Search for pair production of scalar bottom quarks in ppbar collisions at sqrt(s)=1.96 TeV

TL;DR

This paper reports a search for scalar bottom quark pair production in proton-antiproton collisions at 1.96 TeV, using data from the DØ experiment, and sets new exclusion limits on their masses.

Contribution

First search for scalar bottom quark pair production at Tevatron with improved exclusion limits on their masses.

Findings

Data consistent with standard model expectations.

Set 95% C.L. exclusion limits in the (m_sb,m_chi0_1) mass plane.

Significant improvement over previous Run I results.

Abstract

A search for direct production of scalar bottom quarks (sb) is performed with 310 pb-1 of data collected by the DO experiment in ppbar collisions at sqrt(s)=1.96 TeV at the Fermilab Tevatron Collider. The topology analyzed consists of two b jets and an imbalance in transverse momentum due to undetected neutralinos chi0_1, with chi0_1 assumed to be the lightest supersymmetric particle. We find the data consistent with standard model expectations, and set a 95% C.L. exclusion domain in the (m_sb,m_chi0_1) mass plane, improving significantly upon the results from Run I of the Tevatron.