arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0704.0438hep-ph
收藏

用右手中微子和电弱标度下的高维算符加宽希格斯玻色子玻色子

Broadening the Higgs Boson with Right-Handed Neutrinos and a Higher Dimension Operator at the Electroweak Scale

Michael L. Graesser

摘要:

某些被TeV抑制的高维算符的存在可能为希格斯玻色子衰变成更轻的右手中微子开辟了新的衰变通道。如果希格斯玻色子是轻的,这些通道可能会比所有其他通道占据主导地位。对于质量大于$2 m_W$的希格斯玻色子,新的衰变是次主导的,但仍然令人感兴趣。右手中微子具有宏观的衰变长度,并且大多数衰变到包含轻子和夸克的最终状态。这种情形的一个显著的对撞机特征是一对违反轻子数的位移顶点。一般的运营商进行分析,使用最小的味道违反假设,以说明这些新的衰变过程可以发生,同时保持一致的轻子数违反过程的实验约束。在这种情况下,这些新的衰变模式是否占主导地位的问题被发现关键取决于右手中微子的近似味对称性。

英文摘要:

The existence of certain TeV suppressed higher-dimension operators may open up new decay channels for the Higgs boson to decay into lighter right-handed neutrinos. These channels may dominate over all other channels if the Higgs boson is light. For a Higgs boson mass larger than $2 m_W$ the new decays are subdominant yet still of interest. The right-handed neutrinos have macroscopic decay lengths and decay mostly into final states containing leptons and quarks. A distinguishing collider signature of this scenario is a pair of displaced vertices violating lepton number. A general operator analysis is performed using the minimal flavor violation hypothesis to illustrate that these novel decay processes can occur while remaining consistent with experimental constraints on lepton number violating processes. In this context the question of whether these new decay modes dominate is found to depend crucially on the approximate flavor symmetries of the right-handed neutrinos.

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。

↑