Semileptonic decays of Λc\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Lambda _c$$\end{document} baryons in the relativistic quark model

被引：0
作者：
R. N. Faustov
V. O. Galkin
机构：
[1] Institute of Informatics in Education,
[2] FRC CSC RAS,undefined
来源：
The European Physical Journal C | 2016年 / 76卷 / 11期
关键词：
Semileptonic Decay; Relativistic Quark Model; Move Reference Frame; Convexity Parameter; Baryon Wave Function;
D O I：
10.1140/epjc/s10052-016-4492-z
中图分类号：
学科分类号：
摘要：
Motivated by recent experimental progress in studying weak decays of the Λc\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Lambda _c$$\end{document} baryon we investigate its semileptonic decays in the framework of the relativistic quark model based on the quasipotential approach with the QCD-motivated potential. The form factors of the Λc→Λlνl\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Lambda _c\rightarrow \Lambda l\nu _l$$\end{document} and Λc→nlνl\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Lambda _c\rightarrow nl\nu _l$$\end{document} decays are calculated in the whole accessible kinematical region without extrapolations and additional model assumptions. Relativistic effects are systematically taken into account including transformations of baryon wave functions from the rest to moving reference frame and contributions of the intermediate negative-energy states. Baryon wave functions found in the previous mass spectrum calculations are used for the numerical evaluation. Comprehensive predictions for decay rates, asymmetries and polarization parameters are given. They agree well with available experimental data.
引用
收藏
相关论文
共 41 条
[11]  
Faustov RN(2015)Heavy baryon weak form-factors JHEP 1501 155-undefined
[12]  
Galkin VO(2016)Heavy-to-light baryonic form factors at large recoil JHEP 1602 179-undefined
[13]  
Ebert D(2009)Angular Analysis of the Decay Phys. Rev. D 80 074011-undefined
[14]  
Faustov RN(2011)Perturbative corrections to JHEP 1109 106-undefined
[15]  
Galkin VO(2005) form factors from QCD light-cone sum rules Phys. Rev. C 72 035201-undefined
[16]  
Ebert D(2009)Improved analysis on the semi-leptonic decay Phys. Rev. D 80 096007-undefined
[17]  
Faustov RN(undefined) from QCD light-cone sum rules undefined undefined undefined-undefined
[18]  
Galkin VO(undefined)Form Factors and strong couplings of heavy baryons from QCD light-cone sum rules undefined undefined undefined-undefined
[19]  
Isgur N(undefined)Semileptonic decays of heavy lambda baryons in a quark model undefined undefined undefined-undefined
[20]  
Wise MB(undefined)Semileptonic undefined undefined undefined-undefined
12345