Study of sequential semileptonic decays of b hadrons produced at the Tevatron

TL;DR

This paper analyzes the rates and kinematic features of lepton pairs from b hadron decays at the Tevatron, revealing discrepancies between observed data and QCD-based simulations, highlighting areas for model improvement.

Contribution

It provides a detailed comparison of experimental data with Monte Carlo predictions for semileptonic b hadron decays, identifying significant mismatches.

Findings

Data poorly described by HERWIG and QQ simulations

Sequential semileptonic decays are major lepton pair sources

Highlights need for improved modeling of b hadron decays

Abstract

We present a study of rates and kinematical properties of lepton pairs contained in central jets with transverse energy E_T > 15 GeV that are produced at the Fermilab Tevatron collider. We compare the data to a QCD prediction based on the HERWIG and QQ Monte Carlo generator programs.We find that the data are poorly described by the simulation, in which sequential semileptonic decays of single b quarks (b --> l c X with c --> l s X) are the major source of such lepton pairs.