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Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in p(p)over-bar Collisions at root s=1.96 TeV

Aaltonen, T; Adelman, J; Akimoto, T; Albrow, MG; Gonzalez, BA; Amerio, S; Amidei, D; ... CDF Collaboration, ; + view all (2009) Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in p(p)over-bar Collisions at root s=1.96 TeV. PHYS REV LETT , 102 (4) , Article 041801. 10.1103/PhysRevLett.102.041801. Green open access

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Abstract

Models of maximal flavor violation (MxFV) in elementary particle physics may contain at least one new scalar SU(2) doublet field phi(FV) = (eta(0),eta(+)) that couples the first and third generation quarks (q(1), q(3)) via a Lagrangian term L-FV = xi(13)phi(FV)q(1)q(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(-1) collected by the Collider Dectector at Fermilab II detector in p (p) over bar collisions at root s = 1.96 TeV are analyzed for evidence of the MxFV signature. For a neutral scalar eta(0) with m(eta 0) = 200 GeV/c(2) and coupling xi(13) = 1, similar to 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(13) for m(eta 0) = 180-300 GeV/c(2).

Type: Article
Title: Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in p(p)over-bar Collisions at root s=1.96 TeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.102.041801
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.102.041801
Language: English
Additional information: © 2009 The American Physical Society
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/342919
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