标题： RS模型中可达到LHC能级的KK质量的味物理 显示英文标题

标题： Flavour physics of the RS model with KK masses reachable at LHC

摘要： 高维Randall-Sundrum(RS)模型的版本，其中物质存在于体中，解决了规范层次问题，具有额外的吸引力。特别是，它提供了一种内在的几何机制，可以解释标准模型费米子之间大质量层次的起源。在此背景下，解决规范层次问题的好的方案对应于规范玻色子的Kaluza-Klein(KK)激发态的低质量。为了使这些低质量（低至几TeV）与精确的电弱测量一致，已经提出了某些情景。在这里，我们给出了这种RS版本的具体且完整的实现，KK质量小至1 TeV，与味空间中费米子的整体结构一致：(1) 所有最新的夸克/轻子质量及混合角实验数据（包括狄拉克型大质量中微子）都被再现，(2) 满足味改变中性流约束，(3) 非重正化相互作用的有效抑制尺度（在物理基下）在低能味现象学设定的限制之内。我们的结果表明，KK规范玻色子模式可以轻至几TeV，这构成对LHC对撞机上直接信号进行实验搜索的首批理论动机之一，这是容纳费米子质量的这个有趣的RS模型版本。 显示英文摘要

摘要： The version of the higher-dimensional Randall-Sundrum (RS) model with matter in the bulk, which addresses the gauge hierarchy problem, has additional attractive features. In particular, it provides an intrinsic geometrical mechanism that can explain the origin of the large mass hierarchies among the Standard Model fermions. Within this context, a good solution for the gauge hierarchy problem corresponds to low masses for the Kaluza-Klein (KK) excitations of the gauge bosons. Some scenarios have been proposed in order to render these low masses (down to a few TeV) consistent with precision electroweak measurements. Here, we give specific and complete realizations of this RS version with small KK masses, down to 1 TeV, which are consistent with the entire structure of the fermions in flavour space: (1) all the last experimental data on quark/lepton masses and mixing angles (including massive neutrinos of Dirac type) are reproduced, (2) flavour changing neutral current constraints are satisfied and (3) the effective suppression scales of non-renormalizable interactions (in the physical basis) are within the bounds set by low energy flavour phenomenology. Our result, on the possibility of having KK gauge boson modes as light as a few TeV, constitutes one of the first theoretical motivations for experimental searches of direct signatures at the LHC collider, of this interesting version of the RS model which accommodates fermion masses.