Zobrazeno 1 - 10
of 227
pro vyhledávání: '"Kamalov, S."'
Recent progress on the extraction of electromagnetic properties of nucleon resonance excitation through pion photo- and electroproduction is reviewed. Cross section data measured at MAMI, ELSA, and CEBAF are analyzed and compared to the analysis of o
Externí odkaz:
http://arxiv.org/abs/1109.6745
Publikováno v:
AIP Conf. Proc. 1432, 293-296 (2012)
We present the results on P11 resonances obtained with Dubna-Mainz-Taipei (DMT) dynamical model for pion-nucleon scattering and pion electromagnetic production. The extracted values agree well, in general, with PDG values. One pole is found correspon
Externí odkaz:
http://arxiv.org/abs/1108.1673
Publikováno v:
Phys.Rev.C82:055203,2010
Within the previously developed Dubna-Mainz-Taipei meson-exchange model, the singularity structure of the pi N scattering amplitudes has been investigated. For all partial waves up to F waves and c.m. energies up to W = 2 GeV, the T-matrix poles have
Externí odkaz:
http://arxiv.org/abs/1007.2126
The unitary isobar model MAID2007 has been used to analyze the recent data of pion electroproduction. The model contains all four-star resonances in the region below W=2 GeV and both single-Q^2 and Q^2 dependent transition form factors could be obtai
Externí odkaz:
http://arxiv.org/abs/0909.2335
Publikováno v:
Eur.Phys.J.A34:69-97,2007
The unitary isobar model MAID2007 has been developed to analyze the world data of pion photo- and electroproduction. The model contains both a common background and several resonance terms. The background is unitarized according to the K-matrix presc
Externí odkaz:
http://arxiv.org/abs/0710.0306
Publikováno v:
Phys.Rev.C76:035206,2007
A meson-exchange model for pion-nucleon scattering was previously constructed using a three-dimensional reduction scheme of the Bethe-Salpeter equation for a model Lagrangian involving \pi, \eta, N, \Delta, \rho, and \sigma fields. We thereby extend
Externí odkaz:
http://arxiv.org/abs/nucl-th/0703096
Autor:
Tiator, L., Kamalov, S.
Publikováno v:
AIPConf.Proc.904:191-202,2007
The unitary isobar model MAID is used for a partial wave analysis of pion photoproduction and electroproduction data on the nucleon. In particular we have taken emphasis on the region of the Delta(1232) resonance and have separated the resonance and
Externí odkaz:
http://arxiv.org/abs/nucl-th/0610113
Publikováno v:
Nucl.Phys.A790:229-234,2007
A meson-exchange piN model, previously constructed using three-dimensional reduction scheme of the Bethe-Salpeter equation for a model Lagrangian involving \pi, \eta, N, \Delta, rho, and \sigma fields, is extended to energies up to 2 GeV by including
Externí odkaz:
http://arxiv.org/abs/nucl-th/0610076
Autor:
Yang, S. N., Kamalov, S. S.
Publikováno v:
Int.J.Mod.Phys. A21 (2006) 873-876
The Dubna-Mainz-Taipei (DMT) dynamical model for pion electromagnetic production, which describe well the existing data from threshold up to 1 GeV photon lab energy is presented and used to analyze recent data in the $\Delta$ region . We find that wi
Externí odkaz:
http://arxiv.org/abs/hep-ph/0509318
Autor:
Elsner, D., Süle, A., Barneo, P., Bartsch, P., Baumann, D., Bermuth, J., Böhm, R., Bosnar, D., Ding, M., Distler, M., Drechsel, D., Ewald, I., Friedrich, J., Friedrich, J. M., Grözinger, S., Jennewein, P., Kamalov, S., Klein, F. H., Kohl, M., Krygier, K. W., Merkel, H., Merle, P., Müller, U., Neuhausen, R., Pospischil, Th., Potokar, M., Rosner, G., Schmieden, H., Strähle, M. Seimetz O., Tiator, L., Walcher, Th., Weis, M.
Publikováno v:
Eur.Phys.J. A27 (2006) 91-97
The reaction p(e,e'p)pi^0 has been studied at Q^2=0.2 (GeV/c)^2 in the region of W=1232 MeV. From measurements left and right of q, cross section asymmetries \rho_LT have been obtained in forward kinematics \rho_LT(\theta_\pi^0=20deg) = (-11.68 +/- 2
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0507014