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Holographic bound of Casimir effect in general dimensions
IF 5.4 1区 物理与天体物理
Journal of High Energy Physics Pub Date : 2025-04-02 DOI: 10.1007/JHEP04(2025)023
Rong-Xin Miao
{"title":"Holographic bound of Casimir effect in general dimensions","authors":"Rong-Xin Miao","doi":"10.1007/JHEP04(2025)023","DOIUrl":"10.1007/JHEP04(2025)023","url":null,"abstract":"<p>Recently, it has been proposed that holography imposes a universal lower bound on the Casimir effect for 3d BCFTs. This paper generalizes the discussions to higher dimensions. We find Einstein gravity, DGP gravity, and Gauss-Bonnet gravity sets a universal lower bound of the strip Casimir effect in general dimensions. We verify the holographic bound by free theories and <i>O</i>(<i>N</i>) models in the <i>ϵ</i> expansions. We also derive the holographic bound of the Casimir effect for a wedge and confirm free theories obey it. It implies holography sets a lower bound of the Casimir effect for general boundary shapes, not limited to the strip. Finally, we briefly comment on the impact of mass and various generalizations and applications of our results.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 4","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)023.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761798","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
New horizons for inhomogeneous quenches and Floquet CFT
IF 5.4 1区 物理与天体物理
Journal of High Energy Physics Pub Date : 2025-04-02 DOI: 10.1007/JHEP04(2025)025
Hanzhi Jiang, Márk Mezei
{"title":"New horizons for inhomogeneous quenches and Floquet CFT","authors":"Hanzhi Jiang,&nbsp;Márk Mezei","doi":"10.1007/JHEP04(2025)025","DOIUrl":"10.1007/JHEP04(2025)025","url":null,"abstract":"<p>A fruitful avenue in investigating out-of-equilibrium quantum many-body systems is to abruptly change their Hamiltonian and study the subsequent evolution of their quantum state. If this is done once, the setup is called a quench, while if it is done periodically, it is called Floquet driving. We consider the solvable setup of a two-dimensional CFT driven by Hamiltonians built out of conformal symmetry generators: in this case, the quantum dynamics can be understood using two-dimensional geometry. We investigate how the dynamics is reflected in the holographic dual three-dimensional spacetime and find new horizons. We argue that bulk operators behind the new horizons are reconstructable by virtue of modular flow.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 4","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)025.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761799","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 Nahm transform of multi-fractional instantons
IF 5.4 1区 物理与天体物理
Journal of High Energy Physics Pub Date : 2025-04-02 DOI: 10.1007/JHEP04(2025)031
Mohamed M. Anber, Erich Poppitz
{"title":"The Nahm transform of multi-fractional instantons","authors":"Mohamed M. Anber,&nbsp;Erich Poppitz","doi":"10.1007/JHEP04(2025)031","DOIUrl":"10.1007/JHEP04(2025)031","url":null,"abstract":"<p>We embed the multi-fractional instantons of SU(<i>N</i>) gauge theories on <span>( {mathbbm{T}}^4 )</span> with ’t Hooft twisted boundary conditions into U(<i>N</i>) bundles and use the Nahm transform to study the corresponding configurations on the dual <span>( {hat{mathbbm{T}}}^4 )</span>. We first show that SU(<i>N</i>) fractional instantons of topological charge <span>( Q=frac{r}{N},rin left{1,2,dots, N-1right} )</span>, are mapped to fractional instantons of SU(<span>( hat{N} )</span>) of charge <span>( hat{Q}=frac{r}{hat{N}} )</span>, where <span>( hat{N} )</span> = <i>Nq</i><sub>1</sub><i>q</i><sub>3</sub> <i>− rq</i><sub>3</sub> + <i>q</i><sub>1</sub> and <i>q</i><sub>1<i>,</i>3</sub> are integer-quantized U(1) fluxes. We then explicitly construct the Nahm transform of constant field strength fractional instantons of SU(<i>N</i>) and find the SU(<span>( hat{N} )</span>) configurations they map to. Both the <span>( {mathbbm{T}}^4 )</span> instantons and their <span>( {hat{mathbbm{T}}}^4 )</span> images are self-dual for appropriately tuned torus periods. The Nahm duality can be extended to tori with detuned periods, with detuning parameter ∆, mapping solutions with ∆ &gt; 0 on <span>( {mathbbm{T}}^4 )</span> to ones with <span>( hat{Delta } )</span> &lt; 0 on <span>( {hat{mathbbm{T}}}^4 )</span>. We also recall that fractional instantons appear in string theory precisely via the U(<i>N</i>) embedding, suggesting that studying the end point of tachyon condensation for ∆ ≠ 0 is needed — and is perhaps feasible in a small-∆ expansion, as in field theory studies — in order to understand the appearance and role of fractional instantons in <i>D</i>-brane constructions.