Invariant Mass Distribution of Jet Pairs Produced in Association with a W boson in ppbar Collisions at sqrt(s) = 1.96 TeV

TL;DR

This paper analyzes the invariant mass distribution of jet pairs produced with a W boson in proton-antiproton collisions, revealing an excess in the 120-160 GeV/c^2 range that challenges existing theoretical models.

Contribution

It reports the observation of an excess in jet pair invariant mass distribution associated with W bosons, highlighting a potential discrepancy with current predictions.

Findings

Observed excess in 120-160 GeV/c^2 mass range

Excess not explained by current theories

Data collected with 4.3 fb^-1 luminosity

Abstract

We report a study of the invariant mass distribution of jet pairs produced in association with a W boson using data collected with the CDF detector which correspond to an integrated luminosity of 4.3 fb^-1. The observed distribution has an excess in the 120-160 GeV/c^2 mass range which is not described by current theoretical predictions within the statistical and systematic uncertainties. In this letter we report studies of the properties of this excess.