论文标题
Belle II对长寿命的深色光子的敏感性
Belle II sensitivity to long-lived dark photons
论文作者
论文摘要
在这封信中，我们指出，Belle II实验对明显腐烂的长寿命黑色光子具有独特的敏感性。专注于单个高能光子与一对带有带电的颗粒的签名，我们发现Belle II将能够探测任何其他运行或建议的实验设施无法覆盖的参数空间的大区域。虽然在应用所有选择后，预计在最终状态下带有带电的muons或pions的签名将不含背景，但最终状态电子的情况更加参与，需要深入研究。我们讨论了进一步抑制背景和相应的实验前景的可能方法。
In this letter we point out that the Belle II experiment has a unique sensitivity to visibly decaying long-lived dark photons. Concentrating on the signatures with a single high energy photon in association with a displaced pair of charged particles, we find that Belle II will be able to probe large regions of parameter space that cannot be covered by any other running or proposed experimental facility. While the signature with charged muons or pions in the final state is expected to be background-free after all selections are applied, the case of final state electrons is more involved and requires an in-depth study. We discuss possible ways to further suppress backgrounds and the corresponding experimental prospects.
