Joint Institute for Nuclear Research, Dubna, Russia.
Phys Rev Lett. 2012 Jan 13;108(2):021801. doi: 10.1103/PhysRevLett.108.021801. Epub 2012 Jan 10.
We present a search for pair production of doubly charged Higgs bosons in the processes qq¯→H(++)H(--) decaying through H(±±)→τ(±)τ(±),μ(±)τ(±),μ(±)μ(±). The search is performed in pp¯ 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.
我们提出了一种在 qq¯→H(++)H(--) 过程中搜索双荷iggs 玻色子对产生的方法，其中 H(±±)通过 H(±±)→τ(±)τ(±)、μ(±)τ(±)、μ(±)μ(±)衰变。该搜索是在 Fermilab Tevatron Collider 的 D0 实验中，在质心能量为√s = 1.96 TeV 的 pp¯碰撞中进行的，使用了高达 7.0 fb(-1)的积分亮度。结果用于在不同的 H(±±)分支比下，对双荷iggs 玻色子对产生的截面和它们的质量设定 95%置信度限制。研究了预测不同 H(±±)衰变的模型。假设 B(H(±±)→τ(±)τ(±))=1，得到左-handed H(L)(±±)玻色子质量的观测（预期）下限为 128（116）GeV，假设 B(H(±±)→μ(±)τ(±))=1，则相应的下限为 144（149）GeV。在一个模型中，假设 B(H(±±)→τ(±)τ(±))=B(H(±±)→μ(±)τ(±))=B(H(±±)→μ(±)μ(±))=1/3，我们得到 M(H(L)(±±))>130（138）GeV。
