Implications of an Improved Neutron-Antineutron Oscillation Search for Baryogenesis: A Minimal Effective Theory Analysis

Abstract

Future neutron-antineutron ($n$-$\bar{n}$) oscillation experiments, such as at the European Spallation Source and the Deep Underground Neutrino Experiment, aim to find first evidence of baryon number violation. We investigate implications of an improved $n$-$\bar{n}$ oscillation search for baryogenesis via interactions of $n$-$\bar{n}$ mediators, parameterized by an effective field theory (EFT). We find that even in a minimal EFT setup, there is overlap between the parameter space probed by $n$-$\bar{n}$ oscillation and the region that can realize the observed baryon asymmetry of the universe. The mass scales of exotic new particles are in the TeV-PeV regime, inaccessible at the LHC or its envisioned upgrades. Given the innumerable high energy theories that can match to, or resemble, the minimal EFT that we discuss, future $n$-$\bar{n}$ oscillation experiments could probe many viable theories of baryogenesis beyond the reach of other experiments.

14 pages, 5 figures; v2: revised discussion on future ESS and DUNE sensitivity, added comment on dinucleon decays

References in corpus (14)

• Leptogenesis
• Search for Proton Decay via $p\to e^{+}{\pi }^0$ and $p\to {\mu }^{+}{\pi }^0$ in 0.31 megaton$\cdot$years exposure of the Super-Kamiokande Water Cherenkov Detector
• Simplified models with baryon number violation but no proton decay
• Post--Sphaleron Baryogenesis
• Neutrino Mass Hierarchy and neutron-anti-neutron Oscillation from Baryogenesis
• Baryogenesis from Oscillations of Charmed or Beautiful Baryons
• A Simple Testable Model of Baryon Number Violation: Baryogenesis, Dark Matter, Neutron-Antineutron Oscillation and Collider Signals
• Search for nucleon decay into charged antilepton plus meson in 0.316 megaton$\cdot$years exposure of the Super-Kamiokande water Cherenkov detector
• Unified TeV Scale Picture of Baryogenesis and Dark Matter
• Search for dinucleon decay into pions at Super-Kamiokande
• The role of CP violating scatterings in baryogenesis - case study of the neutron portal
• Post-Sphaleron baryogenesis and $n-\bar{n}$ oscillation in non-SUSY SO(10) GUT with gauge coupling unification and proton decay
• Connecting Radiative Neutrino Mass, Neutron-Antineutron Oscillation, Proton Decay, and Leptogenesis through Dark Matter
• LSP baryogenesis and neutron-antineutron oscillations from R-parity violation

Cited by in corpus (23)

• Complete Set of Dimension-9 Operators in the Standard Model Effective Field Theory
• Lattice QCD determination of neutron-antineutron matrix elements with physical quark masses
• New high-sensitivity searches for neutrons converting into antineutrons and/or sterile neutrons at the European Spallation Source
• Neutron-Antineutron Oscillation Search using a 0.37 Megaton$\cdot$Year Exposure of Super-Kamiokande
• Particle Physics at the European Spallation Source
• Baryon-number violation by two units and the deuteron lifetime
• Neutron-antineutron oscillations from lattice QCD
• Progress and Simulations for Intranuclear Neutron--Antineutron Transformations in ${}_{18}^{40}Ar$
• A new operating mode in experiments searching for free neutron-antineutron oscillations based on coherent neutron and antineutron mirror reflections
• Neutron-antineutron oscillations in the deuteron studied with $NN$ and $\bar{N}N$ interactions based on chiral effective field theory
• Direct baryogenesis in the broken phase
• High Energy Sphalerons for Baryogenesis at Low Temperatures
• Theoretical Analysis of Antineutron-Nucleus Data needed for Antineutron Mirrors in Neutron-Antineutron Oscillation Experiments
• Superheavy dark matter from the natural inflation in light of the highest-energy astroparticle events
• Probing a light dark sector at future lepton colliders via invisible decays of the SM-like and dark Higgs bosons
• A new approach to search for free neutron-antineutron oscillations using coherent neutron propagation in gas
• Technique for Surface Background Rejection in Liquid Argon Dark Matter Detectors using Layered Wavelength-Shifting and Scintillating Thin Films
• Spectrum of colour sextet scalars in realistic SO(10) GUT
• Effective Theory for Baryogenesis with a Majorana Fermion Pair Coupled to Quarks
• The Decomposition of Neutron-Antineutron Oscillation Operators
• Baryon Asymmetry from the Decay and Scattering of a Majorana Fermion Pair Coupled to Quarks
• Baryogenesis via relativistic bubble expansion
• Baryogenesis via relativistic bubble walls