| Title | NLO effects for doubly heavy baryons in QCD sum rules |
| Authors | Wang, Chen-Yu Meng, Ce Ma, Yan-Qing Chao, Kuang-Ta |
| Affiliation | Peking Univ, Sch Phys, Beijing 100871, Peoples R China Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China |
| Issue Date | 2019 |
| Publisher | PHYSICAL REVIEW D |
| Abstract | With the QCD sum rules approach, we study the newly discovered doubly heavy baryon Xi(++)(cc). We analytically calculate the next-to-leading-order (NLO) contribution to the perturbative part of the J(P) = 1/2(+) baryon current with two identical heavy quarks, and then reanalyze the mass of Xi(++)(cc) at the NLO level. We find that the NLO correction significantly improves both scheme dependence and scale dependence, whereas it is hard to control these theoretical uncertainties at leading order. With the NLO contribution, the baryon mass is estimated to be m(Xi cc++) = 3.66(-0.10)(+0.08) GeV, which is consistent with the LHCb measurement. |
| URI | http://hdl.handle.net/20.500.11897/551472 |
| ISSN | 2470-0010 |
| DOI | 10.1103/PhysRevD.99.014018 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 物理学院 核物理与核技术国家重点实验室 |
