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Van Hulse, D. Cinabro, D. Epifanov, D. Getzkow, D. Joffe, D. M. Asner, D. Matvienko, D. Semmler, D. \\v{C}ervenkov, D. Y. Kim, E. Barberio, E. Kato, E. Nakano, E. Ribe\\v{z}l, E. Won, F. Simon, G. B. Mohanty, G. Bonvicini, G. Pakhlova, G. Schnell, G. Varner, H. Aihara, H. Atmacan, H. Farhat, H. Hayashii, H. J. Kim, H. Kichimi, H. Miyata, H. Park, I. Badhrees, I. Jaegle, J. Biswal, J. E. Fast, J.-G. Shiu, J. Haba, J. H. Kim, J. Libby, J. S. Lange, J. Stypula, J. Yamaoka, K. Arinstein, K. Cho, K. Hayasaka, K. Inami, K. Kinoshita, K. Miyabayashi, K. M. Williams, K. Senyo, K. Tanida, K. T. Kim, K. Trabelsi, L. E. Piilonen, L. Pes\\'antez, L. Santelj, M. Bra\\v{c}ko, M. Danilov, M. E. Sevior, M. Nakao, M. Nayak, M. N. Wagner, M. Petri\\v{r}c, M. Ritter, M. Shapkin, M. Stari\\v{c}, M. Steder, M. T. Hedges, M. Uchida, M.-Z. Wang, N. Gabyshev, N. K. Nisar, O. Schneider, P. Katrenko, P. Kody\\v{s}, P. Kri\\v{z}an, P. Krokovny, P. Lewis, P. Lukin, P. Urquijo, P. Vanhoefer, R. Ayad, R. Gillard, R. Mizuk, R. Mussa, R. Pestotnik, S. Eidelman, S. H. Kim, S.-K. Choi, S. Korpar, S. L. Olsen, S. Nishida, S. Ogawa, S. Okuno, S. Ryu, S. Sandilya, S. Uno, S. Yashchenko, T.-A. Shibata, T. Aushev, T. E. Browder, T. Ferber, The Belle Collaboration: U. Tamponi, T. Iijima, T. Julius, T. K. Pedlar, T. Kumita, T. Mori, T. Nanut, T. Sanuki, T. Uglov, V. Bhardwaj, V. Chobanova, V. Gaur, V. Savinov, V. Shebalin, V. Zhilich, V. Zhulanov, W. Ostrowicz, W.-S. Hou, X. H. He, X. L. Wang, Y. Choi, Y. M. Goh, Y. Sakai, Y. Sato, Y.-S. Sohn, Y. Teramoto, Y. Unno, Y. Watanabe, Z. Dole\\v{z}al, Z. Dr\\'asal, Z. Natkaniec, Z. P. Zhang","submitted_at":"2015-06-30T01:42:59Z","abstract_excerpt":"Using a sample of $771.6 \\times 10^{6}$ $\\Upsilon(4S)$ decays collected by the Belle experiment at the KEKB $e^+e^-$ collider, we observe for the first time the transition $\\Upsilon(4S) \\to \\eta h_b(1P)$ with the branching fraction ${\\cal B}[\\Upsilon(4S) \\to \\eta h_b(1P)]= (2.18 \\pm 0.11 \\pm 0.18) \\times 10^{-3}$ and we measure the $h_b(1P)$ mass $M_{h_{b}(1P)} = (9899.3 \\pm 0.4 \\pm 1.0)$ MeV/$c^{2}$, corresponding to the hyperfine splitting $\\Delta M_{\\mathrm HF}(1P) = (0.6 \\pm 0.4 \\pm 1.0)$ MeV/$c^{2}$. Using the transition $h_b(1P) \\to \\gamma \\eta_b(1S)$, we measure the $\\eta_b(1S)$ mass $M"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1506.08914","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2015-06-30T01:42:59Z","cross_cats_sorted":[],"title_canon_sha256":"7ac2e5e651a7dbe548fdfe5065e7f7376b8c7491bcc983188b028f7065d948c5","abstract_canon_sha256":"5b68dcf419c99a352d991f56442265588a44d40b6ea14dba034ca7036d2e150a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:30:56.050599Z","signature_b64":"lvltxuEGwmpmB9HsGe/BoWeLQuNCHg2Z1TMQM3+GhL/HFOzOPgP2ED8F51QI77VRAWLUw1OXFFsumPhUxHmWDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1e7d7871852908dc2c86c5205dbf335a0641f283ce06b99368e2041d22af41c8","last_reissued_at":"2026-05-18T01:30:56.050121Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:30:56.050121Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"First