Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in pp-bar Collisions at sqrt[s]=1.96 TeV
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Author(s)
Miles, Christopher J.
Leonardo, N.
Knuteson, Bruce O.
Klute, Markus
Iyutin, Boris
Henderson, C.
Hahn, Kristian Allan
Gomez-Ceballos, Guillelmo
Choudalakis, Georgios
Bolshov, Arkadiy
Alternative Title
Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in pp̅ Collisions at √s=1.96 TeV
Date Issued
January 2009
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in pp-bar Collisions at s=1.96 TeV.” Physical Review Letters 102.4 (2009): 041801. © 2009 The American Physical Society
Version
Final published version
Abstract
Models of maximal flavor violation (MxFV) in elementary particle physics may contain at least one new scalar SU(2) doublet field ΦFV=(η[superscript 0],η[superscript +]) that couples the first and third generation quarks (q[subscript 1], q[subscript 3]) via a Lagrangian term L[subscript FV]=ξ[subscript 13]Φ[subscript FV]q[subscript 1]q[subscript 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[superscript -1] collected by the Collider Dectector at Fermilab II detector in pp̅ collisions at √s=1.96 TeV are analyzed for evidence of the MxFV signature. For a neutral scalar η[superscript 0] with m[subscript η[superscript 0]]=200 GeV/c[superscript 2] and coupling ξ[subscript 13]=1, ∼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 ξ[subscript 13] for m[subscript η[superscript 0]]=180–300 GeV/c[superscript 2].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.102.041801
