{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,22]],"date-time":"2026-02-22T00:08:15Z","timestamp":1771718895622,"version":"3.50.1"},"reference-count":59,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2022,3,8]],"date-time":"2022-03-08T00:00:00Z","timestamp":1646697600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Talent Scientific Research Program of College of Physics, Sichuan University","award":["1082204112427"],"award-info":[{"award-number":["1082204112427"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>We discuss possibilities of generating a Majorana mass for the neutron from topological quantum gravity effects which survive at mesoscopic scales from decoherence. We show how virtual micro-black hole (BH) pairs with skyrme\/baryon hairs induce a neutron\u2013antineutron transition which can be tested in next generation of experiments. Such effects do not destabilize the proton. We also discuss how BHs with mix ordinary and mirror baryon hairs can mediate neutron-mirror neutron mixings.<\/jats:p>","DOI":"10.3390\/sym14030551","type":"journal-article","created":{"date-parts":[[2022,3,9]],"date-time":"2022-03-09T01:50:53Z","timestamp":1646790653000},"page":"551","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Topological Portals from Matter to Antimatter"],"prefix":"10.3390","volume":"14","author":[{"given":"Andrea","family":"Addazi","sequence":"first","affiliation":[{"name":"Center for Theoretical Physics, College of Physical Science and Technology, Sichuan University, Chengdu 610065, China"},{"name":"Laboratori Nazionali di Frascati INFN, Via Enrico Fermi 54, I-00044 Frascati, Italy"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,8]]},"reference":[{"key":"ref_1","first-page":"335","article-title":"Cp violation and baryon asymmetry of the universe","volume":"12","author":"Kuzmin","year":"1970","journal-title":"Pisma Zh. Eksp. Teor. Fiz."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"070501","DOI":"10.1088\/1361-6471\/abf429","article-title":"New high-sensitivity searches for neutrons converting into antineutrons and\/or sterile neutrons at the HIBEAM\/NNBAR experiment at the European Spallation Source","volume":"48","author":"Addazi","year":"2021","journal-title":"J. Phys. G"},{"key":"ref_3","first-page":"216","article-title":"A New experimental limit on neutron-anti-neutron oscillations","volume":"63","author":"Benetti","year":"1994","journal-title":"Z. Phys. C"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.physrep.2015.11.001","article-title":"Neutron\u2013antineutron Oscillations: Theoretical Status and Experimental Prospects","volume":"612","author":"Phillips","year":"2016","journal-title":"Phys. Rept."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"081801","DOI":"10.1103\/PhysRevLett.96.081801","article-title":"Neutron-mirror neutron oscillations: How fast might they be?","volume":"96","author":"Berezhiani","year":"2006","journal-title":"Phys. Rev. Lett."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"421","DOI":"10.1140\/epjc\/s10052-009-1165-1","article-title":"More about neutron-mirror neutron oscillation","volume":"64","author":"Berezhiani","year":"2009","journal-title":"Eur. Phys. J. C"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"153","DOI":"10.1007\/JHEP04(2015)153","article-title":"Exotic vector-like pair? of color-triplet scalars","volume":"1504","author":"Addazi","year":"2015","journal-title":"J. High Energy Phys."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"705","DOI":"10.1140\/epjc\/s10052-016-4564-0","article-title":"Neutron\u2013antineutron oscillation and baryonic majoron: Low scale spontaneous baryon violation","volume":"76","author":"Berezhiani","year":"2016","journal-title":"Eur. Phys. J. C"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"301","DOI":"10.1140\/epjc\/s10052-017-4870-1","article-title":"Gauged B-L number and neutron\u2013antineutron oscillation: Long-range forces mediated by baryophotons","volume":"77","author":"Addazi","year":"2017","journal-title":"Eur. Phys. J. C"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1016\/0370-2693(80)90853-9","article-title":"Phenomenology of neutron oscillations","volume":"94B","author":"Mohapatra","year":"1980","journal-title":"Phys. Lett."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"303","DOI":"10.1016\/0370-2693(87)90299-1","article-title":"Late Baryogenesis in Superstring Models","volume":"186","author":"Mohapatra","year":"1987","journal-title":"Phys. Lett. B"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"115019","DOI":"10.1103\/PhysRevD.87.115019","article-title":"Post-Sphaleron Baryogenesis and an Upper Limit on the Neutron\u2013antineutron Oscillation Time","volume":"87","author":"Babu","year":"2013","journal-title":"Phys. Rev. D"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"131301","DOI":"10.1103\/PhysRevLett.97.131301","article-title":"Post-Sphaleron Baryogenesis","volume":"97","author":"Babu","year":"2006","journal-title":"Phys. Rev. Lett."