Top differential cross section measurements (Tevatron)

TL;DR

This paper presents measurements of differential top quark production cross sections at the Fermilab Tevatron, comparing results with Standard Model predictions and setting limits on new physics models involving gravitons.

Contribution

It provides the first differential cross section measurements in the top sector at the Tevatron, testing Standard Model predictions and constraining models with extra dimensions.

Findings

Good agreement with Standard Model predictions

Limits set on graviton parameters in Randall-Sundrum model

Validation of Monte Carlo generator predictions

Abstract

Differential cross sections in the top quark sector measured at the Fermilab Tevatron collider are presented. CDF used 2.7 fb$^{-1}$ of data and measured the differential cross section as a function of the invariant mass of the $t\bar{t}$ system. The measurement shows good agreement with the standard model and furthermore is used to derive limits on the ratio $\kappa /M_{Pl}$ for gravitons which decay to top quarks in the Randall-Sundrum model. D0 used 1.0 fb$^{-1} of data to measure the differential cross section as a function of the transverse momentum of the top quark. The measurement shows a good agreement to the higher order perturbative QCD prediction and various predictions based on various Monte-Carlo generators.