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arXiv · 1803.03225

Inclusive study of bottomonium production in association with an $\eta$ meson in $e^+e^-$ annihilations near $\Upsilon(5S)$

Belle Collaboration·U. Tamponi·E. Guido·R. Mussa·I. Adachi·H. Aihara·S. Al Said·D. M. Asner·H. Atmacan·V. Aulchenko·T. Aushev·R. Ayad·V. Babu·I. Badhrees·A. M. Bakich·V. Bansal·E. Barberio·P. Behera·M. Berger·V. Bhardwaj·B. Bhuyan·J. Biswal·A. Bondar·A. Bozek·M. Bračko·T. E. Browder·D. Červenkov·A. Chen·B. G. Cheon·K. Chilikin·K. Cho·Y. Choi·D. Cinabro·S. Cunliffe·T. Czank·N. Dash·S. Di Carlo·Z. Doležal·Z. Drásal·S. Eidelman·D. Epifanov·J. E. Fast·T. Ferber·B. G. Fulsom·R. Garg·V. Gaur·N. Gabyshev·A. Garmash·M. Gelb·P. Goldenzweig·J. Haba·T. Hara·K. Hayasaka·H. Hayashii·M. T. Hedges·W. -S. Hou·K. Inami·G. Inguglia·A. Ishikawa·R. Itoh·M. Iwasaki·Y. Iwasaki·I. Jaegle·H. B. Jeon·Y. Jin·K. K. Joo·T. Julius·K. H. Kang·T. Kawasaki·H. Kichimi·D. Y. Kim·H. J. Kim·J. B. Kim·K. T. Kim·S. H. Kim·K. Kinoshita·P. Kodyš·S. Korpar·D. Kotchetkov·P. Križan·R. Kroeger·P. Krokovny·R. Kulasiri·Y. -J. Kwon·I. S. Lee·S. C. Lee·L. K. Li·Y. Li·L. Li Gioi·J. Libby·D. Liventsev·T. Luo·M. Masuda·T. Matsuda·D. Matvienko·M. Merola·H. Miyata·R. Mizuk·G. B. Mohanty·H. K. Moon
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Abstract

We study bottomonium production in association with an $\eta$ meson in $e^+e^-$ annihilations near the $\Upsilon(5S)$, at a center of mass energy of $\sqrt{s}=10.866\,$GeV. The results are based on the $121.4\,$fb$^{-1}$ data sample collected by the Belle experiment at the asymmetric energy KEKB collider. Only the $\eta$ meson is reconstructed and the missing-mass spectrum of $\eta$ candidates is investigated. We observe the $e^+e^-\to\eta\Upsilon_J(1D)$ process and find evidence for the $e^+e^-\to\eta\Upsilon(2S)$ process, while no significant signals of $\Upsilon(1S)$, $h_b(1P)$, nor $h_b(2P)$ are found. Cross sections for the studied processes are reported.

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Belle Collaboration, U. Tamponi, E. Guido, R. Mussa, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, D. Cinabro, S. Cunliffe, T. Czank, N. Dash, S. Di Carlo, Z. Doležal, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, P. Goldenzweig, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. -S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, I. Jaegle, H. B. Jeon, Y. Jin, K. K. Joo, T. Julius, K. H. Kang, T. Kawasaki, H. Kichimi, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, R. Kulasiri, Y. -J. Kwon, I. S. Lee, S. C. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon. 2018-03-08. Inclusive study of bottomonium production in association with an $\eta$ meson in $e^+e^-$ annihilations near $\Upsilon(5S)$. https://arxiv.org/abs/1803.03225

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