Transverse spin asymmetries and the electron Yukawa coupling at an FCC-ee
Year: 2024
Type: article
Abstract: We show that measurements of single transverse-spin asymmetries at an e + e − collider can enhance the sensitivity to the electron Yukawa coupling, possibly enabling observation of the Standard Model value for this quantity. We demonstrate that the significance in both the b b ¯ and semileptonic W W final states can be enhanced by factors of up to 3 compared to inclusive cross-section determinations of this coupling for transversely polarized electrons. If the positrons can be simultaneously longitudinally polarized, even at the level of 30%, the significance can be enhanced by a factor of 5 or more. The method utilizes quantum interference between the Higgs signal and the continuum background and is also applicable in other W W and Z Z final states. Published by the American Physical Society 2024
Authors: Radja Boughezal, Frank Petriello, Kağan Şimşek
Institutions: Argonne National Laboratory, Northwestern University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4403683633