Theoretical estimate of the D* → Dπ decay rate

被引：49
作者：
Becirevic, Damir [1 ]
Sanfilippo, Francesco [1 ]
机构：
[1] Univ Paris 11, Ctr Orsay, Phys Theor Lab, F-91405 Orsay, France
来源：
PHYSICS LETTERS B | 2013年 / 721卷 / 1-3期
关键词：
TWISTED MASS FERMIONS; B-PI; HEAVY MESONS; COUPLINGS; PIONS;
D O I：
10.1016/j.physletb.2013.03.004
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the results of our lattice QCD study of the g(D)*(D pi) coupling, relevant to the D* -> D pi decay. Our computation is made on the gauge field configurations that include N-f = 2 dynamical light quarks by using the twisted mass QCD action. From the results obtained at four different lattice spacings we were able to take for the first time the continuum limit of this quantity computed on the lattice. Our final value, g(c) = 0.53(3)(3), leads to Gamma(D*(+) 13 (D) over bar (0)pi(+)) = (50 +/- 5 +/- 6) key, and is in good agreement with the experimental results for the width of the charged D* meson. (C) 2013 Published by Elsevier B.V.
引用
收藏
页码：94 / 100
页数：7
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