Parity-violating asymmetries in polarized electron scattering have been interpreted as the asymmetries between opposite helicities of incoming fermion based on the approximation of the spin polarization operator. Here exact calculations of cross sections for parity-violating asymmetries in SLAC E158 and SLD have been performed using spin projection operators. And the parity-violating factor incorporating with spin polarization and momentum has been identified and shown that its sign depends on the spin polarization of incoming particle and the relative velocity of incoming and target particles. Therefore, I suggest a new concept of relative spin polarization to interpret the parity-violating asymmetry as contributed by the antisymmetric nature of the weak interactions depending on whether the spin direction of the incoming electron is inward or outward relative to the target electron.
Extracting Rephase-invariant CP and CPT Violating Parameters from Asymmetries of Time-Ordered Integrated Rates of Correlated Decays of Entangled Mesons
CP violating asymmetries in single top quark production at the Tevatron p pbar collider
在实验室系统中得到了与$p \bar p \to W^* \to t \bar b \to b \bar b W$中的单$t$-夸克产生有关的$b$ -夸克角分布的解析表达式以及由随后的衰变$W \to lν$产生的轻子角分布的解析表达式。假设在$t$ -生产顶点中存在CP破坏。不同的角度和总的截面CP违反不对称性被认为是。还得到了仅在$t$ -衰变顶点中检验CP破坏的关系。数值分析了三线性耦合$A_{\tilde t}$的CP破坏相位对MSSM的影响。不对称性通常为$10^{-3}$ - $10^{-4}$的量级。
T-violating triple product asymmetries in Lambda_b --> Lambda pi pi decay
我们学习Lambda_b--> Lambda pi pi。预测支化分数约为4.38 x 10 ^{-6}%。在标准模型中，由于s_{Lambda_b}（s_Lambda），我们计算出T-奇数三重积不对称性分别约为1.4，4.3，6.5和7.2%。（p_Lambda x p_pi）和p_Lambda（p_pi）。（s_Lambda x s_{Lambda_b}）。
Effects of R-parity violation on CP asymmetries in $Λ_b \to p π$ decay
我们研究了在具有R宇称破坏的最小超对称标准模型中，在$Λ_b \to p π$衰变模中产生的新的CP破坏效应。我们已经估计了R-宇称破坏在多大程度上改变了标准模型对CP不对称性的预测。我们发现，在R-奇偶破坏模型中，速率不对称性（$a_{cp}$）被抑制（约10倍）和不对称性参数$A(α)$增强（约$10^2$倍）相对于SM预测。
Electric dipole moment of top quark and CP-violating asymmetries in gamma gamma -> t tbar
研究了光子-光子碰撞中顶夸克-顶反夸克对的产生和衰变过程中可能存在的顶夸克电偶极相互作用引起的CP破坏不对称性。所定义的不对称性可用于确定电偶极子形状因子的虚部。如果电子束具有纵向偏振，而激光束具有圆偏振，则具有积分几何光度为20 fb^{-1}的电子束的激光后向散射所产生的光子束的伽马-伽马对撞机可以将10^{-17} e cm数量级的极限置于顶夸克的电偶极子形状因子的虚部。
R-parity violation and CP-violating and CP-conserving spin asymmetries in l^+ l^- -> sneutrino -> tau^+ tau^-: probing sneutrino mixing at LEP2, NLC and mu^+mu^- colliders
We analyze the effect of R-parity violation in the minimal supersymmetric standard model on the CP asymmetries in $b\to s γ$ decay. The direct and mixing-induced CP asymmetries arising from the lepton number violating couplings are strongly constrained by the current experimental limits on the corresponding couplings. Allowing a heavy neutrino ($m_{ν_τ}\sim10$ keV) and a moderate mass splitting of sfermions, the direct CP asymmetry around 15 % and the nearly maximal mixing-induced CP asymmetry ($\sim 100 %$) can be realized, depending on the R-parity conserving contributions to the radiative $…
New Physics in b -> s mu+ mu-: CP-Violating Observables
我们全面研究了具有不同洛伦兹结构的新物理算符对涉及b -> s mu+ mu-跃迁的CP破坏观测量的影响。我们研究了新的矢量-轴向矢量（VA）、标量-赝标量（SP）和张量（T）相互作用对Bs -> mu mu、B -> Xs mu mu、Bs -> mu mu gamma、B -> K mu mu和B -> K* mu mu的分支比和前后向不对称性的CP不对称性的影响。在B -> K* mu mu中，我们还探索了纵向极化分数f_L中的直接CP不对称性和角度不对称性A_T^{（2）}和A_{LT}，以及三重积CP不对称性A_T^{（im）}和A^{（im）}_{LT}。我们发现，在几乎所有的情况下，CP破坏的可观测量是敏感的，只有新的物理，涉及VA运营商。因此，VA新物理学可以通过对这些违反CP的可观测量的未来测量的组合分析来明确识别。
Effect of anomalous tbW vertex on decay-lepton distributions in e+e- -> t tbar and CP-violating asymmetries
我们得到了由t（tbar）在e+e-> ttbar中衰变产生的次级轻子l+（l-）的能量和极角双微分分布的解析表达式.我们还得到了各种微分截面与轻子能量积分的解析表达式。在这种情况下，我们发现次级轻子的角分布不依赖于衰变中的反常耦合，而不管e+e- -> t tbar的产生振幅中可能发生的反常耦合。我们的研究包括纵向e-和e+束偏振的影响。我们还研究了轻子能量和光束偏振依赖的某些CP违反轻子角不对称性所产生的异常tbW衰变顶点，并将它们与产生过程中由于CP破坏由于顶电或弱偶极矩的不对称性进行比较。
CP violating asymmetries of b quarks and leptons in e^+e^- \to t\bar t and supersymmetry (review)
本文讨论了在CP破坏假设下，e^+e^- \to t \bar t中单衰变b夸克和轻子的分布.定义了不同的不对称性，它们对产生和衰变中的CP破坏独立敏感，对d^γ和d^Z的实部和虚部敏感。该解析表达式具有一般性，且与CP破坏模型无关.在他们中的大多数都是解析地完成相空间积分。给出了具有复杂耦合的MSSM的数值结果。
We update the bounds on $R$-parity violating supersymmetry originating from meson oscillations in the $B^0_{d/s}$ and $K^0$ systems. To this end, we explicitly calculate all corresponding contributions from $R$-parity violating operators at the one-loop level, thereby completing and correcting existing calculations. We apply our results to the derivation of bounds on $R$-parity violating couplings, based on up-to-date experimental measurements. In addition, we consider the possibility of cancellations among flavor-changing contributions of various origins, e.g. from multiple $R$-parity violati…
We present a reanalysis of nucleon decay in the context of the R-parity violating MSSM, updating bounds on R-parity violating parameters against recent experimental and lattice results. We pay particular attention to the derivation of these constraints and specifically to the hadronic matrix elements, which usually stand as the limiting factor in order to derive reliable bounds, except for these few channels that have been studied on the lattice.
