hep-ex 篇论文 | Gist.Science

An improved measurement of $η^\prime\rightarrow e^{+}e^{-}ω$

BESIII 合作组利用 $10087 \pm 44 $百万个$ J/\psi $事例，对$ \eta^{\prime}\rightarrow e^{+}e^{-}\omega $衰变进行了高精度测量，确定了其分支比为$ (1.79 \pm 0.09 \pm 0.12) \times 10^{-4}$，并首次报道了该衰变跃迁形状因子的截断参数。

BESIII Collaboration, M. Ablikim, M. N. Achasov + 773 more2026-03-10⚛️ hep-ex

Search for long-lived charginos and $τ$ -sleptons using final states with a disappearing track in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

ATLAS 实验利用 13 TeV 质子 - 质子对撞的 137 fb⁻¹数据，通过寻找包含消失径迹、单喷注和丢失横动量的末态，对长寿命带电轻子（charginos）和τ-超子（τ-sleptons）进行了搜索，未发现显著超出，并据此在 0.01 至 10 纳秒的寿命范围内设定了相应的质量排除上限。

ATLAS Collaboration2026-03-10⚛️ hep-ex

Search for decays of the Higgs boson into pair-produced pseudoscalar particles decaying into $τ^+τ^-τ^+τ^-$ using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

ATLAS 合作组利用 13 TeV 质子 - 质子对撞数据，通过搜索希格斯玻色子衰变为四个τ轻子的过程（ $H\to aa\to \tau^+\tau^-\tau^+\tau^-$ ），未发现显著超出标准模型背景的过量事例，并针对伪标量粒子质量在 15 至 60 GeV 范围内给出了该衰变分支比的 95% 置信度上限。

ATLAS Collaboration2026-03-10⚛️ hep-ex

End-to-end optimisation of HEP triggers

该论文提出了一种将高能量物理实验触发系统设计为受约束的端到端可微优化问题的新范式，通过在统一物理目标下联合优化数据编码、去噪、聚类和校准等所有阶段，在硬件多喷注触发中实现了比传统模块化方法高 2 至 4 倍的信号识别率，同时保留了物理可解释性和校准约束。

Noah Clarke Hall, Ioannis Xiotidis, Nikos Konstantinidis + 1 more2026-03-10⚛️ hep-ex

Amplitude Analysis of Singly Cabibbo-Suppressed Decay $Λ^{+}_{c}\to p K^{+} K^{-}$

BESIII 合作组利用 4.4 fb⁻¹的 $e^+e^-$ 对撞数据，对单卡比博压低衰变 $\Lambda_c^+ \to pK^+K^-$ 进行了振幅分析，首次观测到 $\Lambda_c^+ \to \Lambda(1405)K^+$ 和 $\Lambda_c^+ \to \Lambda(1670)K^+$ 衰变模式，并更新了 $\Lambda_c^+ \to pK^+K^-$ 的分支比测量值，其精度较此前 BESIII 结果提高了约 1.5 倍。

BESIII Collaboration, M. Ablikim, M. N. Achasov + 703 more2026-03-10⚛️ hep-ex

Improved branching-fraction measurements of $B^0_{(s)} \to K_S^0 h^+ h^{'-}$ decays and first observation of $B^0_(s) \to K_S^0 K^+ K^-$

LHCb 实验利用 9 fb⁻¹ 的质子 - 质子对撞数据，首次观测到 $B^0_s \to K_S^0 K^+ K^-$ 衰变，并改进了 $B^0_{(s)} \to K_S^0 h^+ h^{\prime -}$ 类无粲三体衰变的分支比测量结果。

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb + 1140 more2026-03-10⚛️ hep-ex

Current status of the light neutralino thermal dark matter in the phenomenological MSSM

本文详细论证了近期暗物质与对撞机实验结果对 phenomenological MSSM 中轻中性子热暗物质参数空间的强约束，探讨了轻 stau 的影响与非标准宇宙学效应，并提出了适用于 LHC Run-3 的基准点及基于 XGBOOST 的分析方案。

Rahool Kumar Barman, Genevieve Bélanger, Biplob Bhattacherjee + 2 more2026-03-06⚛️ hep-ph

A Method to Constrain Preferential Emission and Spectator Dynamics in Heavy-Ion Collisions

本文提出了一种利用旁观者与带电粒子前 - 后不对称性之间的 Pearson 关联作为实验探针，通过 AMPT 模型模拟验证了该方法能有效约束重离子碰撞中的优先发射效应及旁观者碎裂动力学，从而为理解末态纵向粒子分布机制提供了数据驱动的手段。

