论文标题
希格斯（Higgs
Higgs decay to charmonia and the charm-quark Yukawa coupling
论文作者
论文摘要
在2012年希格斯（Higgs Discovery）的巨大胜利之后，能源边界的下一个目标将是研究希格斯（Higgs）属性，并在SM之外寻找下一个规模。在实验上，$ h \ to c \ bar {c} $通道很难挖掘，因为弱宽川耦合和令人生畏的SM di-jet背景。我们建议通过魅力夸克（Charm-Quark）的碎片来测试LHC和未来强子玻色子腐烂到$ j/ψ$的魅力Yukawa耦合。使用非相关量子染色体动力学（NRQCD），我们通过Higgs Boson衰变通道$ H \ to C \ \ bar {C} + J/ψ$（或$η_c$）研究了夏食的产生。我们的结果打开了另一扇门，以改善Yukawa耦合的LHC的确定：这种衰减模式的最终状态非常独特，$ J/ψ\ to e^+e^ - ，\，μ^+μ^ - $，并且通过Charm-quark fragmentation机制增强了分支分数。
After the great triumph of the Higgs discovery in 2012, the next target at the energy frontier will be to study the Higgs properties and to search for the next scale beyond the SM. Experimentally, the $H\to c \bar{c}$ channel would be extremely difficult to dig out because of both the weak Yukawa coupling and the daunting SM di-jet background. We propose to test the charm-quark Yukawa coupling at the LHC and future hadron colliders with the Higgs boson decay to $J/ψ$ via the charm-quark fragmentation. Using the non-relativistic quantum chromodynamics (NRQCD), we study the charmonia production via the Higgs boson decay channel $ H \to c \ \bar{c} + J/ψ$(or $ η_c $), where both the color-singlet and color-octet contributions are considered. Our result opens another door to improve determinations at the LHC of the Higgs Yukawa couplings: the final state from this decay mode is quite distinctive with $J/ψ\to e^+e^-,\, μ^+μ^-$ and the branching fraction is enhanced by the charm-quark fragmentation mechanism.
