High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
Phys Rev Lett. 2019 Feb 1;122(4):041803. doi: 10.1103/PhysRevLett.122.041803.
We examine Higgs boson production and decay in heavy-ion collisions at the LHC and future colliders. Owing to the long lifetime of the Higgs boson, its hadronic decays may experience little or no screening from the hot and dense quark-gluon plasma, whereas jets from hard scattering processes and from decays of the electroweak gauge bosons and the top quark suffer significant energy loss. This distinction can lead to enhanced signal to background ratios in hadronic decay channels and thus, for example, provide alternative ways to probe the Yukawa coupling of the Higgs boson to the bottom quark and its lifetime.
我们研究了在 LHC 和未来对撞机中的重离子碰撞中希格斯玻色子的产生和衰变。由于希格斯玻色子的寿命很长，它的强子衰变可能很少或根本不会受到热稠密夸克-胶子等离子体的屏蔽，而来自硬散射过程以及来自电弱规范玻色子和顶夸克衰变的喷流则会经历显著的能量损失。这种区别可以导致在强子衰变道中信号相对于背景的比值增强，因此，例如，可以提供探测希格斯玻色子与底夸克的 Yukawa 耦合及其寿命的替代方法。
