Three-loop matching coefficients for heavy flavor-changing currents and the phenomenological applications

doi:10.1007/JHEP05(2023)189

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	Three-loop matching coefficients for heavy flavor-changing currents and the phenomenological applications
	Tao, Wei ; Xiao, Zhen-Jun ; Zhu, Ruilin 1,2,3
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2023
期号	5 页码:189
关键词	2-LOOP QCD CORRECTIONS QUARKONIUM WAVE-FUNCTIONS B-C MESON THRESHOLD PRODUCTION LEPTONIC DECAYS NEAR-THRESHOLD LIGHT CURRENTS ANNIHILATION VECTOR CONSTANT
ISSN号	1029-8479
DOI	10.1007/JHEP05(2023)189
英文摘要	Within the framework of non-relativistic QCD (NRQCD) factorization, we compute the matching coefficients between full Quantum Chromodynamics (QCD) and NRQCD for the heavy flavor-changing vector, axial-vector, scalar and pseudo-scalar currents up to next-to-next-to-next-to-leading order ((NLO)-L-3). We accomplish the analytical expressions for the three-loop renormalization constants and the corresponding anomalous dimensions for all of the four NRQCD currents with two different heavy flavors. The three-loop QCD corrections to the matching coefficients turn out to be significantly larger than lower order corrections. By employing the scale relation, we approximately simulate the (NLO)-L-3 correction to the wave functions at the origin for the vector B-c* meson and the pseudo-scalar Bc meson from the known result for the equal-mass heavy quarkonium in potential NRQCD (pNRQCD). We find large cancellations at the third order between the matching coefficients and the wave functions at the origin, and obtain the convergent decay constants of B-c* and Bc up to (NLO)-L-3. We present the complete perturbative QCD predictions for the decay constants, leptonic decay widths, and branching ratios of the beauty-charmed mesons.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/28099]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Nanjing Normal Univ, Dept Phys, Nanjing 210023, Jiangsu, Peoples R China 2.Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210023, Jiangsu, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, Peng Huanwu Innovat Res Ctr, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Tao, Wei,Xiao, Zhen-Jun,Zhu, Ruilin. Three-loop matching coefficients for heavy flavor-changing currents and the phenomenological applications[J]. JOURNAL OF HIGH ENERGY PHYSICS,2023(5):189.
APA	Tao, Wei,Xiao, Zhen-Jun,&Zhu, Ruilin.(2023).Three-loop matching coefficients for heavy flavor-changing currents and the phenomenological applications.JOURNAL OF HIGH ENERGY PHYSICS(5),189.
MLA	Tao, Wei,et al."Three-loop matching coefficients for heavy flavor-changing currents and the phenomenological applications".JOURNAL OF HIGH ENERGY PHYSICS .5(2023):189.