arXiv 1107.11332011-07hep-phhep-ex

Z'玻色子的超对称衰变

Supersymmetric Decays of the Z' Boson

Chun-Fu Chang, Kingman Cheung, Tzu-Chiang Yuan

备注：: 30 pages, including 13 figures. improvements to the presentation and references added
发表信息：: JHEP 09 (2011) 058
DOI：: 10.1007/JHEP09(2011)058

摘要：

研究了Z'玻色子衰变为超对称粒子的过程。我们研究这些超对称模式如何影响Tevatron的电流限制，并在LHC项目的预期灵敏度。利用E_6、U（1）_{B-L}和序贯模型这三种典型的超对称Z'模型，我们证明了由于分支比减弱为轻子对，Tevatron的Z'质量的电流极限可以大大降低。在LHC-7（1 fb^{-1}）中，E_6 Z'玻色子的质量范围约为1.3-1.5 TeV，在LHC-10（10 fb^{-1}）中约为2.5 - 2.6 TeV，在LHC-14（100 fb^{-1}）中约为4.2 - 4.3 TeV。对于U（1）_{B-L} Z'也得到了类似的质量范围。我们还研究了识别各种超对称衰变模式的Z'玻色子的潜力，因为它可能在超对称破缺的详细动力学中起着至关重要的作用。

英文摘要：

The decay of the Z' boson into supersymmetric particles is studied. We investigate how these supersymmetric modes affect the current limits from the Tevatron and project the expected sensitivities at the LHC. Employing three representative supersymmetric Z' models, namely, E_6, U(1)_{B-L}, and the sequential model, we show that the current limits of the Z' mass from the Tevatron could be reduced substantially due to the weakening of the branching ratio into leptonic pairs. The mass reach for the E_6 Z' bosons is about 1.3-1.5 TeV at the LHC-7 (1 fb^{-1}), about 2.5 - 2.6 TeV at the LHC-10 (10 fb^{-1}), and about 4.2 - 4.3 TeV at the LHC-14 (100 fb^{-1}). A similar mass reach for the U(1)_{B-L} Z' is also obtained. We also examine the potential of identifying various supersymmetric decay modes of the Z' boson because it may play a crucial role in the detailed dynamics of supersymmetry breaking.

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