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000291780 0881_ $$aDESY-PROC-2014-04
000291780 088__ $$2DESY$$aDESY-PROC-2014-04
000291780 1001_ $$aKhaneft, Dmitry$$b0
000291780 1112_ $$aPanic2014$$cHamburg$$d2014-08-25 - 2014-08-29$$gPanic2014$$wGermany
000291780 245__ $$aMeasuring Luminosity at OLYMPUS
000291780 260__ $$aHamburg$$bDeutsches Elektronen-Synchrotron, DESY$$c2014
000291780 300__ $$a173-176
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000291780 520__ $$aThe OLYMPUS experiment~\cite{Milner:2014} seeks to provide a high-precision measurement (\textless1\% error) of the positron-proton versus electron-proton elastic scattering cross-section ratio. This requires fine control of all systematic uncertainties, including the calculation of the luminosity. For this purpose, multiple independent subsystems were operated alongside the main spectrometer during data taking to allow for empirical determination of the luminosity as a function of time. An approximate value is computed based on the parameters of the lepton beam and gaseous target, while small-angle elastic scatters of known cross-section are counted by two sets of ionization-based detector systems. The most precise value comes from counting coincidences of high-rate (pure QED) lepton-lepton scatters using a pair of calorimetric lead fluoride Cherenkov detectors.
000291780 536__ $$0G:(DE-HGF)POF3-611$$a611 - Fundamental Particles and Forces (POF3-611)$$cPOF3-611$$fPOF III$$x0
000291780 588__ $$aDataset connected to DataCite, INSPIRE
000291780 650_7 $$2INSPIRE$$aluminosity
000291780 650_7 $$2INSPIRE$$across section: elastic scattering
000291780 650_7 $$2INSPIRE$$apositron p
000291780 650_7 $$2INSPIRE$$aelectron p: elastic scattering
000291780 650_7 $$2INSPIRE$$across section: ratio
000291780 650_7 $$2INSPIRE$$acalorimeter: lead
000291780 650_7 $$2INSPIRE$$alepton: beam
000291780 650_7 $$2INSPIRE$$aquantum electrodynamics
000291780 650_7 $$2INSPIRE$$aCherenkov counter
000291780 650_7 $$2INSPIRE$$atime dependence
000291780 650_7 $$2INSPIRE$$alepton lepton
000291780 650_7 $$2INSPIRE$$aspectrometer
000291780 650_7 $$2INSPIRE$$asmall-angle
000291780 693__ $$0EXP:(DE-MLZ)NOSPEC-20140101$$5EXP:(DE-MLZ)NOSPEC-20140101$$eNo specific instrument$$x0
000291780 7001_ $$0P:(DE-HGF)0$$aOLYMPUS Collaboration$$b1$$eCollaboration Author
000291780 773__ $$a10.3204/DESY-PROC-2014-04/144
000291780 7870_ $$0PUBDB-2015-03603$$aSchmidt, Alexander et.al.$$dHamburg : Deutsches Elektronen-Synchrotron, DESY, Hamburg, 2014$$iIsPartOf$$rDESY-PROC-2014-04$$tProceedings, 20th International Conference on Particles and Nuclei (PANIC 14)
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