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arXiv 1310.0941hep-phhep-ex
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从QCD求和规则计算$B$介子衰变常数$f_{B_c}$、$f_{B_s}$和$f_B$

$B$ Meson Decay Constants $f_{B_c}$, $f_{B_s}$ and $f_B$ from QCD Sum Rules

M. J. Baker, J. Bordes, C. A. Dominguez, J. Peñarrocha, K. Schilcher

摘要:

用勒让德多项式积分核的有限能量QCD求和规则确定了重介子衰变常数$f_{B_c}$,并重新讨论了$f_B$和$f_{B_s}$ .结果表现出良好的稳定性,在很宽的范围内的值的积分半径在复杂的平方能量平面,和勒让德多项式的顺序。结果为$f_{B_c} = 528 \pm 19$ MeV、$f_B = 186 \pm 14$ MeV和$f_{B_s} = 222 \pm 12$ MeV。

英文摘要:

Finite energy QCD sum rules with Legendre polynomial integration kernels are used to determine the heavy meson decay constant $f_{B_c}$, and revisit $f_B$ and $f_{B_s}$. Results exhibit excellent stability in a wide range of values of the integration radius in the complex squared energy plane, and of the order of the Legendre polynomial. Results are $f_{B_c} = 528 \pm 19$ MeV, $f_B = 186 \pm 14$ MeV, and $f_{B_s} = 222 \pm 12$ MeV.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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