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The Path to $0.01\%$ Theoretical Luminosity Precision for the FCC-ee
- Publication Year :
- 2018
-
Abstract
- The current status of the theoretical precision for the Bhabha luminometry is critically reviewed and pathways are outlined to the requirement targeted by the FCC-ee precision studies. Various components of the pertinent error budget are discussed in detail -- starting from the context of the LEP experiments, through their current updates, up to prospects of their improvements for the sake of the FCC-ee. It is argued that with an appropriate upgrade of the Monte Carlo event generator BHLUMI and/or other similar MC programs calculating QED effects in the low angle Bhabha process, the total theoretical error of $0.01\%$ for the FCC-ee luminometry can be reached. A new study of the $Z$ and $s$-channel $\gamma$ exchanges within the angular range of the FCC-ee luminometer using the BHWIDE Monte Carlo was instrumental in obtaining the above result. Possible ways of BHLUMI upgrade are also discussed.<br />Comment: This work is based on the material presented at the FCC-ee-Z Theory Miniworkshop at CERN, January 2018", see Section C6 in arxiv:1809.018
- Subjects :
- High Energy Physics - Phenomenology
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1812.01004
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1016/j.physletb.2019.01.012