左-右模型中δ F = 2观测量和B -> X_q γ衰变：希格斯粒子的反击
Delta F = 2 observables and B -> X_q gamma decays in the Left-Right Model: Higgs particles striking back
摘要：
本文在弱规范群SU（2）_LxSU（2）_RxU（1）_{B-L}的基础上，对左右模型（LRM）中的Delta S = 2和Delta B = 2过程进行了全面的研究.这包括Delta_K、Delta M_K、Delta M_q、PDMATHABMM_q、Delta Gamma_q（其中q=d、s）以及CP不对称性S_{psi K_S}和S_{psi phi}。与标准模型（SM）相比，这些观测量受到来自重中性Higgs粒子（H^0）的树能级贡献以及新的W_R规范玻色子和带电Higgs（H^ \pm）交换的箱形图的影响。我们还分析了B -> X_{s,d} γ衰变，它从W_L-W_R混合和H^ \pm交换中得到了重要的新贡献。与现有文献相比，我们分析的新特征是寻找各种观测值之间的相关性，这可以帮助我们将该模型与SM的其他扩展区分开来，并深入了解控制右手电流的混合矩阵V^R的结构。我们发现，即使对于M_{H^0} ~ M_{H^\pm} ~ O（20）TeV，树级H^0对Delta F = 2观测量的贡献也是显著的，而H^ \pm对B -> X_q γ的贡献也是非常重要的，甚至对模型的某些参数是显著的.虽然在很大一部分的参数空间，该模型必须与实验约束从K-K的斗争，我们证明了存在的区域在参数空间中，满足所有现有的Δ F = 2，B -> X_{s,d}伽马，树级衰减和电弱精度的限制尺度M_{W_R} \simeq 2- 3 TeV的大型强子对撞机的范围。我们还表明，S_{psi K_S} -PDMATHABMN_K张力存在于SM中可以在LRM中被移除。然而，我们指出，LRM不能帮助解释包容性和排他性决定之间的差异，|V_{ub}|在考虑所有约束条件的情况下。最后，我们提出了一个相当完整的费曼规则列表。
英文摘要：
We present a complete study of Delta S = 2 and Delta B = 2 processes in the left-right model (LRM) based on the weak gauge group SU(2)_L x SU(2)_R x U(1)_{B-L}. This includes epsilon_K, Delta M_K, Delta M_q, A_{SL}^q, Delta Gamma_q with q=d,s and the CP asymmetries S_{psi K_S} and S_{psi phi}. Compared to the Standard Model (SM) these observables are affected by tree level contributions from heavy neutral Higgs particles (H^0) as well as new box diagrams with W_R gauge boson and charged Higgs (H^\pm) exchanges. We also analyse the B -> X_{s,d} gamma decays that receive important new contributions from the W_L-W_R mixing and H^\pm exchanges. Compared to the existing literature the novel feature of our analysis is the search for correlations between various observables that could help us to distinguish this model from other extensions of the SM and to obtain an insight into the structure of the mixing matrix V^R that governs right-handed currents. We find that even for M_{H^0} ~ M_{H^\pm} ~ O(20)TeV, the tree level H^0 contributions to Delta F = 2 observables are by far dominant and the H^\pm contributions to B -> X_q gamma can be very important, even dominant for certain parameters of the model. While in a large fraction of the parameter space this model has to struggle with the experimental constraint from epsilon_K, we demonstrate that there exist regions in parameter space which satisfy all existing Delta F = 2, B -> X_{s,d} gamma, tree level decays and electroweak precision constraints for scales M_{W_R}\simeq2-3TeV in the reach of the LHC. We also show that the S_{psi K_S} - epsilon_K tension present in the SM can be removed in the LRM. However, we point out that the LRM cannot help in explaining the difference between the inclusive and exclusive determinations of |V_{ub}|, when all constraints are taken into account. Finally we present a rather complete list of Feynman rules.
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