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Start Over Author "Gregor, R." Journal physics letters b
15 results on '"Gregor, R."'

1. Data on Is and Ic in γ→p→pπ0π0 reveal cascade decays of N(1900) via N(1520)π

Author

Sokhoyan, V., Gutz, E., van Pee, H., Anisovich, A.V., Bacelar, J.C.S., Bantes, B., Bartholomy, O., Bayadilov, D., Beck, R., Beloglazov, Y., Castelijns, R., Crede, V., Dutz, H., Elsner, D., Ewald, R., Frommberger, F., Fuchs, M., Funke, Ch., Gregor, R., Gridnev, A., Hillert, W., Hoffmeister, Ph., Horn, I., Jaegle, I., Junkersfeld, J., Kalinowsky, H., Kammer, S., Kleber, V., Klein, Frank, Klein, Friedrich, Klempt, E., Kotulla, M., Krusche, B., Lang, M., Löhner, H., Lopatin, I., Lugert, S., Mertens, T., Messchendorp, J.G., Metag, V., Nanova, M., Nikonov, V.A., Novinski, D., Novotny, R., Ostrick, M., Pant, L., Pfeiffer, M., Piontek, D., Roy, A., Sarantsev, A.V., Schmidt, Ch., Schmieden, H., Shende, S., Süle, A., Sumachev, V.V., Szczepanek, T., Thiel, A., Thoma, U., Trnka, D., Varma, R., Walther, D., Wendel, Ch., and Wilson, A.

Subjects
Nuclear and High Energy Physics
Published
2015
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2. K+Λ and K+Σ0 photoproduction with fine center-of-mass energy resolution

Author

Jude, T.C., Glazier, D.I., Watts, D.P., Aguar-Bartolomé, P., Akasoy, L.K., Annand, J.R.M., Arends, H.J., Bantawa, K., Beck, R., Bekrenev, V.S., Berghäuser, H., Braghieri, A., Branford, D., Briscoe, W.J., Brudvik, J., Cherepnya, S., Demissie, B.T., Dieterle, M., Downie, E.J., Fil'kov, L.V., Gregor, R., Heid, E., Hornidge, D., Jaegle, I., Jahn, O., Kashevarov, V.L., Keshelashvili, I., Kondratiev, R., Korolija, M., Koulbardis, A.A., Kruglov, S.P., Krusche, B., Lisin, V., Livingston, K., MacGregor, I.J.D., Maghrbi, Y., Manley, D.M., Marinides, Z., Mart, T., Martinez, M., McGeorge, J.C., McNicoll, E.F., Middleton, D.G., Mushkarenkov, A., Nefkens, B.M.K., Nikolaev, A., Nikonov, V.A., Oberle, M., Ostrick, M., Otte, P.B., Oussena, B., Pedroni, P., Pheron, F., Polonski, A., Prakhov, S., Robinson, J., Rosner, G., Rostomyan, T., Sarantsev, A.V., Schumann, S., Sikora, M.H., Sober, D.I., Starostin, A., Strakovsky, I., Suarez, I.M., Supek, I., Thiel, M., Thomas, A., Unverzagt, M., Werthmüller, D., Witthauer, L., and Zehr, F.

Subjects
Nuclear and High Energy Physics
Published
2014
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3. K+ Lambda and K+ Sigma(0) photoproduction with fine center-of-mass energy resolution

Author

Jude T. C., Glazier D. I., Watts D. P., Aguar-Bartolome P., Akasoy L. K., Annand J. R. M., Arends H. J., Bantawa K., Beck R., Bekrenev V. S., Berghaeuser H., Braghieri A., Branford D., Briscoe W. J., Brudvik J., Cherepnya S., Demissie B. T., Dieterle M., Downie E. J., Fil'kov L. V., Gregor R., Heid E., Hornidge D., Jaegle I., and Jahn O.

