Systematic uncertainties in integrated luminosity measurement at CEPC
Abstract The very forward region is one of the most challenging regions to instrument at a future e + e - collider. At CEPC, machine-detector interface includes, among others, a calorimeter dedicated for precision measurement of the integrated luminosity at a per mill level or better. Here we review...
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Published in | Journal of instrumentation Vol. 17; no. 9; p. P09014 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Bristol
IOP Publishing
01.09.2022
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Subjects | |
Online Access | Get full text |
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Summary: | Abstract
The very forward region is one of the most challenging
regions to instrument at a future
e
+
e
-
collider. At CEPC,
machine-detector interface includes, among others, a calorimeter
dedicated for precision measurement of the integrated luminosity at
a per mill level or better. Here we review a feasibility of such
precision, from the point of view of systematic effects arising from
luminometer mechanical precision and positioning, beam-related
requirements and physics background from two-photon processes. The
impact of the beam energy spread and its uncertainty on the
integrated luminosity precision is also discussed, as well as the
achievable beam energy spread precision with the post-CDR CEPC
beams. |
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ISSN: | 1748-0221 1748-0221 |
DOI: | 10.1088/1748-0221/17/09/P09014 |