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Yuan, D. Cinabro, D. Dutta, D. H. Kah, D. M. Asner, D. Matvienko, D. Santel, D. Semmler, D. Y. Kim, E. Kato, E. Nakano, E. Panzenbock, E. Solovieva, E. Won, F. Simon, G. Bonvicini, G. Pakhlova, G. Schnell, G. Tatishvili, G. Varner, H. Aihara, H. Farhat, H. Hayashii, H. J. Hyun, H. J. Kim, H. Kichimi, H. K. Park, H. Miyata, H. Nakazawa, H. O. Kim, H. Park, H. Sahoo, I. Adachi, I. Jaegle, J. B. Kim, J. Dalseno, J. E. Fast, J.-G. Shiu, J. Haba, J. H. Kang, J. H. Kim, J. Klucar, J. Libby, J. S. Lange, K. Chilikin, K. Cho, K. E. Varvell, K. Hayasaka, K. Kinoshita, K. Miyabayashi, K. M. Williams, K. Sakai, K. Senyo, K. Tanida, K. Trabelsi, L. E. Piilonen, L. Santelj, M. Bra\\v{c}ko, M.-C. Chang, M. Danilov, M. E. Sevior, M. Feindt, M. J. Kim, M. Nakao, M. Nayak, M. N. Wagner, M. Petri\\v{c}, M. Ritter, M. Rohrken, M. Shapkin, M. Stari\\v{c}, M. Steder, M. Uchida, M. Watanabe, M.-Z. Wang, N. Gabyshev, N. K. Nisar, O. Nitoh, O. Schneider, O. Seon, P. Kody\\v{s}, P. Kri\\v{z}an, P. Krokovny, P. Lukin, P. Urquijo, P. Vanhoefer, P. Wang, R. Chistov, R. Gillard, R. Itoh, R. Mizuk, R. Pestotnik, S. Eidelman, S. Esen, S. Ganguly, S.-H. Lee, S.-K. Choi, S. Korpar, S. Nishida, S. Ogawa, S. Okuno, S. Ryu, S. Sandilya, S. Stanic, S. Uehara, S. Uno, S. Yashchenko, T.-A. Shibata, T. Aushev, T. E. Browder, T. Ferber, T. Hara, T. Higuchi, T. Iijima, T. Julius, T. Kawasaki, T. K. Pedlar, T. Kuhr, T. Kumita, T. Mori, T. Saito, T. Sanuki, T. Sumiyoshi, T. Tsuboyama, U. Tamponi, V. Bhardwaj, V. Chobanova, V. Gaur, V. Savinov, V. Vorobyev, V. Zhilich, W.-S. Hou, X. L. Wang, Y. Choi, Y. Horii, Y. Hoshi, Y. Iwasaki, Y. J. Kim, Y.-J. Kwon, Y. Li, Y. Liu, Y. M. Goh, Y. Nagasaka, Y. Sakai, Y.-S. Sohn, Y. Teramoto, Y. Unno, Y. Watanabe, Y. Yamashita, Y. Yook, Z. Dole\\v{z}al, Z. Dr\\'asal, Z. Natkaniec, Z. P. Zhang","submitted_at":"2013-10-10T05:03:12Z","abstract_excerpt":"We report an observation of the $B^{\\pm} \\to J/\\psi \\eta K^{\\pm}$ and $B^0 \\to J/\\psi \\eta K^0_S$ decays using 772$\\times 10^{6}$ $B\\bar{B}$ pairs collected at the $\\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We obtain the branching fractions ${\\cal B}(B^{\\pm}\\rightarrow J/\\psi\\eta K^{\\pm})=(1.27\\pm 0.11{\\rm (stat.)\\pm 0.11{\\rm (syst.)})}\\times10^{-4}$ and ${\\cal B}(B^0\\to J/\\psi \\eta K^0_S)=(5.22 \\pm 0.78 {\\rm(stat.)} \\pm 0.49{\\rm(syst.)})\\times10^{-5}$. We search for a new narrow charmonium(-like) state $X$ in the $J/\\psi \\eta$ mass spectr"},"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":"1310.2704","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2013-10-10T05:03:12Z","cross_cats_sorted":[],"title_canon_sha256":"6892b11b515373ebccd1e6bebc191447bcbde452fd75f7ce56fbcee36d178f16","abstract_canon_sha256":"499250f37cbdb21b0f4d4ed003096c5c21c7f8ca40e0143840db09601923b397"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:52:34.397954Z","signature_b64":"VxzPK6vKGljp9R28Pda+GwNkowPEJPOSmFNuCBOjYsI8K1CYe9aYpqijscg0wjorGAFNUeI0so9T8DU2LaDbDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"78691ee4fd3a8c93ca14643f657c0b729a503fda8587445ebb48de0da6978100","last_reissued_at":"2026-05-18T02:52:34.397328Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:52:34.397328Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Measurement of branching fractions for B \\to J/\\psi \\eta K decays and search for a narrow resonance in the J/\\psi \\eta final state","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Bala, A. Bozek, A. Chen, A. Frey, A. Ishikawa, A. Kuzmin, A. M. Bakich, A. Moll, A. Rostomyan, A. Sibidanov, A. Sokolov, A. Vossen, A. Zupanc, B. Bhuyan, B. D. Yabsley, Belle Collaboration: T. Iwashita, B. G. Cheon, B. Golob, B. R. Ko, B. Shwartz, C. H. Wang, C. Kiesling, C. Liu, C. Ng, C. P. Shen, C. Schwanda, C. Z. Yuan, D. Cinabro, D. Dutta, D. H. Kah, D. M. Asner, D. Matvienko, D. Santel, D. Semmler, D. Y. Kim, E. Kato, E. Nakano, E. Panzenbock, E. Solovieva, E. Won, F. Simon, G. Bonvicini, G. Pakhlova, G. Schnell, G. Tatishvili, G. Varner, H. Aihara, H. Farhat, H. Hayashii, H. J. Hyun, H. J. Kim, H. Kichimi, H. K. Park, H. Miyata, H. Nakazawa, H. O. Kim, H. Park, H. Sahoo, I. Adachi, I. Jaegle, J. B. Kim, J. Dalseno, J. E. Fast, J.-G. Shiu, J. Haba, J. H. Kang, J. H. Kim, J. Klucar, J. Libby, J. S. Lange, K. Chilikin, K. Cho, K. E. Varvell, K. Hayasaka, K. Kinoshita, K. Miyabayashi, K. M. Williams, K. Sakai, K. Senyo, K. Tanida, K. Trabelsi, L. E. Piilonen, L. Santelj, M. Bra\\v{c}ko, M.-C. Chang, M. Danilov, M. E. Sevior, M. Feindt, M. J. Kim, M. Nakao, M. Nayak, M. N. Wagner, M. Petri\\v{c}, M. Ritter, M. Rohrken, M. Shapkin, M. Stari\\v{c}, M. Steder, M. Uchida, M. Watanabe, M.-Z. Wang, N. Gabyshev, N. K. Nisar, O. Nitoh, O. Schneider, O. Seon, P. Kody\\v{s}, P. Kri\\v{z}an, P. Krokovny, P. Lukin, P. Urquijo, P. Vanhoefer, P. Wang, R. Chistov, R. Gillard, R. Itoh, R. Mizuk, R. Pestotnik, S. Eidelman, S. Esen, S. Ganguly, S.-H. Lee, S.-K. Choi, S. Korpar, S. Nishida, S. Ogawa, S. Okuno, S. Ryu, S. Sandilya, S. Stanic, S. Uehara, S. Uno, S. Yashchenko, T.-A. Shibata, T. Aushev, T. E. Browder, T. Ferber, T. Hara, T. Higuchi, T. Iijima, T. Julius, T. Kawasaki, T. K. Pedlar, T. Kuhr, T. Kumita, T. Mori, T. Saito, T. Sanuki, T. Sumiyoshi, T. Tsuboyama, U. Tamponi, V. Bhardwaj, V. Chobanova, V. Gaur, V. Savinov, V. Vorobyev, V. Zhilich, W.-S. Hou, X. L. Wang, Y. Choi, Y. Horii, Y. Hoshi, Y. Iwasaki, Y. J. Kim, Y.-J. Kwon, Y. Li, Y. Liu, Y. M. Goh, Y. Nagasaka, Y. Sakai, Y.-S. Sohn, Y. Teramoto, Y. Unno, Y. Watanabe, Y. Yamashita, Y. Yook, Z. Dole\\v{z}al, Z. Dr\\'asal, Z. Natkaniec, Z. P. Zhang","submitted_at":"2013-10-10T05:03:12Z","abstract_excerpt":"We report an observation of the $B^{\\pm} \\to J/\\psi \\eta K^{\\pm}$ and $B^0 \\to J/\\psi \\eta K^0_S$ decays using 772$\\times 10^{6}$ $B\\bar{B}$ pairs collected at the $\\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We obtain the branching fractions ${\\cal B}(B^{\\pm}\\rightarrow J/\\psi\\eta K^{\\pm})=(1.27\\pm 0.11{\\rm (stat.)\\pm 0.11{\\rm (syst.)})}\\times10^{-4}$ and ${\\cal B}(B^0\\to J/\\psi \\eta K^0_S)=(5.22 \\pm 0.78 {\\rm(stat.)} \\pm 0.49{\\rm(syst.)})\\times10^{-5}$. 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