Published
2014

4. Photoproduction of ω mesons off the proton

Author

Wilson, A., Crede, V., Anisovich, A.V., Bacelar, J.C.S., Bantes, B., Bartholomy, O., Bayadilov, D., Beck, R., Beloglazov, Y.A., Brinkmann, K.T., Castelijns, R., Dutz, H., Elsner, D., Ewald, R., Frommberger, F., Fuchs, M., Funke, Chr., Gregor, R., Gridnev, A., Gutz, E., Hannappel, J., Hillert, W., Hoffmeister, P., Horn, I., Jaegle, I., Jude, T., Junkersfeld, J., Kalinowsky, H., Kleber, V., Klein, Frank, Klein, Friedrich, Klempt, E., Kotulla, M., Krusche, B., Lang, M., Löhner, H., Lopatin, I.V., Lugert, S., Mertens, T., Messchendorp, J.G., Metag, V., Nanova, M., Nikonov, V.A., Novinski, D., Novotny, R., Ostrick, M., Pant, L.M., van Pee, H., Pfeiffer, M., Roy, A., Sarantsev, A.V., Schmidt, C., Schmieden, H., Shende, S., Sokhoyan, V., Sparks, N., Süle, A., Sumachev, V.V., Szczepanek, T., Thoma, U., Trnka, D., Varma, R., Walther, D., Wendel, Ch., and Wiedner, U.

Published
2015
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5. [formula omitted] and [formula omitted] photoproduction with fine center-of-mass energy resolution

Author

Jude, T.C., Glazier, D.I., Watts, D.P., Aguar-Bartolomé, P., Akasoy, L.K., Annand, J.R.M., Arends, H.J., Bantawa, K., Beck, R., Bekrenev, V.S., Berghäuser, H., Braghieri, A., Branford, D., Briscoe, W.J., Brudvik, J., Cherepnya, S., Demissie, B.T., Dieterle, M., Downie, E.J., Fil'kov, L.V., Gregor, R., Heid, E., Hornidge, D., Jaegle, I., Jahn, O., Kashevarov, V.L., Keshelashvili, I., Kondratiev, R., Korolija, M., Koulbardis, A.A., Kruglov, S.P., Krusche, B., Lisin, V., Livingston, K., MacGregor, I.J.D., Maghrbi, Y., Manley, D.M., Marinides, Z., Mart, T., Martinez, M., McGeorge, J.C., McNicoll, E.F., Middleton, D.G., Mushkarenkov, A., Nefkens, B.M.K., Nikolaev, A., Nikonov, V.A., Oberle, M., Ostrick, M., Otte, P.B., Oussena, B., Pedroni, P., Pheron, F., Polonski, A., Prakhov, S., Robinson, J., Rosner, G., Rostomyan, T., Sarantsev, A.V., Schumann, S., Sikora, M.H., Sober, D.I., Starostin, A., Strakovsky, I., Suarez, I.M., Supek, I., Thiel, M., Thomas, A., Unverzagt, M., Werthmüller, D., Witthauer, L., and Zehr, F.

Published
2014
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6. Double pion photoproduction off nuclei – Are there effects beyond final-state interaction?

Author

Maghrbi, Y., Gregor, R., Lugert, S., Ahrens, J., Annand, J.R.M., Arends, H.J., Beck, R., Bekrenev, V., Boillat, B., Braghieri, A., Branford, D., Briscoe, W.J., Brudvik, J., Cherepnya, S., Codling, R., Downie, E.J., Dexler, P., Filʼkov, L.V., Fix, A., Glazier, D.I., Heid, E., Hornidge, D., Jahn, O., Jaegle, I., Kashevarov, V.L., Keshelashvili, I., Knezevic, A., Kondratiev, A., Korolija, M., Kotulla, M., Krambrich, D., Krusche, B., Lang, M., Lisin, V., Livingston, K., MacGregor, I.J.D., Manley, D.M., Martinez, M., McGeorge, J.C., Mekterovic, D., Metag, V., Nefkens, B.M.K., Nikolaev, A., Novotny, R., Ostrick, M., Pedroni, P., Pheron, F., Polonski, A., Prakhov, S.N., Price, J.W., Rosner, G., Rost, M., Rostomyan, T., Schadmand, S., Schumann, S., Sober, D., Starostin, A., Supek, I., Thomas, A., Unverzagt, M., Watts, D.P., Werthmüller, D., and Zehr, F.

