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The International Axion Observatory (IAXO): case, status and plans. Input to the European Strategy for Particle Physics

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Main Authors:	Arcusa, A., Ahyoune, S., Altenmuller, K., Antolin, I., Basso, S., Brun, P., Burwitz, V., Candon, F. R., Castel, J. F., Cebrian, S., Chouhan, D., Della Ceca, R., Cervera-Cortes, M., Civitani, M. M., Cogollos, C., Costa, E., Cotroneo, V., Dafni, T., Desch, K., Diaz-Martin, M. C., Diaz-Morcillo, A., Diez-Ibanez, D., Pardos, C. Diez, Dinter, M., Dobrich, B., Dudarev, A., Ezquerro, A., Fabiani, S., Ferrer-Ribas, E., Finelli, F., Fleck, I., Galan, J., Galanti, G., Galaverni, M., Guarch, J. Galindo, Garcia, J. A., Garcia-Barcelo, J. M., Gastaldo, L., Giannotti, M., Giganon, A., Goblin, C., Goyal, N., Gu, Y., Hagge, L., Helary, L., Hengstler, D., Heuchel, D., Hoof, S., Iglesias-Marzoa, R., Iguaz, F. J., Iglesias, M., Iniguez, C., Irastorza, I. G., Jakovcic, K., Kafer, D., Kaminski, J., Karstensen, S., Law, M., Lindner, A., Loidl, M., Loiseau, C., Lopez-Alegre, G., Lozano-Guerrero, A., Luzon, G., Manthos, I., Margalejo, C., Marin-Franch, A., Marques, J., Marutzky, F., Menneglier, C., Mentink, M., Mertens, S., Miralda-Escude, J., Mirallas, H., Muleri, F., Navarro-Madrid, J. R., Navick, X. F., Nikolopoulos, K., Notari, A., Obis, L., Ortiz-de-Solorzano, A., O'Shea, T., von Oy, J., Pareschi, G., Papaevangelou, T., Perez, K., Perez, O., Picatoste, E., Pivovaroff, M. J., Porron, J., Puyuelo, M. J., Quintana, A., Redondo, J., Reuther, D., Ringwald, A., Rodrigues, M., Rubini, A., Rueda-Teruel, S., Rueda-Teruel, F., Ruiz-Choliz, E., Ruz, J., Schaffran, J., Schiffer, T., Schmidt, S., Schneekloth, U., Schonfeld, L., Schott, M., Segui, L., Singh, U. R., Soffitta, P., Spiga, D., Stern, M., Straniero, O., Tavecchio, F., Vecchi, G., Vogel, J. K., Ward, R., Weltman, A., Wiesinger, C., Wolf, R., Woo, J., Yanes-Diaz, A., Yu, Y.
Format:	Preprint
Published:	2025
Subjects:	High Energy Physics - Phenomenology High Energy Astrophysical Phenomena Solar and Stellar Astrophysics High Energy Physics - Experiment
Online Access:	Acceder al recurso
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_version_	1866915220765540352
author	Arcusa, A. Ahyoune, S. Altenmuller, K. Antolin, I. Basso, S. Brun, P. Burwitz, V. Candon, F. R. Castel, J. F. Cebrian, S. Chouhan, D. Della Ceca, R. Cervera-Cortes, M. Civitani, M. M. Cogollos, C. Costa, E. Cotroneo, V. Dafni, T. Desch, K. Diaz-Martin, M. C. Diaz-Morcillo, A. Diez-Ibanez, D. Pardos, C. Diez Dinter, M. Dobrich, B. Dudarev, A. Ezquerro, A. Fabiani, S. Ferrer-Ribas, E. Finelli, F. Fleck, I. Galan, J. Galanti, G. Galaverni, M. Guarch, J. Galindo Garcia, J. A. Garcia-Barcelo, J. M. Gastaldo, L. Giannotti, M. Giganon, A. Goblin, C. Goyal, N. Gu, Y. Hagge, L. Helary, L. Hengstler, D. Heuchel, D. Hoof, S. Iglesias-Marzoa, R. Iguaz, F. J. Iglesias, M. Iniguez, C. Irastorza, I. G. Jakovcic, K. Kafer, D. Kaminski, J. Karstensen, S. Law, M. Lindner, A. Loidl, M. Loiseau, C. Lopez-Alegre, G. Lozano-Guerrero, A. Luzon, G. Manthos, I. Margalejo, C. Marin-Franch, A. Marques, J. Marutzky, F. Menneglier, C. Mentink, M. Mertens, S. Miralda-Escude, J. Mirallas, H. Muleri, F. Navarro-Madrid, J. R. Navick, X. F. Nikolopoulos, K. Notari, A. Obis, L. Ortiz-de-Solorzano, A. O'Shea, T. von Oy, J. Pareschi, G. Papaevangelou, T. Perez, K. Perez, O. Picatoste, E. Pivovaroff, M. J. Porron, J. Puyuelo, M. J. Quintana, A. Redondo, J. Reuther, D. Ringwald, A. Rodrigues, M. Rubini, A. Rueda-Teruel, S. Rueda-Teruel, F. Ruiz-Choliz, E. Ruz, J. Schaffran, J. Schiffer, T. Schmidt, S. Schneekloth, U. Schonfeld, L. Schott, M. Segui, L. Singh, U. R. Soffitta, P. Spiga, D. Stern, M. Straniero, O. Tavecchio, F. Vecchi, G. Vogel, J. K. Ward, R. Weltman, A. Wiesinger, C. Wolf, R. Woo, J. Yanes-Diaz, A. Yu, Y.
