Chatrchyan, S., Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Ero, J., Fabjan, C., Friedl, M., Fruhwirth, R., Ghete, V.M., Hammer, J., Hansel, S., Hartl, C., Hoch, M., Hormann, N., Hrubec, J., Jeitler, M., Kasieczk..............., “Study of Z boson production in PbPb collisions at root S(NN)=2.76 TeV”, Physical Review Letters, 106, 21, , 2011