Measuring $CP$ violation and mixing in charm with inclusive self-conjugate multibody decay modes

$B\to X_c\boldsymbol{\bar{\boldsymbol{\tau}}}\boldsymbol{\bar{\boldsymbol{\nu}}}$ 衰变作为复共轭极点的探针

$B\to X_c\ell\barν$ Decay as a Probe of Complex Conjugate Poles

本工作讨论B介子遍举衰变中夸克传播子的非平凡解析结构，指出复共轭极点因破坏标准Källén-Lehman谱表示改变衰变率计算并破缺夸克-强子对偶性，探讨其解决$|V_{cb}|$谜题的可能性，发现存在参数区域可同时在1σ内解释$|V_{cb}|$和$B_d^0$介子寿命。

Measurements of branching fractions and CP-violating charge asymmetries in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data

We report on measurements of branching fractions ($\mathcal{B}$) and CP-violating charge asymmetries ($\mathcal{A}_{\rm CP}$) of multibody charmless $B$ decays reconstructed by the Belle II experiment at the SuperKEKB electron-positron collider. We use a sample of collisions collected in 2019 and 2020 at the $Υ(4S)$ resonance and corresponding to $62.8$ fb$^{-1}$ of integrated luminosity. We use simulation to determine optimized event selections. The $ΔE$ and $M_{\rm bc}$ distributions of the resulting samples are fit to determine signal yields of approximately 690, 840, and 380 decays for the…

Penguins, Trees and Final State Interactions in B Decays in Broken SU3

The availability of data on $B_s$ decays to strange quasi-two-body final states, either with or without charmonium opens new possibilities for understanding different contributions of weak diagrams and in particular the relative contributions of tree and penguin diagrams. Corresponding $B_d$ and $B_s$ decays to charge conjugate final states are equal in the SU(3) symmetry limit and the dominant SU(3) breaking mechanism is given by ratios of CKM matrix elements. Final State Interactions effects should be small, because strong interactions conserve $C$ and should tend to cancel in ratios between…

底重子四体衰变中的CP破坏与U-自旋对称性

$CP$-violation and $U$-spin symmetry in four-body bottom baryon decays

本文在U-自旋对称性框架下推导底重子无粲四体衰变的振幅关系，给出CP破坏率不对称性的对称性预言，并证明U-自旋破缺效应会破坏所有领头阶振幅关系。

热与致密核物质中的开粲矢量介子Open-Charm

Open-Charm Vector Mesons in Hot and Dense Nuclear Matter

本研究采用有限温度有限密度QCD求和规则，探究热致密核物质中开粲矢量介子$D_s^{*}$、$D^{*}$的介质性质，明确其质量与衰变常数随温度、密度的变化规律及粒子-反粒子劈裂特征。

D0-anti-D0 Mixing and CP Violation in D0 vs anti-D0 to K*(+-) K(-+) Decays

The noteworthy BaBar and Belle evidence for $D^0$-$\bar{D}^0$ mixing motivates us to study its impact on $D^0\to K^{*\pm} K^\mp$ decays and their CP-conjugate processes. We show that both the $D^0$-$\bar{D}^0$ mixing parameters ($x$ and $y$) and the strong phase difference between $\bar{D}^0\to K^{*\pm}K^\mp$ and $D^0\to K^{*\pm}K^\mp$ transitions ($δ$) can be determined or constrained from the time-dependent measurements of these decay modes. On the $ψ(3770)$ and $ψ(4140)$ resonances at a $τ$-charm factory, it is even possible to determine or constrain $x$, $y$ and $δ$ from the time-independe…

Mass Spectra of Heavy Quarkonia and B_{c} Decay Constant for Static Scalar-Vector Interactions with Relativistic Kinematics

We reproduce masses of the self-conjugate and non-self-conjugate mesons in the context of the spinless Salpeter equation taking into account the relativistic kinematics and the quark spins. The hyperfine splittings for the ${\rm 2S}$ charmonium and ${\rm 1S}$ bottomonium are also calculated. Further, the pseudoscalar and vector decay constants of the $B_{c}$ meson and the unperturbed radial wave function at the origin are also calculated. We have obtained a local equation with a complete relativistic corrections to a class of three attractive static interaction potentials of the general form $…

$B^{\pm}\rightarrow K^{\pm}\pi^{+}\pi^{-}$衰变中$\overline{K}_0^*(1430)^0$与$\rho(770)^0$之间交叉道干涉驱动的局域CP破坏

Localized CP violation driven by cross-channel interference between $\overline{K}_0^*(1430)^0$ and $ρ(770)^0$ in $B^{\pm}\rightarrow K^{\pm}π^{+}π^{-}$ decays

针对B±→K±π+π−衰变中特定相空间区域的CP不对称性异常，采用准两体因子化方案，发现标量与矢量共振的交叉道干涉是其主要动态起源，为高亮度实验提供理论基准。