author_facet	Arcusa, A. Ahyoune, S. Altenmuller, K. Antolin, I. Basso, S. Brun, P. Burwitz, V. Candon, F. R. Castel, J. F. Cebrian, S. Chouhan, D. Della Ceca, R. Cervera-Cortes, M. Civitani, M. M. Cogollos, C. Costa, E. Cotroneo, V. Dafni, T. Desch, K. Diaz-Martin, M. C. Diaz-Morcillo, A. Diez-Ibanez, D. Pardos, C. Diez Dinter, M. Dobrich, B. Dudarev, A. Ezquerro, A. Fabiani, S. Ferrer-Ribas, E. Finelli, F. Fleck, I. Galan, J. Galanti, G. Galaverni, M. Guarch, J. Galindo Garcia, J. A. Garcia-Barcelo, J. M. Gastaldo, L. Giannotti, M. Giganon, A. Goblin, C. Goyal, N. Gu, Y. Hagge, L. Helary, L. Hengstler, D. Heuchel, D. Hoof, S. Iglesias-Marzoa, R. Iguaz, F. J. Iglesias, M. Iniguez, C. Irastorza, I. G. Jakovcic, K. Kafer, D. Kaminski, J. Karstensen, S. Law, M. Lindner, A. Loidl, M. Loiseau, C. Lopez-Alegre, G. Lozano-Guerrero, A. Luzon, G. Manthos, I. Margalejo, C. Marin-Franch, A. Marques, J. Marutzky, F. Menneglier, C. Mentink, M. Mertens, S. Miralda-Escude, J. Mirallas, H. Muleri, F. Navarro-Madrid, J. R. Navick, X. F. Nikolopoulos, K. Notari, A. Obis, L. Ortiz-de-Solorzano, A. O'Shea, T. von Oy, J. Pareschi, G. Papaevangelou, T. Perez, K. Perez, O. Picatoste, E. Pivovaroff, M. J. Porron, J. Puyuelo, M. J. Quintana, A. Redondo, J. Reuther, D. Ringwald, A. Rodrigues, M. Rubini, A. Rueda-Teruel, S. Rueda-Teruel, F. Ruiz-Choliz, E. Ruz, J. Schaffran, J. Schiffer, T. Schmidt, S. Schneekloth, U. Schonfeld, L. Schott, M. Segui, L. Singh, U. R. Soffitta, P. Spiga, D. Stern, M. Straniero, O. Tavecchio, F. Vecchi, G. Vogel, J. K. Ward, R. Weltman, A. Wiesinger, C. Wolf, R. Woo, J. Yanes-Diaz, A. Yu, Y.
contents	The International Axion Observatory (IAXO) is a next-generation axion helioscope designed to search for solar axions with unprecedented sensitivity. IAXO holds a unique position in the global landscape of axion searches, as it will probe a region of the axion parameter space inaccessible to any other experiment. In particular, it will explore QCD axion models in the mass range from meV to eV, covering scenarios motivated by astrophysical observations and potentially extending to axion dark matter models. Several studies in recent years have demonstrated that IAXO has the potential to probe a wide range of new physics beyond solar axions, including dark photons, chameleons, gravitational waves, and axions from nearby supernovae. IAXO will build upon the two-decade experience gained with CAST, the detailed studies for BabyIAXO, which is currently under construction, as well as new technologies. If, in contrast to expectations, solar axion searches with IAXO ``only'' result in limits on new physics in presently uncharted parameter territory, these exclusions would be very robust and provide significant constraints on models, as they would not depend on untestable cosmological assumptions.
