Contribution to a conference proceedings

PUBDB-2021-02284

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Isolating systematic effects with beam polarisation at e+e- colliders

Beyer, J.DESY* ; List, J. (Corresponding author)DESY*

2021

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Please use a persistent id in citations: doi:10.3204/PUBDB-2021-02284

Report No.: DESY-21-076; arXiv:2105.09691

Abstract: Future high-energy $e^{+}e^{-}$ colliders will provide some of the most precise tests of the Standard Model. Statistical uncertainties are expected to improve by orders of magnitude over current measurements. This provides a new challenge in accurately assessing and minimizing systematic uncertainties. Beam polarisation may hold a unique potential to isolate and determine the size of systematic effects. This study aims to set this hypothesis by setting up a combined fit of systematic effect and electroweak observables that can test different configurations of available beam polarisations and luminosities. A framework for this fit is developed. In a first test it fits the luminosity and polarisation with external constraints to 2-fermion and 4-fermion differential distributions. An implementation of a first systematic - the muon acceptance - shows consistent behaviour in this framework. This lays the groundwork for testing the interplay of systematic and physical effects in the presence or absence of beam polarisation.

Keyword(s): electron positron: annihilation ; electron: polarized beam ; positron: polarized beam ; beam: polarization ; muon ; electroweak interaction ; acceptance ; error: statistical ; numerical calculations: Monte Carlo ; 500 GeV-cms

Note: 9 pages, 7 figures, Talk presented at the International Workshop on Future Linear Colliders (LCWS2021), 15-18 March 2021. C21-03-15.1

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Contributing Institute(s):

1. Experimente an Lepton Collidern (FLC)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. Facility (machine) ILC

Appears in the scientific report 2021

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