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arXiv 1202.6660hep-phhep-ex
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“希格斯粒子”有自旋零吗?

Does the `Higgs' have Spin Zero?

John Ellis, Dae Sung Hwang

摘要:

希格斯玻色子的自旋为零。ATLAS和CMS实验最近报道了质量约为125 GeV的事件,这些事件具有希格斯玻色子的一些预期特征。我们解决的问题,是否已经有任何证据表明,这种过剩的自旋为零,以及如何在不久的将来可以证实这种可能性。在γ-γ末态中观察到的过剩不可能有自旋1,留下0和2作为开放的可能性。我们计算的角分布的伽马伽马对从胶子-胶子碰撞中产生的自旋2玻色子的衰变,表明这是独特的和不同的自旋零的情况下。我们还计算了轻子对的分布,将产生在W W* 衰变的自旋2玻色子,这是非常不同的希格斯衰变,并注意到,用于产生多余的事件选择的运动学观察到的W W* 最终状态的自旋2的效率降低。

英文摘要:

The Higgs boson is predicted to have spin zero. The ATLAS and CMS experiments have recently reported of an excess of events with mass ~ 125 GeV that has some of the characteristics expected for a Higgs boson. We address the questions whether there is already any evidence that this excess has spin zero, and how this possibility could be confirmed in the near future. The excess observed in the gamma gamma final state could not have spin one, leaving zero and two as open possibilities. We calculate the angular distribution of gamma gamma pairs from the decays of a spin-two boson produced in gluon-gluon collisions, showing that is unique and distinct from the spin-zero case. We also calculate the distributions for lepton pairs that would be produced in the W W* decays of a spin-two boson, which are very different from those in Higgs decays, and note that the kinematics of the event selection used to produce the excess observed in the W W* final state have reduced efficiency for spin two.

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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