Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in pp-bar Collisions at sqrt[s]=1.96 TeV
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; Paus, Christoph M. E.; Makhoul, Khaldoun; Bauer, Gerry P; ... Show more Show less
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Alternative title
Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in pp̅ Collisions at √s=1.96 TeV
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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].
Date issued
2009-01Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
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
ISSN
0031-9007