000151225 001__ 151225 000151225 005__ 20251017144642.0 000151225 0247_ $$2doi$$a10.1103/PhysRevD.111.043021 000151225 0248_ $$2sideral$$a143019 000151225 037__ $$aART-2025-143019 000151225 041__ $$aeng 000151225 100__ $$aArias-Aragón, Fernando 000151225 245__ $$aAxion-induced pair production: A new strategy for axion detection 000151225 260__ $$c2025 000151225 5060_ $$aAccess copy available to the general public$$fUnrestricted 000151225 5203_ $$aWe revisit and update the axion-induced pair production process in a nuclear electric field mediated by the axion-electron coupling, a+XZA→XZA+e++e−. This process emerges as one of the most efficient channels for detecting axions with energies above a few MeV in large underground detectors. It is particularly relevant for detecting axions produced in nuclear reactions, such as the p+d→He3+a(5.5 MeV) reaction in the solar pp-chain, and for axions originating in supernovae. Despite recent interest in detecting high-energy axions, the pair production process has received limited attention, even in scenarios where it is the dominant detection channel. This study fills this gap by demonstrating that pair production is a highly effective detection mechanism for high-energy axions. We apply our results to axions from supernovae and the solar 5.5 MeV line, recasting the current bounds of Borexino and comparing the detection capabilities of the JUNO and Hyper-Kamiokande detectors. 000151225 536__ $$9info:eu-repo/grantAgreement/EUR/ERC-2017-AdG-788781$$9info:eu-repo/grantAgreement/ES/MICINN/PGC2022-126078NB-C21$$9info:eu-repo/grantAgreement/ES/MICINN/PID2019-108122GB-C31 000151225 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es 000151225 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000151225 700__ $$0(orcid)0000-0001-9823-6262$$aGiannotti, Maurizio$$uUniversidad de Zaragoza 000151225 700__ $$aGrilli di Cortona, Giovanni 000151225 700__ $$aMescia, Federico 000151225 7102_ $$12004$$2038$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Astronomía y Astrofísica 000151225 773__ $$g111, 4 (2025), 043021 [13 pp.]$$pPhys. rev. D$$tPhysical Review D$$x2470-0010 000151225 8564_ $$s1387435$$uhttps://zaguan.unizar.es/record/151225/files/texto_completo.pdf$$yVersión publicada 000151225 8564_ $$s2831289$$uhttps://zaguan.unizar.es/record/151225/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000151225 909CO $$ooai:zaguan.unizar.es:151225$$particulos$$pdriver 000151225 951__ $$a2025-10-17-14:32:33 000151225 980__ $$aARTICLE