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arXiv 0712.0207hep-ph
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监管散装Randall-Sundrum模型和B->K* l+ l '-

Custodial bulk Randall-Sundrum model and B->K* l+ l'-

Sanghyeon Chang, C. S. Kim, Jeonghyeon Song

摘要:

基于SU(2)_LXSU(2)_RXU(1)_(B-L)的Randall-Sundrum模型在树水平上产生了新的由Kaluza-Klein中性规范玻色子介导的变味中性流(FCNC)现象。在解释所观测到的标准模型费米子混合矩阵时,基于普适的5DYukawa耦合和无相消两个自然假设,我们确定了狄拉克体质量参数.从轻子味违反的唯象约束也被用来指定模型。通过对B->K* l+ l '-衰变的综合研究,我们发现只有B->K*ee衰变才具有相当大的新物理效应。在此模型中的前向后不对称的零值位置也进行了评估,与SM的结果约5%的偏差。还提出了其他有效的观测值,例如B->K*ee和B->K*mu mu的两个微分(或部分积分)衰变率的比值。对于M_A^(1)=2-4 TeV的第一种KK规范玻色子,我们的结果与SM的结果有10-20%的偏差。

英文摘要:

The custodial Randall-Sundrum model based on SU(2)_L X SU(2)_R X U(1)_(B-L) generates new flavor-changing-neutral-current (FCNC) phenomena at tree level, mediated by Kaluza-Klein neutral gauge bosons. Based on two natural assumptions of universal 5D Yukawa couplings and no-cancellation in explaining the observed standard model fermion mixing matrices, we determine the bulk Dirac mass parameters. Phenomenological constraints from lepton-flavor-violations are also used to specify the model. From the comprehensive study of B->K* l+ l'-, we found that only the B->K*ee decay has sizable new physics effects. The zero value position of the forward-backward asymmetry in this model is also evaluated, with about 5% deviation from the SM result. Other effective observables are also suggested such as the ratio of two differential (or partially integrated) decay rates of B->K*ee and B->K*mu mu. For the first KK gauge boson mass of M_A^(1)=2-4 TeV, we can have about 10-20% deviation from the SM results.

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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