Cross section for γn→π0n measured at the Mainz A2 experiment

Autor: K. Livingston, S. Lutterer, S. Gardner, N. S. Borisov, M. Unverzagt, V. V. Kulikov, H. J. Arends, A. B. Lazarev, A. Neiser, Alfred Švarc, F. Cividini, A. Braghieri, F. Afzal, D. G. Middleton, B. Oussena, C. Collicott, D. P. Watts, K. Spieker, K. Bantawa, M. Bashkanov, R. A. Miskimen, M. Ostrick, S. Kay, C. Sfienti, V. E. Tarasov, Patrick Achenbach, Yu. A. Usov, G. M. Huber, A. E. Kudryavtsev, A. Käser, O. Steffen, P. Aguar-Bartolomé, V. L. Kashevarov, A. G. Denig, E. J. Downie, N. K. Walford, J. Wettig, E. Mornacchi, A. Thiel, J. Stahov, S. Fegan, Durga Paudyal, J. C. McGeorge, Nicholas Zachariou, V. Sokhoyan, I. J. D. MacGregor, M. I. Ferretti Bondy, M. A. Martemianov, D. Gurevich, D. Hornidge, D. Ghosal, S. Wagner, M. Wolfes, Anthony W. Thomas, D. I. Glazier, Guy Ron, Z. Ahmed, Susanna Costanza, Michaela Thiel, W. J. Briscoe, A. Powell, M. Günther, L. Tiator, I. I. Strakovsky, A. N. Mushkarenkov, S. A. Bulychjov, D. M. Manley, Lena Heijkenskjöld, P. P. Martel, R. Omerović, M. Korolija, R. Beck, C. Mullen, J. R. M. Annand, D. Werthmüller, M. Biroth, M. Hadžimehmedović, P. B. Otte, A. B. Neganov, P. Pedroni, W. Gradl, S. N. Prakhov, B. Krusche, P. Drexler, H. Osmanović, T. Rostomyan, I. Supek, I. Gorodnov, Ron L. Workman, Roderick M. Macrae, S. Abt, C. S. Akondi, A. J. Sarty

Publikováno v: Physical Review C. 100

The γ n → π 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 ∘ to 162 ∘ , making use of model-dependent

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6d1b059748bafc732f76b9f43b571e12
https://doi.org/10.1103/physrevc.100.065205

Generalization of the model-independent Laurent–Pietarinen single-channel pole-extraction formalism to multiple channels

Autor: Alfred Švarc, H. Osmanović, Lothar Tiator, Ron L. Workman, M. Hadžimehmedović, J. Stahov

Publikováno v: Physics Letters B, Vol 755, Iss, Pp 452-455 (2016)
Physics Letters B

A method to extract resonance pole information from single-channel partial-wave amplitudes based on a Laurent (Mittag-Leffler) expansion and conformal mapping techniques has recently been developed. This method has been applied to a number of reactio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79c860a10198a51d5546b3a155433f0d
http://www.sciencedirect.com/science/article/pii/S0370269316001544

Eta and Etaprime Photoproduction on the Nucleon with the Isobar Model EtaMAID2018

Autor: K. Nikonov, M. Hadžimehmedović, R. Omerović, H. Osmanović, J. Stahov, Lothar Tiator, M. Ostrick, Mikhail Gorchtein, Alfred Švarc, V. L. Kashevarov

Publikováno v: EPJ Web of Conferences, Vol 199, p 01019 (2019)

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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e1a3cf1fdd842d47db179bb84a1a4b9

Connection between angle-dependent phase ambiguities and the uniqueness of the partial- wave decomposition

Autor: Ron L. Workman, J. Stahov, H. Osmanović, R. Omerović, V. L. Kashevarov, K. Nikonov, M. Hadžimehmedović, Y. Wunderlich, Alfred Švarc, L. Tiator, M. Ostrick

Unconstrained partial-wave amplitudes obtained at discrete energies from fits to complete sets of experimental data may not vary smoothly with energy, and are in principle non-unique. We demonstrate how this behavior can be ascribed to the continuum

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1955c640005f5ddc06929055b376836f
https://doi.org/10.1103/physrevc.97.054611

N* resonances from K $\Lambda$ Λ amplitudes in sliced bins in energy

Autor: D. G. Ireland, Volker D. Burkert, Eberhard Klempt, J. Stahov, R. Omerović, V. A. Nikonov, Alfred Švarc, M. Hadžimehmedović, U. Thoma, A. V. Sarantsev, A. V. Anisovich

Publikováno v: The European Physical Journal A. 53

The two reactions $\gamma p\to K^+\Lambda$ and $\pi^-p\to K^0\Lambda$ are analyzed to determine the leading photoproduction multipoles and the pion-induced partial wave amplitudes in slices of the invariant mass. The multipoles and the partial-wave a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe2b63f84957a90ac4ce434846613646
https://doi.org/10.1140/epja/i2017-12443-x