2025-05-21
04:14 |
Αναλυτική εγγραφή
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2025-04-01
04:28 |
Axial perturbations of black holes with primary scalar hair
/ Charmousis, Christos (IJCLab, Orsay ; CERN) ; Iteanu, Simon (IJCLab, Orsay) ; Langlois, David (APC, Paris) ; Noui, Karim (IJCLab, Orsay)
We study axial perturbations of static black holes with primary hair in a family of degenerate higher-order scalar-tensor (DHOST) theories. These solutions possess a scalar charge, fully independent of the mass, leading to a continuous one-parameter deformation of the standard Schwarzschild black hole. [...]
arXiv:2503.22348; CERN-TH-2025-058.-
2025 - 38 p.
- Published in : JCAP 2505 (2025) 102
Fulltext: PDF;
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Αναλυτική εγγραφή
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2025-02-18
05:11 |
The hadronic contribution to the running of $\alpha$ and the electroweak mixing angle
/ Conigli, Alessandro (Helmholtz Inst., Mainz ; Darmstadt, GSI) ; von Hippel, Georg (U. Mainz, PRISMA) ; Kuberski, Simon (CERN) ; Meyer, Harvey B. (Helmholtz Inst., Mainz ; Darmstadt, GSI ; U. Mainz, PRISMA) ; Ottnad, Konstantin (U. Mainz, PRISMA) ; Wittig, Hartmut (Helmholtz Inst., Mainz ; Darmstadt, GSI ; U. Mainz, PRISMA)
We report on our update to [1] on the hadronic running of electroweak couplings from $O(a)$-improved Wilson fermions with $N_f=2+1$ flavours. The inclusion of additional ensembles at very fine lattice spacings together with a number of techniques to split the different contributions for a better control of cutoff effects allows us to substantially improve the precision. [...]
arXiv:2502.10159; MITP-25-007; CERN-TH-2025-022.-
2025-02-12 - 10 p.
- Published in : PoS LATTICE2024 (2025) 287
Fulltext: 2502.10159 - PDF; document - PDF;
In : 41st International Symposium on Lattice Field Theory (Lattice 2024), Liverpool, United Kingdom, 20 Jul - 3 Aug 2024, pp.287
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Αναλυτική εγγραφή
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2025-02-18
04:58 |
Machine-learning techniques as noise reduction strategies in lattice calculations of the muon $g-2$
/ Wittig, Hartmut (U. Mainz, PRISMA ; Mainz U., Inst. Phys. ; Darmstadt, GSI) ; Blum, Thomas (Connecticut U.) ; Conigli, Alessandro (Mainz U., Inst. Phys. ; Darmstadt, GSI) ; Geyer, Lukas (U. Mainz, PRISMA) ; Kuberski, Simon (CERN) ; Segner, Alexander (Mainz U., Inst. Phys. ; Darmstadt, GSI ; U. Mainz, PRISMA)
Lattice calculations of the hadronic contributions to the muon anomalous magnetic moment are numerically highly demanding due to the necessity of reaching total errors at the sub-percent level. Noise-reduction techniques such as low-mode averaging have been applied successfully to determine the vector-vector correlator with high statistical precision in the long-distance regime, but display an unfavourable scaling in terms of numerical cost. [...]
arXiv:2502.10237; CERN-TH-2025-038; MITP-25-010.-
2025-02-14 - 9 p.
- Published in : PoS LATTICE2024 (2025) 270
Fulltext: 2502.10237 - PDF; document - PDF;
In : 41st International Symposium on Lattice Field Theory (Lattice 2024), Liverpool, United Kingdom, 20 Jul - 3 Aug 2024, pp.270
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Αναλυτική εγγραφή
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2025-02-18
04:53 |
The Irrelevance of Primordial Black Hole Clustering in the LVK mass range
/ Crescimbeni, F. (U. Rome La Sapienza (main) ; INFN, Rome) ; Desjacques, V. (Technion) ; Franciolini, G. (CERN) ; Ianniccari, A. (Geneva U., CAP) ; Iovino, A.J. (Geneva U., CAP) ; Perna, G. (Padua U. ; Padua U., Astron. Dept. ; INFN, Padua) ; Perrone, D. (Geneva U., CAP) ; Riotto, A. (Geneva U., CAP) ; Veermäe, H. (NICPB, Tallinn)
We show that in realistic models where primordial black holes are formed due to the collapse of sizeable inflationary perturbations, their initial spatial clustering beyond Poisson distribution does not play any role in the binary mergers, including sub-solar primordial black holes, responsible for the gravitational waves detectable by LIGO-Virgo-KAGRA. This is a consequence of the existing FIRAS CMB distortion constraints on the relevant scales. [...]
arXiv:2502.01617; CERN-TH-2025-027.-
2025-05-02 - 27 p.
- Published in : JCAP 2505 (2025) 001
Fulltext: 2502.01617 - PDF; publication - PDF;
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Αναλυτική εγγραφή
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2025-02-15
04:36 |
Αναλυτική εγγραφή
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2025-02-14
04:02 |
Αναλυτική εγγραφή
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2025-02-13
04:13 |
Αναλυτική εγγραφή
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2025-02-11
15:04 |
Flavor mixing in charmonium and light mesons with optimal distillation profiles
/ Urrea-Niño, Juan Andrés (Wuppertal U.) ; Knechtli, Francesco (Wuppertal U.) ; Finkenrath, Jacob (CERN) ; Korzec, Tomasz (Wuppertal U.) ; Peardon, Michael J. (Trinity Coll., Dublin) ; Höllwieser, Roman (Wuppertal U.)
We study the light meson - charmonium - glueball mixing using flavor-singlet meson operators built from optimal distillation profiles together with purely gluonic operators in different $J^{PC}$ channels at two different pion masses ($\approx$$420$, $800$ MeV) in two $N_{\rm f} = 3 + 1$ ensembles at close to physical charm quark mass. We observe non-zero mixing correlations between the different types of operators and quantify the overlaps between states created by them and the energy eigenstates by means of a GEVP formulation. [...]
arXiv:2502.04977; WUB/25-02; CERN-TH-2025-026.-
2025-02-12 - 10 p.
- Published in : PoS: LATTICE2024 (2025) , pp. 080
Fulltext: 2502.04977 - PDF; document - PDF;
In : 41st International Symposium on Lattice Field Theory (Lattice 2024), Liverpool, United Kingdom, 20 Jul - 3 Aug 2024, pp.080
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Αναλυτική εγγραφή
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2025-02-08
07:20 |
Classical Black Hole Probes of UV Scales
/ Calderón-Infante, José (CERN) ; Delgado, Matilda (Garching, Max Planck Inst. ; Harvard U., Phys. Dept.) ; Li, Yixuan (Padua U. ; INFN, Padua) ; Lust, Dieter (Garching, Max Planck Inst. ; Munich U., ASC) ; Uranga, Angel M. (Madrid, IFT)
In the context of the Swampland program, black hole attractors have been employed to probe infinite distances in moduli space, where the EFT cutoff goes to zero in Planck units and UV effects become significant. In this paper, we take the perspective of the two-derivative action of string theoretic effective field theories and explore various families of extremal black hole solutions that probe infinite distance limits at their horizons. [...]
arXiv:2502.03514; CERN-TH-2025-033; MPP-2025-10; LMU-ASC 04/25; IFT-UAM/CSIC-25-009.-
2025 - 58 p.
- Published in : JHEP 2506 (2025) 061
Fulltext: 2502.03514 - PDF; document - PDF;
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