Next-to-next-to-leading-order qcd corrections to the hadronic width of pseudoscalar quarkonium
文献类型：期刊论文
| 作者 | Feng, Feng1,2,3; Jia, Yu1,2,4,5; Sang, Wen-Long6 |
| 刊名 | Physical review letters
 |
| 出版日期 | 2017-12-20 |
| 卷号 | 119期号:25页码:6 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/physrevlett.119.252001 |
| 通讯作者 | Sang, wen-long(wlsang@ihep.ac.cn) |
| 英文摘要 | We compute the next-to-next-to-leading-order qcd corrections to the hadronic decay rates of the pseudoscalar quarkonia, at the lowest order in velocity expansion. the validity of nonrelativistic qcd (nrqcd) factorization for inclusive quarkonium decay process, for the first time, is verified to relative order alpha(2)(s). as a by-product, the renormalization group equation of the leading nrqcd four-fermion operator o-1 (s-1(0)) is also deduced to this perturbative order. by incorporating this new piece of correction together with available relativistic corrections, we find that there exists severe tension between the state-of-the-art nrqcd predictions and the measured eta(c) hadronic width and, in particular, the branching fraction of eta(c) -> gamma gamma nrqcd appears to be capable of accounting for.b hadronic decay to a satisfactory degree, and our most refined prediction is br (eta(b) -> gamma gamma) (4.8 +/- 0.7) x 10(-5). |
| WOS关键词 | B-C-MESON ; LEPTONIC DECAYS ; FEYNMAN ; ANNIHILATION ; AMPLITUDES ; PACKAGE |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000418382400003 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177806 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Sang, Wen-Long |
| 作者单位 | 1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China 3.China Univ Min & Technol, Beijing 100083, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China 5.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China 6.Southwest Univ, Sch Phys Sci & Technol, Chongqing 400700, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, Feng,Jia, Yu,Sang, Wen-Long. Next-to-next-to-leading-order qcd corrections to the hadronic width of pseudoscalar quarkonium[J]. Physical review letters,2017,119(25):6. |
| APA | Feng, Feng,Jia, Yu,&Sang, Wen-Long.(2017).Next-to-next-to-leading-order qcd corrections to the hadronic width of pseudoscalar quarkonium.Physical review letters,119(25),6. |
| MLA | Feng, Feng,et al."Next-to-next-to-leading-order qcd corrections to the hadronic width of pseudoscalar quarkonium".Physical review letters 119.25(2017):6. |
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来源：高能物理研究所
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