An estimate of dibaryon production in the process of pp→d^(∗)(2380)+pn at Panda facility  

作　　者：Yubing Dong Pengnian Shen 董宇兵;沈彭年(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 101408,China)

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 101408,China

出　　处：《Chinese Physics C》2022年第11期91-99,共9页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(11475192);the Sino-German CRC 110"Symmetries and the Emergence of Structure in QCD"project by NSFC(12070131001);the Key Research Program of Frontier Sciences,CAS(Y7292610K1);the National Key Research and Development Program of China(2020YFA0406300);IHEP Innovation Fund(Y4545190Y2)。

摘　　要：Although d∗(2380)was first observed by WASA@COSY,its existence has yet to be further confirmed in different types of processes at other facilities.In this work,the possible production of the single dibaryon state d^(∗)(2380)in the process of pp→d^(∗)(2380)pn in a future experiment at the Panda facility is estimated.Following the method used in our previous study(Chin.Phys.C 46,023105),a phenomenological Lagrangian approach is employed to study the single d^(∗)production.Based on the conclusions obtained by the non-relativistic constituent quark model,the cross section of the pp→d^(∗)(2380)pn reaction via the ΔΔ intermediate state is estimated,which is in the order of nb.It is shown that the dominant contribution comes from the diagram with the ΔΔ→pn subprocess.However,it is difficult to measure owing to the large background.Further,although the cross section of the diagram with the d^(∗)→pn subprocess is small,i.e.,only approximately 3%∼4% of the total cross section or even smaller,the corresponding number of events is still sufficiently large and can be measured at Panda because the outgoing p and n come from the same source d^(∗).

关 键 词：Panda experiments d^(*)(2380)production phenomenological effective Lagrangian approach pp annihilation 

分 类 号：O572.3[理学—粒子物理与原子核物理]