论文标题
在扰动QCD方法中对HADRONIC两体B衰变的全球分析
Global Analysis of hadronic two-body B decays in the perturbative QCD approach
论文作者
论文摘要
基于四夸克有效运营商的风味结构，我们开发了一个自动计算程序来计算HADRONIC两体$ B $ MESON衰变振幅，并将其应用于其在扰动QCD（PQCD）方法中的全球分析中。将$ b \的PQCD分解公式拟合到PP，VP $衰减以强耦合$α_s$与测量的分支比率和直接的CP不对称性，我们确定在光中期轻度中间轻孔分布（LCDAS）中的Gegenbauer矩（LCDAS）。发现大多数合适的twist-2和twist-3 lcdas的Gegenbauer矩适用于伪内科的梅森$ p $（$ p =π$，$ k $）和vector meson $ v $（$ v =ρ$，$ k^*$）在QCD Sum Sum Sum Sum prare中同意的那些同意。还获得了$ b_s $ meson分布幅度和弱相$ ϕ_3（γ）=（75.1 \ pm2.9）^\ circ $与粒子数据组中值一致的弱相参数。将我们的分析扩展到PQCD方法中的更高订单和更高的力量，以及对其他载体的LCDA的全球确定，这是很简单的。
Based on the flavor structure of four-quark effective operators, we develop an automatic computation program to calculate hadronic two-body $B$ meson decay amplitudes, and apply it to their global analysis in the perturbative QCD (PQCD) approach. Fitting the PQCD factorization formulas for $B\to PP,VP$ decays at leading order in the strong coupling $α_s$ to measured branching ratios and direct CP asymmetries, we determine the Gegenbauer moments in light meson light-cone distribution amplitudes (LCDAs). It is found that most of the fitted Gegenbauer moments of the twist-2 and twist-3 LCDAs for the pseudoscalar meson $P$ ($P=π$, $K$) and vector meson $V$ ($V=ρ$, $K^*$) agree with those derived in QCD sum rules. The shape parameter for the $B_s$ meson distribution amplitude and the weak phase $ϕ_3(γ)=(75.1\pm2.9)^\circ$ consistent with the value in Particle Data Group are also obtained. It is straightforward to extend our analysis to higher orders and higher powers in the PQCD approach, and to the global determination of LCDAs for other hadrons.
