We present an alternative implementation of the Kalman filter employed for track fitting within the LHCb experiment. It uses simple parametrizations for the extrapolation of particle trajectories in the field of the LHCb dipole magnet and for the effects of multiple scattering in the detector material. A speedup of more than a factor of four is achieved while maintaining the quality of the estimated track quantities. This Kalman filter implementation could be used in the purely software-based trigger of the LHCb upgrade.

中文翻译：

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用于LHCb的快速通道拟合的参数化卡尔曼滤波器

我们提出用于LHCb实验中的轨道拟合的Kalman滤波器的另一种实现方式。它使用简单的参数化方法对LHCb偶极磁体领域中的粒子轨迹进行外推，并用于检测器材料中的多次散射。在保持估算轨道数量的质量的同时，实现了四倍以上的加速。该卡尔曼滤波器实现可用于LHCb升级的纯基于软件的触发器中。