Journal of High Energy Physics最新文献

{"title":"e+e− → ZH process in the SMEFT beyond leading order","authors":"Konstantin Asteriadis,&nbsp;Sally Dawson,&nbsp;Pier Paolo Giardino,&nbsp;Robert Szafron","doi":"10.1007/JHEP02(2025)162","DOIUrl":"10.1007/JHEP02(2025)162","url":null,"abstract":"<p>We systematically study potential effects of Beyond the Standard Model physics in the <i>e</i>⁺<i>e</i>⁻ → <i>ZH</i> process. To this end, we include all relevant dimension-6 Standard Model Effective Field Theory operators and work to next-to-leading order (NLO) accuracy in the electroweak coupling. We consider both polarized and unpolarized electron and positron beams and present results for <span>( sqrt{s} )</span> = 240, 365 and 500 GeV, emphasizing contributions where the NLO predictions differ significantly from the leading order results. At NLO, a sensitivity arises to operators that do not contribute at tree level, such as the Higgs tri-linear coupling, CP-violating operators, and dimension-6 operators involving the top quark, among many others. We compare the prospects of future <i>e</i>⁺<i>e</i>⁻ colliders to explore these new physics effects with existing measurements from the LHC, electron EDMs (for CP violating operators), and Z pole measurements.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 2","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP02(2025)162.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496858","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":"Erratum to: Inclusive semileptonic ( bto cell overline{nu} ) decays to order ( 1/{m}_b^5 )","authors":"Thomas Mannel,&nbsp;Ilija S. Milutin,&nbsp;K. Keri Vos","doi":"10.1007/JHEP02(2025)167","DOIUrl":"10.1007/JHEP02(2025)167","url":null,"abstract":"","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 2","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP02(2025)167.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489548","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":"Smooth extremal horizons are the exception, not the rule","authors":"Gary T. Horowitz,&nbsp;Jorge E. Santos","doi":"10.1007/JHEP02(2025)169","DOIUrl":"10.1007/JHEP02(2025)169","url":null,"abstract":"<p>We show that the general charged, rotating black hole in five-dimensional Einstein-Maxwell theory has a singular extremal limit. Only the known analytic solutions with exactly zero charge or zero angular momenta have smooth extremal horizons. We also consider general black holes in five-dimensional Einstein-Maxwell-Chern-Simons theory, and show that they also have singular extremal limits except for one special value of the coefficient of the Chern-Simons term (the one fixed by supergravity). Combining this with earlier results showing that extremal black holes have singular horizons in four-dimensional general relativity with small higher derivative corrections, and in anti-de Sitter space with perturbed boundary conditions, one sees that smooth extremal horizons are indeed the exception and not the rule.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 2","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP02(2025)169.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489558","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":"Probing low-reheating scenarios with minimal freeze-in dark matter","authors":"Nicolás Bernal,&nbsp;Chee Sheng Fong,&nbsp;Óscar Zapata","doi":"10.1007/JHEP02(2025)161","DOIUrl":"10.1007/JHEP02(2025)161","url":null,"abstract":"<p>The parameter space of freeze-in dark matter (DM) with mass <i>m</i>_<i>χ</i> through light dark photon (“minimal freeze-in DM”) is currently being probed by direct detection experiments through electron and nuclear recoil. Exploring the DM production in the mass range 10^<i>−</i>2 MeV &lt; <i>m</i>_<i>χ</i> &lt; 10³ TeV, we quantify the impact of quantum statistics and the reheating dynamics (beyond the instantaneous reheating approximation) on the DM production in the early universe, in particular, the dependence on the cosmic equation of state and the scaling of the temperature of the Standard Model bath during reheating. Special cases corresponding to matter-domination and kination are carefully studied. To fit the entire observed DM relic abundance, low-temperature reheating scenarios require an increase in the coupling between dark and visible sectors which, in turn, enhances the regions of the parameter space that are already tested and will be probed by next-generation direct detection experiments for diverse reheating scenarios.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 2","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP02(2025)161.