Search for Doubly Charged Higgs Boson Pair Production in pp̅ Collisions at √s = 1.96 TeV

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Daniel R. Claes, University of Nebraska-LincolnFollow
Kayle DeVaughan, University of Nebraska-Lincoln
Aaron Dominguez, University of Nebraska-LincolnFollow
Michael Eads, University of Nebraska-LincolnFollow
D. Johnston, University of Nebraska-LincolnFollow
Ioannis Katsanos, University of Nebraska-LincolnFollow
Sudhir Malik, University of Nebraska-LincolnFollow
Gregory Snow, University of Nebraska-LincolnFollow

Date of this Version

2012

Citation

PHYSICAL REVIEW LETTERS 108, 021801 (2012); DOI: 10.1103/PhysRevLett.108.021801

Comments

Copyright 2012 American Physical Society

Abstract

We present a search for pair production of doubly charged Higgs bosons in the processes qq̅→H⁺⁺H^-- decaying through H^±±→τ^±τ^±, µ^±τ^±,µ^±µ^±. The search is performed in pp̅ collisions at a center-of-mass energy of √s = 1.96 TeV using an integrated luminosity of up to 7.0 fb-1 collected by the D0 experiment at the Fermilab Tevatron Collider. The results are used to set 95% C.L. limits on the pair production cross section of doubly charged Higgs bosons and on their mass for different H^±± branching fractions. Models predicting different H^±± decays are investigated. Assuming B(H^±± → τ^±τ^±) = 1 yields an observed (expected) lower limit on the mass of a left-handed H_L^±± boson of 128 (116) GeV and assuming B(H^±± → µ^±τ^±) = 1 the corresponding limits are 144 (149) GeV. In a model with B(H^±± → τ^±τ^±) = B(H^±± → µ^±τ^±) = B(H^±± → µ^±µ^±) 1/3, we obtain M(H_L^±±) > 130 (138) GeV..