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Measurement of the energy dependence of the e+e\( B\overline{B} \), \( B{\overline{B}}^{\ast } \) and \( {B}^{\ast }{\overline{B}}^{\ast } \) exclusive cross sections

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Abstract

We report the first measurement of the exclusive cross sections e+e\( B\overline{B} \), e+e\( B{\overline{B}}^{\ast } \), and e+e\( {B}^{\ast }{\overline{B}}^{\ast } \) in the energy range from 10.63 GeV to 11.02 GeV. The B mesons are fully reconstructed in a large number of hadronic final states and the three channels are identified using a beam-constrained-mass variable. The shapes of the exclusive cross sections show oscillatory behavior with several maxima and minima. The results are obtained using data collected by the Belle experiment at the KEKB asymmetric-energy e+e collider.

References

  1. BaBar collaboration, Measurement of the e+e\( b\overline{b} \) cross section between \( \sqrt{s} \) = 10.54-GeV and 11.20-GeV, Phys. Rev. Lett. 102 (2009) 012001 [arXiv:0809.4120] [INSPIRE].

  2. S. Ono, A.I. Sanda and N.A. Tornqvist, B Meson Production Between the ϒ (4s) and ϒ (6s) and the Possibility of Detecting \( B\overline{B} \) Mixing, Phys. Rev. D 34 (1986) 186 [INSPIRE].

    Article  Google Scholar 

  3. A.E. Bondar, R.V. Mizuk and M.B. Voloshin, Bottomonium-like states: Physics case for energy scan above the \( B\overline{B} \) threshold at Belle-II, Mod. Phys. Lett. A 32 (2017) 1750025 [arXiv:1610.01102] [INSPIRE].

    Article  Google Scholar 

  4. Particle Data Group collaboration, Review of Particle Physics, PTEP 2020 (2020) 083C01 [INSPIRE].

  5. T. Keck et al., The Full Event Interpretation: An Exclusive Tagging Algorithm for the Belle II Experiment, Comput. Softw. Big Sci. 3 (2019) 6 [arXiv:1807.08680] [INSPIRE].

    Article  Google Scholar 

  6. S. Kurokawa and E. Kikutani, Overview of the KEKB accelerators, Nucl. Instrum. Meth. A 499 (2003) 1 [INSPIRE].

    Article  ADS  Google Scholar 

  7. T. Abe et al., Achievements of KEKB, PTEP 2013 (2013) 03A001 [INSPIRE].

  8. Belle collaboration, The Belle Detector, Nucl. Instrum. Meth. A 479 (2002) 117 [INSPIRE].

  9. Belle collaboration, Physics Achievements from the Belle Experiment, PTEP 2012 (2012) 04D001 [arXiv:1212.5342] [INSPIRE].

  10. Belle collaboration, 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, JHEP 10 (2019) 220 [arXiv:1905.05521] [INSPIRE].

  11. D.J. Lange, The EvtGen particle decay simulation package, Nucl. Instrum. Meth. A 462 (2001) 152 [INSPIRE].

    Article  ADS  Google Scholar 

  12. R. Brun, F. Bruyant, M. Maire, A.C. McPherson and P. Zanarini, GEANT3, CERN-DD-EE-84-1 (1987) [INSPIRE].

  13. T. Keck, FastBDT: A Speed-Optimized Multivariate Classification Algorithm for the Belle II Experiment, Comput. Softw. Big Sci. 1 (2017) 2 [INSPIRE].

    Article  Google Scholar 

  14. G.C. Fox and S. Wolfram, Observables for the Analysis of Event Shapes in e+e Annihilation and Other Processes, Phys. Rev. Lett. 41 (1978) 1581 [INSPIRE].

    Article  ADS  Google Scholar 

  15. BaBar collaboration, A measurement of the total width, the electronic width, and the mass of the ϒ(10580) resonance, Phys. Rev. D 72 (2005) 032005 [hep-ex/0405025] [INSPIRE].

  16. A. Le Yaouanc, L. Oliver, O. Pene and J.C. Raynal, Naive quark pair creation model of strong interaction vertices, Phys. Rev. D 8 (1973) 2223 [INSPIRE].

    Article  ADS  Google Scholar 

  17. E.A. Kuraev and V.S. Fadin, On Radiative Corrections to e+e Single Photon Annihilation at High-Energy, Sov. J. Nucl. Phys. 41 (1985) 466 [INSPIRE].

    Google Scholar 

  18. Y. Cai et al., Potential-Well Distortion, Microwave Instability, and Their Effects with Colliding Beams at KEKB, Phys. Rev. ST Accel. Beams 12 (2009) 061002 [INSPIRE].

    Article  ADS  Google Scholar 

  19. X.K. Dong, X.H. Mo, P. Wang and C.Z. Yuan, Hadronic cross section of e+e annihilation at bottomonium energy region, Chin. Phys. C 44 (2020) 083001.

    Article  ADS  Google Scholar 

  20. Belle collaboration, Measurement of ϒ(5S) decays to B0 and B+ mesons, Phys. Rev. D 81 (2010) 112003 [arXiv:1003.5885] [INSPIRE].

  21. Belle collaboration, Energy scan of the e+ehb(nP)π+π (n = 1, 2) cross sections and evidence for ϒ(11020) decays into charged bottomonium-like states, Phys. Rev. Lett. 117 (2016) 142001 [arXiv:1508.06562] [INSPIRE].

  22. Belle collaboration, Measurements of the ϒ(10860) and ϒ(11020) resonances via σ(e+e → ϒ(nS)π+π), Phys. Rev. D 93 (2016) 011101 [arXiv:1501.01137] [INSPIRE].

  23. S. Godfrey and K. Moats, Bottomonium Mesons and Strategies for their Observation, Phys. Rev. D 92 (2015) 054034 [arXiv:1507.00024] [INSPIRE].

    Article  ADS  Google Scholar 

  24. Belle collaboration, Precise measurement of the branching fractions for Bs\( {D}_s^{\left(\ast \right)+}{D}_s^{\left(\ast \right)-} \) and first measurement of the \( {D}_s^{\ast +}{D}_s^{\ast -} \) polarization using e+e collisions, Phys. Rev. D 87 (2013) 031101 [arXiv:1208.0323] [INSPIRE].

  25. P. Krokovny, Bottomonium states, talk given at Les Rencontres de Physique de la Vallee d’Aoste, La Thuile, Aosta Valley, Italy (2012) [INSPIRE].

  26. Belle collaboration, Search for transitions from ϒ(4S) and ϒ(5S) to ηb(1S) and ηb(2S) with emission of an ω meson, Phys. Rev. D 102 (2020) 092011 [arXiv:2009.11720] [INSPIRE].

  27. Belle collaboration, Inclusive study of bottomonium production in association with an η meson in e+e annihilations near ϒ(5S), Eur. Phys. J. C 78 (2018) 633 [arXiv:1803.03225] [INSPIRE].

  28. Belle collaboration, Semi-inclusive studies of semileptonic Bs decays at Belle, Phys. Rev. D 92 (2015) 072013 [arXiv:1504.02004] [INSPIRE].

  29. R. Sia and S. Stone, Model independent methods for determining \( B\left(\Upsilon (5S)\to {B}_s^{\left(\ast \right)}{\overline{B}}_s^{\left(\ast \right)}\right) \), Phys. Rev. D 74 (2006) 031501 [Erratum ibid. 80 (2009) 039901] [hep-ph/0604201] [INSPIRE].

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ArXiv ePrint: 2104.08371

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The BELLE collaboration., Mizuk, R., Bondar, A. et al. Measurement of the energy dependence of the e+e\( B\overline{B} \), \( B{\overline{B}}^{\ast } \) and \( {B}^{\ast }{\overline{B}}^{\ast } \) exclusive cross sections. J. High Energ. Phys. 2021, 137 (2021). https://doi.org/10.1007/JHEP06(2021)137

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Keywords

  • e +-e Experiments
  • Particle and resonance production
  • Quarkonium
  • Spectroscopy