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TH Preprints

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2026-02-19
04:58
Enhanced Cosmic-Ray Antinuclei Fluxes with Dark Matter Annihilation into SUEPs / Di Mauro, Mattia (INFN, Turin) ; Gemmell, Caleb (Wisconsin U., Madison ; Toronto U.) ; Batz, Austin (Oregon U. ; LBL, Berkeley) ; Curtin, David (Toronto U.) ; Donato, Fiorenza (INFN, Turin) ; Fornengo, Nicolao (INFN, Turin) ; Kribs, Graham D. (Oregon U. ; CERN)
Standard-Model (SM) hadronic parton showers initiated by secondary cosmic-ray production or dark matter (DM) annihilations robustly predict very low antinuclei yields and a strong additional suppression for heavier antinuclei. [...]
arXiv:2602.15132 ; CERN-TH-2026-012. - 20.
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2026-02-17
04:27
The Dark Side of the Moon: Listening to Scalar-Induced Gravitational Waves / Blas, D. (Barcelona, IFAE ; ICREA, Barcelona) ; Foster, J.W. (Wisconsin U., Madison) ; Gouttenoire, Y. (U. Mainz, PRISMA ; Mainz U., Inst. Phys. ; Cornell U., Phys. Dept. ; Cornell U., LEPP ; Paris, Inst. Astrophys.) ; Iovino, A.J. (New York U., Abu Dhabi) ; Musco, I. (Nova Gorica U. ; Environ. Sci. School, Slovenia ; Stefan Inst., Ljubljana) ; Trifinopoulos, S. (CERN ; Zurich U.) ; Vanvlasselaer, M. (U. Barcelona (main))
The collapse of large-amplitude primordial curvature perturbations into planetary-mass primordial black holes generates a scalar-induced gravitational wave background in the $μ$Hz frequency range that may be detectable by future Lunar Laser Ranging and Satellite Laser Ranging data. [...]
CERN-TH-2026-021 ; arXiv:2602.12252. - 8.
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2026-02-17
04:25
Precise QCD Predictions for Hadron-in-jet Production in $e^+e^-$ Collisions / Bonino, Leonardo (Zurich U.) ; Gehrmann-De Ridder, Aude (Zurich U. ; Zurich, ETH) ; Gehrmann, Thomas ; Huss, Alexander (Zurich U. ; CERN) ; Merlotti, Francesco (Zurich, ETH) ; Stagnitto, Giovanni (Genoa U.)
The production of identified hadrons inside jets in $e^+ e^-$ annihilation allows for detailed studies of parton-to-hadron fragmentation functions in a clean environment. [...]
arXiv:2602.12344 ; CERN-TH-2026-019 ; ZU-TH 03/26. - 6.
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2026-02-13
04:01
Dark Matter from Eternity / Franciolini, G. (U. Padua (main) ; INFN, Padua ; CERN) ; Peloso, M. (U. Padua (main) ; INFN, Padua) ; Riotto, A. (U. Geneva (main))
We propose that the totality of dark matter in the universe might ascribe its origin to one of the key properties of cosmological inflation, that it may be eternal: regions that at the end of the primordial accelerated expansion of the universe never reheated, but keep eternally inflating, manifest themselves as primordial black holes in our observable universe. [...]
arXiv:2602.08338 ; CERN-TH-2026-015. - 5.
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2026-02-06
06:08
Heavy-quark production in deep-inelastic scattering -- Mellin moments of structure functions / Klann, Marco (Hamburg U., Inst. Theor. Phys. II) ; Moch, Sven-Olaf (Hamburg U., Inst. Theor. Phys. II) ; Schönwald, Kay (CERN)
We compute Mellin moments of the heavy-quark structure functions in deep-inelastic scattering at next-to-leading order in quantum chromodynamics, retaining their full dependence on the heavy-quark mass. [...]
DESY-26-013 ; CERN-TH-2026-014 ; arXiv:2602.04455. - 51.
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2026-02-03
04:54
Compact U(1) Lattice Gauge Theory in Superconducting Circuits with Infinite-Dimensional Local Hilbert Spaces / Alcaine-Cuervo, J.M. (Basque U., Bilbao ; U. Basque Country, Leioa) ; Pradhan, S. (Basque U., Bilbao ; Donostia Intl. Phys. Ctr., San Sebastian) ; Rico, E. (Basque U., Bilbao ; Donostia Intl. Phys. Ctr., San Sebastian ; CERN ; IKERBASQUE, Bilbao) ; Shi, Z. (U. Waterloo (main)) ; Wilson, C.M. (U. Waterloo (main))
We propose a superconducting-circuit architecture that realizes a compact U(1) lattice gauge theory using the intrinsic infinite-dimensional Hilbert space of phase and charge variables. [...]
CERN-TH-2026-003 ; arXiv:2601.23150. - 21.
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2026-01-31
04:25
Neural S-matrix bootstrap II: solvable 4d amplitudes with particle production / Gumus, Mehmet Asim (Annecy, LAPTH) ; Leflot, Damien (Annecy, LAPTH) ; Tourkine, Piotr (Annecy, LAPTH) ; Zhiboedov, Alexander (CERN)
We study a model for nonperturbative unitarization of the four-point contact scalar amplitude in four dimensions. [...]
arXiv:2601.22145 ; LAPTH-048/25 ; CERN-TH-2026-010. - 67.
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2026-01-23
04:21
The Simplest $B$ Decay, Precisely / Cornella, Claudia (CERN) ; Ferré, Max (U. Mainz, PRISMA) ; König, Matthias (U. Mainz, PRISMA) ; Neubert, Matthias (U. Mainz, PRISMA ; Cornell U., LEPP)
We derive the QCD$\times$QED factorization theorem governing the leptonic decay $B^-\toμ^-\barν_μ(γ)$ at all orders in $α_s$ and $α$. [...]
CERN-TH-2026-006 ; MITP-25-075 ; arXiv:2601.14361. - 134.
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2026-01-23
04:07
Top quark FCNC in Randall-Sundrum models: post-LHC allowed rates and searches at $e^+e^-$ and $μ^+ μ^-$ colliders / Airen, Sagar (Maryland U.) ; Franceschini, Roberto (INFN, Rome3 ; Rome III U. ; CERN)
We present the sensitivity to Flavor Changing Neutral Currents (FCNC) in interactions involving the top quark at future $e^+e^-$ and $μ^+μ^-$ machines. [...]
arXiv:2601.14966 ; CERN-TH-2025-236. - 20.
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2026-01-17
05:51
A cosmologist's take on Little Red Dots / De Luca, Valerio (Johns Hopkins U.) ; Del Grosso, Loris (Johns Hopkins U.) ; Franciolini, Gabriele (Padua U. ; INFN, Padua ; CERN) ; Kritos, Konstantinos (Johns Hopkins U.) ; Berti, Emanuele (Johns Hopkins U.) ; D'Orazio, Daniel (Johns Hopkins U. ; Baltimore, Space Telescope Sci. ; Bohr Inst.) ; Silk, Joseph (Johns Hopkins U. ; Paris, Inst. Astrophys. ; Oxford U.)
The James Webb Space Telescope (JWST) has uncovered a population of compact, high-redshift sources, the Little Red Dots (LRDs), which may host supermassive black holes (BHs) significantly heavier than their stellar content compared with local scaling relations. [...]
arXiv:2512.19666 ; CERN-TH-2025-261. - 11.
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