Higgs Mass Constraints on a Fourth Family: Upper and Lower Limits on CKM Mixing
Higgs Mass Constraints on a Fourth Family: Upper and Lower Limits on CKM Mixing
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第四族的希格斯质量约束：CKM 混合的上限和下限
DOI：
10.1103/physrevd.82.035018
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
M. Chanowitz
中科院分区：
文献类型：
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作者：
M. Chanowitz
2010年6月25日希格斯质量对第四族的约束：CKM混合的上限和下限Chanowitz理论物理组劳伦斯伯克利国家实验室加州伯克利大学，加州94720摘要希格斯玻色子质量的理论和实验限制CKM混合的可能的第四个家庭超出了以前获得的限制，从精确的电弱数据。现有的关于m H的实验和理论界限已经显著地限制了允许的参数空间。排除零CKM混合，允许θ Cabbibo阶混合。3- 4CKM混合的上限和下限显示为m H的函数。我们使用电弱工作组的默认输入值，并探索三个和四个族拟合对替代输入值的敏感度。
June 25, 2010 Higgs Mass Constraints on a Fourth Family: Upper and Lower Limits on CKM Mixing Michael S. Chanowitz Theoretical Physics Group Lawrence Berkeley National Laboratory University of California Berkeley, California 94720 Abstract Theoretical and experimental limits on the Higgs boson mass restrict CKM mixing of a possible fourth family beyond the constraints previously obtained from precision electroweak data alone. Existing experimental and theoretical bounds on m H already significantly restrict the allowed parameter space. Zero CKM mixing is excluded and mixing of order θ Cabbibo is allowed. Upper and lower limits on 3-4 CKM mixing are exhibited as a function of m H . We use the default inputs of the Electroweak Work- ing Group and also explore the sensitivity of both the three and four family fits to alternative inputs.