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 4","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)031.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761806","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-perturbative topological string theory on compact Calabi-Yau manifolds from M-theory
IF 5.4 1区 物理与天体物理
Journal of High Energy Physics Pub Date : 2025-04-01 DOI: 10.1007/JHEP04(2025)017
Jarod Hattab, Eran Palti
{"title":"Non-perturbative topological string theory on compact Calabi-Yau manifolds from M-theory","authors":"Jarod Hattab,&nbsp;Eran Palti","doi":"10.1007/JHEP04(2025)017","DOIUrl":"10.1007/JHEP04(2025)017","url":null,"abstract":"<p>We show that the full non-perturbative topological string free energy, in the holomorphic limit, follows simply from a target space integrating out calculation of M2 states. Qualitatively, this is the same as the calculation performed by Gopakumar and Vafa, but we find that the final expression must be modified due to a subtlety with poles induced by non-perturbative physics. Accounting for this modification leads to a Gopakumar-Vafa-like formula, which we propose as the exact formulation of the integrating out procedure. Evaluating the formula necessarily requires a contour integral in a complexified Schwinger proper time parameter. We show that this evaluation yields the full non-perturbative topological string free energy, and can be applied to a compact, or non-compact, Calabi-Yau threefold. The explicit formula presented holds as long as the two-cycles wrapped by the branes are rigid and smooth, but the methodology can be used to study also more general Calabi-Yau geometries.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 4","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)017.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749219","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
Precise measurement of CP violating τ EDM through e+e− → γ*, ψ(2s) → τ+τ−
IF 5.4 1区 物理与天体物理
Journal of High Energy Physics Pub Date : 2025-04-01 DOI: 10.1007/JHEP04(2025)001
Xiao-Gang He, Chia-Wei Liu, Jian-Ping Ma, Chang Yang, Zi-Yue Zou
{"title":"Precise measurement of CP violating τ EDM through e+e− → γ*, ψ(2s) → τ+τ−","authors":"Xiao-Gang He,&nbsp;Chia-Wei Liu,&nbsp;Jian-Ping Ma,&nbsp;Chang Yang,&nbsp;Zi-Yue Zou","doi":"10.1007/JHEP04(2025)001","DOIUrl":"10.1007/JHEP04(2025)001","url":null,"abstract":"<p>A nonzero electric dipole moment of a tauon, <i>d</i><sub><i>τ</i></sub>, signals CP violation and provides an important probe for new physics. We study methods to measure <i>d</i><sub><i>τ</i></sub> at low energy <i>e</i><sup>+</sup><i>e</i><sup><i>−</i></sup> colliders through the processes <i>e</i><sup>+</sup><i>e</i><sup><i>−</i></sup> → <i>γ</i><sup>*</sup>, <i>ψ</i>(2<i>S</i>) → <i>τ</i><sup>+</sup><i>τ</i><sup><i>−</i></sup> with <i>τ</i><sup><i>±</i></sup> decays into a charged hadron and a tau neutrino. We point out that, with measuring energies of the charged hadron, Im(<i>d</i><sub><i>τ</i></sub>) can be measured. On the other hand, selecting events of <i>τ</i> decays after traveling more than the detector resolution distance, Re(<i>d</i><sub><i>τ</i></sub>) can also be determined. We find that the precision at Super Tau-Charm Facility (STCF) running at the center energy of <i>m</i><sub><i>ψ</i>(2<i>S</i>)</sub> for 10 year data accumulation, the precision of Im(<i>d</i><sub><i>τ</i></sub>) and Re(<i>d</i><sub><i>τ</i></sub>) are found to be 1.8 and 11 in unit of 10<sup>−18</sup> <i>e</i> cm, respectively. The sensitivity for <i>d</i><sub><i>τ</i></sub> measurement precision at the STCF can be reached its optimum at a central energy of 6<i>.</i>3 GeV, achieving a precision of 0<i>.</i>7 for Im(<i>d</i><sub><i>τ</i></sub>) and 2<i>.</i>8 for Re(<i>d</i><sub><i>τ</i></sub>) in unit of 10<sup><i>−</i>18</sup> <i>e</i> cm.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 4","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)001.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749148","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
