Doubly-heavy baryon weak decays: xi(0)(bc) -> pk(-) and xi(+)(cc) -> sigma(++)(c)(2520)k-
文献类型：期刊论文
| 作者 | Li, Run-Hui1; Lu, Cai-Dian2,3; Wang, Wei4; Yu, Fu-Sheng5,6,7; Zou, Zhi-Tian8 |
| 刊名 | Physics letters b
 |
| 出版日期 | 2017-04-10 |
| 卷号 | 767页码:232-235 |
| 关键词 | Doubly-heavy baryons Electro-weak decays Branching ratios W-exchange process |
| ISSN号 | 0370-2693 |
| DOI | 10.1016/j.physletb.2017.02.003 |
| 通讯作者 | Li, run-hui(lirh@imu.edu.cn) |
| 英文摘要 | Doubly-heavy baryons, with two heavy and one light quarks, are expected to exist in qcd and their masses have been predicted in the quark model. however their existence is not well established so far in experiment. in this work, we explore the possibility of searching for xi(bc) and xi(+)(cc) ccin the w-exchange processes, xi(0)(bc) -> pk(-) and xi(+)(cc) -> sigma(++)(c) -> (2520) k-. on the basis of perturbative calculations, we estimate the branching ratio of the first decay as br(xi(0)(bc)-> p(+) k-) approximate to 3.21 xr(f)(2)xr tau x10(-7), where r-f(r-tau) are the ratios of the decay constants (lifetimes) of xi(0)(bc) and lambda(0)(b). the branching ratio of xi(+)(cc) -> sigma(++)(c) (2520) k- is related to that of lambda(+)(c)-> delta(++) k-, and thereby a conjectured topology analysis leads to the range for the branching ratio as: br(xi(+)(cc) -> sigma(++)(c)(2520) k-) is an element of[0.36%, 1.80%]. the decay xi(+)(cc) -> sigma(++)(c) (2520) k- would be reconstructed in the lambda k-+(c)-pi(+) final state which is easy to access even at a hadron collider. based on the two facts that abundant heavy quarks can be produced at a hadron collider like lhc, and the branching ratios of xi(0)(bc)-> pk(-) and xi(+)(cc) -> sigma(++)(c) (2520) k- are sizable, we urge our experimental colleagues to perform a search at lhcb. this will presumably lead to the discovery of the xi(bc) and xi(+)(cc), and precision measurements of the branching ratios in the future are helpful to investigate their decay mechanism. (c) 2017 the author(s). published by elsevier b.v. |
| WOS关键词 | RELATIVISTIC QUARK-MODEL ; CHARMED BARYONS ; HADRONIC PRODUCTION ; INTRINSIC CHARM ; SUM-RULES ; XI(CC) ; GENERATOR ; XI(BB) ; MASSES |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000397861700035 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176677 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Li, Run-Hui |
| 作者单位 | 1.Inner Mongolia Univ, Sch Phys Sci & Technol, Hohhot 010021, Peoples R China 2.Inst High Energy Phys, YuquanLu 19B, Beijing 100049, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys, YuquanLu 19A, Beijing 100049, Peoples R China 4.Shanghai Jiao Tong Univ, INPAC, Dept Phys & Astron, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China 5.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China 6.Lanzhou Univ, Res Ctr Hadron & CSR Phys, Lanzhou 730000, Peoples R China 7.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 8.Yantai Univ, Dept Phys, Yantai 264055, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Run-Hui,Lu, Cai-Dian,Wang, Wei,et al. Doubly-heavy baryon weak decays: xi(0)(bc) -> pk(-) and xi(+)(cc) -> sigma(++)(c)(2520)k-[J]. Physics letters b,2017,767:232-235. |
| APA | Li, Run-Hui,Lu, Cai-Dian,Wang, Wei,Yu, Fu-Sheng,&Zou, Zhi-Tian.(2017).Doubly-heavy baryon weak decays: xi(0)(bc) -> pk(-) and xi(+)(cc) -> sigma(++)(c)(2520)k-.Physics letters b,767,232-235. |
| MLA | Li, Run-Hui,et al."Doubly-heavy baryon weak decays: xi(0)(bc) -> pk(-) and xi(+)(cc) -> sigma(++)(c)(2520)k-".Physics letters b 767(2017):232-235. |
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