Comment on "Monochromatization interaction region optics design for direct s-channel Higgs production at FCC-ee"

TL;DR

This paper critically examines the parameter choices for monochromatization in FCC-ee IR optics design, questioning their realism and highlighting potential issues in the original proposal.

Contribution

It provides a critical commentary on the parameter selection for monochromatization in FCC-ee IR optics, challenging the realism of the original design.

Findings

Original parameters may not be realistic for FCC-ee monochromatization

Raises questions about the feasibility of the proposed IR optics design

Highlights the need for more practical parameter choices

Abstract

The original article [1] can be logically divided into two parts: 1) the selection of main parameters for monochromatization and 2) interaction region optics design; the comment pertains only to the first part. The authors of [1] state that "The purpose of this paper is to report on the development of realistic IR optics designs for monochromatization at the FCC-ee". However, the proposed parameters do not seem very realistic and raise many questions; due to space limitations, we will only consider the most important ones.