Bs*BK vertex from QCD sum rules

被引：26

作者：

Cerqueira, A., Jr. ^{[2
]}

Osorio Rodrigues, B. ^{[2
]}

Bracco, M. E. ^{[1
]}

机构：

[1] Univ Estado Rio de Janeiro, Fac Technol, BR-27537000 Resende, RJ, Brazil

[2] Univ Estado Rio de Janeiro, Inst Fis, BR-20550900 Rio De Janeiro, Brazil

来源：

NUCLEAR PHYSICS A | 2012年 / 874卷

关键词：

QCD sum rules; Coupling constant of three-meson processes; Bottom mesons; HEAVY MESONS; D-PI; COUPLINGS; VERTICES; PIONS;

D O I：

10.1016/j.nuclphysa.2011.11.004

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The form factors and the coupling constant of the B-s*BK vertex are calculated using the QCD sum rules method. Three-point correlation functions are computed considering both K and B mesons off-shell and, after an extrapolation of the QCDSR results, we obtain the coupling constant of the vertex. We study the uncertainties in our result by calculating a third form factor obtained when the B-s* is the off-shell meson, considering other acceptable structures and computing the variations of the sum rules' parameters. The form factors obtained have different behaviors but their simultaneous extrapolations reach to the same value of the coupling constant gB(s)*BK = 10.6 +/- 1.7. We compare our result with other theoretical estimates. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：130 / 142

页数：13

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