{"title":"Consistency between bulk and boundary causalities in asymptotically anti-de Sitter spacetimes","authors":"Lei Fu, Keisuke Izumi, Daisuke Yoshida","doi":"10.1007/JHEP10(2025)184","DOIUrl":"10.1007/JHEP10(2025)184","url":null,"abstract":"<p>We investigate the consistency between bulk and boundary causalities in static, spherically symmetric, asymptotically anti-de Sitter (AdS) spacetimes. We derive a general formula that provides sufficient conditions for time advance, where bulk propagation arrives earlier than any boundary propagation. As an application, we show that in Reissner-Nordström-anti de Sitter spacetime, no geodesic satisfies the sufficient conditions for time advance even in the super-extremal case. Furthermore, we demonstrate that the Einstein-Euler-Heisenberg theory exhibits time advance when one or a linear combination of the coupling constants is positive and below an upper bound determined by the AdS length scale.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 10","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2025)184.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352371","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}
{"title":"Two approaches to the holomorphic modular bootstrap","authors":"Suresh Govindarajan, Jagannath Santara","doi":"10.1007/JHEP10(2025)181","DOIUrl":"10.1007/JHEP10(2025)181","url":null,"abstract":"<p>The holomorphic bootstrap attempts to classify rational conformal field theories. The straight ahead approach is hard to implement when the number of characters become large. We combine all characters of an RCFT to form a vector valued modular form with multiplier. Using known results from the theory of vector valued modular forms, given a known RCFT, we obtain new vector valued modular forms that share the same multiplier as the original RCFT. By taking particular linear combinations of the new solutions, we look for and find new admissible solutions. In the well-studied two character case, we reproduce all known admissible solutions with Wronskian indices 6 and 8. The method is illustrated with examples with up to six characters. The method using vector valued modular forms thus provides a new approach to the holomorphic modular bootstrap.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 10","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2025)181.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352716","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}
{"title":"Mass-deformed super Yang-Mills theory on ( {mathbbm{T}}^4 ): sum over twisted sectors, θ-angle, and CP violation","authors":"Mohamed M. Anber, Erich Poppitz","doi":"10.1007/JHEP10(2025)182","DOIUrl":"10.1007/JHEP10(2025)182","url":null,"abstract":"<p>We study SU(<i>N</i>) super Yang-Mills theory with a small gaugino mass <i>m</i> and vacuum angle <i>θ</i> on the four-torus <span>( {mathbbm{T}}^4 )</span> with ’t Hooft twisted boundary conditions. Introducing a detuning parameter ∆, which measures the deviation from an exactly self-dual <span>( {mathbbm{T}}^4 )</span>, and working in the limits <i>mLN</i> ≪ Λ<i>LN</i> ≪ 1 and <span>( frac{left(N-1right){m}^2{L}^2}{4pi}ll Delta ll 1 )</span>, where <i>L</i> is the torus size and Λ the strong-coupling scale, we compute the scalar and pseudo-scalar condensates to leading order in <i>m</i><sup>2</sup><i>L</i><sup>2</sup>/∆. The twists generate fractional-charge instantons, and we show that summing over all such contributions is crucial for reproducing the correct physical observables in the decompactified strong-coupling regime. From a Hamiltonian perspective, the sum over twisted sectors, already at small torus size, projects in the <i>m</i> = 0 limit onto a definite superselection sector of the <i>ℝ</i><sup>4</sup> theory. In the massless limit, we recover the exact value of the gaugino condensate |〈<i>λλ</i>〉| = 16<i>π</i><sup>2</sup>Λ<sup>3</sup>, and demonstrate how a spurious U(1) symmetry eliminates all <span>( mathcal{CP} )</span>-violating effects. Our results are directly testable in lattice simulations, and our method extends naturally to non-supersymmetric gauge theories.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 10","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2025)182.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352714","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}
Fernando Arias-Aragón, Giovanni Grilli di Cortona, Enrico Nardi
