Study of Ultra-High Energy Cosmic Ray composition using Telescope Array’s Middle Drum detector and surface array in hybrid mode

R. Abbasi;M. Abe;T. Abu-Zayyad;M. Allen;R. Anderson;R. Azuma;E. Barcikowski;J. Belz;D. Bergman;S. Blake;R. Cady;M. Chae;B. Cheon;J. Chiba;M. Chikawa;W. Cho;T. Fujii;M. Fukushima;T. Goto;W. Hanlon;Y. Hayashi;N. Hayashida;K. Hibino;K. Honda;D. Ikeda;N. Inoue;T. Ishii;R. Ishimori;H. Ito;D. Ivanov;C. Jui;K. Kadota;F. Kakimoto;O. Kalashev;K. Kasahara;H. Kawai;S. Kawakami;S. Kawana;K. Kawata;E. Kido;Hongsu Kim;J. Kim;S. Kitamura;Y. Kitamura;V. Kuzmin;Y. Kwon;J. Lan;S. Lim;J. Lundquist;K. Machida;K. Martens;T. Matsuda;T. Matsuyama;J. Matthews;M. Minamino;Y. Mukai;I. Myers;K. Nagasawa;S. Nagataki;T. Nakamura;T. Nonaka;A. Nozato;S. Ogio;J. Ogura;M. Ohnishi;H. Ohoka;K. Oki;T. Okuda;M. Ono;A. Oshima;S. Ozawa;I. Park;M. Pshirkov;D. Rodríguez;G. Rubtsov;D. Ryu;H. Sagawa;N. Sakurai;A. L. Sampson;L. Scott;P. Shah;F. Shibata;T. Shibata;H. Shimodaira;B. Shin;H. Shin;J. Smith;P. Sokolsky;R. Springer;B. Stokes;S. Stratton;S. Stratton;T. Stroman;T. Suzawa;M. Takamura;M. Takeda;R. Takeishi;A. Taketa;M. Takita;Y. Tameda;Hirokazu Tanaka;Kiyoshi Tanaka;M. Tanaka;S. Thomas;G. Thomson;P. Tinyakov;I. Tkachev;H. Tokuno;T. Tomida;S. Troitsky;Y. Tsunesada;K. Tsutsumi;Y. Uchihori;S. Udo;F. Urban;G. Vasiloff;T. Wong;R. Yamane;H. Yamaoka;K. Yamazaki;Jiong Yang;K. Yashiro;Y. Yoneda;S. Yoshida;H. Yoshii;R. Zollinger;Z. Zundel