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

On cosmological singularities in string theory 论弦理论中的宇宙奇点

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-08-25 DOI: 10.1007/JHEP08(2026)195

Jinwei Chu, David Kutasov

引用次数: 0

An all-loop amplituhedron in two dimensions 二维全环幅面体

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-08-25 DOI: 10.1007/JHEP08(2026)198

Jonah Stalknecht

{"title":"An all-loop amplituhedron in two dimensions","authors":"Jonah Stalknecht","doi":"10.1007/JHEP08(2026)198","DOIUrl":"10.1007/JHEP08(2026)198","url":null,"abstract":"We define and study a positive geometry ∆(L) which serves as a natural generalization of loop amplituhedra to two-dimensional Minkowski space ℝ1,1. The geometry is formulated in the framework of lightcone geometries in dual momentum space, and can equivalently be obtained as a specific boundary of the L-loop amplituhedron for 𝒩 = 4 super Yang-Mills. The simplicity of the two-dimensional setting allows us to calculate the canonical form of ∆(L) at any loop order, which is shown to correspond to massless banana graphs. We integrate the canonical form at all loop orders in dimensional regularization, and find that the full IR divergence structure at L-loops is captured by the Lth power of the one-loop result, a phenomenon analogous to IR exponentiation. Furthermore, these integrated functions can be resummed into a closed-form non-perturbative result given by a Fox-Wright function. In the limit where L → ∞, the geometry gives rise to a path integral over worldlines, suggesting the emergence of a dual description at strong coupling. This construction provides a simple and tractable setting in which to explore the geometry of loop amplitudes, and offers a controlled toy model for investigating loop amplituhedra beyond their standard scope.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 8","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP08(2026)198.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837865","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

Chiral holography 手性全息术

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-08-25 DOI: 10.1007/JHEP08(2026)202

Atul Sharma, David Skinner

引用次数: 0

Constraining and resolving Lorentz-Violating new physics at ESSnuSB using complementarity with DUNE 利用DUNE的互补约束和解决ESSnuSB的违反洛伦兹的新物理

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-08-25 DOI: 10.1007/JHEP08(2026)200

Himanshu Bora, Debajyoti Dutta, Abinash Medhi

{"title":"Constraining and resolving Lorentz-Violating new physics at ESSnuSB using complementarity with DUNE","authors":"Himanshu Bora, Debajyoti Dutta, Abinash Medhi","doi":"10.1007/JHEP08(2026)200","DOIUrl":"10.1007/JHEP08(2026)200","url":null,"abstract":"We examine the sensitivity of the ESSnuSB and DUNE long-baseline neutrino experiments to isotropic, CPT-violating Lorentz Invariance Violation (LIV). Using detailed simulations for the 360 km and 540 km ESSnuSB baselines and the 1300 km DUNE setup, we assess how LIV parameters influence oscillation probabilities, event spectra, and degeneracies among oscillation parameters. We find that LIV-induced modifications can closely mimic variations in θ23 and δCP, potentially leading to incorrect determination of the atmospheric mixing angle octant and the leptonic CP phase if LIV effects are not accounted for. Although combining the two ESSnuSB baselines improves overall sensitivity, it does not fully remove these degeneracies. In contrast, a joint ESSnuSB+DUNE analysis benefiting from the synergy between second-maximum sensitivity at ESSnuSB and first-maximum, matter-enhanced sensitivity at DUNE can successfully resolve all these degeneracies and can yield significantly stronger constraints on all the LIV parameters. The results presented here highlight the essential role of multi-baseline, multi-energy experimental strategies to probe Planck-suppressed Lorentz-violating new physics.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 8","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP08(2026)200.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837867","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 effects of a scalar singlet leptoquark at the Z factory 纯量单重态轻夸克在Z工厂的效应

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-08-25 DOI: 10.1007/JHEP08(2026)199

