Journal of High Energy Physics最新文献_第9页

Event generation with exponential scaling in multiplicity using AmpliCol 基于AmpliCol的多重指数缩放事件生成

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-04-23 DOI: 10.1007/JHEP04(2026)192

Rikkert Frederix, Timea Vitos

{"title":"Event generation with exponential scaling in multiplicity using AmpliCol","authors":"Rikkert Frederix, Timea Vitos","doi":"10.1007/JHEP04(2026)192","DOIUrl":"10.1007/JHEP04(2026)192","url":null,"abstract":"Efficient generation of LHC events is hindered by the rapidly rising cost of evaluating QCD matrix elements with increasing multiplicity. We build on a recently proposed two-step strategy in which unweighted events are first generated using the leading-colour (LC) approximation and then reweighted to full-colour (FC) accuracy, utilising the LC integration efficiency while recovering the exact FC prediction. In this work we extend the method to general Standard Model processes and present AmpliCol, a standalone implementation designed for LHC collisions. We benchmark multi-jet, ( toverline{t}+textrm{jets} ), ZZ+jets, and Drell-Yan+jets production, measuring the time required to obtain a fixed number of unweighted events at FC accuracy. Across all processes, the runtime exhibits a stable exponential scaling with multiplicity, far milder than the factorial growth of conventional matrix-element generators. This demonstrates that the AmpliCol code enables efficient event generation at multiplicities that are otherwise computationally prohibitive.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 4","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2026)192.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine Learning in the 2HDM2S model for Dark Matter 暗物质2HDM2S模型中的机器学习

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-04-23 DOI: 10.1007/JHEP04(2026)195

Rafael Boto, T. P. Rebelo, Jorge C. Romão, João P. Silva

引用次数: 0

Committing to bubbles: finding the critical configuration on the lattice 致力于气泡：找到晶格上的关键构型

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-04-23 DOI: 10.1007/JHEP04(2026)191

Tomasz P. Dutka

{"title":"Committing to bubbles: finding the critical configuration on the lattice","authors":"Tomasz P. Dutka","doi":"10.1007/JHEP04(2026)191","DOIUrl":"10.1007/JHEP04(2026)191","url":null,"abstract":"The nucleation of bubbles in first-order phase transitions is traditionally characterised by the critical bubble: defined as the saddle-point solution of the Euclidean action that separates collapsing from expanding field configurations. While this picture is exact in the noiseless, zero-temperature limit, thermal fluctuations introduces stochasticity which can influence the behaviour of the field configuration. In this work, we develop a purely statistical criterion for identifying the critical bubble by leveraging the concept of the “committor” probability: the likelihood that a given local field configuration evolves to the true vacuum before returning to the false vacuum. Using ensembles of lattice simulations with controlled thermal noise, we extract the committor probability during the evolution of a bubble from sub- to super-criticality. We find this approach to be robust, accounts for finite-temperature effects, and allows independent verification of bounce-based predictions. To demonstrate this, we compare the average profile obtained via the committor probability method to standard theory for a given model and find strong agreement, particularly at the core of the bubble. Importantly, we also observe that the behaviour of the committor probability with time is smooth and well defined. This method establishes a robust, simulation-driven framework for studying nucleation dynamics in thermal field theories and may be especially applicable in cases where analytical control might be limited.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 4","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2026)191.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A compact formula for conserved three-point tensor structures in 4D CFT 四维CFT中守恒三点张量结构的一个紧凑公式

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-04-23 DOI: 10.1007/JHEP04(2026)194

Paul Heslop, Hector Puerta-Ramisa

引用次数: 0

Classical spin transitions and absorptive scattering 经典自旋跃迁和吸收散射

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-04-23 DOI: 10.1007/JHEP04(2026)186

