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arXiv · 1207.4345

Evidence for a Zb0(10610) in Dalitz analysis of Y(5S) -> Y(nS) pi0 pi0

I. Adachi·K. Adamczyk·H. Aihara·K. Arinstein·Y. Arita·D. M. Asner·T. Aso·V. Aulchenko·T. Aushev·T. Aziz·A. M. Bakich·Y. Ban·E. Barberio·M. Barrett·A. Bay·I. Bedny·M. Belhorn·K. Belous·V. Bhardwaj·B. Bhuyan·M. Bischofberger·S. Blyth·A. Bondar·G. Bonvicini·A. Bozek·M. Bra\v·J. Brodzicka·O. Brovchenko·T. E. Browder·M. -C. Chang·P. Chang·Y. Chao·V. Chekelian·A. Chen·K. -F. Chen·P. Chen·B. G. Cheon·K. Chilikin·R. Chistov·I. -S. Cho·K. Cho·K. -S. Choi·S. -K. Choi·Y. Choi·J. Crnkovic·J. Dalseno·M. Danilov·J. Dingfelder·Z. Dole\v·Z. Drásal·A. Drutskoy·W. Dungel·D. Dutta·S. Eidelman·D. Epifanov·S. Esen·J. E. Fast·M. Feindt·M. Fujikawa·V. Gaur·N. Gabyshev·A. Garmash·Y. M. Goh·B. Golob·M. Grosse Perdekamp·H. Guo·J. Haba·Y. L. Han·K. Hara·T. Hara·Y. Hasegawa·K. Hayasaka·H. Hayashii·D. Heffernan·T. Higuchi·Y. Horii·Y. Hoshi·K. Hoshina·W. -S. Hou·Y. B. Hsiung·H. J. Hyun·Y. Igarashi·T. Iijima·M. Imamura·K. Inami·A. Ishikawa·R. Itoh·M. Iwabuchi·M. Iwasaki·Y. Iwasaki·T. Iwashita·S. Iwata·I. Jaegle·M. Jones·T. Julius·D. H. Kah·H. Kakuno·J. H. Kang·P. Kapusta·S. U. Kataoka
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Abstract

We report the first observation of Y(5S) -> Y(1,2S) pi0 pi0 decays. Evidence for the Zb0(10610) with 4.9sigma significance is found in a Dalitz plot analysis of Y(5S) -> Y(2S) pi0 pi0 decays. The results are obtained with a 121.4 fb^-1 data sample collected with the Belle detector at the Y(5S) resonance at the KEKB asymmetric-energy e+e- collider.

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I. Adachi, K. Adamczyk, H. Aihara, K. Arinstein, Y. Arita, D. M. Asner, T. Aso, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, Y. Ban, E. Barberio, M. Barrett, A. Bay, I. Bedny, M. Belhorn, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, S. Blyth, A. Bondar, G. Bonvicini, A. Bozek, M. Bra\v, J. Brodzicka, O. Brovchenko, T. E. Browder, M. -C. Chang, P. Chang, Y. Chao, V. Chekelian, A. Chen, K. -F. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, K. Cho, K. -S. Choi, S. -K. Choi, Y. Choi, J. Crnkovic, J. Dalseno, M. Danilov, J. Dingfelder, Z. Dole\v, Z. Drásal, A. Drutskoy, W. Dungel, D. Dutta, S. Eidelman, D. Epifanov, S. Esen, J. E. Fast, M. Feindt, M. Fujikawa, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, B. Golob, M. Grosse Perdekamp, H. Guo, J. Haba, Y. L. Han, K. Hara, T. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, D. Heffernan, T. Higuchi, Y. Horii, Y. Hoshi, K. Hoshina, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, Y. Igarashi, T. Iijima, M. Imamura, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, T. Iwashita, S. Iwata, I. Jaegle, M. Jones, T. Julius, D. H. Kah, H. Kakuno, J. H. Kang, P. Kapusta, S. U. Kataoka. 2012-07-18. Evidence for a Zb0(10610) in Dalitz analysis of Y(5S) -> Y(nS) pi0 pi0. https://arxiv.org/abs/1207.4345

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