论文标题
从风味对称的角度来看，抗tiplet的弱衰变
Weak Decays of Antitriplet Charmed Baryons from the Perspective of Flavor Symmetry
论文作者
论文摘要
在这项工作中，我们为SU（3）备受尊敬和破碎的场景中的两体弱衰减进行了全球效果，并将所有可用数据纳入了最新。在SU（3）不可约的表示方法（IRA）中，考虑到不可约的表示条款的更多幅度，并且在每种情况下都可以预测其系数的范围。通过在这项工作中的各种拟合方案之间进行比较，实验数据更喜欢SU（3）对称性破坏场景。在所选的拟合方案中计算了所有感兴趣的感兴趣，分支的分数和所有Cabibbo最感染（CF），单独的Cabibbo供应（SC）和双重cabbbo抑制的（DCS）通道的不对称。我们的大多数预测与实验数据一致。我们进一步提出了更多的方法来探索Charmed Baryon衰变中的SU（3）对称性。 $α（λ_c^+\ to p k_s）$的改进的测量值是因为两种配件的预测，包括当前工作和较早工作的预测，而POL模型计算更喜欢与先前的实验值相反的符号。给定大多数CF模式的分支分支和所测量的SCS模式的一部分，预计将在BESIII，BELLE/BELLE/BELLE-II和LHCB的实验中检查其余通道的预测，包括DCS模式以及更多的衰减不对称。
In this work, we carry out a global fitting for the two-body weak decays of antitriplet charmed baryons in both SU(3) respected and broken scenarios incorporating all the available data up to date. In the SU(3) irreducible representation approach (IRA), more amplitudes for irreducible representation terms are taken into account and the ranges for their coefficients in each scenarios are predicted. By a comparison among various fitting schemes in this work, experimental data prefer the SU(3) symmetry breaking scenario. Observables of interest, branching fractions and decay asymmetries of all the Cabibbo-favored (CF), singly Cabibbo-suppresed (SCS) and doubly Cabibbo-suppressed (DCS) channels are calculated in the chosen fitting scheme. Most of our predictions are consistent well with experimental data. We further propose more ways to explore the SU(3) symmetry in charmed baryon decays. An improved measurement for $α(Λ_c^+\to p K_S)$ is called for since predictions from both fittings, including the one in current work and earlier works, and the pole model calculation prefer an opposite sign from previous experimental value. Given branching fractions of most of the CF modes and part of the SCS modes being measured, predictions for the remaining channels, including the DCS modes as well as more decay asymmetries, are anticipated to be checked by the upcoming experiments in BESIII, Belle/Belle-II and LHCb.
