Collider Signals of Maximal Flavor Violation: Same-Sign Leptons from Same-Sign Tops at the Tevatron

TL;DR

This paper investigates the collider signatures of maximal flavor violation models, focusing on same-sign leptons from same-sign top pairs at the Tevatron and LHC, highlighting potential detection prospects.

Contribution

It introduces the phenomenological implications of maximal flavor violation for collider experiments, especially the detection of same-sign top pairs with leptons at Tevatron and LHC.

Findings

Tevatron has strong sensitivity to the signature.

Expected ~12 signal events for 200 GeV scalar and coupling ~1.

Background estimated at 4-5 events.

Abstract

In models of maximal flavor violation (MxFV) there is at least one new scalar $\Phi_{FV}$ which couples to the quarks via $\Phi_{FV} q_i q_j \propto \xi_{ij}$ where $\xi_{i3},\xi_{3i} \sim V_{tb}$ for $i = 1,2$ and $\xi_{33} \sim V_{td}$ and $V$ is the CKM matrix. In this article, we explore the potential phenomenological implications of MxFV for collider experiments. We study MxFV signals of same-sign leptons from same-sign top-quark pair production at the Tevatron and at the LHC. We show that the current Tevatron dataset has strong sensitivity to this signature, for which there are no current limits. For example, if $m_{\Phi_{FV}} \sim 200$ GeV and the MxFV coupling $\xi$ has a natural value of $\sim 1$, we expect $\sim 12$ MxFV events to survive a selection requiring a pair of same-sign leptons, a tagged $b$-jet and missing transverse energy, over a background of approximately 4-5 events.