The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region

Autor: A. Käser, J. Ahrens, J.R.M. Annand, H.J. Arends, K. Bantawa, P.A. Bartolome, R. Beck, V. Bekrenev, H. Berghäuser, A. Braghieri, D. Branford, W.J. Briscoe, J. Brudvik, S. Cherepnya, S. Costanza, B. Demissie, M. Dieterle, E.J. Downie, P. Drexler, L.V. Fil'kov, A. Fix, D.I. Glazier, D. Hamilton, E. Heid, D. Hornidge, D. Howdle, G.M. Huber, O. Jahn, I. Jaegle, T.C. Jude, V.L. Kashevarov, I. Keshelashvili, R. Kondratiev, M. Korolija, S.P. Kruglov, B. Krusche, V. Lisin, K. Livingston, I.J.D. MacGregor, Y. Maghrbi, J. Mancell, D.M. Manley, Z. Marinides, J.C. McGeorge, E. McNicoll, D. Mekterovic, V. Metag, S. Micanovic, D.G. Middleton, A. Mushkarenkov, A. Nikolaev, R. Novotny, M. Oberle, M. Ostrick, P. Otte, B. Oussena, P. Pedroni, F. Pheron, A. Polonski, S.N. Prakhov, J. Robinson, G. Rosner, T. Rostomyan, S. Schumann, M.H. Sikora, D.I. Sober, A. Starostin, I. Supek, M. Thiel, A. Thomas, M. Unverzagt, D.P. Watts, D. Werthmüller, L. Witthauer

Publikováno v: Physics Letters B, Vol 748, Iss C, Pp 244-250 (2015)

Photoproduction of πη-pairs from nucleons has been investigated from threshold up to incident photon energies of ≈ 1.4 GeV. The quasi-free reactions γp→pπ0η, γn→nπ0η, γp→nπ+η, and γn→pπ−η were for the first time measured fro

Externí odkaz: https://doaj.org/article/f352b7cdccb440b59667bbe6e6a1ea65

First measurement of the helicity dependence of 3He photoreactions in the Δ(1232) resonance region

Autor: David Hamilton, L.V. Filʼkov, A. Polonski, D. G. Middleton, M. Thiel, M. Oberle, B. Oussena, Werner Heil, A. Braghieri, J. R. M. Annand, D. P. Watts, F. Rigamonti, T. Rostomyan, D. I. Sober, B. Krusche, V. S. Bekrenev, V. Lisin, H. Berghäuser, K. Livingston, T. C. Jude, P. Pedroni, A. Starostin, O. Jahn, A. Nikolaev, Susanna Costanza, H. J. Arends, D. I. Glazier, A. Fix, P. Aguar Bartolomé, M. Romaniuk, G. Giardina, B. M. K. Nefkens, J. C. McGeorge, R. Beck, J. Krimmer, S. Cherepnya, F. Pheron, D. Werthmüller, I. Keshelashvili, D. Hornidge, J. Mancell, M. Ostrick, A. Kulbardis, I. Jaegle, R. Kondratiev, I. Supek, J. Ahrens, I. J. D. MacGregor, Volker Metag, E. Heid, H. Ortega, S. Schumann, P. B. Otte, D. Howdle, P. Drexler, S. N. Prakhov, Andy Thomas, M. Unverzagt, W. J. Briscoe, S. P. Kruglov, G. Rosner, A. N. Mushkarenkov, V. L. Kashevarov, D. M. Manley, M. Korolija

Publikováno v: Physics Letters B. 723:71-77

The first measurement of the helicity dependence of the total inclusive 3He photo-absorption cross section and of the partial cross sections for several reaction channels was carried out at MAMI (Mainz) in the photon energy range between 150 and 500

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d2e7d089b99035906fabc22a0cf9dc23
https://doi.org/10.1016/j.physletb.2013.04.057

Photoproduction of $\eta$ $\pi$ pairs off nucleons and deuterons

Autor: M. Ostrick, B. Oussena, D. P. Watts, K. Livingston, T. C. Jude, J. R. M. Annand, K. Bantawa, D. Hornidge, H. J. Arends, J. C. McGeorge, Michaela Thiel, W. J. Briscoe, A. N. Mushkarenkov, D. M. Manley, M. Korolija, T. Rostomyan, I. Supek, A. Starostin, S. Schumann, A. Fix, P. A. Bartolome, J. Robinson, D. Mekterovic, Susanna Costanza, A. Braghieri, Th. Strub, M. H. Sikora, D. G. Middleton, R. W. Novotny, P. B. Otte, E. J. Downie, G. M. Huber, V. Metag, R. Beck, M. Dieterle, J. Mancell, D. I. Sober, V. L. Kashevarov, M. Unverzagt, V. Lisin, I. Jaegle, D. Howdle, F. Pheron, B. Krusche, J. Ahrens, R. Kondratiev, D. Werthmueller, F. Mueller, A. Kaeser, D. I. Glazier, Lilian Witthauer, I. J. D. MacGregor, L. V. Fil'kov, S. N. Prakhov, E. F. McNicoll, David Hamilton, A. Nikolaev, A. Polonski, N. K. Walford, Andy Thomas, M. Oberle, P. Drexler, S. Cherepnya, I. Keshelashvili, P. Pedroni, Sasa Micanovic, S. Garni, Z. Marinides, Yasser Maghrbi

Publikováno v: The European physical journal / A 52(9), 272 (2016). doi:10.1140/epja/i2016-16272-1

Quasi-free photoproduction of $\pi\eta$-pairs has been investigated from threshold up to incident photon energies of 1.4 GeV, respectively up to photon-nucleon invariant masses up to 1.9 GeV. Total cross sections, angular distributions, invariant-mas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93c08e78dca5f4f74979f6a194ffa439
https://juser.fz-juelich.de/record/820981

First measurement of the circular beam asymmetry in the γ→p→π0ηp reaction

Autor: M. Kotulla, M. H. Sikora, A. Koulbardis, E. J. Downie, I.I. Stakovsky, D. G. Middleton, P. Aguar-Bartolomé, D. Branford, Yasser Maghrbi, C. M. Tarbert, T. Rostomyan, M. Ostrick, A. Nikolaev, L. K. Akasoy, W. J. Briscoe, A. N. Mushkarenkov, B. M. K. Nefkens, D. Werthmüller, A. Braghieri, F. Zehr, M. Martinez-Fabregate, R. F. B. Codling, J. D. Kellie, D. Mekterovic, S. P. Kruglov, R. Beck, D. I. Glazier, I. Jaegle, R. Kondratiev, R. Gregor, I. Zamboni, B. Demissie, B. Oussena, D. P. Watts, I. M. Suarez, K. Bantawa, V. S. Bekrenev, I. Keshelashvili, D. I. Sober, V. Metag, J. Robinson, F. Pheron, M. Unverzagt, I. J. D. MacGregor, A. Starostin, S. Cherepnya, E. Heid, D. Hornidge, L. V. Fil'kov, A. Polonski, V. L. Kashevarov, H. Berghäuser, K. Livingston, T. C. Jude, P. Pedroni, Jason Brudvik, J. R. M. Annand, Sasa Micanovic, H. J. Arends, A. Fix, E. F. McNicoll, G. Rosner, S. Schumann, R. W. Novotny, P. B. Otte, B. Krusche, Michaela Thiel, D. M. Manley, M. Korolija, S. N. Prakhov, Andy Thomas, J. C. McGeorge, V. Lisin, O. Jahn, David Hamilton, P. Drexler, I. Supek

Publikováno v: Physics Letters B. 693:551-554

The circular photon asymmetry for π 0 η photoproduction on the proton was measured for the first time at the tagged photon facility of the MAMI C accelerator using the Crystal Ball/TAPS photon spectrometer. The experimental results are interpreted

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5764faf9369a78b74a1e1ee999f48b30
https://doi.org/10.1016/j.physletb.2010.09.028

Photoproduction of theωmeson on the proton near threshold

Autor: V. L. Kashevarov, C. M. Tarbert, P. Drexler, B. Oussena, D. M. Manley, M. Korolija, T. Rostomyan, P. Aguar-Bartolomé, S. Schumann, R. W. Novotny, P. B. Otte, P. Pedroni, C. Collicott, A. Starostin, E. J. Downie, A. Polonski, M. Kotulla, D. I. Glazier, L. V. Fil'kov, V. Lisin, G. Rosner, J. Robinson, Z. Marinides, S. Costanza, F. Zehr, S. N. Prakhov, F. Pheron, M. H. Sikora, M. Unverzagt, Ya. I. Azimov, S. P. Kruglov, B. Krusche, R. Beck, Volker Metag, I. Keshelashvili, D. P. Watts, A. Braghieri, Andy Thomas, B. Demissie, A. Nikolaev, K. Bantawa, R. F. B. Codling, V. S. Bekrenev, I. Supek, D. Hornidge, M. Ostrick, E. F. McNicoll, W. J. Briscoe, A. N. Mushkarenkov, A. Koulbardis, I. I. Strakovsky, D. G. Middleton, I. J. D. MacGregor, B. M. K. Nefkens, E. Heid, Jason Brudvik, M. Thiel, J. R. M. Annand, H. Ortega, R. Gregor, Yasser Maghrbi, D. Werthmüller, J. C. McGeorge, I. Jaegle, R. Kondratiev, David Hamilton, H. Berghäuser, D. Mekterovic, M. F. Taragin, O. Jahn, K. Livingston, T. C. Jude, H. J. Arends, S. Cherepnya

Publikováno v: Physical Review C. 91

An experimental study of omega photoproduction on the proton was conducted by using the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging facility at the Mainz Microtron MAMI. The gamma p -> omega p differential cross s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::77d12d8134103946583d452dfc3d15d2
https://doi.org/10.1103/physrevc.91.045207