Vipul Bairathi, Somadutta Bhatta2026-03-06⚛️ hep-ph

The ABC of RPV II: Classification of R-parity Violating Signatures from UDD Couplings and their Coverage at the LHC

该论文利用 CheckMATE 2 框架系统研究了 R 宇称破缺 MSSM 中 UDD 耦合导致的重子数破坏算符，发现尽管胶子和右手中微子 LSP 的色荷扇区已得到良好覆盖，但电弱微子与超子 LSP 的 UDD 衰变信号在现有 ATLAS 和 CMS 搜索中仍存在显著覆盖空白。

Herbi K. Dreiner, Michael Hank, Yong Sheng Koay + 5 more2026-03-06⚛️ hep-ph

Long-lived Light Mediators in a Higgs Portal Model at the FCC-ee

本研究探讨了在 FCC-ee 的 IDEA 探测器上通过 Higgs 门户模型探测长寿命粒子的潜力，分析了 B 介子和 Higgs 玻色子衰变产生的信号及强子本底，并提出 DELIGHT B 等专用探测器配置能显著提升探测灵敏度。

Biplob Bhattacherjee, Camellia Bose, Herbi K. Dreiner + 3 more2026-03-06⚛️ hep-ph

Iterative HOMER with uncertainties

本文提出了 iHOMER 方法，通过迭代机制结合贝叶斯神经网络与不确定性感知回归，从实验数据中无偏地提取并量化了 Lund 碎裂函数的权重，从而准确复现数据分布并验证了其与真实碎裂函数的兼容性。

Anja Butter, Ayodele Ore, Sofia Palacios Schweitzer + 10 more2026-03-06⚛️ hep-ph

Constraints on new physics from decays of polarized $Λ_b^0$ baryons at the FCC-ee

本文基于 IDEA 探测器概念和 $6\times 10^{12} $个$ Z^0 $玻色子的模拟数据，展示了 FCC-ee 上利用极化$ \Lambda_b^0 $重子衰变进行角分析，能够通过引入极化可观测量显著改善对 Wilson 系数$ C_{9^{(\prime)}} $和$ C_{10^{(\prime)}}$ 的约束，从而为探索新物理提供独特机遇。

Anja Beck, Mero Elmarassy, Asher Sabbagh + 2 more2026-03-06🔬 physics

The BUTTON-30 detector at Boulby

本文介绍了位于布劳伯地下实验室 1.1 公里深处的 BUTTON-30 探测器，这是一个 30 吨级的技术验证装置，旨在通过同时利用切伦科夫光和闪烁光来评估混合事件探测技术在低本底地下环境中探测中微子相互作用粒子的潜力。

J. Bae, M. Bergevin, E. P. Bernard + 62 more2026-03-06🔬 physics

Characterization of the ionization response of argon to nuclear recoils at the keV scale with the ReD experiment

ReD 实验利用中子源在双相氩时间投影室中产生核反冲，首次以模型无关的方式在 2 至 10 keV 能区测量了氩的电离产额，填补了该能区实验数据的空白并发现低能端产额高于预期。

P. Agnes, I. Ahmad, S. Albergo + 42 more2026-03-06🔭 astro-ph

Measurements of differential charged-current cross sections on argon for electron neutrinos with final-state protons in MicroBooNE

MicroBooNE 合作组利用费米实验室主注入器中微子束流数据，首次测量了氩靶上电子中微子带电流相互作用（末态包含质子且无π介子）的微分截面，结果显示实验数据与主流中微子事件生成器的预测在误差范围内吻合良好。

MicroBooNE collaboration, P. Abratenko, D. Andrade Aldana + 178 more2026-03-06🔬 physics

hep-ex

An improved measurement of $η^\prime\rightarrow e^{+}e^{-}ω$

Search for long-lived charginos and $τ$ -sleptons using final states with a disappearing track in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

Search for decays of the Higgs boson into pair-produced pseudoscalar particles decaying into $τ^+τ^-τ^+τ^-$ using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

End-to-end optimisation of HEP triggers

Amplitude Analysis of Singly Cabibbo-Suppressed Decay $Λ^{+}_{c}\to p K^{+} K^{-}$

Improved branching-fraction measurements of $B^0_{(s)} \to K_S^0 h^+ h^{'-}$ decays and first observation of $B^0_(s) \to K_S^0 K^+ K^-$

Current status of the light neutralino thermal dark matter in the phenomenological MSSM

