对b→u→ν衰变的SMEFT限制

IF 5 1区物理与天体物理 Q1 PHYSICS, PARTICLES & FIELDS

Journal of High Energy Physics Pub Date : 2023-11-06 DOI:10.1007/jhep11(2023)023

Admir Greljo, Jakub Salko, Aleks Smolkovič, Peter Stangl

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引用次数: 3

摘要

一个抽象的排他半光子b强子衰变(b→u ν)作为探测强、弱电相互作用和提取CKM元素V ub的沙盒。相反，这项工作调查了它们未被开发的潜力，以揭示新的短距离物理学。利用SMEFT作为管道来绘制SM之外的区域，我们证明了b→u→ν的实质性新物理贡献必然与罕见的中性电流b衰变，中性b介子混合或高质量Drell-Yan尾的相关效应有关。我们发现后一种过程的测量强烈地限制了前一种过程的允许偏差。一套完整的树级介质，起源于微扰紫外线模型和匹配维度6，被彻底探索以支持这一断言。作为一个示范应用，我们检验了在V = (ρ， ω)的情况下，从B→V * ν中提取出的最新张力的一种新的物理解释的可行性。

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SMEFT restrictions on exclusive b → uℓν decays

A bstract Exclusive semileptonic b hadron decays ( b → uℓν ) serve as a sandbox for probing strong and electroweak interactions and for extracting the CKM element V ub . Instead, this work investigates their underexplored potential to reveal new short-distance physics. Utilizing SMEFT as a conduit to chart territory beyond the SM, we demonstrate that substantive new physics contributions in b → uℓν are necessarily linked to correlated effects in rare neutral-current b decays, neutral B meson mixing or high-mass Drell-Yan tails. We find that measurements of the latter processes strongly restrict the allowed deviations in the former. A complete set of tree-level mediators, originating from a perturbative ultraviolet model and matching at dimension 6, is thoroughly explored to support this assertion. As a showcase application, we examine the feasibility of a new physics interpretation of the recent tension in exclusive |V ub | extraction from B → Vℓν where V = ( ρ, ω ).

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来源期刊

Journal of High Energy Physics PHYSICS, PARTICLES & FIELDS-

CiteScore

10.00

自引率

46.30%

发文量

2107

审稿时长

12 weeks

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).