标题： 光锥QCD求和规则用于半轻子衰变Λ_b → p 轻子 反中微子 显示英文标题

标题： Light-cone QCD sum rules for the semileptonic decay Lambda_b --> p lepton anti-neutrino

摘要： 在全QCD和HQET中，使用光锥求和规则方法研究了独占半轻子重重子衰变\Lambda _b\to p l\bar \nu 。 描述该衰变的形成因子被计算并用于预测衰变宽度和微分分布。 从全QCD得到的总衰变宽度与之前的理论预测一致，而HQET的结果通常小一个数量级。 两种结果都与实验上限一致，未来可以与更精确的实验数据进行比较。 显示英文摘要

摘要： The exclusive semileptonic heavy baryon decay \Lambda_b\to p l\bar\nu is investigated using light-cone sum rule method in both full QCD and HQET. The form factors describing the decay are calculated and used to predict the decay width and differential distribution. The total decay width obtained from full QCD is in agreement with the previous theoretical predictions while the HQET result are typically one order smaller. Both results are consistent with the experimental upper limit and can be compared to the refined experimental data in the future.