782 citations · 1.7k across the 64 of their papers we have counts for
69 papers
Neutrino Direct Simulation Monte Carlo: Accurate modeling of out-of-equilibrium decaying cosmological relics
Kensuke Akita, Miguel Escudero, Oleksii Ihnatenko +1
We consider nonstandard cosmologies in which decaying relics inject energy at MeV temperatures, driving neutrinos out of equilibrium. The subsequent neutrino evolution shapes predi…
SHiP as a (post-)discovery machine: identifying the diphoton signals' origin
Matei Climescu, Malte Fogde Mikkelsen, Maksym Ovchynnikov
The upcoming SHiP experiment may probe interaction strengths of decaying feebly coupled particles several orders of magnitude below existing limits. In the event of a discovery, it…
Rethinking search signatures: Hadronic decays of GeV-scale feebly coupled particles
Viktor Kryshtal, Maksym Ovchynnikov
Experimental searches for GeV-scale feebly interacting particles commonly target the simplest decay signatures with two charged particles, including hadrons. Hadronic modes often d…
Heavy neutral leptons beyond the BBN bound: probing the lepton asymmetry of the Universe
Kensuke Akita, Maksym Ovchynnikov, Vsevolod Syvolap
Hadronically decaying particles with lifetimes are excluded by Big Bang Nucleosynthesis almost independently of their abundance: the mesons from their decay…
Measurement of the muon neutrino charged-current cross section with SND@LHC
LHC Collaboration, D. Abbaneo, S. Ahmad +163
We report a measurement of the muon neutrino charged-current (CC) interaction cross section on tungsten using the electronic detectors of the SND@LHC experiment at the CERN Large H…
Detector performance at SHiP for cascade-produced long-lived particles
Matei Climescu, Yehor Kyselov, Maksym Ovchynnikov
Previous studies have shown that cascade production in the thick target of the SHiP experiment may substantially enhance the number of light long-lived particles (LLPs) decaying in…
What does it take to have at CMB times?
Miguel Escudero, Maksym Ovchynnikov, Neal Weiner
The vast majority of extensions of the Standard Model affecting the number of effective relativistic neutrino species () do so additively, namely, they enhance this qu…
On Exclusive Coherent Production of Bosons in Electron-Proton Collisions
Reuven Balkin, Ta'el Coren, Alexander Jentsch +4
We study the exclusive electroproduction process , with a single-particle final state, in the forward-proton kinematics relevant for the future Electron-Ion Col…
Study of the Run-3 muon flux at the SND@LHC experiment
LHC Collaboration
Long-range muons produced in proton-proton collisions at the ATLAS interaction point constitute the primary background for neutrino interaction searches at the SND@LHC experiment.…
Measurement of the Muon Flux at SND@LHC: Results from the 2023-2025 Proton and Heavy-Ion Periods
LHC Collaboration
The SND@LHC experiment investigates neutrinos in the forward pseudorapidity range. The detector consists of a veto system, a scintillating fiber tracker interleaved…
SND@LHC Upgrade for the High-Luminosity LHC: Physics Reach and Installation Scenarios
LHC Collaboration
The SND@LHC experiment is currently taking data at the Large Hadron Collider (LHC), exploring the unique forward region at pseudorapidities from 7.2 to 8.4. Its physics programme c…
Braking protons at the EIC: from invisible meson decay to new physics searches
Reuven Balkin, Ta'el Coren, Alexander Jentsch +4
We investigate the sensitivity of the Electron-Ion Collider~(EIC) to invisible final states in coherent exclusive electroproduction. The characteristic signal is a forward proton w…
Feebly Interacting Particles: FIPs at LHCb
J. Alimena, J. Boyd, G. Cacciapaglia +36
With the establishment and maturation of the experimental programs searching for new physics with sizeable couplings at the LHC, there is an increasing interest in the broader part…
Physics Briefing Book: Input for the 2026 update of the European Strategy for Particle Physics
Jorge de Blas, Monica Dunford, Emanuele Bagnaschi +127
The European Strategy for Particle Physics (ESPP) reflects the vision and presents concrete plans of the European particle physics community for advancing human knowledge in fundam…
Nucleosynthesis and CMB bounds on photophilic ALPs: a fresh look
Miguel Escudero, Clara Garcia-Perez, Maksym Ovchynnikov
We provide a fresh look at the cosmological constraints on axion-like particles (ALPs) that couple predominantly to photons, focusing on lifetimes …
Sub-GeV dark matter and multi-decay signatures from dark showers at beam-dump experiments
Elias Bernreuther, Nicoline Hemme, Felix Kahlhoefer +2
In models of strongly-interacting dark sectors, the production of dark quarks at accelerators can give rise to dark showers with multiple dark mesons in the final state. If some of…
Affleck-Dine Leptoflavorgenesis
Kensuke Akita, Koichi Hamaguchi, Maksym Ovchynnikov
We propose a scenario to produce large primordial lepton flavor asymmetries with vanishing total lepton asymmetry, based on the Affleck-Dine mechanism with Q-ball formation. This s…
The SND@LHC neutron shielding
LHC Collaboration
The design and construction of a neutron shielding for the SND@LHC detector, which utilizes a combination of plexiglass and borated polyethylene, is presented. FLUKA simulations we…
Precision calculation of with Neutrino Direct Simulation Monte Carlo
Oleksii Ihnatenko, Maksym Ovchynnikov
Neutrino Direct Simulation Monte Carlo (DSMC) is a Monte Carlo method for solving the neutrino Boltzmann equation in the early Universe, designed to track the evolution of cosmi…
Maximal parameter space of sterile neutrino dark matter with lepton asymmetries
Kensuke Akita, Koichi Hamaguchi, Maksym Ovchynnikov
We delineate the maximal parameter space of sterile neutrino dark matter in the presence of lepton flavor asymmetries. We focus on large flavor asymmetries with vanishing total lep…
Summary Report of the Physics Beyond Colliders Study at CERN
R. Alemany Fernández, M. Au, G. Arduini +80
The Physics Beyond Collider (PBC) Study Group was initially mandated by the CERN Management to prepare the previous European Particle Physics Strategy Update for CERN projects othe…
New physics particles mixing with mesons: production in the fragmentation chain
Yehor Kyselov, Stephen Mrenna, Maksym Ovchynnikov
A class of extensions to the Standard Model adds hypothetical long-lived particles (LLPs) that have mass- or kinetic-mixing with neutral mesons, such as pions or rho mesons. The mi…
Studies of Hadronic Showers in SND@LHC
LHC Collaboration
The SND@LHC experiment was built for observing neutrinos arising from LHC pp collisions. The detector consists of two sections: a target instrumented with SciFi modules and a hadro…
Input from the SND@LHC collaboration to the 2026 Update to the European Strategy for Particle Physics
LHC collaboration
By observing collider neutrino interactions of different flavours, the SND@LHC and Faser experiments have shown that the LHC can make interesting contributions to neutrino physics.…