caa a22 4500 445871849 CHVBK 20180317145514.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1140/epja/i2011-11013-8 doi (NATIONALLICENCE)springer-10.1140/epja/i2011-11013-8 RQM description of PS meson form factors, constraints from space-time translations and underlying dynamics [Elektronische Daten] [B. Desplanques, Y. Dong] Abstract.: The role of Poincaré covariant space-time translations is investigated in the case of the pseudoscalar-meson charge form factors. It is shown that this role extends beyond the standard energy-momentum conservation, which is accounted for in all relativistic quantum mechanics calculations. It implies constraints that have been largely ignored until now but should be fulfilled to ensure the full Poincaré covariance. The violation of these constraints, which is more or less important depending on the form of relativistic quantum mechanics that is employed, points to the validity of using a single-particle current, which is generally assumed in calculations of form factors. In short, these constraints concern the relation of the momentum transferred to the constituents to the one transferred to the system. How to account for the related constraints, as well as restoring the equivalence of different relativistic quantum mechanics approaches in estimating form factors, is discussed. Some conclusions relative to the underlying dynamics are given in the pion case. SIF, Springer-Verlag Berlin Heidelberg, 2011 Desplanques B. LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, INPG, F-38026, Grenoble Cedex, France aut Dong Y. Institute of High Energy Physics, Chinese Academy of Science, 100049, Beijing, PRC aut The European Physical Journal A Springer-Verlag 47/1(2011-01-01), 1-21 1434-6001 47:1<1 2011 47 10050 https://doi.org/10.1140/epja/i2011-11013-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epja/i2011-11013-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Desplanques B. LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, INPG, F-38026, Grenoble Cedex, France aut NATIONALLICENCE 700 1- Dong Y. Institute of High Energy Physics, Chinese Academy of Science, 100049, Beijing, PRC aut NATIONALLICENCE 773 0- The European Physical Journal A Springer-Verlag 47/1(2011-01-01), 1-21 1434-6001 47:1<1 2011 47 10050 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer