Prospects for sub-EW-scale ALP searches via γ+bb¯ signatures at the LHC using jet substructure techniques

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-09-29 DOI:10.1103/bf6h-573f

Amit Adhikary, Aoife Bharucha, Lorenzo Feligioni, Michele Frigerio

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引用次数: 0

Abstract

The current Large Hadron Collider (LHC) data show no clear indication of new physics and only incremental improvements are anticipated at the energy frontier in the near future. However, while the focus of the LHC has been on constraining TeV scale physics, new particles could still be hiding below the electroweak scale. In order to obtain sensitivity to a new light boson with couplings to SM fermions, a potentially promising decay channel, for resonances with mass ≳O(10)GeV, would be the decay to bb¯ pairs. The measurement of such signatures is challenging due to the trigger requirements at the LHC. In this work, we explore the LHC sensitivity to a light pseudoscalar, or axionlike particle (ALP), in the bb¯ final state with an associated photon, using jet substructure techniques, in the mass range between 10 and 100 GeV. We obtain projected exclusions on the ALP-fermion coupling in a region of phase space which has not so far been probed by direct searches. We further discuss the impact that lower trigger thresholds may have on the LHC reach.

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利用射流子结构技术在大型强子对撞机上通过γ+bb¯特征进行亚ew尺度ALP搜索的前景

目前的大型强子对撞机（LHC）数据没有显示出新物理的明确迹象，在不久的将来，在能量前沿只有渐进的改进。然而，尽管大型强子对撞机的重点是限制TeV尺度的物理，但新粒子仍然可能隐藏在电弱尺度之下。为了获得与SM费米子耦合的新轻玻色子的灵敏度，对于质量为O(10)GeV的共振，一个潜在的有希望的衰减通道将是衰减到bb¯对。由于大型强子对撞机的触发要求，测量这些特征是具有挑战性的。在这项工作中，我们探索了大型强子对撞机在bb¯最终状态下与相关光子的光赝标量或轴子样粒子（ALP）的灵敏度，使用射流子结构技术，质量范围在10到100 GeV之间。我们在相空间的一个区域得到了alp -费米子耦合的投影排除，这是迄今为止还没有被直接搜索到的。我们进一步讨论了较低的触发阈值可能对LHC达到的影响。

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

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.