Direct CKM determination from W decays at future lepton colliders

IF 5.4 1区物理与天体物理 Q1 Physics and Astronomy

Journal of High Energy Physics Pub Date : 2024-11-05 DOI:10.1007/JHEP11(2024)017

David Marzocca, Manuel Szewc, Michele Tammaro

引用次数: 0

Abstract

We project the reach of future lepton colliders for measuring CKM elements from direct observations of W decays. We focus our attention to |V_cs| and |V_cb| determinations, using FCC-ee as case study. We employ state-of-the-art jet flavor taggers to obtain the projected sensitivity, and scan over tagger performances to show their effect. We conclude that future lepton collider can sizeably improve the sensitivity on |V_cs| and |V_cb|, albeit the achievable reach will strongly depend on the level of systematic uncertainties on tagger parameters.

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在未来轻子对撞机上通过 W 衰变直接确定 CKM

我们预测了未来轻子对撞机通过直接观测W衰变来测量CKM元素的范围。我们以FCC-ee为案例，重点关注|Vcs|和|Vcb|的测定。我们采用最先进的喷流味道标记器来获得预测灵敏度，并扫描标记器的性能以显示其效果。我们的结论是，未来的轻子对撞机可以大大提高对|Vcs|和|Vcb|的灵敏度，尽管可达到的程度在很大程度上取决于标记参数的系统不确定性水平。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of High Energy Physics 物理-物理：粒子与场物理

CiteScore

10.30

自引率

46.30%

发文量

2107

审稿时长

1.5 months

期刊介绍： The aim of the Journal of High Energy Physics (JHEP) is to ensure fast and efficient online publication tools to the scientific community, while keeping that community in charge of every aspect of the peer-review and publication process in order to ensure the highest quality standards in the journal. Consequently, the Advisory and Editorial Boards, composed of distinguished, active scientists in the field, jointly establish with the Scientific Director the journal''s scientific policy and ensure the scientific quality of accepted articles. JHEP presently encompasses the following areas of theoretical and experimental physics: Collider Physics Underground and Large Array Physics Quantum Field Theory Gauge Field Theories Symmetries String and Brane Theory General Relativity and Gravitation Supersymmetry Mathematical Methods of Physics Mostly Solvable Models Astroparticles Statistical Field Theories Mostly Weak Interactions Mostly Strong Interactions Quantum Field Theory (phenomenology) Strings and Branes Phenomenological Aspects of Supersymmetry Mostly Strong Interactions (phenomenology).