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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2511.01829 |
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| _version_ | 1866912685832011776 |
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| author | Barrow, Joshua L. Fierlinger, Peter Kamyshkov, Yuri Meirose, Bernhard Milstead, David Mohapatra, Rabindra N. Santoro, Valentina |
| author_facet | Barrow, Joshua L. Fierlinger, Peter Kamyshkov, Yuri Meirose, Bernhard Milstead, David Mohapatra, Rabindra N. Santoro, Valentina |
| contents | Experimental searches for neutron--antineutron ($n \rightarrow \bar n$) transitions can be considered via two approaches: conversion in free-neutron beams and intranuclear transformation leading to matter instability in large-mass detectors. Plans for next-generation searches make it timely to highlight the complementarity, necessity, and limitations of each method. Converting the bound neutron limit into one for free neutrons traditionally utilizes nucleus-specific estimates of the in-medium suppression of $n \rightarrow \bar n$, obtained within mean-field theory under a single-operator assumption. This paper highlights how this suppression can be scenario-dependent, which can lead to deviations from the standard approach that can span several orders of magnitude. A further goal of the paper is to point out the need for a broader phenomenology program for $n\rightarrow \bar{n}$ that is akin to those developed for electric dipole moments and other systems for which short-distance new physics must be studied in-medium. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_01829 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Avoiding Blindness in Baryon Number Violating Processes: Free-Beam and Intranuclear Paths to Neutron-Antineutron Transitions Barrow, Joshua L. Fierlinger, Peter Kamyshkov, Yuri Meirose, Bernhard Milstead, David Mohapatra, Rabindra N. Santoro, Valentina High Energy Physics - Phenomenology Experimental searches for neutron--antineutron ($n \rightarrow \bar n$) transitions can be considered via two approaches: conversion in free-neutron beams and intranuclear transformation leading to matter instability in large-mass detectors. Plans for next-generation searches make it timely to highlight the complementarity, necessity, and limitations of each method. Converting the bound neutron limit into one for free neutrons traditionally utilizes nucleus-specific estimates of the in-medium suppression of $n \rightarrow \bar n$, obtained within mean-field theory under a single-operator assumption. This paper highlights how this suppression can be scenario-dependent, which can lead to deviations from the standard approach that can span several orders of magnitude. A further goal of the paper is to point out the need for a broader phenomenology program for $n\rightarrow \bar{n}$ that is akin to those developed for electric dipole moments and other systems for which short-distance new physics must be studied in-medium. |
| title | Avoiding Blindness in Baryon Number Violating Processes: Free-Beam and Intranuclear Paths to Neutron-Antineutron Transitions |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.01829 |