论文标题
$λ_b\ rightarrow j/ψ\ ϕ \λ$衰减
Exotic Hadrons in the $Λ_b \rightarrow J/ψ\ ϕ\ Λ$ Decay
论文作者
论文摘要
我们研究了$λ_b$ baryon的弱衰减到$ j/ψϕλ $中，该过程特别适合分析一些最近观察到的或理论上预测的异国情调的黑龙的物理学，因为人们希望在所有三个最终的两种两种两体通道中都能看到它们的签名。在$ j/ψ\，ϕ $不变的质谱中，我们研究了$ x（4140）$和$ x（4160）$ resonances之间的相互作用。 $ j/ψ\，λ$质量谱系可能有助于确定LHCB合作最近观察到的隐藏障碍五角星的奇怪伙伴，其存在是通过手性统一方法预测的。我们得出的结论是，这个奇怪的Pentaquark是否存在实验性检测，如果它的存在于$ 4450-4500 $ MEV之间。最后，在$ ϕ \，λ$频谱中，我们期望动态产生的共振在$ 2160 $ MEV左右产生贡献，但是对于当前的模型参数，其实验检测几乎没有机会。
We study the weak decay of the $Λ_b$ baryon into $J/ψ ϕ Λ$, a process that is particularly well suited to analyze the physics of some of the recently observed or theoretically predicted exotic hadrons, as one expects to see their signature in all three final two-body channels. In the $J/ψ\, ϕ$ invariant mass spectrum we study the interplay between the $X(4140)$ and the $X(4160)$ resonances. The $J/ψ\, Λ$ mass spectrum may help to identify the strange partner of the hidden-charm pentaquark recently observed by the LHCb collaboration, the existence of which has been predicted by a chiral unitary approach. We conclude that this strange pentaquark has a good chance of experimental detection if it is present in the range between $4450-4500$ MeV. Finally, in the $ϕ\, Λ$ spectrum we expect a contribution from a dynamically generated resonance at around $2160$ MeV, but with the present model parameters there is little chance for its experimental detection.
