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arXiv 1603.09154hep-ph
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QCD中张量介子的电产生

Electroproduction of tensor mesons in QCD

V. M. Braun, N. Kivel, M. Strohmaier, A. A. Vladimirov

摘要:

由于多重极化的可能性,由虚光子或重介子衰变产生的张量介子的硬排它性为研究短距离过程的螺旋度结构提供了有趣的可能性。受BELLE合作组首次测量大动量转移时跃迁形状因子$γ^*γ\to f_2(1270)$的启发,我们在共线因子分解的框架下,对该反应进行了改进的QCD分析,其中包含了扭曲三夸克-反夸克-胶子算符的贡献,并利用光锥求和规则估计了软端点修正.结果似乎是在一个非常好的协议与数据,特别是预测的标度行为在所有情况下重现。

英文摘要:

Due to multiple possible polarizations hard exclusive production of tensor mesons by virtual photons or in heavy meson decays offers interesting possibilities to study the helicity structure of the underlying short-distance process. Motivated by the first measurement of the transition form factor $γ^*γ\to f_2(1270)$ at large momentum transfers by the BELLE collaboration we present an improved QCD analysis of this reaction in the framework of collinear factorization including contributions of twist-three quark-antiquark-gluon operators and an estimate of soft end-point corrections using light-cone sum rules. The results appear to be in a very good agreement with the data, in particular the predicted scaling behavior is reproduced in all cases.

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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