论文标题
Xenon1t的电子后坐力过量的放热黑介子
Exothermic dark mesons in light of electron recoil excess at XENON1T
论文作者
论文摘要
我们考虑了一种新颖的机制，可以在深色QCD中使用深色介子在近似风味对称性的极限上实现放热暗物质。我们通过部分衡量黑暗的风味对称性，并用依赖风味的指控来取消黑暗部门的手性异常，从而通过$ z'$门户引入了当地的深色$ u（1）'$对称性，以通过$ z'$门户进行交流。在黑暗的黑暗希格斯（Dark Higgs）的vev自发地破坏了黑暗的本地$ u（1）'$之后，黑夸克之间出现了很小的质量分裂，因此，导致深色媒介的较小的分裂质量，以解释Xenon1t中的电子后坐力多余的弹性散射在黑暗的Mesons和Electron之间。 We propose a concrete benchmark model for split dark mesons based on $SU(3)_L\times SU(3)_R/ SU(3)_V$ flavor symmetry and $SU(N_c)$ color group and show that there exists a parameter space making a better fit to the XENON1T data with two correlated peaks from exothermic processes and satisfying the correct relic density, current experimental and theoretical约束。
We consider a novel mechanism to realize exothermic dark matter with dark mesons in the limit of approximate flavor symmetry in a dark QCD. We introduce a local dark $U(1)'$ symmetry to communicate between dark mesons and the Standard Model via $Z'$ portal by partially gauging the dark flavor symmetry with flavor-dependent charges for cancelling chiral anomalies in the dark sector. After the dark local $U(1)'$ is broken spontaneously by the VEV of a dark Higgs, there appear small mass splittings between dark quarks, consequently, leading to small split masses for dark mesons, required to explain the electron recoil excess in XENON1T by the inelastic scattering between dark mesons and electron. We propose a concrete benchmark model for split dark mesons based on $SU(3)_L\times SU(3)_R/ SU(3)_V$ flavor symmetry and $SU(N_c)$ color group and show that there exists a parameter space making a better fit to the XENON1T data with two correlated peaks from exothermic processes and satisfying the correct relic density, current experimental and theoretical constraints.
