2025/12/09 by Babaev, Anton
Physics and Astronomy · #Particle physics theoretical and experimental studies #High-Energy Particle Collisions Research #Particle Detector Development and Performance
paper · doi:10.48550/arxiv.2512.08605
Van-der-Meer method is used in hadron colliders for absolute luminosity calibration. In the letter the applicability of the method is discussed when particles desnsity is distorted by hour-glass effect next to interaction point. The study is motivated by close commisioning of Nuclotron based Ion Collider fAcility where hour-glass effected is significant by design. The theoretical van-der-Meer formalism is revised for this case. Importance of hour-glass effect for luminosity measurements and calibration is demonstrated. Also, the general approach to the estimation of van-der-Meer method bias when it is used for non-factorizable beams is proposed.