Amplitude analysis of e+e- => Y(nS)pi+pi- at sqrt(s)=10.865 GeV
Abstract
We report results on studies of the e+e- annihilation into three-body Y(nS)pi+pi- (n=1,2,3) final states including measurements of cross sections and the full amplitude analysis. The cross sections measured at sqrt(s)=10.865 GeV and corrected for the initial state radiation are sigma(e+e-=>Y(1S)pi+pi-)=(2.27+-0.12+-0.14) pb, sigma(e+e-=>Y(2S)pi+pi-)=(4.07+-0.16+-0.45) pb, and sigma(e+e-=>Y(3S)pi+pi-)=(1.46+-0.09+-0.16) pb. Amplitude analysis of the three-body Y(nS)pi+pi- final states strongly favors I^G(J^P)=1^+(1^+) quantum-number assignments for the two bottomonium-like Zb+- states, recently observed in the Y(nS)pi+- and hb(mP)pi+- (m=1,2) decay channels. The results are obtained with a $121.4 1/fb data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider.
Cite
@article{arxiv.1403.0992,
title = {Amplitude analysis of e+e- => Y(nS)pi+pi- at sqrt(s)=10.865 GeV},
author = {A. Garmash and A. Bondar and A. Kuzmin and A. Abdesselam and I. Adachi and H. Aihara and S. Al Said and D. M. Asner and V. Aulchenko and T. Aushev and R. Ayad and A. M. Bakich and A. Bala and V. Bhardwaj and A. Bobrov and G. Bonvicini and A. Bozek and M. Bracko and T. E. Browder and D. Cervenkov and V. Chekelian and A. Chen and B. G. Cheon and K. Chilikin and R. Chistov and K. Cho and V. Chobanova and Y. Choi and D. Cinabro and J. Dalseno and Z. Dolezal and A. Drutskoy and D. Dutta and S. Eidelman and D. Epifanov and H. Farhat and J. E. Fast and T. Ferber and A. Frey and O. Frost and V. Gaur and S. Ganguly and R. Gillard and R. Glattauer and Y. M. Goh and B. Golob and J. Haba and T. Hara and K. Hayasaka and H. Hayashii and X. H. He and Y. Hoshi and W. -S. Hou and Y. B. Hsiung and H. J. Hyun and T. Iijima and A. Ishikawa and R. Itoh and Y. Iwasaki and T. Iwashita and I. Jaegle and T. Julius and J. H. Kang and E. Kato and P. Katrenko and H. Kawai and T. Kawasaki and H. Kichimi and C. Kiesling and D. Y. Kim and J. B. Kim and J. H. Kim and K. T. Kim and M. J. Kim and Y. J. Kim and K. Kinoshita and J. Klucar and B. R. Ko and P. Kodys and S. Korpar and P. Krizan and P. Krokovny and T. Kuhr and Y. -J. Kwon and S. -H. Lee and Y. Li and L. Li Gioi and J. Libby and C. Liu and Z. Q. Liu and D. Liventsev and P. Lukin and D. Matvienko and K. Miyabayashi and H. Miyata and R. Mizuk and G. B. Mohanty and A. Moll and R. Mussa and E. Nakano and M. Nakao and Z. Natkaniec and M. Nayak and E. Nedelkovska and N. K. Nisar and S. Nishida and O. Nitoh and S. Okuno and W. Ostrowicz and P. Pakhlov and H. Park and H. K. Park and T. K. Pedlar and R. Pestotnik and M. Petric and L. E. Piilonen and E. Ribezl and M. Ritter and M. Rohrken and A. Rostomyan and S. Ryu and T. Saito and Y. Sakai and S. Sandilya and D. Santel and T. Sanuki and Y. Sato and O. Schneider and G. Schnell and A. J. Schwartz and D. Semmler and K. Senyo and M. E. Sevior and M. Shapkin and V. Shebalin and C. P. Shen and T. -A. Shibata and J. -G. Shiu and B. Shwartz and F. Simon and Y. -S. Sohn and A. Sokolov and E. Solovieva and S. Stanic and M. Staric and M. Steder and T. Sumiyoshi and U. Tamponi and K. Tanida and G. Tatishvili and Y. Teramoto and K. Trabelsi and M. Uchida and Y. Unno and S. Uno and P. Urquijo and Y. Usov and C. Van Hulse and P. Vanhoefer and G. Varner and A. Vinokurova and V. Vorobyev and M. N. Wagner and C. H. Wang and P. Wang and X. L. Wang and M. Watanabe and Y. Watanabe and K. M. Williams and E. Won and H. Yamamoto and Y. Yamashita and S. Yashchenko and Y. Yook and C. Z. Yuan and Z. P. Zhang and V. Zhilich and A. Zupanc},
journal= {arXiv preprint arXiv:1403.0992},
year = {2015}
}
Comments
15 pages, 6 tables, 9 figures. To be submitted to Phys. Rev. D