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A proposal on complementary determination of the effective electro-weak mixing angles via doubly heavy-flavored hadron production at a super Z -factory
Science China Physics, Mechanics & Astronomy ( IF 6.4 ) Pub Date : 2020-04-08 , DOI: 10.1007/s11433-019-1497-9
Xu-Chang Zheng , Chao-Hsi Chang , Tai-Fu Feng

To test the standard model (SM) precisely and to look for the clues deviating from SM, a proposal for determining the effective electro-weak mixing angles sin2 θfeff (particularly f = lept, c, b) is proposed. It is via observing the asymmetries (the forward-backward one AFB, the left-right one ALR and the combined left-right forward-backward one AFBLR) of the doubly heavy-flavored hadrons in the production at a super Z-factory (an e+e collider designed with a luminosity as high as possible for modern-day techniques runs around the center-of-mass energy \(\sqrt s = {m_Z}\)). To see the sensitivity, uncertainties as well as the event accumulation precisely, the observables for describing the asymmetries of the produced hadrons are computed numerically with varying effective mixing angles, and based on the result analyses, it is concluded that the proposal may offer an independent complement determination of the effective mixing angles.

中文翻译:

关于在超级Z工厂通过双重味强子生产补充确定有效电弱混合角的建议

为了测试标准模型(SM)精确和寻找线索从SM偏离,用于确定所述有效电弱混合的提案角罪2 θ ˚F EFF(特别是F = lept,C,B)的建议。它是通过观察超级Z处生产中的双重重味强子的不对称性(前后一A FB,左右一个A LR和左右左右向前一A FB LR)。-factory(a e + e 为现代技术设计的具有尽可能高的发光度的对撞机围绕着质心能量\(\ sqrt s = {m_Z} \)运行。为了准确地看到灵敏度,不确定性以及事件的累积,在不同有效混合角的情况下,通过数值计算描述了所产生强子的不对称性的可观量,并基于结果分析得出结论,该提议可以提供一个独立的补充有效混合角的确定。
更新日期:2020-04-08
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