Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Osmanović, H."'
The mechanism for the formation of the $\Lambda(1405)$ resonance is studied in a chiral quark model that includes quark-meson as well as contact (four point) interactions. The negative-parity $S$-wave scattering amplitudes for strangeness $-1$ and $1
Externí odkaz:
http://arxiv.org/abs/2201.01489
Autor:
Osmanović, H., Hadžimehmedović, M., Omerović, R., Stahov, J., Kashevarov, V., Ostrick, M., Tiator, L., Švarc, A.
Publikováno v:
Phys. Rev. C 104, 034605 (2021)
Experimental data for pion photoproduction including differential cross sections and various polarization observables from four reaction channels, $\gamma p \to \pi^0 p$, $\gamma p \to \pi^+n$, $\gamma n \to \pi^- p$ and $\gamma n \to \pi^0 n$ from t
Externí odkaz:
http://arxiv.org/abs/2107.06513
Publikováno v:
Phys. Rev. C 100, 035204 (2019)
We investigate the formation of resonances in the P33 partial wave with the emphasis on possible emergence of dynamically generated quasi-bound states as a consequence of a strong $p$-wave pion attractive interaction in this partial wave, as well as
Externí odkaz:
http://arxiv.org/abs/1908.11750
Autor:
Osmanović, H., Hadžimehmedović, M., Omerović, R., Stahov, J., Gorchtein, M., Kashevarov, V., Nikonov, K., Ostrick, M., Tiator, L., Švarc, A.
Publikováno v:
Phys. Rev. C 100, 055203 (2019)
High precision data of the $\gamma p \to \pi^0 p$ reaction from its threshold up to $W=2$~GeV have been used in order to perform a single-energy partial wave analysis with minimal model dependence. Continuity in energy was achieved by imposing constr
Externí odkaz:
http://arxiv.org/abs/1908.05167
Autor:
Briscoe, W. J., Hadzimehmedovi, M., Kudryavtsev, A. E., Kulikov, V. V., Martemianov, M. A., Strakovsky, I. I., Svarc, A., Tarasov, V. E., Workman, R. L., Abt, S., Achenbach, P., Akondi, C. S., Afzal, F., Aguar-Bartolome, P., Ahmed, Z., Annand, J. R. M., Arends, H. J., Bantawa, K., Bashkanov, M., Beck, R., Biroth, M., Borisov, N., Braghieri, A., Bulychjov, S. A., Cividini, F., Collicott, C., Costanza, S., Denig, A., Downie, E. J., Drexler, P., Fegan, S., Bondy, M. I. Ferretti, Gardner, S., Ghosal, D., Glazier, D. I., Gorodnov, I., Gradl, W., Gunther, M., Gurevich, D., Heijkenskjold, L., Hornidge, D., Huber, G. M., Kaeser, M., Kashevarov, V. L., Kay, S., Korolija, M., Krusche, B., Lazarev, A., Livingston, K., Lutterer, S., MacGregor, I. J. D., Macrae, R., Manley, D. M., Martel, P. P., McGeorge, J. C., Middleton, D. G., Miskimen, R., Mornacchi, E., Mushkarenkov, A., Mullen, C., Neganov, A., Neiser, A., Ostrick, M., Otte, P. B., Osmanovic, H., Oussena, R. Omerovic B., Paudyal, D., Pedroni, P., Powell, A., Prakhov, S. N., Ron, G., Rostomyan, T., Sarty, A., Senti, C., Sokhoyan, V., Spieker, K., Stahov, J., Steffen, O., Supek, I., Thiel, A., Thiel, M., Thomas, A., Tiator, L., Unverzagt, M., Usov, Yu. A., Walford, N. K., Watts, D. P., Wagner, S., Werthmueller, D., Wettig, J., Wolfes, M., Zachariou, N.
Publikováno v:
Phys. Rev. C 100, 065205 (2019)
The $\gamma n \to \pi^0 n$ differential cross section evaluated for 27 energy bins span the photon-energy range 290-813 MeV (W = 1.195-1.553 GeV) and the pion c.m. polar production angles, ranging from 18 deg to 162 deg, making use of model-dependent
Externí odkaz:
http://arxiv.org/abs/1908.02730
Autor:
Tiator, L., Gorchtein, M., Kashevarov, V. L., Nikonov, K., Ostrick, M., Hadzimehmedovic, M., Omerovic, R., Osmanovic, H., Stahov, J., Svarc, A.
The isobar model EtaMAID has been updated with new and high precision data for eta and etaprime photoproduction on protons and neutrons from MAMI, ELSA, GRAAL and CLAS. The background is described in a recently developed Regge-cut model, and for the
Externí odkaz:
http://arxiv.org/abs/1807.04525
Autor:
Švarc, A., Osmanović, H., Hadžimehmedović, M., Omerović, R., Stahov, J., Kashevarov, V., Nikonov, K., Ostrick, M., Tiator, L.
Publikováno v:
Phys. Rev. C 98, 045206 (2018)
It has recently been proven that the invariance of observables with respect to angle dependent phase rotations of reaction amplitudes mixes multipoles changing also their relative strength [1]. All contemporary partial wave analyses (PWA) in $\eta$ p
Externí odkaz:
http://arxiv.org/abs/1807.02759
Autor:
Švarc, A., Wunderlich, Y., Osmanović, H., Hadžimehmedović, M., Omerović, R., Stahov, J., Kashevarov, V., Nikonov, K., Ostrick, M., Tiator, L., Workman, R.
Publikováno v:
Few-Body Systems (2018) 59:96
Unconstrained partial-wave amplitudes obtained at discrete energies from fits to complete sets of eight independent observables which are required to uniquely reconstruct reaction amplitudes do not vary smoothly with energy, and are in principle non-
Externí odkaz:
http://arxiv.org/abs/1806.05675
Autor:
Anisovich, A. V., Burkert, V., Hadžimehmedović, M., Ireland, D. G., Klempt, E., Nikonov, V. A., Omerović, R., Osmanović, H., Sarantsev, A. V., Stahov, J., Švarc, A., Thoma, U.
Data on the reaction $\gamma p\to K^+\Lambda$ from the CLAS experiments are used to derive the leading multipoles, $E_{0+}$, $M_{1-}$, $E_{1+}$, and $M_{1+}$, from the production threshold to 2180\,MeV in 24 slices of the invariant mass. The four mul
Externí odkaz:
http://arxiv.org/abs/1712.07549
Publikováno v:
Phys. Rev. C 97, 035204 (2018)
In view of the recent results of lattice QCD simulation in the P11 partial wave that has found no clear signal for the three-quark Roper state we investigate a different mechanism for the formation of the Roper resonance in a coupled channel approach
Externí odkaz:
http://arxiv.org/abs/1709.09025