arXiv 1105.22092011-05hep-ph

希格斯三重态模型中单电荷标量衰变产生双电荷标量

Production of doubly charged scalars from the decay of singly charged scalars in the Higgs Triplet Model

A. G. Akeroyd, Hiroaki Sugiyama

备注：: 13 pages, 3 figures, two figures added in v2, to appear in Physical Review D
发表信息：: Phys.Rev.D84:035010,2011
DOI：: 10.1103/PhysRevD.84.035010

摘要：

双荷希格斯玻色子（H^{ \pm \pm }）的存在是希格斯三重态模型（Higgs Triplet Model，HTM）的一个显著特征，在该模型中，中微子从SU（2）_L的三重态表象中的中性标量的真空期望值获得树能级质量。我们指出，在相当大的HTM参数空间中，单电荷希格斯玻色子通过H^ \pm \to H^{ \pm \pm }W^* 衰变为双电荷希格斯玻色子的大分支比是可能的。从产生机制q 'qbar \to W^* \to H^{ \pm \pm }H^^ \mp上述衰变模式将引起H^{ \pm \pm }的成对产生，其横截面可以与标准成对产生机构qqbar \to γ^* 的横截面相比较，Z^* \to H^{++}H^{--}。我们认为，H^ \pm \to H^{ \pm \pm }W^* 的相当大的分支比的存在可以显著增强H^{ \pm \pm }在四轻子通道中的探测前景。此外，由中性三重态标量H^0和A^0产生的衰变H^0 \to H ^\pm W^* 和A^0 \to H^ \pm W^* 也将提供H^ \pm的额外来源，其随后可以衰变为H^{ \pm \pm }。

英文摘要：

The existence of doubly charged Higgs bosons (H^{\pm\pm}) is a distinctive feature of the Higgs Triplet Model (HTM), in which neutrinos obtain tree-level masses from the vacuum expectation value of a neutral scalar in a triplet representation of SU(2)_L. We point out that a large branching ratio for the decay of a singly charged Higgs boson to a doubly charged Higgs boson via H^\pm\to H^{\pm\pm}W^* is possible in a sizeable parameter space of the HTM. From the production mechanism q'qbar\to W^* \to H^{\pm\pm}H^\mp the above decay mode would give rise to pair production of H^{\pm\pm}, with a cross section which can be comparable to that of the standard pair-production mechanism qqbar\to γ^*,Z^* \to H^{++}H^{--}. We suggest that the presence of a sizeable branching ratio for H^\pm\to H^{\pm\pm}W^* could significantly enhance the detection prospects of H^{\pm\pm} in the four-lepton channel. Moreover, the decays H^0\to H^\pm W^* and A^0\to H^\pm W^* from production of the neutral triplet scalars H^0 and A^0 would also provide an additional source of H^\pm, which can subsequently decay to H^{\pm\pm}.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文