Probing light sterile neutrinos in left-right symmetric models with displaced vertices and neutrinoless double beta decay
IF 5.4 1区 物理与天体物理
Journal of High Energy Physics Pub Date : 2025-04-01 DOI: 10.1007/JHEP04(2025)007
Jordy de Vries, Herbi K. Dreiner, Jelle Groot, Julian Y. Günther, Zeren Simon Wang
{"title":"Probing light sterile neutrinos in left-right symmetric models with displaced vertices and neutrinoless double beta decay","authors":"Jordy de Vries,&nbsp;Herbi K. Dreiner,&nbsp;Jelle Groot,&nbsp;Julian Y. Günther,&nbsp;Zeren Simon Wang","doi":"10.1007/JHEP04(2025)007","DOIUrl":"10.1007/JHEP04(2025)007","url":null,"abstract":"<p>An investigation of relatively light (GeV-scale), long-lived right-handed neutrinos is performed within minimal left-right symmetric models using the neutrino-extended Standard Model Effective Field Theory framework. Light sterile neutrinos can be produced through rare decays of kaons, <i>D</i>-mesons, and <i>B</i>-mesons at the Large Hadron Collider (LHC) and the Long-Baseline Neutrino Facility (LBNF) of Fermilab. Their decays could result in displaced vertices, which can be reconstructed. By performing Monte-Carlo simulations, we assess the sensitivities of the future LHC far-detector experiments ANUBIS, CODEX-b, FACET, FASER(2), MoEDAL-MAPP1(2), MATHUSLA, the recently approved beam-dump experiment SHiP, and the upcoming neutrino experiment DUNE at the LBNF, to the right-handed gauge-boson mass <span>( {M}_{W_R} )</span> as functions of neutrino masses. We find that DUNE and SHiP could be sensitive to right-handed gauge-boson masses up to ~ 25 TeV. We compare this reach to indirect searches such as neutrinoless double beta decay, finding that displaced-vertex searches are very competitive.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 4","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)007.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749151","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
( mathcal{N} ) = 2 heterotic strings revisited
IF 5.4 1区 物理与天体物理
Journal of High Energy Physics Pub Date : 2025-04-01 DOI: 10.1007/JHEP04(2025)006
Amit Giveon, Akikazu Hashimoto, David Kutasov
{"title":"( mathcal{N} ) = 2 heterotic strings revisited","authors":"Amit Giveon,&nbsp;Akikazu Hashimoto,&nbsp;David Kutasov","doi":"10.1007/JHEP04(2025)006","DOIUrl":"10.1007/JHEP04(2025)006","url":null,"abstract":"<p>We show that 1 + 1 dimensional vacua of the (0<i>,</i> 2) heterotic string have many properties in common with more recently studied physical systems. The free theory exhibits a symmetric product CFT structure. The single-string Hilbert space splits into sectors labeled by the string winding, <i>w</i>, that contain purely left-moving (for <i>w &gt;</i> 0) and right-moving (for <i>w &lt;</i> 0) excitations. These sectors exhibit infinite-dimensional left and right-moving symmetry algebras, respectively, with central extensions that depend on <i>w</i>. String interactions between left and right-movers appear to lead to a <span>( Toverline{T} )</span> deformation of the free theory.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 4","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)006.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749152","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
On the negative coupling O(N) model in 2d at high temperature
IF 5.4 1区 物理与天体物理
Journal of High Energy Physics Pub Date : 2025-04-01 DOI: 10.1007/JHEP04(2025)012
Paul Romatschke
{"title":"On the negative coupling O(N) model in 2d at high temperature","authors":"Paul Romatschke","doi":"10.1007/JHEP04(2025)012","DOIUrl":"10.1007/JHEP04(2025)012","url":null,"abstract":"<p>In this work, I consider N-component scalar quantum field theory in two dimensions interacting with an upside-down quartic potential. Working in the large N limit, the model can be solved non-perturbatively using the saddle-point method for sufficiently strong negative coupling. At high temperature, the O(N) model dimensionally reduces to <span>( mathcal{PT} )</span>-symmetric quantum mechanics, for which powerful non-perturbative solution methods exist. It is found that the solution from quantum mechanics can be matched by the saddle-point method in quantum field theory when allowing for saddles beyond the principal Riemann sheet. I show that saddle points on non-principal Riemann sheets lead to a fully consistent solution of the 2d negative-coupling O(N) model for all temperatures.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 4","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)012.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749186","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
