论文标题
使用存档的Aleph $ e^+e^ - $ DATA在91.2 GEV的Anti-K $ _ \ Mathrm {T} $ Jet Spectra和Jet子结构的首次测量
First measurement of anti-k$_\mathrm{T}$ jet spectra and jet substructure using the archived ALEPH $e^+e^-$ data at 91.2 GeV
论文作者
论文摘要
我们使用存档的Aleph $ e^+E^ - $数据在1994年在$ \ sqrt {s} = 91.2 $ gev的质量中心中获取的第一个反k $ _ {t} $喷气频谱和子结构测量结果。喷气机由反K $ _ {T} $算法重建，分辨率参数为0.4。它是对喷气机和QCD的最清洁测试，而没有辐射初始状态的并发症。固定的质量中心能量还允许对PQCD计算进行首次直接测试。我们同时介绍了包容性的射流能谱和领先的Dijet能量光谱，以及许多可观察到的小节。将它们与Pythia6，Pythia8，Sherpa，Herwig，Vincia和Pyquen的预测进行了比较。这些模型均未完全重现数据。还将数据与NLO和NLL'+R重新召集的两个扰动QCD计算进行了比较。结果还可以用作参考测量值，以与Hadronic Collider的结果进行比较。还将讨论未来的方向，包括针对未来电子离子对撞机实验设计的测试喷气聚类算法。
We present the first anti-k$_{T}$ jet spectrum and substructure measurements using the archived ALEPH $e^+e^-$ data taken in 1994 at a center of mass energy of $\sqrt{s} = 91.2$ GeV. Jets are reconstructed with the anti-k$_{T}$ algorithm with a resolution parameter of 0.4. It is the cleanest test of jets and QCD without the complication of hadronic initial states. The fixed center-of-mass energy also allows the first direct test of pQCD calculation. We present both the inclusive jet energy spectrum and the leading dijet energy spectra, together with a number of substructure observables. They are compared to predictions from PYTHIA6, PYTHIA8, Sherpa, HERWIG, VINCIA, and PYQUEN. None of the models fully reproduce the data. The data are also compared to two perturbative QCD calculations at NLO and with NLL'+R resummation. The results can also serve as reference measurements to compare to results from hadronic colliders. Future directions, including testing jet clustering algorithms designed for future electron-ion collider experiments, will also be discussed.
