近日，德国锡根大学的Ilija S. Milutin及其研究团队取得一项新进展。经过不懈努力，他们对包容性半轻子B衰变中夸克-强子对偶性违反及高阶1/mb修正进行研究。相关研究成果已于2024年10月23日在国际知名学术期刊《高能物理杂志》上发表。
据悉，对于包容性半轻子B衰变的理论描述和数据已经达到了惊人的精确度。这促使人们重新讨论可能存在的夸克-强子对偶性违反。目前，似乎没有证据表明用于计算这些衰变可观测量的重夸克展开（HQE）存在失效的情况。然而，研究人员可能会遇到一个转折点，即HQE的渐近行为将限制精度的进一步提高。
研究人员讨论了这种可能性，并提出了一个简单模型，可用于研究1/mb展开中更高阶项的影响以及可能的夸克-强子对偶性违反。研究人员设计了仅对这些更高阶效应敏感的可观测量，以测试HQE的行为。利用这些可观测量，研究人员结合测量的q2矩，首次估计了可能的夸克-强子对偶性违反程度。
附：英文原文
Title: Quark-hadron duality violations and higher-order 1/mb corrections in inclusive semileptonic B decays
Author: Mannel, Thomas, Milutin, Ilija S., Verkade, Rens, Vos, K. Keri
Issue&Volume: 2024-10-23
Abstract: The theoretical description and data for inclusive semileptonic B decays have reached incredible precision. This motivated us to re-animate the discussion of possible Quark-Hadron Duality violations. There seems that there is currently no evidence of a failure of the Heavy Quark Expansion (HQE) used to compute observables for these decays. However, we might arrive at a point where an asymptotic behaviour of the HQE would limit a further increase of precision. We discuss this possibility and suggest a simple model, which can be used to study the effects of higher orders in the 1/mb expansion and possible quark-hadron duality violations. We devise observables sensitive only to such higher-order effects to test the behaviour of the HQE. Using these observables we obtain a first estimate of possible quark-hadron duality violations using the measured q2 moments.
DOI: 10.1007/JHEP10(2024)158
Source: https://link.springer.com/article/10.1007/JHEP10(2024)158