Juan Pablo Gatica, Callum R. T. Jones

{"title":"Classical spin transitions and absorptive scattering","authors":"Juan Pablo Gatica, Callum R. T. Jones","doi":"10.1007/JHEP04(2026)186","DOIUrl":"10.1007/JHEP04(2026)186","url":null,"abstract":"We describe an on-shell, amplitudes-based approach to incorporating radiation absorption effects in the post-Minkowskian scattering of generic, compact, spinning bodies. Classical spinning observables are recovered by extrapolating to large spin, results calculated with finite quantum spin-s particles using the properties of spin universality and Casimir interpolation. At leading-order our results give a completely general and non-redundant parametrization of absorptive observables in terms of a finite number of Wilson coefficients associated with 3-particle mass and spin-magnitude changing on-shell amplitudes. We denote these semi-fictitious microscopic processes: classical spin transitions. Explicit results for the leading-order impulse due to the absorption of scalar, electromagnetic and gravitational radiation, for spin transitions ∆s = 0, ±1, ±2 are given in a fully interpolated form up to ( mathcal{O}left({S}^2right) ), and Casimir independent contributions given up to ( mathcal{O}left({S}^4right) ). Our explicit results reveal some surprising universal patterns. We find that, up to identification of Wilson coefficients, the Casimir independent contributions to the impulse for spinning-up and spinning-down by the same magnitude |∆s| are identical. For processes where the quantum ∆s < 0 transition is forbidden, the corresponding classical observable is suppressed in powers of S by a predictable amount. Additionally we find that, while for generic non-aligned spin configurations there is a non-zero scattering angle at leading-order, for aligned spin, similar to non-spinning absorption, the scattering angle vanishes and the impulse is purely longitudinal. The formalism and results presented provide a significant extension of the amplitudes-based calculational pipeline for gravitational waveforms from binary black hole and neutron star systems beyond the point-particle approximation.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 4","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2026)186.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Supersymmetric AdS solitons, Coulomb branch flows and twisted compactifications 超对称AdS孤子、库仑分支流和扭曲紧化

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-04-23 DOI: 10.1007/JHEP04(2026)184

Dimitrios Chatzis, Madison Hammond, Georgios Itsios, Carlos Nunez, Dimitrios Zoakos

引用次数: 0

Thermal bootstrap of large-N matrix models via conic optimization 大n矩阵模型的二次优化热自举

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-04-23 DOI: 10.1007/JHEP04(2026)193

Sophia M. Adams

引用次数: 0

Gaussian processes for inferring parton distributions 推断部子分布的高斯过程

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-04-23 DOI: 10.1007/JHEP04(2026)182

Yamil Cahuana Medrano, Hervé Dutrieux, Joseph Karpie, Kostas Orginos, Savvas Zafeiropoulos, on behalf of the HadStruc Collaboration

引用次数: 0

Neural fake factor estimation using data-based inference 基于数据推理的神经假因子估计

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-04-23 DOI: 10.1007/JHEP04(2026)188

Jan Gavranovič, Lara Čalić, Jernej Debevc, Else Lytken, Borut Paul Kerševan

{"title":"Neural fake factor estimation using data-based inference","authors":"Jan Gavranovič, Lara Čalić, Jernej Debevc, Else Lytken, Borut Paul Kerševan","doi":"10.1007/JHEP04(2026)188","DOIUrl":"10.1007/JHEP04(2026)188","url":null,"abstract":"In a high-energy physics data analysis, the term “fake” backgrounds refers to events that would formally not satisfy the (signal) process selection criteria, but are accepted nonetheless due to mis-reconstructed particles. This can occur, e.g., when leptons from secondary decays are incorrectly identified as originating from the hard-scatter interaction point (known as non-prompt leptons), or when other physics objects, such as hadronic jets, are mistakenly reconstructed as leptons (resulting in mis-identified leptons). These fake leptons are usually estimated using data-driven techniques, one of the most common being the Fake Factor method. This method relies on predicting the fake lepton contribution by reweighting data events, using a scale factor (i.e. fake factor) function. Traditionally, fake factors have been estimated by histogramming and computing the ratio of two data distributions, typically as functions of a few relevant physics variables such as the transverse momentum pT and pseudorapidity η. In this work, we introduce a novel approach of fake factor calculation, based on density ratio estimation using neural networks trained directly on data in a higher-dimensional feature space. We show that our method enables the computation of a continuous, unbinned fake factor on a per-event basis, offering a more flexible, precise, and higher-dimensional alternative to the conventional method, making it applicable to a wide range of analyses. A simple LHC open data analysis we implemented confirms the feasibility of the method and demonstrates that the ML-based fake factor provides smoother, more stable estimates across the phase space than traditional methods, reducing binning artifacts and improving extrapolation to signal regions.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 4","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2026)188.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147738704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Constraining hot and cold nuclear matter properties from heavy-ion collisions and deep-inelastic scattering 从重离子碰撞和深度非弹性散射中约束热和冷核物质的性质

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-04-23 DOI: 10.1007/JHEP04(2026)185

Anton Andronic, Nicolas Borghini, Xiaojian Du, Christian Klein-Bösing, Renata Krupczak, Hendrik Roch, Sören Schlichting

引用次数: 0