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TH Preprints

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2026-04-18
04:38
The Spurion Massive EFT (SMEFT) / Northey, Julian L. (Technion) ; Shadmi, Yael (Technion) ; Soreq, Yotam (Technion ; CERN) ; Ueda, Daiki (Technion)
We use the amplitude formulation of the SMEFT to introduce a spurion analysis of the SMEFT low-energy amplitudes in terms of the Higgs VEV. [...]
CERN-TH-2026-054 ; arXiv:2604.14274. - 25.
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2026-04-18
04:37
Probing $τ$ lepton dipole moments at future Lepton Colliders / Buttazzo, Dario (INFN, Pisa) ; Levati, Gabriele (Bern U.) ; Ma, Yang (Louvain U., CP3) ; Maltoni, Fabio (Louvain U., CP3 ; Bologna U. ; INFN, Bologna ; CERN) ; Paradisi, Paride (U. Padua (main) ; INFN, Padua) ; Wang, ZeQiang (Louvain U., CP3)
The electric and magnetic dipole moments of the electron and of the muon provide stringent tests of the Standard Model and sensitive probes of new physics. [...]
IRMP-CP3-26-07 ; CERN-TH-2026-089 ; COMETA-2026-06 ; arXiv:2604.14281. - 8.
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2026-04-18
04:22
Quantum correction to the diffusion term in stochastic inflation from composite-operator matching in Soft de Sitter Effective Theory / Beneke, Martin (Munich, Tech. U.) ; Hager, Patrick (CERN) ; Sanfilippo, Andrea F. (Granada U.)
In the framework of Soft de Sitter Effective Theory (SdSET), the Fokker-Planck equation for the late-time dynamics of the massless minimally coupled scalar field and its extension to the Kramers-Moyal equation are obtained from operator mixing of composite operators of the effective superhorizon field. [...]
TUM-HEP-1599/26 ; CERN-TH-2026-084 ; arXiv:2604.14283. - 65.
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2026-04-17
06:27
$N$-Jettiness Soft Functions Made Simple / Buonocore, Luca (CERN) ; Delto, Maximilian (CERN) ; Melnikov, Kirill (Karlsruhe U., TTP) ; Monni, Pier Francesco (CERN) ; Pikelner, Andrey (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Vita, Gherardo (CERN)
We present a new method to compute the soft function for the $N$-Jettiness variable for arbitrary $N$ at high perturbative orders in QCD. [...]
TTP26-012 ; P3H-26-027 ; CERN-TH-2026-055 ; arXiv:2604.13167. - 35.
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2026-04-17
06:16
Resonance- and Width-aware Parton Shower Evolution and NLO Matching / Höche, Stefan (Fermilab) ; Reichelt, Daniel (CERN)
We introduce a technique for the next-to-leading order accurate simulation of $e^+e^-\to W^+W^-b\bar{b}$ that respects the resonant nature of the process above and near the top-quark pair production threshold. [...]
arXiv:2604.13978 ; FERMILAB-PUB-26-0230-T ; CERN-TH-2026-085 ; MCNET-26-06. - 12.
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2026-04-15
05:13
Quantum simulating multi-particle processes in high energy nuclear physics: dijet production and color (de)coherence / Barata, João (CERN) ; Li, Meijian (Santiago de Compostela U., IGFAE) ; Qian, Wenyang (Santiago de Compostela U., IGFAE ; Hua-Zhong Normal U.) ; Salgado, Carlos A. (Santiago de Compostela U., IGFAE) ; Silva, João M. (LIP, Lisbon ; Lisbon, IST ; Granada U.)
Hard scattering events in high-energy collisions produce highly virtual partons that subsequently fragment into collimated hadronic cascades. [...]
CERN-TH-2026-082 ; arXiv:2604.11616. - 32.
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2026-04-14
04:38
On Exclusive Coherent Production of Bosons in Electron-Proton Collisions / Balkin, Reuven (UC, Santa Cruz) ; Coren, Ta'el (Technion) ; Jentsch, Alexander (Brookhaven) ; Liu, Hongkai (Brookhaven) ; Ovchynnikov, Maksym (CERN) ; Soreq, Yotam (Technion ; CERN) ; Trifinopoulos, Sokratis (CERN ; Zurich U.)
We study the exclusive electroproduction process $e+p\to e'+p'+X$, with $X$ a single-particle final state, in the forward-proton kinematics relevant for the future Electron-Ion Collider (EIC). [...]
arXiv:2604.08667 ; CERN-TH-2026-047. - 11.
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2026-04-14
04:36
Gravitational Memory from Hairy Binary Black Hole Mergers / Gasparotto, Silvia (CERN) ; Zosso, Jann (Bohr Inst.) ; Aresté Saló, Llibert (Leuven U.) ; Doneva, Daniela D. (U. Valencia (main) ; U. Tubingen) ; Yazadjiev, Stoytcho S. (Sofia U. (main))
Gravitational-wave memory is a low-frequency, non-oscillatory component of the radiation field that provides a potentially powerful but as yet undetected probe of strong-field gravity. [...]
CERN-TH-2026-086 ; arXiv:2604.09350. - 26.
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2026-04-14
04:34
How well can the QCD axion hide? / Lee, Sung Mook (CERN) ; Ramos, Maria (CERN) ; Vilches, Fuensanta (Granada U.)
Motivated UV frameworks generically predict the existence of multiple axion fields. [...]
CERN-TH-2026-087 ; arXiv:2604.08657. - 19.
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2026-04-14
04:34
Gardening on the Moon: An Advection-Diffusion Model to Guide the Search for Supernova Debris in the Lunar Regolith / Costello, Emily S. (U. Hawaii (main)) ; Ellis, John (CERN ; King's Coll. London (main)) ; Fields, Brian D. (Illinois U., Urbana (main)) ; Surman, Rebecca (U. Notre Dame (main)) ; Wang, Xilu (CAS, Beijing)
The vertical redistribution of materials in the lunar regolith - ranging from continuously produced space-weathering products to sporadic pulses of supernova- or kilonova-derived isotopes - remains a fundamental problem in planetary science. [...]
KCL-PH-TH/2026-10 ; CERN-TH-2026-073 ; arXiv:2604.09524. - 14.
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