论文标题
八八核Dalitz衰减的解剖的协变模型
A covariant model for the decuplet to octet Dalitz decays
论文作者
论文摘要
在过去的几年中，有可能在Hades中衡量几个重子的Dilepton衰变。 Baryon Dilepton腐烂提供了有关及时区域中巴元的电磁结构的信息。在目前的工作中，我们将$ b^\ prime \研究到e^+ e^ - b $衰减，其中$ b^\ prime $是baryon解剖成员，$ b $是Baryon Octet成员。我们的计算基于协变量的观众夸克模型，在该模型中，夸克核心的贡献与The pion Cloud的$ SU（3）$贡献相辅相成。 Pion云的贡献被证明与研究范围相关。我们介绍了$σ^0（1385）\ e^+ e^ - λ（1116）$和$σ^{+}（1385）\ to e^+ e^+ e^ - σ^+（1193）$衰减的预测，这可能会在近乎将来。还提出了剩余的解剖baryon dalitz衰减的预测。我们得出的结论是，根据Baryons的夸克含量，Baryon Deuplet Dalitz Dalitz Dalitz衰减宽度的幅度不同。我们还得出结论，过渡形式的依赖性对平方动量转移（$ q^2 $）的依赖性对于某些过渡很重要。
In the last years it became possible to measure in HADES the dilepton decays of several baryons. The baryon dilepton decays provide information about the electromagnetic structure of the baryons in the timelike region. In the present work, we study the $B^\prime \to e^+ e^- B$ decays, where $B^\prime$ is a baryon decuplet member and $B$ is a baryon octet member. Our calculations are based on the covariant spectator quark model, where the contribution of the quark core is complemented with an $SU(3)$ contribution from the pion cloud. The pion cloud contribution prove to be relevant in the range of study. We present predictions for the $Σ^0 (1385) \to e^+ e^- Λ(1116)$ and $Σ^{+}(1385) \to e^+ e^- Σ^+(1193)$ decays, which may be tested at HADES in a near future. Predictions for the remaining decuplet baryon Dalitz decays are also presented. We conclude that different orders of magnitudes are expected for the baryon decuplet Dalitz decay widths, according to the quark content of the baryons. We also conclude that the dependence of the transition form factors on the square momentum transfer ($q^2$) is important for some transitions.
