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CERN Theory

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2025-03-19
04:32
Testing the QCD formation time with reconstructed parton splittings / Brewer, Jasmine (Oxford U., Theor. Phys.) ; van der Schee, Wilke (CERN ; Utrecht U. (main) ; NIKHEF, Amsterdam) ; Wiedemann, Urs
In high-energy elementary collisions the space-time ordering of parton branching processes is not accessible experimentally. [...]
CERN-TH-2025-053 ; arXiv:2503.11764. - 22.
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2025-03-18
04:01
Forecasting Constraints on SIGW with Future Pulsar Timing Array Observations / Cecchini, Chiara ; Franciolini, Gabriele ; Pieroni, Mauro
Pulsar Timing Arrays are playing a crucial role in the ongoing gravitational wave astronomy revolution. [...]
CERN-TH-2025-045 ; arXiv:2503.10805. - 18.
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2025-03-15
04:31
$\eta$, $\eta^\prime$ mesons from lattice QCD in fully physical conditions / Ottnad, Konstantin (U. Mainz, PRISMA ; Mainz U., Inst. Kernphys.) ; Bacchio, Simone (Cyprus Inst.) ; Finkenrath, Jacob (CERN) ; Kostrzewa, Bartosz (Bonn U., HISKP ; U. Bonn, Phys. Inst., BCTP) ; Petschlies, Marcus (Bonn U., HISKP ; U. Bonn, Phys. Inst., BCTP) ; Pittler, Ferenc (Cyprus Inst.) ; Urbach, Carsten (Bonn U., HISKP ; U. Bonn, Phys. Inst., BCTP) ; Wenger, Urs (Bern U.)
We determine masses and mixing parameters of the $\eta$ and $M_{\eta^\prime}$ meson in lattice QCD. [...]
MITP-25-021 ; CERN-TH-2025-052 ; arXiv:2503.09895. - 24.
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2025-03-11
04:09
Status and outlook of quark flavour physics / Tsang, Justus Tobias (CERN)
In recent years there has been impressive progress in quark flavour physics, with current efforts tackling complicated quantities such as for example inclusive decays, decays to QCD-unstable final states and radiative decays. [...]
CERN-TH-2025-050 ; arXiv:2503.05554. - 14.
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2025-03-07
04:17
Large charge meets semiclassics in $\mathcal{N}=4$ super Yang-Mills / Brown, Augustus (Queen Mary, U. of London) ; Galvagno, Francesco (Queen Mary, U. of London) ; Grassi, Alba (U. Geneva (main)) ; Iossa, Cristoforo (U. Geneva (main)) ; Wen, Congkao (Queen Mary, U. of London)
We study the large-charge sector of $\mathcal{N}=4$ super Yang-Mills theory (SYM) with $SU(N)$ gauge group by constructing a special class of half-BPS heavy operators, termed "canonical operators". [...]
CERN-TH-2025-016 ; QMUL-PH-25-03 ; arXiv:2503.02028. - 49.
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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. 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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