Systematic study of the production of hidden-bottom pentaquarks via gamma p and pi(-) p scatterings

doi:10.1103/PhysRevD.101.034032

	Systematic study of the production of hidden-bottom pentaquarks via gamma p and pi(-) p scatterings
	Wang, Xiao-Yun 1; He, Jun 2,3; Chen, Xurong 4,5,6
刊名	PHYSICAL REVIEW D
	2020-02-26
卷号	101 期号:3 页码:8
ISSN号	2470-0010
DOI	10.1103/PhysRevD.101.034032
通讯作者	He, Jun(junhe@njnu.edu.cn)
英文摘要	In this work, the production of hidden-bottom pentaquark P-b states via gamma p and pi(-) p scatterings is studied within an effective Lagrangian approach and the vector-meson-dominance mechanism. For the P-b production in the process gamma p -> Upsilon p, the dipole Pomeron model is employed to calculate the background contribution, and the experimental data can be well described. For the process pi(-) p -> Upsilon n, the Reggeized t-channel with pi exchange is considered as the main background for the P-b production. The cross section from the t-channel pi exchange is very small due to weak coupling of P-b state to the pi pi channel predicted theoretically. Near the threshold, two-peak structure from the states P-b(11080) and P-b(11125) can be observed if energy bin width is chosen as 0.01 GeV, and the same result is obtained in the pi(-) p scattering. Moreover, by taking the branching ratio of Br[P-b -> pi N] similar or equal to 0.05%, the numerical result shows that the average value of the cross section from the P-b(11080) state produced in the gamma p or pi(-) p scattering reaches at least 0.1 nb with a bin of 0.1 GeV. Even if we reduce the branching ratio of the P-b state into pi N channel by one order, the theoretical average of the cross section from P-b(11080) production in pi(-) p scattering can reach the order of 0.01 nb with a bin of 0.1 GeV, which means that the signal can still be clearly distinguished from the background. The experimental measurements and studies on the hidden-bottom pentaquark P-b state production in the gamma p or pi(-) p scattering near-threshold energy region around W similar or equal to 11 GeV are strongly suggested, which are accessible at COMPASS and JPARC. Particularly, the result of the photoproduction suggests that it is very promising to observe the hidden-bottom pentaquark at the proposed EicC facility in China.
资助项目	National Natural Science Foundation of China[11705076] ; National Natural Science Foundation of China[11675228] ; Key Research Program of the Chinese Academy of Sciences[XDPB09] ; HongLiu Support Funds for Excellent Youth Talents of Lanzhou University of Technology
WOS关键词	VECTOR-MESONS ; PHOTOPRODUCTION ; CHARM ; J/PSI ; VMD
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000517238600002
资助机构	National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; HongLiu Support Funds for Excellent Youth Talents of Lanzhou University of Technology
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/141036]
专题	中国科学院近代物理研究所
通讯作者	He, Jun
作者单位	1.Lanzhou Univ Technol, Dept Phys, Lanzhou 730050, Peoples R China 2.Nanjing Normal Univ, Dept Phys, Nanjing 210097, Jiangsu, Peoples R China 3.Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210097, Jiangsu, Peoples R China 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.South China Normal Univ, Inst Quantum Matter, Guangzhou 510006, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiao-Yun,He, Jun,Chen, Xurong. Systematic study of the production of hidden-bottom pentaquarks via gamma p and pi(-) p scatterings[J]. PHYSICAL REVIEW D,2020,101(3):8.
APA	Wang, Xiao-Yun,He, Jun,&Chen, Xurong.(2020).Systematic study of the production of hidden-bottom pentaquarks via gamma p and pi(-) p scatterings.PHYSICAL REVIEW D,101(3),8.
MLA	Wang, Xiao-Yun,et al."Systematic study of the production of hidden-bottom pentaquarks via gamma p and pi(-) p scatterings".PHYSICAL REVIEW D 101.3(2020):8.