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Derniers ajouts:
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. [...]
MITP-25-007 ; CERN-TH-2025-022 ; arXiv:2502.10159. - 10.
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2025-02-18
04:58
Machine-learning techniques as noise reduction strategies in lattice calculations of the muon $g-2$ / 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) ; Wittig, Hartmut (U. Mainz, PRISMA ; Mainz U., Inst. Phys. ; Darmstadt, GSI)
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. [...]
CERN-TH-2025-038 ; MITP-25-010 ; arXiv:2502.10237. - 9.
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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. [...]
CERN-TH-2025-027 ; arXiv:2502.01617. - 14.
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2025-02-15
04:36
Precision tools for the simulation of double-Higgs production via vector-boson fusion / Jäger, Barbara (Tubingen U.) ; Karlberg, Alexander (CERN) ; Reinhardt, Simon (Tubingen U.)
We present two precision tools for the simulation of Higgs-pair production via vector-boson fusion in the kappa framework for the parameterization of non-standard Higgs couplings. [...]
CERN-TH-2025-030 ; arXiv:2502.09112. - 18.
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2025-02-14
04:02
Factorisation schemes for proton PDFs / Delorme, Stéphane (Cracow, INP) ; Kusina, Aleksander (Cracow, INP) ; Siódmok, Andrzej (Jagiellonian U.) ; Whitehead, James (Cracow, INP ; Jagiellonian U.)
Beyond leading-order, perturbative QCD requires a choice of factorisation scheme to define the parton distribution functions (PDFs) and hard-process cross-section. [...]
CERN-TH-2025-037 ; IFJPAN-IV-2025-3 ; MCNET-25-02 ; arXiv:2501.18289. - 53.
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2025-02-13
04:13
Accelerating Berends-Giele recursion for gluons in arbitrary dimensions over finite fields / Cruz-Martinez, Juan M. (CERN) ; De Laurentis, Giuseppe (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Pellen, Mathieu (Freiburg U.)
This work provides a proof of concept for the computation of pure gluonic amplitudes in quantum chromodynamics (QCD) on graphics processing units (GPUs). [...]
CERN-TH-2025-017 ; FR-PHENO-2025-001 ; arXiv:2502.07060. - 16.
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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.) ; Finkenrath, Jacob (CERN) ; Höllwieser, Roman (Wuppertal U.) ; Knechtli, Francesco (Wuppertal U.) ; Korzec, Tomasz (Wuppertal U.) ; Peardon, Michael (Trinity Coll., Dublin)
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. [...]
WUB/25-02 ; CERN-TH-2025-026 ; arXiv:2502.04977. - 11.
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2025-02-11
15:03
Fermions and the Renormalisation Group at Large N / Cresswell-Hogg, Charlie (Sussex U.) ; Litim, Daniel F. (Sussex U. ; CERN)
We investigate fermionic quantum field theories using functional renormalisation. [...]
CERN-TH-2024-078 ; arXiv:2502.04473. - 29.
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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. [...]
CERN-TH-2025-033 ; MPP-2025-10 ; LMU-ASC 04/25 ; IFT-UAM/CSIC-25-009 ; arXiv:2502.03514. - 64.
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2025-02-06
06:32
On quivers, spectral networks and black holes / Arnaudo, Paolo (U. Southampton (main)) ; Grassi, Alba (U. Geneva (main) ; CERN) ; Hao, Qianyu (U. Geneva (main))
It was recently found that connection coefficients of the Heun equation can be derived in closed form using crossing symmetry in two-dimensional Liouville theory via the Nekrasov-Shatashvili functions. [...]
CERN-TH-2025-015 ; arXiv:2502.01526. - 45.
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