| Affiliation: | 1. Deutsches Electronen Synchroton, DESY, D-2000, Hamburg, Fed. Rep. Germany;2. Institute for Nuclear Research of the Academy of Sciences of the USSR, 117312 Moscow, USSR;1. Department of Physics, University of Colorado, Boulder, CO 80309, USA;2. Center for Theory of Quantum Matter, University of Colorado, Boulder, CO 80309, USA;1. Departamento de Ciencias, Facultad de Artes Liberales, Universidad Adolfo Ibáñez, Santiago 7491169, Chile;2. Centro de Investigación en Matemáticas, A.C., Unidad Mérida, Yuc. 97302, Mexico;3. Departamento de Física, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile;4. Centro de Recursos Educativos Avanzados, CREA, Santiago 7500018, Chile;5. Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Santiago 7491169, Chile;1. Institute for Physical Research, NAS of Armenia, 0203 Ashtarak, Armenia;2. Armenian State Pedagogical University, 0010 Yerevan, Armenia;3. Institute of Physics and Technology, National Research Tomsk Polytechnic University, Tomsk 634050, Russia;1. Czech Technical University in Prague, Faculty of Electrical Engineering, Technicka 2, 166 27 Prague 6, Czech Republic;2. Laboratoire d’Acoustique de l’Universite du Maine-UMR CNRS 6613, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France |