A Method to Constrain Preferential Emission and Spectator Dynamics in Heavy-Ion Collisions

The ABC of RPV II: Classification of R-parity Violating Signatures from UDD Couplings and their Coverage at the LHC

Long-lived Light Mediators in a Higgs Portal Model at the FCC-ee

Iterative HOMER with uncertainties

Constraints on new physics from decays of polarized $Λ_b^0$ baryons at the FCC-ee

The BUTTON-30 detector at Boulby

Characterization of the ionization response of argon to nuclear recoils at the keV scale with the ReD experiment

Measurements of differential charged-current cross sections on argon for electron neutrinos with final-state protons in MicroBooNE

First measurement of the strong interaction scattering parameters for the $\mathbf{K^-d}$ and $\mathbf{K^+d}$ systems

Measurement of the $e^+e^-\toπ^+π^-π^0$ cross section in the energy region from 0.56 to 1.1 GeV with the SND detector

Matter Unification and Lepton Flavour Violation

A baryon-calibrated unified quark-diquark effective mass formalism for heavy multiquarks

Covariant canonical-spinor amplitudes for partial wave analysis

hep-ex

An improved measurement of η′→e+e−ωη^\prime\rightarrow e^{+}e^{-}ωη′→e+e−ω

Search for long-lived charginos and τττ-sleptons using final states with a disappearing track in pppppp collisions at s=13\sqrt{s} = 13s​=13 TeV with the ATLAS detector

Search for decays of the Higgs boson into pair-produced pseudoscalar particles decaying into τ+τ−τ+τ−τ^+τ^-τ^+τ^-τ+τ−τ+τ− using pppppp collisions at s=13\sqrt{s}=13s​=13 TeV with the ATLAS detector

End-to-end optimisation of HEP triggers

Amplitude Analysis of Singly Cabibbo-Suppressed Decay Λc+→pK+K−Λ^{+}_{c}\to p K^{+} K^{-}Λc+​→pK+K−

Improved branching-fraction measurements of B(s)0→KS0h+h′−B^0_{(s)} \to K_S^0 h^+ h^{'-}B(s)0​→KS0​h+h′− decays and first observation of B(0s)→KS0K+K−B^0_(s) \to K_S^0 K^+ K^-B(0​s)→KS0​K+K−

Current status of the light neutralino thermal dark matter in the phenomenological MSSM

A Method to Constrain Preferential Emission and Spectator Dynamics in Heavy-Ion Collisions

The ABC of RPV II: Classification of R-parity Violating Signatures from UDD Couplings and their Coverage at the LHC

Long-lived Light Mediators in a Higgs Portal Model at the FCC-ee

Iterative HOMER with uncertainties

Constraints on new physics from decays of polarized Λb0Λ_b^0Λb0​ baryons at the FCC-ee

The BUTTON-30 detector at Boulby

Characterization of the ionization response of argon to nuclear recoils at the keV scale with the ReD experiment

Measurements of differential charged-current cross sections on argon for electron neutrinos with final-state protons in MicroBooNE

First measurement of the strong interaction scattering parameters for the K−d\mathbf{K^-d}K−d and K+d\mathbf{K^+d}K+d systems

Measurement of the e+e−→π+π−π0e^+e^-\toπ^+π^-π^0e+e−→π+π−π0 cross section in the energy region from 0.56 to 1.1 GeV with the SND detector

Matter Unification and Lepton Flavour Violation

A baryon-calibrated unified quark-diquark effective mass formalism for heavy multiquarks

Covariant canonical-spinor amplitudes for partial wave analysis

An improved measurement of $η^\prime\rightarrow e^{+}e^{-}ω$

Search for long-lived charginos and $τ$ -sleptons using final states with a disappearing track in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

Search for decays of the Higgs boson into pair-produced pseudoscalar particles decaying into $τ^+τ^-τ^+τ^-$ using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Amplitude Analysis of Singly Cabibbo-Suppressed Decay $Λ^{+}_{c}\to p K^{+} K^{-}$

Improved branching-fraction measurements of $B^0_{(s)} \to K_S^0 h^+ h^{'-}$ decays and first observation of $B^0_(s) \to K_S^0 K^+ K^-$

Constraints on new physics from decays of polarized $Λ_b^0$ baryons at the FCC-ee

First measurement of the strong interaction scattering parameters for the $\mathbf{K^-d}$ and $\mathbf{K^+d}$ systems

Measurement of the $e^+e^-\toπ^+π^-π^0$ cross section in the energy region from 0.56 to 1.1 GeV with the SND detector