A possible shortcut for neutron-antineutron oscillation through mirror world

Abstract

Existing bounds on the neutron-antineutron mass mixing, ${\epsilon }_{n\bar{n}}<\mathrm{few}\times 10^{-24}$ eV, impose a severe upper limit on $n-\bar{n}$ transition probability, $P_{n\bar{n}}(t)<(t/0.1\mathrm{s}{)}^2\times 10^{-18}$ or so, where $t$ is the neutron flight time. Here we propose a new mechanism of $n-\bar{n}$ transition which is not induced by direct mass mixing ${\epsilon }_{n\bar{n}}$ but is mediated instead by the neutron mixings with the hypothetical states of mirror neutron $n^{\prime }$ and mirror antineutron ${\bar{n}}^{\prime }$. The latter can be as large as ${\epsilon }_{n{n}^{\prime }},{\epsilon }_{n{\bar{n}}^{\prime }}\sim 10^{-15}$ eV or so, without contradicting present experimental limits and nuclear stability bounds. The probabilities of $n-n^{\prime }$ and $n-{\bar{n}}^{\prime }$ transitions, $P_{n{n}^{\prime }}$ and $P_{n{\bar{n}}^{\prime }}$, depend on environmental conditions in mirror sector, and they can be resonantly amplified by applying the magnetic field of the proper value. This opens up a possibility of $n-\bar{n}$ transition with the probability $P_{n\bar{n}}\simeq P_{n{n}^{\prime }}{P}_{n{\bar{n}}^{\prime }}$ which can reach the values $\sim 10^{-8}$ or even larger. For finding this effect in real experiments, the magnetic field should not be suppressed but properly varied. These mixings can be induced by new physics at the scale of few TeV which may also originate a new low scale co-baryogenesis mechanism between ordinary and mirror sectors.

10 pages

References in corpus (22)

• Mirror particles and mirror matter: 50 years of speculation and search
• Neutron -- Mirror Neutron Oscillation: How Fast Might It Be?
• The CKM unitarity problem: A trace of new physics at the TeV scale?
• Experimental search for neutron - mirror neutron oscillations using storage of ultracold neutrons
• More about neutron - mirror neutron oscillation
• A direct experimental limit on neutron -- mirror neutron oscillations
• Fast Neutron - Mirror Neutron Oscillation and Ultra High Energy Cosmic Rays
• Neutron to Mirror-Neutron Oscillations in the Presence of Mirror Magnetic Fields
• Dark Side of the Neutron?
• Exotic decay channels are not the cause of the neutron lifetime anomaly
• Realistic calculations of nuclear disappearance lifetimes induced by neutron-antineutron oscillations
• A search for neutron to mirror-neutron oscillations
• Neutron - mirror neutron mixing and neutron stars
• Bounds on Neutron- Mirror Neutron Mixing from Pulsar Timings and Gravitational Wave Detections
• Neutron lifetime and dark decay of the neutron and hydrogen
• A new operating mode in experiments searching for free neutron-antineutron oscillations based on coherent neutron and antineutron mirror reflections
• Neutron--Antineutron Oscillations: Discrete Symmetries and Quark Operators
• Constraints on Mirror Models of Dark Matter from Observable Neutron-Mirror Neutron Oscillation
• On the Neutron Transition Magnetic Moment
• New search for mirror neutron regeneration
• Limiting Equivalence Principle Violation and Long-Range Baryonic Force from Neutron-Antineutron Oscillation
• A new approach to search for free neutron-antineutron oscillations using coherent neutron propagation in gas

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• Neutron - mirror neutron mixing and neutron stars
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• Baryon Number Violation: From Nuclear Matrix Elements to BSM Physics
• RG evolution and effect of intermediate new physics on $\Delta B=2$ six-quark operators
• Neutron-Mirror Neutron oscillations in Matter
• Assisted baryon number violation from $4k+2$ dimensions
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