Published
2013
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7. Transparency ratio in [formula omitted] and the in-medium [formula omitted] width

Author

Nanova, M., Metag, V., Ramos, A., Oset, E., Jaegle, I., Makonyi, K., Brinkmann, K., Bartholomy, O., Bayadilov, D., Beloglazov, Y.A., Crede, V., Dutz, H., Ehmanns, A., Elsner, D., Essig, K., Ewald, R., Fabry, I., Fuchs, M., Funke, Ch., Gregor, R., Gridnev, A.B., Gutz, E., Höffgen, S., Hoffmeister, P., Horn, I., Junkersfeld, J., Kalinowsky, H., Klein, Frank, Klein, Friedrich, Klempt, E., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Löhner, H., Lopatin, I.V., Lotz, J., Lugert, S., Menze, D., Mertens, T., Messchendorp, J.G., Morales, C., Novotny, R., Ostrick, M., Pant, L.M., van Pee, H., Pfeiffer, M., Roy, A., Radkov, A., Schadmand, S., Schmidt, Ch., Schmieden, H., Schoch, B., Süle, A., Sumachev, V.V., Szczepanek, T., Thoma, U., Trnka, D., Varma, R., Walther, D., and Wendel, Ch.

Published
2012
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8. Data onIsandIcinγ→p→pπ0π0reveal cascade decays ofN(1900)viaN(1520)π

Author

Sokhoyan, V., primary, Gutz, E., additional, van Pee, H., additional, Anisovich, A.V., additional, Bacelar, J.C.S., additional, Bantes, B., additional, Bartholomy, O., additional, Bayadilov, D., additional, Beck, R., additional, Beloglazov, Y., additional, Castelijns, R., additional, Crede, V., additional, Dutz, H., additional, Elsner, D., additional, Ewald, R., additional, Frommberger, F., additional, Fuchs, M., additional, Funke, Ch., additional, Gregor, R., additional, Gridnev, A., additional, Hillert, W., additional, Hoffmeister, Ph., additional, Horn, I., additional, Jaegle, I., additional, Junkersfeld, J., additional, Kalinowsky, H., additional, Kammer, S., additional, Kleber, V., additional, Klein, Frank, additional, Klein, Friedrich, additional, Klempt, E., additional, Kotulla, M., additional, Krusche, B., additional, Lang, M., additional, Löhner, H., additional, Lopatin, I., additional, Lugert, S., additional, Mertens, T., additional, Messchendorp, J.G., additional, Metag, V., additional, Nanova, M., additional, Nikonov, V.A., additional, Novinski, D., additional, Novotny, R., additional, Ostrick, M., additional, Pant, L., additional, Pfeiffer, M., additional, Piontek, D., additional, Roy, A., additional, Sarantsev, A.V., additional, Schmidt, Ch., additional, Schmieden, H., additional, Shende, S., additional, Süle, A., additional, Sumachev, V.V., additional, Szczepanek, T., additional, Thiel, A., additional, Thoma, U., additional, Trnka, D., additional, Varma, R., additional, Walther, D., additional, Wendel, Ch., additional, and Wilson, A., additional

Published
2015
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9. First measurement of the circular beam asymmetry in the [formula omitted] reaction

Author

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

Published
2010
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10. Photoproduction of meson pairs: First measurement of the polarization observable [formula omitted]

Author

Gutz, E., Sokhoyan, V., van Pee, H., Anisovich, A.V., Bacelar, J.C.S., Bantes, B., Bartholomy, O., Bayadilov, D., Beck, R., Beloglazov, Yu., Castelijns, R., Crede, V., Dutz, H., Elsner, D., Ewald, R., Frommberger, F., Fuchs, M., Funke, Ch., Gregor, R., Gridnev, A., Hillert, W., Hoffmeister, Ph., Horn, I., Jägle, I., Junkersfeld, J., Kalinowsky, H., Kammer, S., Kleber, V., Klein, Frank, Klein, Friedrich, Klempt, E., Kotulla, M., Krusche, B., Lang, M., Löhner, H., Lopatin, I., Lugert, S., Menze, D., Mertens, T., Messchendorp, J.G., Metag, V., Nanova, M., Nikonov, V., Novinski, D., Novotny, R., Ostrick, M., Pant, L., Pfeiffer, M., Piontek, D., Roberts, W., Roy, A., Sarantsev, A., Schadmand, S., Schmidt, Ch., Schmieden, H., Schoch, B., