{"paper":{"title":"Compression-mode resonances in the calcium isotopes and implications for the asymmetry term in nuclear incompressibility","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"Anna Nakagawa, Hidetoshi Akimune, Kazuya Kitamura, Kento Inaba, Kevin B. Howard, Kyoko Nosaka, Mamoru Fujiwara, Masatoshi Itoh, Muhsin N. Harakeh, Nasser Kalantar-Nayestanaki, Nobuyuki Kobayashi, Shinsuke Ota, Shintaro Okamoto, Shoken Nakamura, Shoutaro Kawashima, Shunya Ishida, Sierra Weyhmiller, Soumya Bagchi, Takahiro Kawabata, Takanobu Doi, Tatsuya Furuno, Umesh Garg, Yohei Matsuda, Yuki Fujikawa, Yuto Hijikata, Zaihong Yang","submitted_at":"2019-11-13T03:06:21Z","abstract_excerpt":"Recent data on isoscalar giant monopole resonance (ISGMR) in the calcium isotopes $^{40,44,48}$Ca have suggested that $K_\\tau$, the asymmetry term in the nuclear incompressibility, has a positive value. A value of $K_\\tau > 0$ is entirely incompatible with present theoretical frameworks and, if correct, would have far-reaching implications on our understanding of myriad nuclear and astrophysical phenomena. This paper presents results of an independent ISGMR measurement with the $^{40,42,44,48}$Ca($\\alpha,\\alpha^\\prime$) reaction at $E_\\alpha = 386$ MeV. These results conclusively discount the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.05267","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.05267/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}