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ABOUT PREPRINTS
The Preprints collection aims to cover as far as possible all the grey literature in particle physics and its related technologies. The collection contains something like 400,000 documents, out of which about 50% can be accessed electronically. The documents originate from a variety of institutes all over the world. The collection, currently available, starts in 1979 and it has a full coverage of the arXiv.org e-Print archive since its beginning in 1991.
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Preprints

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2026-04-18
04:39
Search for heavy resonances decaying into four-lepton final states via light bosons in proton-proton collisions at $\sqrt{s}$ = 13 TeV / CMS Collaboration
A search for a resonance heavier than 250 GeV decaying into four leptons via two intermediate bosons is presented. [...]
arXiv:2604.14236 ; CMS-EXO-24-006 ; CERN-EP-2026-072. - 33.
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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
04:33
Charmonium radiative transitions to dileptons from lattice QCD: The case of $h_c \to \eta_c \ell^+\ell^-$ and $\chi_{c1} \to J/\psi\,\ell^+\ell^-$ / Bečirević, D. (IJCLab, Orsay ; CERN ; U. Paris-Saclay) ; Di Palma, R. (INFN, Rome ; Rome U.) ; Frezzotti, R. (Rome U., Tor Vergata) ; Gagliardi, G. (INFN, Rome3) ; Lubicz, V. (INFN, Rome) ; Sanfilippo, F. (INFN, Rome3) ; Tantalo, N. (Rome U., Tor Vergata)
We present a lattice QCD study of dilepton production in charmonium transitions, specifically focusing on the $1^{+-} \to 0^{-+}$ and $1^{++} \to 1^{--}$ processes: $h_c \to η_c \ell^+ \ell^-$ and $χ_{c1} \to J/ψ\ell^+ \ell^-$, where $\ell = e, μ$. [...]
arXiv:2604.15256. - 29.
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2026-04-18
04:27
Study of the $B^0 \to Λ_c^+ \barΛ_c^- K_S^0$ decay / LHCb Collaboration
The decay $B^0 \to Λ_c^+ \barΛ_c^- K_S^0$ is studied at LHCb for the first time using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of $\sqrt{s} = 13$ TeV, corresponding to an integrated luminosity of 5.4 fb$^{-1}$. [...]
arXiv:2604.15040 ; LHCb-PAPER-2025-072 ; CERN-EP-2026-073. - 22.
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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
06:26
Highly boosted dielectron identification in proton-proton collisions at $\sqrt{s}$ = 13 TeV / CMS Collaboration
A new technique is developed to identify dielectrons (e$^+$e$^-$) with Lorentz boost $γ_\mathrm{L}$$\gt$ 20 that produce one single merged cluster in the electromagnetic calorimeter of the CMS detector. [...]
arXiv:2604.13320 ; CMS-EGM-24-002 ; CERN-EP-2026-092. - 41.
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2026-04-17
06:26
Search for resonances in four top quark events in the 2 lepton final state / Stafford, Dominic W. (DESY)
A first search is presented for BSM resonances in four top quark production in the 2 lepton channel, using $138\mathrm{fb}^{-1}$$pp$ data collected at $\sqrt{s}=13$ TeV, and $35\mathrm{fb}^{-1}$$\sqrt{s}=13.6$ TeV $pp$ data. [...]
arXiv:2604.14058. - 4.
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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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