Study of 
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 and dipion transitions in 
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 decays to lower bottomonia

Guido, E.; Mussa, R.; Tamponi, U.; Adachi, I.; Aihara, H.; Said, S. Al; Asner, D. M.; Aulchenko, V.; Aushev, T.; Ayad, R.; Badhrees, I.; Bakich, A. M.; Bansal, V.; Behera, P. K.; Bhardwaj, V.; Bhuyan, B.; Biswal, Jyoti Prakash; Bobrov, A.; Bondar, A.; Bożek, A.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, K.; Choi, S. K.; Choi, Y.; Cinabro, D.; Dash, N.; Carlo, S. Di; Doležal, Z.; Drásal, Z.; Eidelman, S.; Epifanov, D.; Farhat, H.; Fast, J. E.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gelb, M.; Gillard, R.; Goldenzweig, P.; Haba, J.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Hou, W.-S.; Iijima, T.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Jacobs, W. W.; Jaeglé, I.; Jeon, H. B.; Jia, S.; Jin, Y.; Joffe, D.; Joo, K. K.; Julius, T.; Kang, K. H.; Karyan, G.; Kawasaki, T.; Kim, D. Y.; Kim, J. B.; Kim, K. T.; Kim, M. J.; Kim, S. H.; Kim, Y. J.; Kinoshita, K.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; Križan, P.; Krokovny, P.; Kulasiri, R.; Kumita, T.; Kuzmin, A.; Kwon, Y.; Lange, J. S.; Lewis, P.; Li, C. H.; Li, L.; Gioi, L. Li; Libby, J.; Liventsev, D.; Lubej, M.; Luo, T.; Masuda, M.; Matsuda, T.; Matvienko, D.; Merola, M.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Moon, H. K.; Mori, Takashi; Nakano, E.; Nakao, M.; Nanut, T.; Nath, K. J.; Natkaniec, Z.; Nayak, M.; Niiyama, M.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Ono, H.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Pardi, S.; Park, C. S.; Park, H.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Pulvermacher, C.; Ritter, M.; Rostomyan, A.; Sakai, Y.; Sandilya, S.; Šantelj, L.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shebalin, V.; Shen, C. P.; Shibata, T. A.; Shiu, J. G.; Shwartz, B.; Simon, F.; Sokolov, A.; Solovieva, E.; Starič, M.; Strube, J.; Sumisawa, K.; Sumiyoshi, T.; Takizawa, M.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Usov, Y.; Hulse, C. Van; Varner, G.; Vinokurova, A.; Vorobyev, V.; Vossen, A.; Wang, C. H.; Wang, P.; Wang, X. L.; Watanabe, M.; Watanabe, Y.; Watanuki, S.; Widmann, E.; Williams, K. M.; Won, E.; Yamashita, Y.; Ye, H.; Yuan, C. Z.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.; Zhulanov, V.; Zupanc, A.

doi:10.1103/physrevd.96.052005

Cited by 16 publications

(16 citation statements)

References 36 publications

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“…The significance of this state is quantified in section 9. Recently, Belle studied the e + e − → Υ(nS)π + π − (n = 1, 2) processes in the Υ(4S) on-resonance data [34] and reported visible cross sections. For completeness, we include the corresponding Born cross sections here.…”

Section: Jhep10(2019)220mentioning

confidence: 99%

Observation of a new structure near 10.75 GeV in the energy dependence of the e+e−→ ϒ (nS)π+π− (n = 1, 2, 3) cross sections

Mizuk

Bondar

Adachi

et al. 2019

J. High Energ. Phys.

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We report a new measurement of the e + e − → ϒ(nS)π + π − (n = 1, 2, 3) cross sections at energies from 10.52 to 11.02 GeV using data collected with the Belle detector at the KEKB asymmetric-energy e + e − collider. We observe a new structure in the energy dependence of the cross sections; if described by a Breit-Wigner function its mass and width are found to be $$ M=\left(10752.7\pm {5.9}_{-1.1}^{+0.7}\right)\mathrm{MeV}/{c}^2 $$ M = 10752.7 ± 5.9 − 1.1 + 0.7 MeV / c 2 and $$ \Gamma =\left({35.5}_{-11.3\kern0.5em -3.3}^{+17.6+3.9}\right) $$ Γ = 35.5 − 11.3 − 3.3 + 17.6 + 3.9 MeV, where the first error is statistical and the second is systematic. The global significance of the new structure including systematic uncertainty is 5.2 standard deviations. We also find evidence for the e + e − → ϒ (1S)π + π − process at the energy 10.52 GeV, which is below the B $$ \overline{B} $$ B ¯ threshold.

show abstract

Section: Jhep10(2019)220mentioning

confidence: 99%

Observation of a new structure near 10.75 GeV in the energy dependence of the e+e−→ ϒ (nS)π+π− (n = 1, 2, 3) cross sections

Mizuk

Bondar

Adachi

et al. 2019

J. High Energ. Phys.

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“…In addition, there have been new measurements after our analysis in Refs. [23,24] by the Belle Collaboration with statistics higher than before, and especially they measured the angular distributions of the Υ(4S) → Υ(1S, 2S)ππ transitions for the first time [25]. These new data help us to perform a comprehensive analysis of the Υ(4S, 3S, 2S) → Υ(nS)ππ processes.…”

Section: Introductionmentioning

confidence: 99%

“…The left panels display the ππ invariant mass spectra, while the right panels show the cos θ distributions. The solid squares denote the charged decay mode data from the Belle Collaboration[25]. The solid circles and solid triangles denote the charged and neutral decay mode data, respectively, from the CLEO Collaboration[38].…”

mentioning

confidence: 99%

Chromopolarizabilities of bottomonia from the ϒ(2S,3S,4S)→ϒ(1

Chen

Guo

2019

Phys. Rev. D

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The dipion transitions Υ(2S, 3S, 4S) → Υ(1S, 2S)ππ are systemaically studied by considering the mechanisms of the hadronization of soft gluons, exchanging the bottomoniumlike Z b states, and the bottom-meson loops. The strong pion-pion final-state interaction, especially including the channel coupling to KK in the S-wave, is taken into account in a model-independent way using the dispersion theory. Through fitting to the available experimental data, we extract values of the transition chromopolarizabilities |α Υ(mS)Υ(nS) |, which measure the chromoelectric couplings of the bottomonia with soft gluons. It is found that the Z b exchange has a large impact on the extracted chromopolarizablity values. The obtained |α Υ(2S)Υ(1S) | considering the Z b exchange is (2.9 ± 2.0) × 10 −2 GeV −3 , about one order of magnitude smaller than the one without considering the Z b exchange effect. This indicates that the interactions of bottomonia with light hadrons through exchanging soft gluons are very weak, and the u-channel exchange of the Z b states should be much more important for the Υπ scattering than the t-channel soft-gluon exchange.

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“…On the basis of heavy quark spin symmetry, the QCD multipole expansion (QCDME) model predicts that transitions involving the η particle should be suppressed relative to dipion transitions [3]. Several recent results [4][5][6][7] challenge this long-standing expectation. Following these measurements, it has been argued that the light-quark degrees of freedom actively intervene in the transitions [8].…”

mentioning

confidence: 99%

“…For Bðϒð4SÞ → hϒð1SÞÞ, we use the values obtained in Ref. [5], which analyzes the same data sample considered in this Letter. Several systematic uncertainties cancel, being common to the numerator and denominator.…”

mentioning

confidence: 99%

Observation of ϒ(4S)→η′ϒ(1S
Guido¹,
Mussa²,
Tamponi³
et al. 2018
Phys. Rev. Lett.
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We report the first observation of the hadronic transition ϒ(4S)→η^{'}ϒ(1S), using 496 fb^{-1} data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We reconstruct the η^{'} meson through its decays to ρ^{0}γ and to π^{+}π^{-}η, with η→γγ. We measure B(ϒ(4S)→η^{'}ϒ(1S))=[3.43±0.88(stat)±0.21(syst)]×10^{-5}, with a significance of 5.7σ.

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Study of η and dipion transitions in ϒ(4S) decays to lower bottomonia

Cited by 16 publications

References 36 publications

Observation of a new structure near 10.75 GeV in the energy dependence of the e+e−→ ϒ (nS)π+π− (n = 1, 2, 3) cross sections

Observation of a new structure near 10.75 GeV in the energy dependence of the e+e−→ ϒ (nS)π+π− (n = 1, 2, 3) cross sections

Chromopolarizabilities of bottomonia from the ϒ(2S,3S,4S)→ϒ(1

Observation of ϒ(4S)→η′ϒ(1S
Guido¹,
Mussa²,
Tamponi³
et al. 2018
Phys. Rev. Lett.
Self Cite

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Study of η and dipion transitions in ϒ(4S) decays to lower bottomonia

Cited by 16 publications

References 36 publications

Observation of a new structure near 10.75 GeV in the energy dependence of the e+e−→ ϒ (nS)π+π− (n = 1, 2, 3) cross sections

Observation of a new structure near 10.75 GeV in the energy dependence of the e+e−→ ϒ (nS)π+π− (n = 1, 2, 3) cross sections

Chromopolarizabilities of bottomonia from the ϒ(2S,3S,4S)→ϒ(1

Observation of ϒ(4S)→η′ϒ(1SGuido1, Mussa2, Tamponi3 et al. 2018Phys. Rev. Lett.Self Cite

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Observation of ϒ(4S)→η′ϒ(1S
Guido¹,
Mussa²,
Tamponi³
et al. 2018
Phys. Rev. Lett.
Self Cite