Contribution to a conference proceedings/Internal Report

PUBDB-2015-05596

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measuring Luminosity at OLYMPUS

Khaneft, D. ; OLYMPUS Collaboration (Collaboration Author)

2014
Deutsches Elektronen-Synchrotron, DESY Hamburg

This record in other databases:

Please use a persistent id in citations: doi:10.3204/DESY-PROC-2014-04/144

Report No.: DESY-PROC-2014-04

Abstract: The 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.

Keyword(s): luminosity ; cross section: elastic scattering ; positron p ; electron p: elastic scattering ; cross section: ratio ; calorimeter: lead ; lepton: beam ; quantum electrodynamics ; Cherenkov counter ; time dependence ; lepton lepton ; spectrometer ; small-angle

---

Contributing Institute(s):

1. LHC/ATLAS Experiment (ATLAS)
2. LHC/CMS Experiment (CMS)
3. Uni Hamburg / Experimentalphysik (UNI/EXP)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. No specific instrument

---

Database coverage:

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Book/Proceedings/Internal Report Schmidt, A. (Editor)>Extern* ; Sander, C. (Editor)DESY*
Proceedings, 20th International Conference on Particles and Nuclei (PANIC 14)
2014Panic2014, Panic2014, HamburgHamburg, Germany, 25 Aug 2014 - 29 Aug 20142014-08-252014-08-29 Hamburg : Deutsches Elektronen-Synchrotron, DESY 1-754 (2014) [10.3204/DESY-PROC-2014-04]2014     Files  Fulltext BibTeX | EndNote: XML, Text | RIS

---