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题名: Strong D* -> D pi and B* -> B pi couplings
作者: El-Bennich, B ;  Ivanov, MA ;  Roberts, CD
刊名: PHYSICAL REVIEW C
出版日期: 2011
卷号: 83, 期号:2, 页码:25205
关键词: ELECTROMAGNETIC FORM-FACTORS ;  DYSON-SCHWINGER EQUATIONS ;  HADRON PHYSICS ;  HEAVY ;  LIGHT ;  QCD
学科分类: Physics
通讯作者: El-Bennich, B (reprint author), Univ Cruzeiro Sul, Lab Fis Teor & Computacao Cient, Rua Galvao Bueno 868, BR-01506000 Sao Paulo, Brazil.
部门归属: [El-Bennich, Bruno] Univ Cruzeiro Sul, Lab Fis Teor & Computacao Cient, BR-01506000 Sao Paulo, Brazil; [El-Bennich, Bruno] Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil; [El-Bennich, Bruno; Ivanov, Mikhail A.; Roberts, Craig D.] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China; [Ivanov, Mikhail A.] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia; [Roberts, Craig D.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA; [Roberts, Craig D.] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
英文摘要: We compute g(D*D pi) and g(B*B pi) using a framework in which all elements are constrained by Dyson-Schwinger equation studies of QCD and therefore incorporates a consistent, direct, and simultaneous description of light and heavy quarks and the states they may constitute. We link these couplings with the heavy-light-meson leptonic decay constants and thereby obtain g(D*D pi) = 15.9(-1.0)(+2.1) and g(B*B pi) = 30.0(-1.4)(+3.2). From the latter, we infer (g) over cap (B) = 0.37(-0.02)(+0.04). A comparison between g(D*D pi) and g(B*B pi) indicates that when the c quark is a system's heaviest constituent, Lambda(QCD)/m(c)-corrections are not under good control.
资助者: Fundacao de Amparo a Pesquisa do Estado de Sao Paulo [2009/51296-1, 2010/05772-3]; Russian Fund for Basic Research [10-02-00368-a]; US Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000287367900007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14410
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Recommended Citation:
El-Bennich, B,Ivanov, MA,Roberts, CD. Strong D* -> D pi and B* -> B pi couplings[J]. PHYSICAL REVIEW C,2011,83(2):25205.
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