# Light meson spectroscopy from Dalitz plot analyses of $\eta_c$ decays to $\eta' K^+ K^-$, $\eta' \pi^+ \pi^-$, and $\eta \pi^+ \pi^-$ produced in two-photon interactions

@inproceedings{Lees2021LightMS, title={Light meson spectroscopy from Dalitz plot analyses of \$\eta\_c\$ decays to \$\eta' K^+ K^-\$, \$\eta' \pi^+ \pi^-\$, and \$\eta \pi^+ \pi^-\$ produced in two-photon interactions}, author={J. P. Lees and V. Poireau and V. Tisserand and E. Grauges and A. Palano and G. Eigen and D. N. Brown and Yu. G. Kolomensky and M. Fritsch and H. Koch and T. Schroeder and R. Cheaib and C. Hearty and T. S. Mattison and J. A. McKenna and R. Y. So and V. E. Blinov and A. R. Buzykaev and V. P. Druzhinin and V. B. Golubev and E. A. Kozyrev and E. A. Kravchenko and A. P. Onuchin and S. I. Serednyakov and Yu. I. Skovpen and E. P. Solodov and K. Yu. Todyshev and A. J. Lankford and B. Dey and J. W. Gary and O. Long and A. M. Eisner and W. S. Lockman and W. Panduro Vazquez and D. S. Chao and C. H. Cheng and B. Echenard and K. T. Flood and D. G. Hitlin and J. Kim and Y. Li and D. X. Lin and T. S. Miyashita and P. Ongmongkolkul and J. Oyang and F. C. Porter and M. R{\"o}hrken and Z. Huard and B. T. Meadows and B. G. Pushpawela and Michael D. Sokoloff and L. Sun and J. G. Smith and S. R. Wagner and D. Bernard and M. Verderi and D. Bettoni and C. Bozzi and R. Calabrese and G. Cibinetto and E. Fioravanti and I. Garzia and E. Luppi and V. Santoro and A. Calcaterra and R. de Sangro and G. Finocchiaro and S. Martellotti and P. Patteri and I. M. Peruzzi and M. Piccolo and M. Rotondo and A. Zallo and S. Passaggio and Claudia Patrignani and B. J. Shuve and H. M. Lacker and B. Bhuyan and U. Mallik and C. Chen and J. Cochran and S. Prell and A. V. Gritsan and N. Arnaud and M. Davier and F. Le Diberder and A. M. Lutz and G. Wormser and D. J. Lange and D. M. Wright and J. P. Coleman and E. Gabathuler and D. E. Hutchcroft and D. J. Payne and C. Touramanis and A. J. Bevan and F. Di Lodovico and R. Sacco and G. Cowan and Sw. Banerjee and C. L. Davis and A. G. Denig and W. Gradl and K. Griessinger and A. Hafner and K. R. Schubert and R. J. Barlow and G. D. Lafferty and R. Cenci and Abolhassan Jawahery and D. A. Roberts and R. Cowan and S. H. Robertson and R. M. Seddon and N. Neri and F. Palombo and L. Cremaldi and R. Godang and D. J. Summers and P. Taras and G. De Nardo and C. Sciacca and G. Raven and C. P. Jessop and J. M. LoSecco and K. Honscheid and R. Kass and A. Gaz and M. Margoni and M. Posocco and Gabriele Simi and F. Simonetto and R. Stroili and Simon Akar and E. Ben-Haim and M. Bomben and G. R. Bonneaud and G. Calderini and J. Chauveau and G. Marchiori and J. Ocariz and M. Biasini and Elisabetta Manoni and A. Rossi and G. Batignani and S. Bettarini and M. Carpinelli and G. Casarosa and M. Chrzaszcz and F. Forti and M. A. Giorgi and Alberto Lusiani and B. Oberhof and E. Paoloni and Matteo Rama and G. Rizzo and J. J. Walsh and L. Zani and A. J. S. Smith and F. Anulli and R. Faccini and F. Ferrarotto and F. Ferroni and A. Pilloni and G. Piredda and C. B{\"u}nger and S. Dittrich and O. Gr{\"u}nberg and M. He{\ss} and T. Leddig and C. Vo{\ss} and Roland Waldi and T. Adye and F. F. Wilson and S. Emery and G. Vasseur and D. Aston and C. Cartaro and M. R. Convery and J. Dorfan and W. Dunwoodie and M. Ebert and R. C. Field and B. G. Fulsom and M. T. Graham and C. Hast and W. R. Innes and P. Kim and D. W. G. S. Leith and S. Luitz and D. B. MacFarlane and D. R. Muller and H. Neal and B. N. Ratcliff and A. Roodman and M. K. Sullivan and J. Va’vra and W. J. Wisniewski and M. V. Purohit and J. R. Wilson and A. Randle-Conde and S. J. Sekula and H. Ahmed and M. Bellis and P. R. Burchat and E. M. T. Puccio and M. S. Alam and J. A. Ernst and R. Gorodeisky and N. Guttman and D. R. Peimer and A. Soffer and S. M. Spanier and J. L. Ritchie and R. F. Schwitters and J. M. Izen and X. C. Lou and F. Bianchi and F. De Mori and A. Filippi and D. Gamba and L. Lanceri and L. Vitale and F. Martinez-Vidal and Arantza Oyanguren and J. Albert and A. Beaulieu and F. U. Bernlochner and G. J. King and R. Kowalewski and T. Lueck and I. M. Nugent and J. M. Roney and R. J. Sobie and N. Tasneem and Tim Gershon and P. F. Harrison and T. E. Latham and R. Prepost and S. L. Wu}, year={2021} }

We study the processes $\gamma \gamma \to \eta_c \to \eta' K^+ K^-$, $\eta' \pi^+ \pi^-$, and $\eta \pi^+ \pi^-$ using a data sample of 519 $fb^{-1}$ recorded with the BaBar detector operating at the SLAC PEP-II asymmetric-energy $e^+e^-$ collider at center-of-mass energies at and near the $\Upsilon(nS)$ ($n = 2,3,4$) resonances. This is the first observation of the decay $\eta_c \to \eta' K^+ K^-$ and we measure the branching fraction $\Gamma(\eta_c \to \eta' K^+ K^-)/(\Gamma(\eta_c \to \eta… Expand

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