Zobrazeno 1 - 10
of 423
pro vyhledávání: '"Desplanques, B."'
Autor:
Desplanques, B., Dong, Y. B.
Publikováno v:
Eur.Phys.J.A47:13,2011
The role of Poincar\'e 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 rel
Externí odkaz:
http://arxiv.org/abs/1006.0578
Autor:
Desplanques, B., Dong, Y. B.
Publikováno v:
PoS LC2008:018,2008
The comparison of form factors calculated from a single-particle current in different relativistic quantum mechanic approaches evidences tremendous discrepancies. The role of constraints coming from space-time translations is considered here with thi
Externí odkaz:
http://arxiv.org/abs/0810.2386
Publikováno v:
Phys.Rev.C77:064002,2008
Two-pion exchange parity-violating nucleon-nucleon interactions from recent effective field theories and earlier fully covariant approaches are investigated. The potentials are compared with the idea to obtain better insight on the role of low-energy
Externí odkaz:
http://arxiv.org/abs/0803.2075
Publikováno v:
Mod.Phys.Lett.A23:2293-2296,2008
We consider the parity-violating two-pion-exchange potential obtained from the covariant formalism in the past and the state-of-the-art effective field theory approach. We discuss the behavior of the potential in coordinate space and its application
Externí odkaz:
http://arxiv.org/abs/0802.1606
Autor:
Desplanques, B.
Publikováno v:
Eur.Phys.J.A32:533-535,2007
The origin of parity violation in physics is still unknown. At the present time, it is introduced in the theory by requiring that the SU(2) subgroup entering the description of interactions involves the left components. In the present contribution, o
Externí odkaz:
http://arxiv.org/abs/hep-ph/0612040
Autor:
Desplanques, B.
Publikováno v:
Nuclear Physics A, 18th International Conference on Few-Body Problems in Physics, Santos, Sao Paulo (2007) 578-582
Different approaches have been applied to the calculation of form factors of various hadronic systems within relativistic quantum mechanics. In a one-body current approximation, they can lead to results evidencing large discrepancies. Looking for an
Externí odkaz:
http://arxiv.org/abs/nucl-th/0611065
Publikováno v:
Phys.Lett.B651:257-262,2007
The parity-violating nucleon-nucleon (NN) potential is considered up to next-to-next-to leading order in heavy-baryon chiral perturbation theory. We include one-pion exchange at leading order and the two-pion exchange and two-nucleon contact terms at
Externí odkaz:
http://arxiv.org/abs/nucl-th/0611018
Publikováno v:
Eur.Phys.J.A32:513-515,2007
We calculate the parity-violating nucleon-nucleon potential in heavy-baryon chiral perturbation theory up to the next-to-next-to-leading order. The one-pion exchange comes in the leading order and the next-to-next-to-leading order consists of two-pio
Externí odkaz:
http://arxiv.org/abs/nucl-th/0609015
Publikováno v:
Phys.Rev. C73 (2006) 065501
By looking at the parity-nonconserving (PNC) asymmetries at different energies in $\vec{p} p$ scattering, it is in principle possible to determine the PNC $\rho NN$ and $\omega NN$ couplings of a single-meson-exchange model of the PNC $NN$ force. The
Externí odkaz:
http://arxiv.org/abs/nucl-th/0512043
Autor:
Desplanques, B.
Publikováno v:
Dans Few-Body Problems in Physics - Proceedings of the 3rd Asia-Pacific Conference, World Scientific (Ed.) (2007)
Invariance of form factors under Lorentz boosts is a criterion often advocated to determine whether their estimate in a RQM framework is reliable. It is shown that verifying relations stemming from covariance properties under space-time translations
Externí odkaz:
http://arxiv.org/abs/nucl-th/0510003