000056314 001__ 56314 000056314 005__ 20210121114541.0 000056314 0247_ $$2doi$$a10.1146/annurev-nucl-102014-022120 000056314 0248_ $$2sideral$$a92813 000056314 037__ $$aART-2015-92813 000056314 041__ $$aeng 000056314 100__ $$aGraham, P.W. 000056314 245__ $$aExperimental Searches for the Axion and Axion-Like Particles 000056314 260__ $$c2015 000056314 5060_ $$aAccess copy available to the general public$$fUnrestricted 000056314 5203_ $$aFour decades after its prediction, the axion remains the most compelling solution to the strong-CP problem and a well-motivated dark matter candidate, inspiring a host of elegant and ultrasensitive experiments based on axion-photon mixing. This article reviews the experimental situation on several fronts. The microwave cavity experiment is making excellent progress in the search for dark matter axions in the µeV range and may plausibly be extended up to 100 µeV. Within the past several years, however, researchers have realized that axions are pervasive throughout string theories, but with masses that fall naturally in the neV range, for which an NMR-based search is under development. Both searches for axions emitted from the Sun's burning core and purely laboratory experiments based on photon regeneration have recently made great progress, with ambitious projects proposed for the coming decade. Each of these campaigns has pushed the state of the art in technology, enabling large gains in sensitivity and mass reach. Furthermore, each modality has been exploited in order to search for more generalized axion-like particles, which we also discuss in this review. We are hopeful, even optimistic, that the next review of the subject will concern the discovery of the axion, its properties, and its exploitation as a probe of early universe cosmology and structure formation. 000056314 536__ $$9info:eu-repo/grantAgreement/EC/FP7/ 240054/EU/Novel Developments in Time Projection Chambers (TPCs) for Rare Event Searches in Underground Astroparticle EXperiments/TREX$$9info:eu-repo/grantAgreement/EUR/ERC-PHY-1316706$$9info:eu-repo/grantAgreement/EUR/ERC-PHY-1306729$$9info:eu-repo/grantAgreement/EUR/ERC-PHY-1067242 000056314 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/ 000056314 590__ $$a7.5$$b2015 000056314 591__ $$aPHYSICS, PARTICLES & FIELDS$$b3 / 28 = 0.107$$c2015$$dQ1$$eT1 000056314 591__ $$aPHYSICS, NUCLEAR$$b2 / 21 = 0.095$$c2015$$dQ1$$eT1 000056314 592__ $$a5.823$$b2015 000056314 593__ $$aNuclear and High Energy Physics$$c2015$$dQ1 000056314 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/submittedVersion 000056314 700__ $$0(orcid)0000-0003-1163-1687$$aIrastorza, I.G.$$uUniversidad de Zaragoza 000056314 700__ $$aLamoreaux, S.K. 000056314 700__ $$aLindner, A. 000056314 700__ $$aVan Bibber, K.A. 000056314 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Atóm.Molec.y Nucl. 000056314 773__ $$g65, 1 (2015), 485-514$$pAnnu. rev. nucl. part. sci.$$tANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE$$x0163-8998 000056314 8564_ $$s1658181$$uhttps://zaguan.unizar.es/record/56314/files/texto_completo.pdf$$yPreprint 000056314 8564_ $$s56356$$uhttps://zaguan.unizar.es/record/56314/files/texto_completo.jpg?subformat=icon$$xicon$$yPreprint 000056314 909CO $$ooai:zaguan.unizar.es:56314$$particulos$$pdriver 000056314 951__ $$a2021-01-21-11:16:26 000056314 980__ $$aARTICLE