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"124","DOI":"10.1016\/j.physletb.2005.08.101","article-title":"Some implications of neutron mirror neutron oscillation","volume":"627","author":"Mohapatra","year":"2005","journal-title":"Phys. Lett. B"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2111","DOI":"10.1140\/epjc\/s10052-012-2111-1","article-title":"Neutron Oscillations to Parallel World: Earlier End to the Cosmic Ray Spectrum?","volume":"72","author":"Berezhiani","year":"2012","journal-title":"Eur. Phys. J. C"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"035039","DOI":"10.1103\/PhysRevD.96.035039","article-title":"Neutron Disappearance and Regeneration from Mirror State","volume":"96","author":"Berezhiani","year":"2017","journal-title":"Phys. Rev. D"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1140\/epjc\/s10052-020-08824-9","article-title":"A possible shortcut for neutron\u2013antineutron oscillation through mirror world","volume":"81","author":"Berezhiani","year":"2021","journal-title":"Eur. Phys. J. C"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Babu, K.S., and Mohapatra, R.N. (2021). Theoretical Constraints on Neutron\u2013Mirror-Neutron Oscillation. arXiv.","DOI":"10.3390\/sym14040731"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"912","DOI":"10.1103\/PhysRevD.52.912","article-title":"Gravity and global symmetries","volume":"52","author":"Kallosh","year":"1995","journal-title":"Phys. Rev. D"},{"key":"ref_20","first-page":"60","article-title":"The String landscape, black holes and gravity as the weakest force","volume":"6","author":"Motl","year":"2007","journal-title":"J. High Energy Phys."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"084019","DOI":"10.1103\/PhysRevD.83.084019","article-title":"Symmetries and Strings in Field Theory and Gravity","volume":"83","author":"Banks","year":"2011","journal-title":"Phys. Rev. D"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"191601","DOI":"10.1103\/PhysRevLett.122.191601","article-title":"Constraints on Symmetries from Holography","volume":"122","author":"Harlow","year":"2019","journal-title":"Phys. Rev. Lett."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"535536","DOI":"10.1103\/PhysRevLett.53.535","article-title":"Parity Conservation in Quantum Chromodynamics","volume":"53","author":"Vafa","year":"1984","journal-title":"Phys. Rev. Lett."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"36","DOI":"10.1016\/0370-2693(85)91028-7","article-title":"On anomalous electroweak baryon-number non-conservation in the early universe","volume":"155","author":"Kuzmin","year":"1985","journal-title":"Phys. Lett. B"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"3099","DOI":"10.1103\/PhysRevD.53.3099","article-title":"Virtual black holes","volume":"53","author":"Hawking","year":"1996","journal-title":"Phys. Rev. D"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1016\/0550-3213(78)90375-9","article-title":"Spacetime foam","volume":"144","author":"Hawking","year":"1978","journal-title":"Nucl. Phys. B"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1016\/0550-3213(78)90161-X","article-title":"Path integrals and the indefiniteness of the gravitational action","volume":"138","author":"Gibbons","year":"1978","journal-title":"Nucl. Phys. B Nucl. Phys. B"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"2342","DOI":"10.1103\/PhysRevD.36.2342","article-title":"Conformal rotation in perturbative gravity","volume":"36","author":"Schleich","year":"1987","journal-title":"Phys. Rev. D"},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1750012","DOI":"10.1142\/S0219887817500128","article-title":"More about the Instanton\/Soliton\/Kink correspondence","volume":"14","author":"Addazi","year":"2016","journal-title":"Int. J. Geom. Meth. Mod. Phys."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"085005","DOI":"10.1103\/PhysRevD.77.085005","article-title":"Localization of gauge fields and monopole tunnelling","volume":"77","author":"Dvali","year":"2008","journal-title":"Phys. Rev. D"},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Gibbons, G.W., and Hawking, S.W. (1993). Euclidean Quantum Gravity, World Scientific.","DOI":"10.1142\/1301"},{"key":"ref_32","first-page":"133","article-title":"Meet-ing on \u201cHot hadronic matter: Theory and experiments\u201d","volume":"2","author":"Veneziano","year":"1986","journal-title":"Europhys. Lett."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"092001","DOI":"10.1088\/0264-9381\/30\/9\/092001","article-title":"Quantum hair and the string-black hole correspondence","volume":"30","author":"Veneziano","year":"2013","journal-title":"Class. Quant. Gravity"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"175","DOI":"10.1016\/0550-3213(92)90008-Y","article-title":"Quantum hair on black holes","volume":"378","author":"Coleman","year":"1992","journal-title":"Nucl. Phys. B"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"742","DOI":"10.1002\/prop.201300001","article-title":"Black Hole\u2019s Quantum N-Portrait","volume":"61","author":"Dvali","year":"2013","journal-title":"Fortsch. Phys."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"2150030","DOI":"10.1142\/S0219887821500304","article-title":"Holographic Naturalness and Topological Phase Transitions","volume":"18","author":"Addazi","year":"2021","journal-title":"Int. J. Geom. Meth. Mod. Phys."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"2050007","DOI":"10.1142\/S0219887820500073","article-title":"Conformal Bootstrap in dS\/CFT and Topological Quantum Gravity","volume":"17","author":"Addazi","year":"2020","journal-title":"Int. J. Geom. Methods Mod. Phys."