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	ファンデルメール・スキャン	ミッシング横方向エネルギー
分野	素粒子物理学	素粒子物理学
系統	Process / pipeline	Process / pipeline
提唱年	1985	1990
提唱者	Simon van der Meer	Neutrino physics community (post-1960s)
種類	Luminosity measurement method	Invisible particle detection method
原典	Van der Meer, S. (1985). Stochastic damping of betatron oscillations in the ISR. CERN-ISR-PO/85-5.	Khachatryan, V., et al. (CMS Collaboration). (2014). Performance of missing transverse momentum reconstruction in proton-proton collisions at 7 TeV with ATLAS. Journal of High Energy Physics, 2012(07), 167.
別名	beam scan, transverse beam profile, luminosity measurement	MET, missing transverse momentum, invisible energy
関連	3	3
概要	The Van der Meer scan is a precision measurement technique for determining the absolute luminosity at particle colliders by mechanically separating the colliding beams and measuring the collision rate as a function of beam separation. This fundamental calibration is essential for all cross-section measurements and physics analyses at the LHC and other hadron colliders.	Missing transverse energy (MET) is a powerful technique used in high-energy physics to infer the presence of invisible particles, primarily neutrinos, that escape a detector without leaving a trace. By measuring the imbalance of transverse momentum in the event, physicists can detect signatures of weakly interacting particles crucial for studying the Standard Model and searching for new physics beyond it.