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arXiv 1008.5151hep-ph
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基于矢量玻色子融合的LHC自旋诊断

Diagnosing Spin at the LHC via Vector Boson Fusion

Matthew R. Buckley, Michael J. Ramsey-Musolf

摘要:

我们提出了一种新的技术来确定可能在大型强子对撞机上发现的新的大质量粒子的自旋。该方法依赖于对生产的新粒子的运动学制度,其中矢量玻色子融合生产机制得到增强。对于这个政权,我们表明,作为其相对方位角的函数的领先的射流的分布可以用来区分自旋0自旋1/2粒子。我们通过考虑(i)强相互作用的稳定粒子和(ii)携带色荷的超对称粒子的特殊情况来说明这种效应。我们认为,这种方法应该适用于广泛的新的物理场景。

英文摘要:

We propose a new technique for determining the spin of new massive particles that might be discovered at the Large Hadron Collider. The method relies on pair-production of the new particles in a kinematic regime where the vector boson fusion production mechanism is enhanced. For this regime, we show that the distribution of the leading jets as a function of their relative azimuthal angle can be used to distinguish spin-0 from spin-1/2 particles. We illustrate this effect by considering the particular cases of (i) strongly-interacting, stable particles and (ii) supersymmetric particles carrying color charge. We argue that this method should be applicable in a wide range of new physics scenarios.

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