format	Preprint
id	arxiv_https___arxiv_org_abs_2504_00079
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	The International Axion Observatory (IAXO): case, status and plans. Input to the European Strategy for Particle Physics Arcusa, A. Ahyoune, S. Altenmuller, K. Antolin, I. Basso, S. Brun, P. Burwitz, V. Candon, F. R. Castel, J. F. Cebrian, S. Chouhan, D. Della Ceca, R. Cervera-Cortes, M. Civitani, M. M. Cogollos, C. Costa, E. Cotroneo, V. Dafni, T. Desch, K. Diaz-Martin, M. C. Diaz-Morcillo, A. Diez-Ibanez, D. Pardos, C. Diez Dinter, M. Dobrich, B. Dudarev, A. Ezquerro, A. Fabiani, S. Ferrer-Ribas, E. Finelli, F. Fleck, I. Galan, J. Galanti, G. Galaverni, M. Guarch, J. Galindo Garcia, J. A. Garcia-Barcelo, J. M. Gastaldo, L. Giannotti, M. Giganon, A. Goblin, C. Goyal, N. Gu, Y. Hagge, L. Helary, L. Hengstler, D. Heuchel, D. Hoof, S. Iglesias-Marzoa, R. Iguaz, F. J. Iglesias, M. Iniguez, C. Irastorza, I. G. Jakovcic, K. Kafer, D. Kaminski, J. Karstensen, S. Law, M. Lindner, A. Loidl, M. Loiseau, C. Lopez-Alegre, G. Lozano-Guerrero, A. Luzon, G. Manthos, I. Margalejo, C. Marin-Franch, A. Marques, J. Marutzky, F. Menneglier, C. Mentink, M. Mertens, S. Miralda-Escude, J. Mirallas, H. Muleri, F. Navarro-Madrid, J. R. Navick, X. F. Nikolopoulos, K. Notari, A. Obis, L. Ortiz-de-Solorzano, A. O'Shea, T. von Oy, J. Pareschi, G. Papaevangelou, T. Perez, K. Perez, O. Picatoste, E. Pivovaroff, M. J. Porron, J. Puyuelo, M. J. Quintana, A. Redondo, J. Reuther, D. Ringwald, A. Rodrigues, M. Rubini, A. Rueda-Teruel, S. Rueda-Teruel, F. Ruiz-Choliz, E. Ruz, J. Schaffran, J. Schiffer, T. Schmidt, S. Schneekloth, U. Schonfeld, L. Schott, M. Segui, L. Singh, U. R. Soffitta, P. Spiga, D. Stern, M. Straniero, O. Tavecchio, F. Vecchi, G. Vogel, J. K. Ward, R. Weltman, A. Wiesinger, C. Wolf, R. Woo, J. Yanes-Diaz, A. Yu, Y. High Energy Physics - Phenomenology High Energy Astrophysical Phenomena Solar and Stellar Astrophysics High Energy Physics - Experiment The International Axion Observatory (IAXO) is a next-generation axion helioscope designed to search for solar axions with unprecedented sensitivity. IAXO holds a unique position in the global landscape of axion searches, as it will probe a region of the axion parameter space inaccessible to any other experiment. In particular, it will explore QCD axion models in the mass range from meV to eV, covering scenarios motivated by astrophysical observations and potentially extending to axion dark matter models. Several studies in recent years have demonstrated that IAXO has the potential to probe a wide range of new physics beyond solar axions, including dark photons, chameleons, gravitational waves, and axions from nearby supernovae. IAXO will build upon the two-decade experience gained with CAST, the detailed studies for BabyIAXO, which is currently under construction, as well as new technologies. If, in contrast to expectations, solar axion searches with IAXO ``only'' result in limits on new physics in presently uncharted parameter territory, these exclusions would be very robust and provide significant constraints on models, as they would not depend on untestable cosmological assumptions.
title	The International Axion Observatory (IAXO): case, status and plans. Input to the European Strategy for Particle Physics
topic	High Energy Physics - Phenomenology High Energy Astrophysical Phenomena Solar and Stellar Astrophysics High Energy Physics - Experiment
url	https://arxiv.org/abs/2504.00079