Application of vertex and mass constraints in track-based alignment
Application of vertex and mass constraints in track-based alignment
复制标题
顶点和质量约束在基于轨道的对准中的应用
DOI：
10.1016/j.nima.2012.11.192
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发表时间：
2012
影响因子：
1.4
通讯作者：
S. Viret
中科院分区：
文献类型：
--
作者：
J. Amoraal;J. Blouw;S. Blusk;S. Borghi;S. Borghi;M. Cattaneo;N. Chiapolini;G. Conti;M. Deissenroth;F. Dupertuis;R. Eijk;V. Fave;M. Gersabeck;A. Hicheur;W. Hulsbergen;D. Hutchcroft;A. Kozlinskiy;R. Lambert;F. Maciuc;R. Märki;M. Martinelli;M. Merk;M. Needham;L. Nicolas;J. Palacios;C. Parkes;A. Pellegrino;S. Pozzi;G. Raven;E. Rodrigues;E. Rodrigues;C. Salzmann;M. Schiller;O. Schneider;E. Simioni;O. Steinkamp;J. Tilburg;N. Tuning;U. Uwer;S. Vecchi;S. Viret
使用带电粒子轨迹样本的平面跟踪探测器的软件对准可能导致影响顶点和动量分辨率的全局探测器失真。我们提出了一个对齐过程，约束这样的失真，利用样本的衰变顶点重建从两个或多个轨迹，并把它们的不变质量的约束。我们通过使用D0 → K− π+衰变的不变质量约束顶点样本来说明该方法，以消除LHCb光谱仪中的曲率偏差。
The software alignment of planar tracking detectors using samples of charged particle trajectories may lead to global detector distortions that affect vertex and momentum resolution. We present an alignment procedure that constrains such distortions by making use of samples of decay vertices reconstructed from two or more trajectories and putting constraints on their invariant mass. We illustrate the method by using a sample of invariant-mass constrained vertices from D 0→ K− π+ decays to remove a curvature bias in the LHCb spectrometer.