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arXiv 0907.5101hep-phhep-ex
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τ衰变和e+e-截面中三个介子通道的强子化

Hadronization in three meson channels at tau decays and e+e- cross-section

P. Roig

摘要:

τ的半轻子衰变和低能e ~+ e ~-散射到强子中的强子形状因子可以用下列基本特征来描述:低能右手征结构、QCD的大N_C极限和理论的已知渐近行为。所有这些特征都在我们的方法中实现,以达到准确性,并在下文讨论的限制范围内。我们的结果-相对于演讲中所示的结果有所改进(它们对应于2009年4月6日和7日在弗拉斯卡蒂举行的低能物理发生器V工作组中提出的结果),并将其与tau到3 pi nu_tau的数据进行了比较。我们在矢量流中的设置已经用e+e- to KKpi数据进行了检查(使用CVC)。我们预测的强子谱在所有的tau到KKpi nu_tau电荷模式。我们的强子矩阵元素被收录在TAUOLA库中,可能对分析τ衰变的实验合作(BaBar和Belle)以及将来加入这项工作的实验合作(BES,超级B工厂,LHC和未来的对撞机)有用。

英文摘要:

The hadronic form factors in semileptonic decays of the tau and low-energy e+ e- scattering into hadrons can be described accounting for the following fundamental features: the right chiral structure at low energies, the large-N_C limit of QCD and the known asymptotic behaviour of the theory. All these characteristics are implemented within our approach to the accuracy and within the limits discussed below. Our results -improved with respect to those shown in the talk (they correspond to the ones presented in the V Working Group on Generators for Low-Energy Physics held in Frascati the 6th and 7th of April, 2009) are compared to data for tau to 3pi nu_tau. Our setup in the vector current has been checked (using CVC) with e+e- to KKpi data. We predict the hadronic spectra in all tau to KKpi nu_tau charge modes. Our hadronic matrix elements are being included in the TAUOLA library and may be useful for the experimental collaborations that are analysing tau decays (BaBar and Belle) and to those that will join this effort in the future (BES, super-B factories, LHC and future colliders).

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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