{"title":"Unveiling atomic electron motion effects in e+e− high energy collisions at NA64","authors":"Fernando Arias-Aragón, Giovanni Grilli di Cortona, Enrico Nardi","doi":"10.1007/JHEP10(2025)174","DOIUrl":"10.1007/JHEP10(2025)174","url":null,"abstract":"<p>Atomic electron motion is responsible for well-studied effects observed in low-energy (MeV-scale) processes. Recently, interest in this phenomenon has also emerged within the high-energy physics community, due to its potential to increase significantly the center-of-mass energy in fixed-target experiments. However, direct experimental evidence of this effect in high energy collisions has yet to be observed. We argue that a striking manifestation of atomic electron momenta could be revealed by the NA64 experiment at CERN during the proposed run with a 40 GeV positron beam. At this energy, <i>μ</i><sup>+</sup><i>μ</i><sup>−</sup> production via positron annihilation on electrons at rest is kinematically forbidden. The detection of <i>μ</i><sup>+</sup><i>μ</i><sup>−</sup> pairs from the annihilation channel would thus constitute direct evidence of an increase in the center-of-mass energy resulting from atomic electron motion. We also investigate the expected signatures for the proposed 60 GeV run, as well as for the data already collected at 70 GeV. Intriguingly, in both these cases, the predicted number of <i>μ</i><sup>+</sup><i>μ</i><sup>−</sup> pairs from positron annihilation is reduced compared to the electron-at-rest approximation.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 10","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2025)174.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352372","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}
{"title":"Massless monopole-string-domain wall fermions and polyhedral vacuum fermions","authors":"Minoru Eto, Yuito Suzuki","doi":"10.1007/JHEP10(2025)167","DOIUrl":"10.1007/JHEP10(2025)167","url":null,"abstract":"<p>Fermion zero modes of Bogomol’nyi-Prasad-Sommerfield monopole-string-domain wall composites in three spatial dimensions are studied. We analytically solve the Dirac equation and prove the existence of one fermion zero mode. Depending on mass parameters of bosons/fermions in the model, the zero modes are localized either on the monopoles, strings or domain walls, which we call monopole-string-domain wall fermions. We also show that in special cases, the zero modes can be confined within a finite vacuum region in the shape of an arbitrary convex polyhedron, which we call the polyhedral vacuum fermions. Furthermore, we show that fermionic superconducting currents do not generally flow on the host solitons except for the cases that the soliton network consists only of strings and domain walls and has translational symmetry about a spatial axis.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 10","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2025)167.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352368","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}
{"title":"The mass of the lightest gluelump","authors":"Cesar Ayala, Antonio Pineda","doi":"10.1007/JHEP10(2025)176","DOIUrl":"10.1007/JHEP10(2025)176","url":null,"abstract":"<p>We consider QCD with <i>n</i><sub><i>f</i></sub> = 0 and <i>n</i><sub><i>f</i></sub> = 3 light quarks. We present the most up-to-date determinations for the normalizations of the leading renormalons of the pole mass, the singlet static potential, the octet static potential, and the gluelump energy. These read <span>( {Z}_m^{overline{textrm{MS}}} )</span> = <span>( -{Z}_{V_s}^{overline{textrm{MS}}}/2 )</span> = {0.604(17), 0.551(20)}, <span>( {Z}_{V_o}^{overline{textrm{MS}}} )</span> = {0.136(8), 0.121(13)}, and <span>( {Z}_A^{overline{textrm{MS}}} )</span> = {–1.343(36), –1.224(43)}, for <i>n</i><sub><i>f</i></sub> = 0 and <i>n</i><sub><i>f</i></sub> = 3, respectively. For <i>n</i><sub><i>f</i></sub> = 0, we obtain two independent renormalization group invariant and renormalization scale independent determinations of the energy of the ground state gluelump in the principal value summation scheme: <span>( {Lambda}_B^{textrm{PV}}=2.47(9){r}_0^{-1} )</span> and <span>( {Lambda}_B^{textrm{PV}}=2.38(11){r}_0^{-1} )</span> where <span>( {r}_0^{-1} )</span> ≈ 400 MeV. Averaging these results, we obtain <span>( {Lambda}_B^{textrm{PV}}=2.44(7){r}_0^{-1} )</span>.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 10","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2025)176.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352373","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}
Luca V. Delacrétaz, Subham Dutta Chowdhury, Umang Mehta
{"title":"Symmetry and causality constraints on Fermi liquids","authors":"Luca V. Delacrétaz, Subham Dutta Chowdhury, Umang Mehta","doi":"10.1007/JHEP10(2025)171","DOIUrl":"10.1007/JHEP10(2025)171","url":null,"abstract":"<p>We investigate symmetry and causality constraints on interacting Fermi liquids. Whereas Galilean or Lorentz boost symmetry leads to a well-known constraint on the first Landau parameter <i>F</i><sub>1</sub>, we show that scale invariance similarly constrains <i>F</i><sub>0</sub>. In the case of conformal Fermi liquids, we show that causality constraints on the particle-hole continuum and on zero sound strongly restrict the available parameter space for interacting Fermi liquids. We also consider nonlinear response, which we show is sensitive to additional “generalized Landau parameters” even at lowest orders in the long wavelength limit. We impose Galilean, Lorentz and scale symmetry on these generalized Landau parameters, obtaining further nonlinear constraints. We test our constraints in several microscopic models that enter a Fermi liquid phase.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 10","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2025)171.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352374","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}