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489551","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":"New physics at Tera-Z: precision renormalised","authors":"Lukas Allwicher,&nbsp;Matthew McCullough,&nbsp;Sophie Renner","doi":"10.1007/JHEP02(2025)164","DOIUrl":"10.1007/JHEP02(2025)164","url":null,"abstract":"<p>We study the power of a Tera-<i>Z</i> run at FCC-ee for indirectly detecting or constraining heavy new physics. Our main finding is that nearly every new particle which matches at tree level to dimension-six operators of the Standard Model Effective Field Theory (SMEFT) affects electroweak precision observables (EWPOs) at either tree level or via one loop renormalisation group (RG) running. This is true almost regardless of the structure of couplings to the Standard Model; just a handful of exceptions are identified which can produce zeroes in the EWPO RG equations. Under simple flavour assumptions, we perform fits of each state to projected FCC-ee <i>Z</i> pole measurements, showing that all scenarios can be tested at the TeV scale or better, with many projected exclusions reaching tens of TeV. Tera-<i>Z</i> is argued to provide an almost inescapable probe of heavy new physics.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 2","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP02(2025)164.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489549","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":"Where is tree-level string theory?","authors":"Jan Albert,&nbsp;Waltraut Knop,&nbsp;Leonardo Rastelli","doi":"10.1007/JHEP02(2025)157","DOIUrl":"10.1007/JHEP02(2025)157","url":null,"abstract":"<p>We investigate the space of consistent tree-level extensions of the maximal supergravities in ten dimensions. We parametrize theory space by the first few EFT coefficients and by the on-shell coupling of the lightest massive state, and impose on these data the constraints that follow from 2 → 2 supergraviton scattering. While Type II string theory lives strictly inside the allowed region, we uncover a novel extremal solution of the bootstrap problem, which appears to contain a <i>single</i> linear Regge trajectory, with the same slope as string theory. We repeat a similar analysis for supergluon scattering, where we find instead a continuous family of extremal solutions with a single Regge trajectory of varying slope.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 2","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP02(2025)157.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489356","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":"An accurate solar axions ray-tracing response of BabyIAXO","authors":"IAXO collaboration,&nbsp;S. Ahyoune,&nbsp;K. Altenmüller,&nbsp;I. Antolín,&nbsp;S. Basso,&nbsp;P. Brun,&nbsp;F. R. Candón,&nbsp;J. F. Castel,&nbsp;S. Cebrián,&nbsp;D. Chouhan,&nbsp;R. Della Ceca,&nbsp;M. Cervera-Cortés,&nbsp;V. Chernov,&nbsp;M. M. Civitani,&nbsp;C. Cogollos,&nbsp;E. Costa,&nbsp;V. Cotroneo,&nbsp;T. Dafní,&nbsp;A. Derbin,&nbsp;K. Desch,&nbsp;M. C. Díaz-Martín,&nbsp;A. Díaz-Morcillo,&nbsp;D. Díez-Ibáñez,&nbsp;C. Diez Pardos,&nbsp;M. Dinter,&nbsp;B. Döbrich,&nbsp;I. Drachnev,&nbsp;A. Dudarev,&nbsp;A. Ezquerro,&nbsp;S. Fabiani,&nbsp;E. Ferrer-Ribas,&nbsp;F. Finelli,&nbsp;I. Fleck,&nbsp;J. Galán,&nbsp;G. Galanti,&nbsp;M. Galaverni,&nbsp;J. A. García,&nbsp;J. M. García-Barceló,&nbsp;L. Gastaldo,&nbsp;M. Giannotti,&nbsp;A. Giganon,&nbsp;C. Goblin,&nbsp;N. Goyal,&nbsp;Y. Gu,&nbsp;L. Hagge,&nbsp;L. Helary,&nbsp;D. Hengstler,&nbsp;D. Heuchel,&nbsp;S. Hoof,&nbsp;R. Iglesias-Marzoa,&nbsp;F. J. Iguaz,&nbsp;C. Iñiguez,&nbsp;I. G. Irastorza,&nbsp;K. Jakovčić,&nbsp;D. Käfer,&nbsp;J. Kaminski,&nbsp;S. Karstensen,&nbsp;M. Law,&nbsp;A. Lindner,&nbsp;M. Loidl,&nbsp;C. Loiseau,&nbsp;G. López-Alegre,&nbsp;A. Lozano-Guerrero,&nbsp;B. Lubsandorzhiev,&nbsp;G. Luzón,&nbsp;I. Manthos,&nbsp;C. Margalejo,&nbsp;A. Marín-Franch,&nbsp;J. Marqués,&nbsp;F. Marutzky,&nbsp;C. Menneglier,&nbsp;M. Mentink,&nbsp;S. Mertens,&nbsp;J. Miralda-Escudé,&nbsp;H. Mirallas,&nbsp;F. Muleri,&nbsp;V. Muratova,&nbsp;J. R. Navarro-Madrid,&nbsp;X. F. Navick,&nbsp;K. Nikolopoulos,&nbsp;A. Notari,&nbsp;A. Nozik,&nbsp;L. Obis,&nbsp;A. Ortiz-de-Solórzano,&nbsp;T. O’Shea,&nbsp;J. von Oy,&nbsp;G. Pareschi,&nbsp;T. Papaevangelou,&nbsp;G. Pareschi,&nbsp;K. Perez,&nbsp;O. Pérez,&nbsp;E. Picatoste,&nbsp;M. J. Pivovaroff,&nbsp;J. Porrón,&nbsp;M. J. Puyuelo,&nbsp;A. Quintana,&nbsp;J. Redondo,&nbsp;D. Reuther,&nbsp;A. Ringwald,&nbsp;M. Rodrigues,&nbsp;A. Rubini,&nbsp;S. Rueda-Teruel,&nbsp;F. Rueda-Teruel,&nbsp;E. Ruiz-Chóliz,&nbsp;J. Ruz,&nbsp;J. Schaffran,&nbsp;T. Schiffer,&nbsp;S. Schmidt,&nbsp;U. Schneekloth,&nbsp;L. Schönfeld,&nbsp;M. Schott,&nbsp;L. Segui,&nbsp;U. R. Singh,&nbsp;P. Soffitta,&nbsp;D. Spiga,&nbsp;M. Stern,&nbsp;O. Straniero,&nbsp;F. Tavecchio,&nbsp;E. Unzhakov,&nbsp;N. A. Ushakov,&nbsp;G. Vecchi,&nbsp;J. K. Vogel,&nbsp;D. M. Voronin,&nbsp;R. Ward,&nbsp;A. Weltman,&nbsp;C. Wiesinger,&nbsp;R. Wolf,&nbsp;A. Yanes-Díaz,&nbsp;Y. Yu","doi":"10.1007/JHEP02(2025)159","DOIUrl":"10.1007/JHEP02(2025)159","url":null,"abstract":"<p>BabyIAXO