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Title

Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in pp Collisions at s√=1.96  TeV

CollaborationWith : Clark, Allan Geoffrey / Hamilton, Andrew / Lefevre, Régis / Sfyrla, Anna / Shreyber, Irina / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2009, vol. 102, no. 04, p. 041801
Abstract Models of maximal flavor violation (MxFV) in elementary particle physics may contain at least one new scalar SU(2) doublet field ΦFV=(η0,η+) that couples the first and third generation quarks (q1, q3) via a Lagrangian term LFV=ξ13ΦFVq1q3. 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−1 collected by the Collider Dectector at Fermilab II detector in pp collisions at s√=1.96  TeV are analyzed for evidence of the MxFV signature. For a neutral scalar η0 with mη0=200  GeV/c2 and coupling ξ13=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 ξ13 for mη0=180–300  GeV/c2.
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CDF COLLABORATION. Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in pp Collisions at s√=1.96  TeV. In: Physical Review Letters, 2009, vol. 102, n° 04, p. 041801. https://archive-ouverte.unige.ch/unige:38541

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Deposited on : 2014-07-08

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