Journal of High Energy Physics最新文献_第5页

Radiative neutrino masses from dim-7 SMEFT: a simplified multi-scale approach 来自dim-7 SMEFT的辐射中微子质量：一个简化的多尺度方法

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-09-05 DOI: 10.1007/JHEP09(2025)050

Kåre Fridell, Lukáš Gráf, Julia Harz, Chandan Hati

{"title":"Radiative neutrino masses from dim-7 SMEFT: a simplified multi-scale approach","authors":"Kåre Fridell, Lukáš Gráf, Julia Harz, Chandan Hati","doi":"10.1007/JHEP09(2025)050","DOIUrl":"10.1007/JHEP09(2025)050","url":null,"abstract":"Lepton-number-violating interactions occur in the Standard Model Effective Field Theory (SMEFT) at odd dimensions starting from the dimension-5 Weinberg operator. Although the operators at dimension-7 and higher are more suppressed by the heavy new scale, they can be crucial when traditional seesaw mechanisms leading to tree-level dimension-5 contributions are absent. We identify all minimal tree-level UV-completions for dimension-7 ∆L = 2 SMEFT operators without covariant derivatives and propose a new simplified approach for estimating the radiative neutrino masses arising from such operators. This dimensional-regularisation-based approach provides a more accurate estimate for the loop neutrino masses when the new physics fields are hierarchical in mass, as compared to the cut-off-regularisation-based approach often employed in the literature. This allows us to identify viable regions of parameter space in the full list of relevant simplified models close to the current limits set by neutrinoless double beta decay and the LHC that would previously have been thought to be excluded by neutrino-mass constraints.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 9","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP09(2025)050.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144998515","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

Small instantons and the post-inflationary QCD axion in a special product GUT 特殊产品GUT中的小瞬子和后暴胀QCD轴子

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-09-04 DOI: 10.1007/JHEP09(2025)047

Shihwen Hor, Yuichiro Nakai, Motoo Suzuki, Junxuan Xu

{"title":"Small instantons and the post-inflationary QCD axion in a special product GUT","authors":"Shihwen Hor, Yuichiro Nakai, Motoo Suzuki, Junxuan Xu","doi":"10.1007/JHEP09(2025)047","DOIUrl":"10.1007/JHEP09(2025)047","url":null,"abstract":"We present a new framework of grand unification that is equipped with an axion solution to the strong CP problem without a domain wall problem when the Peccei-Quinn (PQ) symmetry is spontaneously broken after inflation. Our grand unified theory (GUT) is based on a symmetry breaking pattern, SU(10) × SU(5)1 → SU(5)V ⊃ SU(3)C × SU(2)L × U(1)Y, where SU(5)1 and a special embedding of SU(5)2 ⊂ SU(10) are broken to a diagonal subgroup SU(5)V. The model contains a vector-like pair of PQ-charged fermions that transform as (anti-)fundamental representations under SU(10), so that the domain wall number is one. However, after the GUT symmetry breaking, the number of vector-like pairs of PQ-charged colored fermions is larger than one, which seems to encounter the domain wall problem. This apparent inconsistency is resolved by small instanton effects on the axion potential which operate as a PQ-violating bias term and allow the decay of domain walls. We propose a domain-wall-free UV completion for an IR model where the domain wall number appears larger than one. The model gives a prediction for a dark matter axion window, which is different from that of the ordinary post-inflationary QCD axion with domain wall number one.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 9","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP09(2025)047.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990374","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

The influence of Wilson lines on heavy quark anti-quark potential and mass 威尔逊谱线对重夸克反夸克势和质量的影响

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-09-04 DOI: 10.1007/JHEP09(2025)046

Bing Chen, Xun Chen, Mitsutoshi Fujita, Jun Zhang

引用次数: 0

Topological observables and θ dependence in high temperature QCD from lattice simulations 晶格模拟高温QCD的拓扑观测值和θ依赖关系

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-09-04 DOI: 10.1007/JHEP09(2025)045

A. Yu. Kotov, M. P. Lombardo, A. Trunin

引用次数: 0

CP violation at finite temperature 有限温度下的CP破坏

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-09-03 DOI: 10.1007/JHEP09(2025)034

