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arXiv 1101.4010hep-ph
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核胶子分布对中微子诱导的细夸克产生的影响

Impact of nuclear gluon distributions on neutrino-induced leptoquark production

I. Alikhanov

摘要:

我们分析了中微子诱导的原子核上的细夸克产生。拉格朗日量中的一个轻子项承认中微子与胶子相互作用的可能性。目前对轻夸克质量的下限是1 TeV的顺序取决于轻夸克的量子数和耦合。这种重态可以在超高能宇宙中微子散射过程中产生。四动量转移平方和Bjorken变量在这些过程中同时探测可能达到目前对撞机实验中运动学无法达到的值。研究了核中胶子密度对轻夸克产生截面的影响。我们表明,考虑到核部分子分布的生产阈值转移到显着较低的中微子能量。作为一个特殊的情况下,我们考虑与氧的相互作用,这是丰富的水/冰中微子望远镜。

英文摘要:

We analyze neutrino-induced leptoquark production on atomic nuclei. A leptoquark term in the Lagrangian admits the possibility that neutrinos interact with gluons. The current lower limits on the leptoquark masses are of the order of 1 TeV depending on the leptoquark quantum numbers and couplings. Such heavy states can be produced in ultra-high energy cosmic neutrino scattering processes. The four-momentum transfer squared and the Bjorken variable simultaneously probed in these processes may reach values kinematically inaccessible at present collider experiments. We study the impact of the gluon density in a nucleus on the cross section for the leptoquark production. We show that taking into account the nuclear parton distributions shifts the production threshold to significantly lower neutrino energies. As a particular case we consider the interaction with oxygen, which is abundant in water/ice neutrino telescopes.

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