Production of the 
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 states from the 
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Wu, Qi; Chen, Dian-Yong; Guo, Feng-Kun

doi:10.1103/physrevd.99.034022

Cited by 16 publications

(12 citation statements)

References 73 publications

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“…In Ref. [22], the decay processes Υ(5S ) → Z (′) b π have been investigated, and the branching ratios of Υ(5S ) → Z (′) b π are estimated to be of order 1%, which is consistent with the experimental measurements by the Belle collaboration. In Ref.…”

Section: Introductionsupporting

confidence: 66%

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$D$ wave bottomonia production from $Z_b^{(\prime)}$ decay

Wu,

Chen,

Matsuki

2020

Preprint

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In the present work, we investigate the dipion transitions between Υ(5S ) and Υ J (1D) with J = 1, 2, 3. Our analysis indicates that the dominant sources of the anomalously large widths of Υ(5S ) → Υ J (1D)π + π − should be Z (′) b , i.e., the dipion transitions occur via the cascade decays Υ(5SWith the assumption that all the short ranged dynamics could be absorbed in a single cutoff with a model parameter α, the present estimations indicate that in a reasonable parameter range the measured branching ratios of Υ(5S ) → Υ J (1D)π + π − can be reproduced in magnitude, which further proves that the decays via Z (′) b dominate the dipion transitions of Υ(5S ) to Υ J (1D). Moreover, we also predict the ratios of the branching fractions of Z (′) b → Υ J (1D)π, which in our calculations are largely independent of the parameter α and could be tested by further experiments in Belle II.

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Section: Introductionsupporting

confidence: 66%

“…Since Υ(5S ) dominantly decays into a pair of bottom mesons [8], the bottom meson pair can transit into a bottomonia and a light meson by exchanging a proper bottom meson. Such kind of bottom meson loops mechanism plays a crucial role in understanding hidden bottom decays of Υ(5S ) [16][17][18][19][20][21][22]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

$D$ wave bottomonia production from $Z_b^{(\prime)}$ decay

Wu,

Chen,

Matsuki

2020

Preprint

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“…However, it should be stressed that the mechanism proposed in Ref. [36] should not change the line shapes but only the total rate of the production cross sections, which is not a subject of the current study.…”

Section: Pion Exchangementioning

confidence: 85%

“…In this work, we do not aim at predicting the absolute rate of the decays ϒð10860Þ → γW bJ , which might involve some more sophisticated mechanisms (e.g., as advocated in Ref. [36]), but rather focus on the energy dependence of the line shapes with an arbitrary overall normalization. To this end, we assume that for this process (similarly to the Z b 's production) the energy dependence from the production operator is rather smooth in the vicinity of thresholds and can be merely neglected as compared to rapidly varying B-meson amplitudes in the final state.…”

Section: Pion Exchangementioning

confidence: 99%

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Spin partners WbJ from the line shapes of the Zb(10610) and
Baru
¹
,
Epelbaum
²
,
Filin
³

et al. 2019
Phys. Rev. D

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In a recent paper [Phys. Rev. D 98, 074023 (2018)], the most up-to-date experimental data for all measured production and decay channels of the bottomoniumlike states Z b ð10610Þ and Z b ð10650Þ were analyzed in a field-theoretical coupled-channel approach which respects analyticity and unitarity and incorporates both the pion exchange and a short-ranged potential nonperturbatively. All parameters of the interaction were fixed directly from data, and pole positions for both Z b states were determined. In this work we employ the same approach to predict in a parameter-free way the pole positions and the line shapes in the elastic and inelastic channels of the (still to be discovered) spin partners of the Z b states. They are conventionally referred to as W bJ 's with the quantum numbers J PC ¼ J þþ (J ¼ 0, 1, 2). It is demonstrated that the results of our most advanced pionful fit, which gives the best χ 2 =d:o:f: for the data in the Z b channels, are consistent with all W bJ states being above-threshold resonances which manifest themselves as well-pronounced hump structures in the line shapes. On the contrary, in the pionless approach, all W bJ 's are virtual states which can be seen as enhanced threshold cusps in the inelastic line shapes. Since the two above scenarios provide different imprints on the observables, the role of the one-pion exchange in the B ðÃÞBðÃÞ systems can be inferred from the once available experimental data directly.

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