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arXiv 0901.3818hep-phhep-ex
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底夸克Yukawa耦合中重s粒子的剩余效应:MSSM和NMSSM的比较研究

Residual effects of heavy sparticles in the bottom quark Yukawa coupling: a comparative study for the MSSM and NMSSM

Wenyu Wang, Zhaohua Xiong, Jin Min Yang

摘要:

如果超粒子相对较重(几TeV),而希格斯扇区不是那么重($m_A$不是那么大),那么希格斯玻色子汤川耦合可以隐藏相当大的超粒子量子效应,这些大的剩余效应可能在可预见的对撞机上探测超对称性方面发挥特殊作用。在本工作中,我们针对hbb耦合中的超对称QCD效应(h是最轻的CP偶希格斯玻色子玻色子),对两种流行的超对称模型:MSSM和NMSSM进行了比较研究。对于这两种模型,超对称QCD在hbb耦合中会留下较大的剩余量子效应,而NMSSM则允许更宽的剩余区域。由于hbb耦合的这些残余效应可能超过20%(因此,$Br(h->bb)/Br(h->ττ)的比率超过40%),未来的测量可能会解开重粒子的影响,甚至区分这两个模型。

英文摘要:

If the sparticles are relatively heavy (a few TeV) while the Higgs sector is not so heavy ($m_A$ is not so large), the Higgs boson Yukawa couplings can harbor sizable quantum effects of sparticles and these large residual effects may play a special role in probing supersymmetry at foreseeable colliders. In this work, focusing on the supersymmetric QCD effects in the hbb coupling (h is the lightest CP-even Higgs boson), we give a comparative study for the two popular supersymmetric models: the MSSM and NMSSM. While for both models the supersymmetric QCD can leave over large residual quantum effects in hbb coupling, the NMSSM can allow for a much broader region of such effects. Since these residual effects can be over 20% for the hbb coupling (and thus over 40% for the ratio $Br(h->bb)/Br(h->ττ)), future measurements may unravel the effects of heavy sparticles or even distinguish the two models.

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。

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