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Cabass, Giovanni; Philcox, Oliver H. E.; Ivanov, Mikhail M.; Akitsu, Kazuyuki; Chen, Shi-Fan; Simonović, Marko; Zaldarriaga, Matias (2025) BOSS constraints on massive particles during inflation: The cosmological collider in action. Physical Review D - Particles, Fields, Gravitation and Cosmology . ISSN 2470-0010