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2025-02-27
04:23
Collinear Approximations for LHC Cross Sections: Factorization and Resummation / Mistlberger, Bernhard (SLAC) ; Vita, Gherardo (CERN)
We explore a factorization theorem for color singlet production cross sections at the LHC in the limit of additional radiation becoming collinear to the direction of either of the colliding protons. [...]
CERN-TH-2025-041 ; SLAC-PUB-250203 ; arXiv:2502.17548. - 32.
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2025-02-27
04:17
Real-time simulation of jet energy loss and entropy production in high-energy scattering with matter / Barata, João (CERN) ; Rico, Enrique (CERN)
In analogy to high-energy nuclear scattering experiments, we study a real-time scattering process between a propagating state and a dense target in $1+1$-d massive QED. [...]
CERN-TH-2025-019 ; arXiv:2502.17558. - 12.
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2025-02-25
04:01
Lepton Flavor Asymmetries: from the early Universe to BBN / Domcke, Valerie (CERN) ; Escudero, Miguel (CERN) ; Fernandez Navarro, Mario (Glasgow U.) ; Sandner, Stefan (Los Alamos)
Large primordial lepton flavor asymmetries with almost vanishing total baryon-minus-lepton number can evade the usual BBN and CMB constraints if neutrino oscillations lead to perfect flavor equilibration. [...]
CERN-TH-2025-010 ; LA-UR-25-20235 ; arXiv:2502.14960. - 42.
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2025-02-22
04:10
Anomalous Dimension of a General Effective Gauge Theory I: Bosonic Sector / Aebischer, Jason (CERN) ; Bresciani, Luigi C. (Padua U. ; INFN, Padua) ; Selimovic, Nudzeim (INFN, Padua)
We classify the physical operators of the most general bosonic effective gauge theory up to dimension six using on-shell methods. [...]
CERN-TH-2025-032 ; arXiv:2502.14030. - 47.
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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. [...]
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 $g-2$ / 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 : 10.22323/1.466.0270 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.

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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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