希格斯玻色子衰变为夸克偶和Hccbar耦合
Higgs boson decays to quarkonia and the Hccbar coupling
摘要：
本文讨论了希格斯玻色子随光子衰变为夸克偶素的过程。我们确定了一种新的机制，产生这样的最终状态希格斯衰变，导致预测的衰变率，从以前的估计不同的数量级。虽然这些过程的分支比仍然很小，但这些过程在实验上是干净的，并且H \to J/γ + γ衰变应该在14 TeV的LHC上观察到。我们指出，两种不同的生产机制之间的量子干涉使得衰变率敏感的HQQbar耦合。因此，测量H \to J/γ +的衰变率，就可以直接在大型强子对撞机上探测希格斯粒子与粲偶联。我们讨论了观察这些衰变和直接测量的Hccbar耦合的实验前景。
英文摘要：
In this paper we discuss decays of the Higgs boson to quarkonia in association with a photon. We identify a new mechanism for producing such final states in Higgs decays that leads to predictions for the decay rates that differ by an order of magnitude from previous estimates. Although the branching ratios for these processes are still small, the processes are experimentally clean, and the H \to J/ψ+gamma decay should be observable at a 14 TeV LHC. We point out that quantum interference between two different production mechanisms makes the decay rates sensitive to the HQQbar couplings. Consequently, measurements of the H \to J/ψ+gamma decay rate would allow one to probe the Higgs-charm coupling directly at the LHC. We discuss the experimental prospects for the observation of these decays and for the direct measurement of the Hccbar coupling.
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