{"title":"Nonperturbative quantum gravity in a closed Lorentzian universe","authors":"Yasunori Nomura, Tomonori Ugajin","doi":"10.1007/JHEP10(2025)166","DOIUrl":"10.1007/JHEP10(2025)166","url":null,"abstract":"<p>We study how meaningful physical predictions can arise in nonperturbative quantum gravity in a closed Lorentzian universe. In such settings, recent developments suggest that the quantum gravitational Hilbert space is one-dimensional and real for each <i>α</i>-sector, as induced by spacetime wormholes. This appears to obstruct the conventional quantum-mechanical prescription of assigning probabilities via projection onto a basis of states. While previous approaches have introduced external observers or augmented the theory to resolve this issue, we argue that quantum gravity itself contains all the necessary ingredients to make physical predictions. We demonstrate that the emergence of classical observables and probabilistic outcomes can be understood as a consequence of partial observability: physical observers access only a subsystem of the universe. Tracing out the inaccessible degrees of freedom yields reduced density matrices that encode classical information, with uncertainties exponentially suppressed by the environment’s entropy. We develop this perspective using both the Lorentzian path integral and operator formalisms and support it with a simple microscopic model. Our results show that quantum gravity in a closed universe naturally gives rise to meaningful, robust predictions without recourse to external constructs.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 10","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2025)166.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352377","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}
{"title":"Thermal scalar field stress tensor on a two dimensional black hole and its near horizon properties","authors":"Saurav Samanta, Bibhas Ranjan Majhi","doi":"10.1007/JHEP10(2025)183","DOIUrl":"10.1007/JHEP10(2025)183","url":null,"abstract":"<p>We calculate the thermal renormalized energy-momentum tensor components of a massless scalar field, leading to trace anomaly, on a (1 + 1) dimensional static black hole spacetime. Using these, the energy density and flux, seen by both static and freely-falling observers, are evaluated. Interestingly for both these observers the aforementioned quantities in the thermal version of Unruh and Boulware states are finite at the horizon when the scalar field is in thermal equilibrium with the horizon temperature (given by the Hawking expression). Whereas in Hartle-Hawking thermal state both the observers see finite energy-density and flux at the horizon, irrespective of the value of field temperature. Particularly in the case of Schwarzschild spacetime a freely falling observer, starts with initial zero velocity, finds its initial critical position <span>( {r}_i^c )</span> = (3/2)<i>r</i><sub><i>H</i></sub>, where <i>r</i><sub><i>H</i></sub> is the horizon radius for which energy-density vanishes.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 10","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2025)183.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145352709","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}
Paweł Horodecki, Kazuki Sakurai, Abhyoudai S. Shaleena, Michael Spannowsky
{"title":"Three-body non-locality in particle decays","authors":"Paweł Horodecki, Kazuki Sakurai, Abhyoudai S. Shaleena, Michael Spannowsky","doi":"10.1007/JHEP10(2025)160","DOIUrl":"10.1007/JHEP10(2025)160","url":null,"abstract":"<p>The exploration of entanglement and Bell non-locality among multi-particle quantum systems offers a profound avenue for testing and understanding the limits of quantum mechanics and local real hidden variable theories. In this work, we examine non-local correlations among three massless spin-1/2 particles generated from the three-body decay of a massive particle, utilizing a framework based on general four-fermion interactions. By analyzing several inequalities, we address the detection of deviations from quantum mechanics as well as violations of two key hidden variable theories: fully local-real and bipartite local-real theories. Our approach encompasses the standard Mermin inequality and the tight 4 × 4 × 2 inequality, providing a comprehensive framework for probing three-partite non-local correlations. Our findings provide deeper insights into the boundaries of classical and quantum theories in three-particle systems, advancing the understanding of non-locality in particle decays and its relevance to particle physics and quantum foundations.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 10","pages":""},"PeriodicalIF":5.5,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP10(2025)160.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316516","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}