{sub {eta}{sup 0}}=180-300 GeV/c{sup 2}.
- OSTI ID:
- 21180155
- Journal Information:
- Physical Review Letters, Vol. 102, Issue 4; Other Information: DOI: 10.1103/PhysRevLett.102.041801; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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