Dazhuang He, Yu Zhang, Hao Sun

{"title":"The effects of a scalar singlet leptoquark at the Z factory","authors":"Dazhuang He, Yu Zhang, Hao Sun","doi":"10.1007/JHEP08(2026)199","DOIUrl":"10.1007/JHEP08(2026)199","url":null,"abstract":"We evaluate the observability of the effects of a scalar singlet leptoquark (LQ) in μ and τ-pair productions at the Z factory. In the scenario addressing the charged-current anomalies, the LQ contributions to μ-pair final state are negligible. In contrast, a sizable contribution arises in the τ-pair production, which is identical in both Z decay and e+e− collider at Z pole. These effects are mainly sensitive to left-handed interaction, showing a maximum deviation of about −0.7% for both 1 TeV and 2 TeV LQ. The suppression of new physics effects from the heavy LQ can be compensated by the enlarged couplings parameter space. For the τ-pair production channel, we further specify the coupling constraints corresponding to the expected measurement precision at the future Z factory. Moreover, we provide an analytic function in terms of the LQ mass and couplings to quantify the LQ effects. The differential distributions in the collision process indicate that the LQ effects remain stable throughout the kinematic region. Meanwhile, the measurement sensitivity of the τ-pair final state at the future Z factory is expected to impose further constraints on the LQ theory.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 8","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP08(2026)199.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837922","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

Non-factorisable electroweak virtual corrections to single-resonant processes 单共振过程的不可因式电弱虚修正

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-08-25 DOI: 10.1007/JHEP08(2026)196

Fazila Ahmadova, Luca Buonocore, Massimiliano Grazzini, Chiara Savoini

{"title":"Non-factorisable electroweak virtual corrections to single-resonant processes","authors":"Fazila Ahmadova, Luca Buonocore, Massimiliano Grazzini, Chiara Savoini","doi":"10.1007/JHEP08(2026)196","DOIUrl":"10.1007/JHEP08(2026)196","url":null,"abstract":"We consider electroweak (EW) virtual corrections to 2 → 2 fermion scattering processes mediated by a vector boson V(V = W±, Z) in the pole approximation. As is well known, the computation can be organised into factorisable and non-factorisable contributions. The factorisable corrections can be computed by evaluating the (polarised) EW form factor of the vector boson at the relevant perturbative order. The non-factorisable corrections are instead driven by soft-photon exchanges between the initial- and final-state fermions and/or the resonance. We perform an explicit two-loop computation to show that, once the heavy degrees of freedom are properly decoupled, such non-factorisable corrections can be expressed as an iteration of the one-loop result, plus a new contribution due to (light) fermion loops. The final two-loop result, which can be expected on general grounds from soft-photon factorisation, is shown to hold exactly in dimensional regularisation and is peculiar to the exchange of a single resonance. We discuss its extension to all perturbative orders.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 8","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP08(2026)196.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837923","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 and resolving Lorentz-Violating new physics at ESSnuSB using complementarity with DUNE 利用DUNE的互补约束和解决ESSnuSB的违反洛伦兹的新物理

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-08-25 DOI: 10.1007/JHEP08(2026)200

Himanshu Bora, Debajyoti Dutta, Abinash Medhi

{"title":"Constraining and resolving Lorentz-Violating new physics at ESSnuSB using complementarity with DUNE","authors":"Himanshu Bora, Debajyoti Dutta, Abinash Medhi","doi":"10.1007/JHEP08(2026)200","DOIUrl":"10.1007/JHEP08(2026)200","url":null,"abstract":"We examine the sensitivity of the ESSnuSB and DUNE long-baseline neutrino experiments to isotropic, CPT-violating Lorentz Invariance Violation (LIV). Using detailed simulations for the 360 km and 540 km ESSnuSB baselines and the 1300 km DUNE setup, we assess how LIV parameters influence oscillation probabilities, event spectra, and degeneracies among oscillation parameters. We find that LIV-induced modifications can closely mimic variations in θ23 and δCP, potentially leading to incorrect determination of the atmospheric mixing angle octant and the leptonic CP phase if LIV effects are not accounted for. Although combining the two ESSnuSB baselines improves overall sensitivity, it does not fully remove these degeneracies. In contrast, a joint ESSnuSB+DUNE analysis benefiting from the synergy between second-maximum sensitivity at ESSnuSB and first-maximum, matter-enhanced sensitivity at DUNE can successfully resolve all these degeneracies and can yield significantly stronger constraints on all the LIV parameters. The results presented here highlight the essential role of multi-baseline, multi-energy experimental strategies to probe Planck-suppressed Lorentz-violating new physics.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 8","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP08(2026)200.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837930","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

Non-factorisable electroweak virtual corrections to single-resonant processes 单共振过程的不可因式电弱虚修正

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-08-25 DOI: 10.1007/JHEP08(2026)196