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"2050084","DOI":"10.1142\/S0218271820500844","article-title":"Holographic Naturalness","volume":"29","author":"Addazi","year":"2020","journal-title":"Int. J. Mod. Phys. D"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"940","DOI":"10.1140\/epjp\/s13360-020-00933-4","article-title":"Holographic Naturalness and Cosmological Relaxation","volume":"135","author":"Addazi","year":"2020","journal-title":"Eur. Phys. J. Plus"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"341","DOI":"10.1016\/0370-2693(86)90175-9","article-title":"Black Holes Have Skyrmion Hair","volume":"176","author":"Luckock","year":"1986","journal-title":"Phys. Lett. B"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"371","DOI":"10.1016\/0370-2693(91)91592-J","article-title":"New black hole solutions with hair","volume":"268","author":"Droz","year":"1991","journal-title":"Phys. Lett. B"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1016\/0370-2693(92)91069-L","article-title":"Gravitating skyrmions","volume":"297","author":"Bizon","year":"1992","journal-title":"Phys. Lett. B"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"21","DOI":"10.1016\/0370-2693(92)91294-J","article-title":"Droz, S.; Straumann, N. Linear stability of Einstein Skyrme black holes","volume":"285","author":"Heusler","year":"1992","journal-title":"Phys. Lett. B"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"044038","DOI":"10.1103\/PhysRevD.74.044038","article-title":"Skyrme Black Holes in the Isolated Horizons Formal-ism","volume":"74","author":"Nielsen","year":"2006","journal-title":"Phys. Rev. D"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"274","DOI":"10.1016\/j.physletb.2017.03.004","article-title":"Aharonov\u2013Bohm protection of black hole\u2019s baryon\/skyrmion hair","volume":"768","author":"Dvali","year":"2017","journal-title":"Phys. Lett. B"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"089","DOI":"10.1007\/JHEP12(2014)089","article-title":"Neutron Majorana mass from exotic instantons","volume":"12","author":"Addazi","year":"2014","journal-title":"J. High Energy Phys."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1007\/JHEP07(2015)144","article-title":"Un-oriented quiver theories for Majorana neutrons","volume":"1507","author":"Addazi","year":"2015","journal-title":"J. High Energy Phys."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"462","DOI":"10.1016\/j.physletb.2016.04.018","article-title":"Direct generation of a Majorana mass for the neutron from exotic instantons","volume":"757","author":"Addazi","year":"2016","journal-title":"Phys. Lett. B"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"781","DOI":"10.1002\/prop.201300020","article-title":"Cool horizons for entangled black holes","volume":"61","author":"Maldacena","year":"2013","journal-title":"Fortsch. Phys."},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"Berezhiani, Z. (2005). Through the looking-glass: Alice\u2019s adventures in mirror world. From Fields to Strings: Circumnavigating Theoretical Physics: A Tribute to Ian Kogan, World Scientific.","DOI":"10.1142\/9789812775344_0055"},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"380","DOI":"10.1070\/PU2007v050n04ABEH006227","article-title":"Mirror particles and mirror matter: 50 years of speculations and search","volume":"50","author":"Okun","year":"2007","journal-title":"Phys. Usp."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"427","DOI":"10.1016\/0550-3213(82)90265-6","article-title":"Grand unification and mirror particles","volume":"209","author":"Schwarz","year":"1982","journal-title":"Nucl. Phys. B"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1016\/0550-3213(82)90190-0","article-title":"Field theories with no local conservation of the electric charge","volume":"B 208","author":"Schwarz","year":"1982","journal-title":"Nucl. Phys."},{"key":"ref_54","first-page":"127","article-title":"A Non-Linear Field Theory","volume":"A260","author":"Skyrme","year":"1961","journal-title":"Proc. Roy. Soc. Lond."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"556","DOI":"10.1016\/0029-5582(62)90775-7","article-title":"A unified field theory of mesons and baryons","volume":"31","author":"Skyrme","year":"1962","journal-title":"Nucl. Phys."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"245","DOI":"10.1016\/0550-3213(83)90636-3","article-title":"Semiclassical perdurance of de Sitter space","volume":"222","author":"Ginsparg","year":"1983","journal-title":"Nucl. Phys. B"},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"313","DOI":"10.1016\/S0550-3213(00)00287-X","article-title":"Black hole pair creation in de Sitter space: A complete one-loop analysis","volume":"582","author":"Volkov","year":"2000","journal-title":"Nucl. Phys. B"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"061501","DOI":"10.1103\/PhysRevD.59.061501","article-title":"Possible quantum instability of primordial black holes","volume":"59","author":"Elizalde","year":"1999","journal-title":"Phys. Rev. D"},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"044026","DOI":"10.1103\/PhysRevD.59.044026","article-title":"Quantum evolution of Schwarzschild\u2013De Sitter (Nariai) black holes","volume":"59","author":"Nojiri","year":"1999","journal-title":"Phys. Rev. D"}],"container-title":["Symmetry"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-8994\/14\/3\/551\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T22:34:05Z","timestamp":1760135645000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-8994\/14\/3\/551"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,3,8]]},"references-count":59,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2022,3]]}},"alternative-id":["sym14030551"],"URL":"https:\/\/doi.org\/10.3390\/sym14030551","relation":{},"ISSN":["2073-8994"],"issn-type":[{"value":"2073-8994","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,3,8]]}}}