论文标题
发现四链球后，重型四夸克国家
The heavy tetra-quark states after the discovery of tetra-charm states
论文作者
论文摘要
本文专门研究至少部分适用于非相关描述的独家魅力和底部骨料。从简单的Quarkonia和Tetra-Quark Wave功能开始，我们研究了它们的生产横截面，总宽度和更有趣的衰减特性。 特别是，我们计算了基态标量Quarkonia的生产横截面，使结果与文献中出现的值兼容。我们还计算了魅力和底部四夸克的较低能量状态的生产横截面，它们的衰减宽度以及两个$μ\barμ$对的衰减速率，以及$ q \ barqμ\barμ$通道。 我们关于四链球的结果与LHCB协作发布的数据一致，而Tetra-Bottom上的数据与CMS合作所发布的指示达成了合理的协议。我们的横截面分析基于基于NNPDF和CTEQ Collaborations发布的Gluon-Gluon光度网格的插值。硬振幅计算基于树近似中的QCD。我们认为，在LHC处预见的发光度增加后，我们的方法仔细改进，并对实验数据进行了改进，这将使可能在中间能量的QCD进行有价值的测试。
This paper is devoted to the study of exclusive charm and bottom aggregates which are suitable, at least partially, for a non-relativistic description. Starting from a simple choice of quarkonia and tetra-quark wave functions we study their production cross sections, total widths and more interesting decay properties. In particular, we compute the production cross sections of the ground state scalar quarkonia getting results compatible with the values appearing in the literature. We also compute the production cross sections of the lower energy states of the charm and bottom tetra-quarks, their decay widths and the decay rates in two $μ\barμ$ pairs and in the $q\bar qμ\barμ$ channel. Our results on the tetra-charm are consistent with the data published by the LHCb Collaboration and those on the tetra-bottom show a reasonable agreement with the indications published by the CMS Collaboration. Our cross section analyses are based on interpolations based on the gluon-gluon luminosity grids published by the NNPDF and CTEQ Collaborations. The hard amplitude calculations are based on QCD in the tree approximation. We think that a careful improvement of our method and a refinement of the experimental data after the foreseen luminosity increase at the LHC will make possible valuable tests of QCD at the intermediate energies.