Fazila Ahmadova, Luca Buonocore, Massimiliano Grazzini, Chiara Savoini

{"title":"Non-factorisable electroweak virtual corrections to single-resonant processes","authors":"Fazila Ahmadova, Luca Buonocore, Massimiliano Grazzini, Chiara Savoini","doi":"10.1007/JHEP08(2026)196","DOIUrl":"10.1007/JHEP08(2026)196","url":null,"abstract":"We consider electroweak (EW) virtual corrections to 2 → 2 fermion scattering processes mediated by a vector boson V(V = W±, Z) in the pole approximation. As is well known, the computation can be organised into factorisable and non-factorisable contributions. The factorisable corrections can be computed by evaluating the (polarised) EW form factor of the vector boson at the relevant perturbative order. The non-factorisable corrections are instead driven by soft-photon exchanges between the initial- and final-state fermions and/or the resonance. We perform an explicit two-loop computation to show that, once the heavy degrees of freedom are properly decoupled, such non-factorisable corrections can be expressed as an iteration of the one-loop result, plus a new contribution due to (light) fermion loops. The final two-loop result, which can be expected on general grounds from soft-photon factorisation, is shown to hold exactly in dimensional regularisation and is peculiar to the exchange of a single resonance. We discuss its extension to all perturbative orders.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 8","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP08(2026)196.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837451","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

An all-loop amplituhedron in two dimensions 二维全环幅面体

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-08-25 DOI: 10.1007/JHEP08(2026)198

Jonah Stalknecht

{"title":"An all-loop amplituhedron in two dimensions","authors":"Jonah Stalknecht","doi":"10.1007/JHEP08(2026)198","DOIUrl":"10.1007/JHEP08(2026)198","url":null,"abstract":"We define and study a positive geometry ∆(L) which serves as a natural generalization of loop amplituhedra to two-dimensional Minkowski space ℝ1,1. The geometry is formulated in the framework of lightcone geometries in dual momentum space, and can equivalently be obtained as a specific boundary of the L-loop amplituhedron for 𝒩 = 4 super Yang-Mills. The simplicity of the two-dimensional setting allows us to calculate the canonical form of ∆(L) at any loop order, which is shown to correspond to massless banana graphs. We integrate the canonical form at all loop orders in dimensional regularization, and find that the full IR divergence structure at L-loops is captured by the Lth power of the one-loop result, a phenomenon analogous to IR exponentiation. Furthermore, these integrated functions can be resummed into a closed-form non-perturbative result given by a Fox-Wright function. In the limit where L → ∞, the geometry gives rise to a path integral over worldlines, suggesting the emergence of a dual description at strong coupling. This construction provides a simple and tractable setting in which to explore the geometry of loop amplitudes, and offers a controlled toy model for investigating loop amplituhedra beyond their standard scope.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 8","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP08(2026)198.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837444","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

Strong-coupling results in (non-)conformal 𝒩 = 2 theories with fundamental flavors 强耦合导致具有基本特征的（非）共形理论

IF 5.5 1区物理与天体物理

Journal of High Energy Physics Pub Date : 2026-08-25 DOI: 10.1007/JHEP08(2026)203

M. Billò, A. Lerda, A. Testa

{"title":"Strong-coupling results in (non-)conformal 𝒩 = 2 theories with fundamental flavors","authors":"M. Billò, A. Lerda, A. Testa","doi":"10.1007/JHEP08(2026)203","DOIUrl":"10.1007/JHEP08(2026)203","url":null,"abstract":"We study a class of four-dimensional 𝒩 = 2 SU(N) gauge theories with two massless hypermultiplets in the rank-two antisymmetric representation and 0 ≤ NF ≤ 4 fundamental flavors. These theories are superconformal for NF = 4 and asymptotically free otherwise. Supersymmetric localization on the four-sphere applies in both cases and leads to matrix-model representations for a broad class of protected observables. Within this framework, we compute the free energy and the expectation value of the ( frac{1}{2} )-BPS circular Wilson loop in the large-N limit. For any NF, we show that the infinite series of non-planar corrections at large ’t Hooft coupling λ can be resummed in terms of an effective coupling ( overset{sim }{lambda } ). In the non-conformal window (0 ≤ NF < 4), this provides a first example in which localization leads to explicit results in the planar limit at strong ’t Hooft coupling. In the superconformal case (NF = 4), the large-N expansion in ( overset{sim }{lambda } ) suggests a refined AdS/CFT dictionary in which ( overset{sim }{lambda } ), rather than λ, plays the role of the bulk string coupling.","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2026 8","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP08(2026)203.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148837920","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