MOPM040

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URL	https://doi.org/10.18429/JACoW-IPAC25-MOPM040
Title	Optimized physics performance evaluation of monochromatization interaction region optics for direct s-channel Higgs production at FCC-ee
Authors	Z. Zhang Synchrotron soleil A. Faus-Golfe, A. Korsun Université Paris-Saclay, CNRS/IN2P3, IJCLab D. d'Enterria, F. Zimmermann European Organization for Nuclear Research H. Jiang Lancaster University B. Bai Harbin Institute of Technology Shenzhen Graduate School M. Ruan Institute of High Energy Physics P. Raimondi Fermi National Accelerator Laboratory K. Oide European Organization for Nuclear Research, University of Geneva, High Energy Accelerator Research Organization
Abstract	The measurement of electron Yukawa coupling ($y_{e}$) via direct s-channel Higgs production at $\sim$125 GeV centre-of-mass (CM) energy is significantly facilitated at the FCC-ee, provided that the CM energy spread can be reduced to a level comparable to the natural width of the Higgs boson. This reduction is possible through the “monochromatization” concept, which involves generating opposite correlations between spatial position and energy deviation in the colliding beams. Following initial parametric studies for this collision mode, three different interaction region optics designs, each featuring nonzero horizontal, vertical, or combined dispersion at the interaction point, have been proposed based on the Version 2022 of the FCC-ee Global Hybrid Correction optics. In this paper, we benchmark the upper limits contours on $y_{e}$ with simulated CM energy spread and luminosity using Guinea-Pig, in order to assess, optimize, and compare their physics performances.
Paper	download: MOPM040.pdf
Cite	BibTeX, LaTeX, Text/Word, RIS, EndNote
Conference	16th International Particle Accelerator Conference
Series
Location	Taipei, Taiwan
Date	01-06 Jun 2025
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	* Ming-Chyuan Lin - National Synchrotron Radiation Research Center * Yoichi Sato - KEK * Jui-Che Huang - National Synchrotron Radiation Research Center * David Button - Australian Nuclear Science and Technology Organisation * Ping-Shun Chuang - National Synchrotron Radiation Research Center
Online ISBN	978-3-95450-248-6
Online ISSN	2673-5490
Received	28 May 2025
Revised	06 June 2025
Accepted	06 June 2025
Issued	08 September 2025
DOI	10.18429/JACoW-IPAC25-MOPM040
Pages	406-409
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.