Search for Long-Lived Doubly Charged Higgs Bosons in pp Collisions at 1/2s = 1.96 TeV

摘要

We present a search for long-lived doubly charged Higgs bosons (H~(±±)), with signatures of high ionization energy loss and muonlike penetration. We use 292 pb~(-1) of data collected in pp collisions at s~(1/2)= 1.96 TeV by the CDF Ⅱ detector at the Fermilab Tevatron. Observing no evidence of long-lived doubly charged particle production, we exclude H_L~(±±) and H_R~(±±) bosons with masses below 133 GeV/c~2 and 109 GeV/c~2, respectively. In the degenerate case we exclude H~(±±) mass below 146 GeV/c~2. All limits are quoted at the 95% confidence level.