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arXiv 1802.02769hep-phhep-ex
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辐射$D$中的光子偏振现象是衰减的

The photon polarization in radiative $D$ decays, phenomenologically

Stefan de Boer, Gudrun Hiller

摘要:

我们用辐射$D^0$ -衰变到CP本征态的非标记含时分析的唯象,它允许通过粲介子的有限宽度差来探测光子的偏振。我们发现,$D^0 \to ϕγ$或$D^0 \to \bar K^{0 *} γ$衰变,这是SM为主,或SM样,分别与U-自旋一起允许获得手性预测的辐射衰变振幅。SM中错误手性贡献的数量级可以与$D^0 \to \bar K_1^0 (\to \bar K ππ) γ$中的上下不对称性交叉检查。我们探讨了新的物理在$|Δc|=|Δu|=1$偶极耦合的衰变$D^0 \to ρ^0 γ$的敏感性。指出了用$D_s \to K_1^+( \to K ππ) γ$衰变检验SM的可能性。

英文摘要:

We work out the phenomenology of untagged time-dependent analysis with radiative $D^0$-decays into CP eigenstates, which allows to probe the photon polarization by means of the charm mesons' finite width difference. We show that $D^0 \to ϕγ$ or $D^0 \to \bar K^{0 *} γ$ decays, which are SM-dominated, or SM-like, respectively, together with U-spin allow to obtain chirality-predictions for radiative decay amplitudes. The order of magnitude of wrong-chirality contributions in the SM can be cross-checked with an up-down asymmetry in $D^0 \to \bar K_1^0 (\to \bar K ππ) γ$. We explore the sensitivity to new physics in $|Δc|=|Δu|=1$ dipole couplings in the decays $D^0 \to ρ^0 γ$. We point out the possibility to test the SM with $D_s \to K_1^+( \to K ππ) γ$ decays.

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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