Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Desplanques, Bertrand"'
Autor:
Desplanques, Bertrand, Dong, Yu-Bing
The role of Poincar\'e covariant space-time translations is investigated in the case of the pseudoscalar-meson charge form factors calculated within a relativistic quantum mechanics framework. It is shown that this role extends beyond the standard en
Externí odkaz:
http://arxiv.org/abs/1012.2311
Autor:
Desplanques, Bertrand, Dong, Yu Bing
Publikováno v:
5th International Conference on Quarks and Nuclear Physics (QNP09), Beijing : Chine (2009)
The role of Poincar\'e covariant space-time translations is investigated in the case of a relativistic quantum mechanics approach to the pion charge form factor. It is shown that the related constraints are generally inconsistent with the assumption
Externí odkaz:
http://arxiv.org/abs/1002.3546
Autor:
Desplanques, Bertrand, Dong, Yu-Bing
Constraints related to transformations of currents under space-time translations have been considered for the relativistic quantum mechanics calculation of form factors of J=0 systems composed of scalar constituents with equal masses. Accounting for
Externí odkaz:
http://arxiv.org/abs/0907.2835
Autor:
Desplanques, Bertrand
Publikováno v:
Eur.Phys.J.A42:219-236,2009
The pion charge and scalar form factors, $F_1(Q^2)$ and $F_0(Q^2)$, are first calculated in different forms of relativistic quantum mechanics. This is done using the solution of a mass operator that contains both confinement and one-gluon-exchange in
Externí odkaz:
http://arxiv.org/abs/0906.1889
Publikováno v:
Eur.Phys.J.A43:369-378,2010
The relevance of the pseudospin symmetry in nuclei is considered. New insight is obtained from looking at the continuous transition from a model satisfying the spin symmetry to another one satisfying the pseudospin symmetry. This study suggests that
Externí odkaz:
http://arxiv.org/abs/0904.0341
Autor:
Desplanques, Bertrand
Knowledge about parity-violating effects both from theory and experiment is reviewed. Further information that could be obtained from measurements of nuclear anapole moments is discussed.
Comment: 10 pages, 1 figure; contribution to the RIA work
Comment: 10 pages, 1 figure; contribution to the RIA work
Externí odkaz:
http://arxiv.org/abs/0804.0509
Autor:
Desplanques, Bertrand, Dong, Yu Bing
Publikováno v:
Eur.Phys.J.A37:33-54,2008
Different relativistic quantum mechanics approaches have recently been used to calculate properties of various systems, form factors in particular. It is known that predictions, which most often rely on a single-particle current approximation, can le
Externí odkaz:
http://arxiv.org/abs/0801.3535
Autor:
Desplanques, Bertrand
Publikováno v:
Nucl.Phys. A755 (2005) 303-306
Noticing that the point-form approach referred to in many recent works implies physics described on hyperplanes, an approach inspired from Dirac's one, which involves a hyperboloid surface, is presented. A few features pertinent to this new approach
Externí odkaz:
http://arxiv.org/abs/nucl-th/0501051
Autor:
Desplanques, Bertrand
Publikováno v:
Eur.Phys.J. A24S2 (2005) 171-174
Parity violation in nuclear systems is reviewed. A few ingredients relevant to the description of the parity-violating nucleon-nucleon force in terms of meson exchanges are reminded. Effects in nuclear systems are then considered. They involve pp sca
Externí odkaz:
http://arxiv.org/abs/nucl-th/0501011