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

CDF Collaboration

doi:10.1103/PhysRevLett.102.041801

Scientific article

English

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

Contributors

CDF Collaboration

Collaborators

Clark, Allan Geoffrey; Hamilton, Andrew; Lefevre, Régis; Sfyrla, Anna; Shreyber, Irina; Vallecorsa, Sofia; Wu, Xin

Published in

Physical review letters, vol. 102, no. 04, 041801

Publication date

2009

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.

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

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. doi: 10.1103/PhysRevLett.102.041801

Article (Published version)

Identifiers

PID : unige:38541
DOI : 10.1103/PhysRevLett.102.041801

Additional URL for this publication

http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.102.041801

Journal ISSN

0031-9007

518views

334downloads

Creation

08/07/2014 10:56:00

First validation

08/07/2014 10:56:00

Update

13/10/2025 22:33:33

Status update

14/03/2023 21:25:58

Last indexation

10/11/2026 16:59:29