|
新山 雅之 所属 京都産業大学 理学部 物理科学科 職種 教授 |
|
| 発行・発表の年月 | 2018/06 |
| 形態種別 | その他 |
| 標題 | Observation of $e^+e^-\toπ^+π^-π^0χ_{b1,2}(1P)$ and search for $e^+e^-\toφχ_{b1,2}(1P)$ at $\sqrt{s}=$10.96---11.05 GeV |
| 執筆形態 | その他 |
| 著者・共著者 | J. H. Yin,C. Z. Yuan,I. Adachi,H. Aihara,S. Al Said,D. M. Asner,V. Aulchenko,T. Aushev,R. Ayad,V. Babu,I. Badhrees,S. Bahinipati,A. M. Bakich,V. Bansal,P. Behera,C. Beleno,B. Bhuyan,T. Bilka,J. Biswal,A. Bobrov,A. Bozek,M. Bracko,T. E. Browder,L. Cao,D. Cervenkov,P. Chang,V. Chekelian,A. Chen,B. G. Cheon,K. Chilikin,K. Cho,S. -K. Choi,Y. Choi,S. Choudhury,D. Cinabro,S. Cunliffe,N. Dash,S. Di Carlo,J. Dingfelder,Z. Dolezal,T. V. Dong,Z. Drasal,S. Eidelman,D. Epifanov,J. E. Fast,T. Ferber,B. G. Fu |
| 概要 | We report searches for the processes $e^+e^-\to\pi^+\pi^-\pi^0\chi_{bJ}$ and
$e^+e^-\to\phi\chi_{bJ}$ (J=1,2) based on data samples collected by the Belle experiment at the KEKB collider. We report the first observation of the process $e^+e^-\to (\pi^+\pi^-\pi^0)_{\rm non-\omega}\chi_{b1}$ and first evidence for $e^+e^-\to\omega\chi_{bJ}$ in the vicinity of the $\Upsilon(11020)$ resonance, with center-of-mass energies from 10.96 to 11.05~GeV. The significances for $(\pi^+\pi^-\pi^0)_{\rm non-\omega}\chi_{b1}$ and $\omega\chi_{bJ}$ are greater than $5.3\sigma$ and $4.0\sigma$, respectively. We also investigate the energy dependence of the $e^+e^-\to\pi^+\pi^-\pi^0\chi_{bJ}$ cross section, but we cannot determine whether the contributions are from the $\Upsilon(10860)$ and $\Upsilon(11020)$ resonances or non-resonant continuum processes. The signals for $e^+e^-\to \phi\chi_{bJ}$ are not significant, and the upper limits of the Born cross sections at the 90\% confidence level are $0.7$ and $1.0$~pb for $e^+e^-\to \phi\chi_{b1}$ and $\phi\chi_{b2}$, respectively, for center-of-mass energies from 10.96 to 11.05~GeV. |
| DOI | 10.1103/PhysRevD.98.091102 |
| PermalinkURL | http://arxiv.org/abs/1806.06203v2 |
| researchmap用URL | http://arxiv.org/pdf/1806.06203v2 |