Role of the Lambda(+)(c) (2940) in the pi(-)p -> D(-)D(0)p reaction close to threshold
Role of the Lambda(+)(c) (2940) in the pi(-)p -> D(-)D(0)p reaction close to threshold
复制标题
Lambda( )(c) (2940) 在接近阈值的 pi(-)p -> D(-)D(0)p 反应中的作用
DOI：
10.1103/physrevd.92.034029
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发表时间：
2015
影响因子：
5
通讯作者：
Cao Xu
中科院分区：
文献类型：
--
作者：
Xie Ju-Jun;Dong Yu-Bing;Cao Xu
我们报告的理论研究中的反应阈值附近的有效拉格朗日方法。产生过程用-通道介子交换、-通道核子极和-通道交换来描述。在我们的工作中，最终的结果主要来自基态，也主要来自被假定为具有自旋宇称的分子态的激发态。计算了反应的总截面。结果表明，自旋宇称分配的forgives一个相当大的增强的总截面相比，选择。然而，我们的理论结果的总截面是敏感的截止参数的值所涉及的交换离壳粒子的形状因子。此外，我们还计算了二阶微分截面，发现它可以用来确定宇称。预计我们的模型计算可以通过日本J-PARC的未来实验进行测试。
We report on a theoretical study of thereaction near threshold within an effective Lagrangian approach. The production process is described by-channelmeson exchange,-channel nucleon pole, and-channelexchange. In our work, the finalresults from the groundstate and also dominantly from the excitedstate which is assumed as amolecular state with spin parityor. We calculate the total cross section of thereaction. It is shown that the spin-parity assignment offorgives a sizable enhancement for the total cross section in comparison with a choice of. However, our theoretical result of the total cross section is sensitive to the value of the cutoff parameter involved in the form factor of the exchanged off-shell particles. Moreover, we also calculate the second order differential cross section and find it can be used to determine the parity of the. It is expected that our model calculations can be tested by future experiments at J-PARC in Japan.