Zobrazeno 1 - 10
of 718
pro vyhledávání: '"Tiator, L"'
Autor:
Burkert, V., Crede, V., Klempt, E., Nikonov, K. V., Oller, J. A., Peláez, J. R., de Elvira, J. Ruiz, Sarantsev, A. V., Tiator, L., Thoma, U., Workman, R.
Branching ratios for the decay of hadrons with large width or near thresholds depend on their definition. We test different definitions and show that rather different branching ratios can be obtained. For wide resonances and for sequential decays wit
Externí odkaz:
http://arxiv.org/abs/2207.08472
The new single-channel, single-energy partial wave analysis method based on a simultaneous use of amplitude and partial wave analysis called AA/PWA, developed and tested on $\eta$ photoproduction in ref. Svarc et al, PRC 102, 064609 (2020), is applie
Externí odkaz:
http://arxiv.org/abs/2111.09587
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 102, 064609 (2020)
Amplitude- and truncated partial-wave analyses are combined into a single procedure and a novel, almost theory-independent single-channel method for extracting multipoles directly from measured data is developed. In practice, we have created a two-st
Externí odkaz:
http://arxiv.org/abs/2008.01355
The spectrum of $\Lambda$ and $\Sigma$ excitations is reviewed taking into account (nearly) all hyperon resonances which were seen in early analyses or in one of the recent partial-wave analyses. The spectrum is compared with the old Isgur-Karl model
Externí odkaz:
http://arxiv.org/abs/2007.04232
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