Károly Seller, Zsolt Szép, Zoltán Trócsányi

引用次数: 0

Quasinormal modes and complexity in saddle-dominated SU(N) spin systems 鞍型SU(N)自旋系统的拟正态模和复杂性

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-09-03 DOI: 10.1007/JHEP09(2025)039

Sergio E. Aguilar-Gutierrez, Yichao Fu, Kuntal Pal, Klaas Parmentier

{"title":"Quasinormal modes and complexity in saddle-dominated SU(N) spin systems","authors":"Sergio E. Aguilar-Gutierrez, Yichao Fu, Kuntal Pal, Klaas Parmentier","doi":"10.1007/JHEP09(2025)039","DOIUrl":"10.1007/JHEP09(2025)039","url":null,"abstract":"We study SU(N) spin systems that mimic the behavior of particles in N-dimensional de Sitter space for N = 2, 3. Their Hamiltonians describe a dynamical system with hyperbolic fixed points, leading to emergent quasinormal modes at the quantum level. These manifest as quasiparticle peaks in the density of states. For a particle in 2-dimensional de Sitter, we find both principal and complementary series densities of states from a PT-symmetric version of the Lipkin-Meshkov-Glick model, having two hyperbolic fixed points in the classical phase space. We then study different spectral and dynamical properties of this class of models, including level spacing statistics, two-point functions, squared commutators, spectral form factor, Krylov operator and state complexity. We find that, even though the early-time properties of these quantities are governed by the saddle points — thereby in some cases mimicking corresponding properties of chaotic systems, a close look at the late-time behavior reveals the integrable nature of the system.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 9","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP09(2025)039.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144934592","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

Differential equations for tree-level cosmological correlators with massive states 具有大质量态的树级宇宙学相关器的微分方程

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-09-03 DOI: 10.1007/JHEP09(2025)043

Federico Gasparotto, Pouria Mazloumi, Xiaofeng Xu

引用次数: 0

Properties of scalar partition functions of 2d CFTs 二维cft标量配分函数的性质

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-09-03 DOI: 10.1007/JHEP09(2025)042

Nathan Benjamin, Cyuan-Han Chang, A. Liam Fitzpatrick, Tobi Ramella

引用次数: 0

The central emission vertex of two gravitons 两个重子的中心发射顶点

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-09-03 DOI: 10.1007/JHEP09(2025)041

Damiano Barcaro, Vittorio Del Duca

引用次数: 0

Production of dark photons through higher electromagnetic moments at LDMX: simulations and model discrimination LDMX高电磁矩下暗光子的产生：模拟和模型判别

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2025-09-03 DOI: 10.1007/JHEP09(2025)040

Riccardo Catena, Taylor R. Gray, Thomas Jerkvall

{"title":"Production of dark photons through higher electromagnetic moments at LDMX: simulations and model discrimination","authors":"Riccardo Catena, Taylor R. Gray, Thomas Jerkvall","doi":"10.1007/JHEP09(2025)040","DOIUrl":"10.1007/JHEP09(2025)040","url":null,"abstract":"We extend the projected sensitivity of LDMX for sub-GeV dark matter (DM) to the case of dark photons produced through higher order electromagnetic moments. These moments arise from loop diagrams involving portal matter fields, along with the gauge fields of new symmetry groups. Due to the Lorentz structures, in particular the momentum dependence, of these additional interactions, the kinematic distributions expected at missing momentum/energy experiments vary with model in addition to dark photon mass. By considering four additional types of interactions — magnetic and electric dipole, charge radius, and anapole moment — we show that LDMX Phase-II is expected to probe the relic target of these additional dark photon models. We compare the analytic with the numerical methods for calculating the dark bremsstrahlung cross section, and compute the kinematic distributions for each model. The potential for model discrimination in the scenario of non-zero signal events at LDMX is discussed. We find that there is a degeneracy between the dark photon mass and model, which can be partially broken by considering both the energy and the transverse momentum of the recoil electron.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 9","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP09(2025)040.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144934594","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