2010/06/30 by Moritz Beckmann, Beckmann, Moritz, Benno List +3
Medicine · Physics and Astronomy · #Data Analysis #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Medical Imaging Techniques and Applications #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #Statistics and Probability (physics.data-an) #hep-ex #physics.data-an
paper · pdf · doi:10.48550/arxiv.1007.0020
7 pages, 4 figures, conference proceeding of International Linear Collider Workshop 2010, Beijing
arxiv created 2010/06/30 · openalex publication_date 2010/06/30 · arxiv updated 2010/07/02 · openalex created_date 2025/10/24 · openalex updated_date 2026/07/28
Kinematic fitting is an important tool to improve the resolution in high-energy physics experiments. At future e+e- colliders, photon radiation parallel to the beam carrying away large amounts of energy and momentum will become a challenge for kinematic fitting. A photon with longitudinal momentum pz(η) is introduced, which is parametrized such that η follows a normal distribution. In the fit, η is treated as having a measured value of zero, which corresponds to pz = 0. As a result, fits with constraints on energy and momentum conservation converge well even in the presence of a highly energetic photon, while the resolution of fits without such a photon is retained. A fully simulated and reconstructed e+e- -> qqqq event sample at sqrt(s) = 500 GeV is used to investigate the performance of this method under realistic conditions, as expected at the International Linear Collider.