observation of the hadronic transition $ \\Upsilon(4S) \\to \\eta h_{b}(1P)$ and new measurement of the $h_b(1P)$ and $\\eta_b(1S)$ parameters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Abdesselam, A. Bondar, A. Bozek, A. Chen, A. Drutskoy, A. Garmash, A. Ishikawa, A. Kuzmin, A. M. Bakich, A. Moll, A. Rostomyan, A. Sibidanov, A. Sokolov, A. Vinokurova, A. Vossen, A. Zupanc, B. Bhuyan, B. G. Cheon, B. G. Fulsom, B. Golob, B. Pal, B. Shwartz, C. Kiesling, C. Oswald, C. P. Shen, C. Schwanda, C. Van Hulse, D. Cinabro, D. Epifanov, D. Getzkow, D. Joffe, D. M. Asner, D. Matvienko, D. Semmler, D. \\v{C}ervenkov, D. Y. Kim, E. Barberio, E. Kato, E. Nakano, E. Ribe\\v{z}l, E. Won, F. Simon, G. B. Mohanty, G. Bonvicini, G. Pakhlova, G. Schnell, G. Varner, H. Aihara, H. Atmacan, H. Farhat, H. Hayashii, H. J. Kim, H. Kichimi, H. Miyata, H. Park, I. Badhrees, I. Jaegle, J. Biswal, J. E. Fast, J.-G. Shiu, J. Haba, J. H. Kim, J. Libby, J. S. Lange, J. Stypula, J. Yamaoka, K. Arinstein, K. Cho, K. Hayasaka, K. Inami, K. Kinoshita, K. Miyabayashi, K. M. Williams, K. Senyo, K. Tanida, K. T. Kim, K. Trabelsi, L. E. Piilonen, L. Pes\\'antez, L. Santelj, M. Bra\\v{c}ko, M. Danilov, M. E. Sevior, M. Nakao, M. Nayak, M. N. Wagner, M. Petri\\v{r}c, M. Ritter, M. Shapkin, M. Stari\\v{c}, M. Steder, M. T. Hedges, M. Uchida, M.-Z. Wang, N. Gabyshev, N. K. Nisar, O. Schneider, P. Katrenko, P. Kody\\v{s}, P. Kri\\v{z}an, P. Krokovny, P. Lewis, P. Lukin, P. Urquijo, P. Vanhoefer, R. Ayad, R. Gillard, R. Mizuk, R. Mussa, R. Pestotnik, S. Eidelman, S. H. Kim, S.-K. Choi, S. Korpar, S. L. Olsen, S. Nishida, S. Ogawa, S. Okuno, S. Ryu, S. Sandilya, S. Uno, S. Yashchenko, T.-A. Shibata, T. Aushev, T. E. Browder, T. Ferber, The Belle Collaboration: U. Tamponi, T. Iijima, T. Julius, T. K. Pedlar, T. Kumita, T. Mori, T. Nanut, T. Sanuki, T. Uglov, V. Bhardwaj, V. Chobanova, V. Gaur, V. Savinov, V. Shebalin, V. Zhilich, V. Zhulanov, W. Ostrowicz, W.-S. Hou, X. H. He, X. L. Wang, Y. Choi, Y. M. Goh, Y. Sakai, Y. Sato, Y.-S. Sohn, Y. Teramoto, Y. Unno, Y. Watanabe, Z. Dole\\v{z}al, Z. Dr\\'asal, Z. Natkaniec, Z. P. Zhang","submitted_at":"2015-06-30T01:42:59Z","abstract_excerpt":"Using a sample of $771.6 \\times 10^{6}$ $\\Upsilon(4S)$ decays collected by the Belle experiment at the KEKB $e^+e^-$ collider, we observe for the first time the transition $\\Upsilon(4S) \\to \\eta h_b(1P)$ with the branching fraction ${\\cal B}[\\Upsilon(4S) \\to \\eta h_b(1P)]= (2.18 \\pm 0.11 \\pm 0.18) \\times 10^{-3}$ and we measure the $h_b(1P)$ mass $M_{h_{b}(1P)} = (9899.3 \\pm 0.4 \\pm 1.0)$ MeV/$c^{2}$, corresponding to the hyperfine splitting $\\Delta M_{\\mathrm HF}(1P) = (0.6 \\pm 0.4 \\pm 1.0)$ MeV/$c^{2}$. 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