is the intermediate stage of the International Axion Observatory (IAXO) to be hosted at DESY. Its primary goal is the detection of solar axions following the axion helioscope technique. Axions are converted into photons in a large magnet that is pointing to the sun. The resulting X-rays are focused by appropriate X-ray optics and detected by sensitive low-background detectors placed at the focal spot. The aim of this article is to provide an accurate quantitative description of the different components (such as the magnet, optics, and X-ray detectors) involved in the detection of axions. Our efforts have focused on developing robust and integrated software tools to model these helioscope components, enabling future assessments of modifications or upgrades to any part of the IAXO axion helioscope and evaluating the potential impact on the experiment’s sensitivity. In this manuscript, we demonstrate the application of these tools by presenting a precise signal calculation and response analysis of BabyIAXO’s sensitivity to the axion-photon coupling. Though focusing on the Primakoff solar flux component, our virtual helioscope model can be used to test different production mechanisms, allowing for direct comparisons within a unified framework.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 2","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP02(2025)159.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489542","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":"Asymptotic curvature divergences and non-gravitational theories","authors":"Fernando Marchesano,&nbsp;Luca Melotti,&nbsp;Max Wiesner","doi":"10.1007/JHEP02(2025)151","DOIUrl":"10.1007/JHEP02(2025)151","url":null,"abstract":"<p>We analyse divergences of the scalar curvature <i>R</i> of the vector multiplet moduli space of type IIA string theory compactified on a Calabi-Yau <i>X</i>, along infinite-distance large volume limits. Extending previous results, we classify the origin of the divergence along trajectories which implement decompactifications to F-theory on <i>X</i> and/or emergent heterotic string limits. In all cases, the curvature divergence can be traced back to a 4d rigid field theory that decouples from gravity along the limit. This can be quantified via the asymptotic relation <i>R</i> ~ (Λ_WGC<i>/</i>Λ_sp)^2<i>ν</i>, with Λ_WGC ≡ <i>g</i>_rigid<i>M</i>_P and Λ_sp the species scale. In the UV, the 4d rigid field theory becomes a higher-dimensional, strongly-coupled rigid theory that also decouples from gravity. The nature of this UV theory is encoded in the exponent <i>ν</i>, and it either corresponds to a 5d SCFT, 6d SCFT or a Little String Theory.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 2","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP02(2025)151.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465914","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":"Erratum to: Nonleptonic B-meson decays to next-to-next-to-leading order","authors":"Manuel Egner,&nbsp;Matteo Fael,&nbsp;Kay Schönwald,&nbsp;Matthias Steinhauser","doi":"10.1007/JHEP02(2025)147","DOIUrl":"10.1007/JHEP02(2025)147","url":null,"abstract":"","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 2","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP02(2025)147.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475107","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":"On unitarity of the hypergeometric amplitude","authors":"Gareth Mansfield,&nbsp;Marcus Spradlin","doi":"10.1007/JHEP02(2025)145","DOIUrl":"10.1007/JHEP02(2025)145","url":null,"abstract":"<p>The hypergeometric amplitude is a one-parameter deformation of the Veneziano amplitude for four-point tachyon scattering in bosonic string theory that is consistent with <i>S</i>-matrix bootstrap constraints. In this article we construct a similar hypergeometric generalization of the Veneziano amplitude for type-I superstring theory. We then rule out a large region of the (<i>r, m</i>²<i>, D</i>) parameter space as non-unitary, and establish another large subset of the (<i>r, m</i>²<i>, D</i>) parameter space where all of the residue’s partial wave coefficients are positive. We also analyze positivity in various limits and special cases. As a corollary to our analysis, we are able to directly demonstrate positivity of a wider set of Veneziano amplitude partial wave coefficients than what has been presented elsewhere.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 2","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP02(2025)145.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465915","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}