Muon collider probes of Majorana neutrino dipole moments and masses
IF 5.4 1区 物理与天体物理
Journal of High Energy Physics Pub Date : 2025-04-01 DOI: 10.1007/JHEP04(2025)008
Michele Frigerio, Natascia Vignaroli
{"title":"Muon collider probes of Majorana neutrino dipole moments and masses","authors":"Michele Frigerio,&nbsp;Natascia Vignaroli","doi":"10.1007/JHEP04(2025)008","DOIUrl":"10.1007/JHEP04(2025)008","url":null,"abstract":"<p>Majorana neutrinos may have transitional dipole moments, which violate lepton number as well as lepton flavour. We estimate the sensitivity of future colliders to the electron-muon neutrino dipole moment, <i>λ</i><sub><i>eμ</i></sub>, by considering same-sign dilepton final states. We find that hadron colliders, even the proposed FCC-hh, are sensitive only to <i>|λ</i><sub><i>eμ</i></sub><i>|</i> ≳ 10<sup>−9</sup><i>μ</i><sub><i>B</i></sub> (with <i>μ</i><sub><i>B</i></sub> the Bohr magneton), a value two-three orders of magnitude larger than current bounds from astrophysics and low-energy neutrino-scattering experiments. In the case of a future muon collider, we show that the sensitivity varies from <i>|λ</i><sub><i>eμ</i></sub><i>|</i> ~ 5 ∙ 10<sup>−9</sup><i>μ</i><sub><i>B</i></sub> for energy <span>( sqrt{s} )</span> ≃ 3 TeV, to ∼ 10<sup><i>−</i>12</sup><i>μ</i><sub><i>B</i></sub> for <span>( sqrt{s} )</span> ≃ 50 TeV, matching the current laboratory bounds for <span>( sqrt{s} )</span> ≃ 30 TeV. The singular advantage of the muon collider signal would be a direct, clean identification of lepton number and flavour violation. We also show that a muon collider would improve by orders of magnitude the direct bounds on <i>m</i><sub><i>eμ</i></sub> and <i>m</i><sub><i>μμ</i></sub>, two of the entries of the Majorana neutrino mass matrix. These bounds could be as strong as ∼ 50 keV, still far above the neutrino mass scale.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 4","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)008.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749150","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
Tetraquarks in the Born-Oppenheimer approximation
IF 5.4 1区 物理与天体物理
Journal of High Energy Physics Pub Date : 2025-04-01 DOI: 10.1007/JHEP04(2025)004
D. Germani, B. Grinstein, A. D. Polosa
{"title":"Tetraquarks in the Born-Oppenheimer approximation","authors":"D. Germani,&nbsp;B. Grinstein,&nbsp;A. D. Polosa","doi":"10.1007/JHEP04(2025)004","DOIUrl":"10.1007/JHEP04(2025)004","url":null,"abstract":"<p>The conventional loosely bound molecule interpretation of the <i>X</i>(3872) is not compatible with the recent LHCb experimental measurement of the ratio of branching fractions <span>( mathcal{R} )</span> = Br(<i>X</i> → <i>ψ</i>′<i>γ</i>)<i>/</i>Br(<i>X</i> → <i>ψγ</i>). We systematically determine the entire tetraquark spectrum for <i>J</i> = 0<i>,</i> 1<i>,</i> 2 and refine the calculation of <span>( mathcal{R} )</span> in an improved Born-Oppenheimer description of the <i>X</i>(3872) compact tetraquark. This refinement yields a significantly better agreement with experimental data on <span>( mathcal{R} )</span> and on the spectroscopy of the states themselves. Extending the diquark-antidiquark paradigm to encompass tetraquarks that are linear super-positions of open charm singlets and color octets, we discover that these exotic resonances manifest as compact shallow bound states of quarks in color force potentials.</p>","PeriodicalId":635,"journal":{"name":"Journal of High Energy Physics","volume":"2025 4","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/JHEP04(2025)004.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749154","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
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