This document proposes a collection of simplified models relevant to the design of new-
physics searches at the Large Hadron Collider (LHC) and the characterization of their …

Motivated by recent measurements of the top quark forward-backward asymmetry at the
Tevatron, we study how t-channel new physics can contribute to a large value. We …

We consider the recent measurement of the top quark forward-backward asymmetry at the
Fermilab Tevatron, which shows a discrepancy of slightly more than 2 σ compared to the …

We describe a method to couple Z′ gauge bosons to the standard model (SM), without
charging the SM fields under the U (1)′, but instead through effective higher-dimension …

The top quark forward-backward asymmetry measured at the Tevatron collider shows a
large deviation from standard model expectations. Among possible interpretations, a …

We adopt a Markov chain Monte Carlo method to examine various new physics models
which can generate the forward-backward asymmetry in top quark pair production observed …

We show that the forward-backward asymmetry in top quark pair production can be
enhanced by fields that transform nontrivially under the flavor group and satisfy minimal …

A search for new physics is performed using isolated same-sign dileptons with at least two b-
quark jets in the final state. Results are based on a 4.98 inverse femtobarn sample of proton …

An inclusive search is presented for new physics in events with two isolated leptons (e or μ)
having the same electric charge. The data are selected from events collected from pp …

We report the most restrictive direct limits on masses of fourth-generation down-type quarks
b′, and quarklike composite fermions (B or T 5/3), decaying promptly to t W∓. We search for …