Search for Doubly-charged Higgs Boson Pair Production in the Decay to mu+mu+mu-mu- in p pbar Collisions at s**1/2=1.96 TeV

TL;DR

This paper reports a search for doubly-charged Higgs boson pairs decaying into four muons in proton-antiproton collisions at 1.96 TeV, setting mass limits in the absence of a signal.

Contribution

First search for doubly-charged Higgs boson pair production in the muon decay channel at the Tevatron, establishing new mass limits.

Findings

No evidence of doubly-charged Higgs bosons was observed.

Mass limits of 118.4 GeV/c2 for left-handed and 98.2 GeV/c2 for right-handed states were set.

The analysis used 113 pb-1 of data collected by the D0 detector.

Abstract

A search for pair production of doubly-charged Higgs bosons in the process p pbar to H++H-- to mu+mu+mu-mu- is performed with the D0 Run II detector at the Fermilab Tevatron. The analysis is based on a sample of inclusive di-muon data collected at an energy of sqrt{s}=1.96 TeV, corresponding to an integrated luminosity of 113 pb-1. In the absence of a signal, 95 % confidence level mass limits of M(H++L)>118.4 GeV/c2 and M(H++R)>98.2 GeV/c2 are set for left-handed and right-handed doubly-charged Higgs bosons, respectively, assuming 100% branching into muon pairs.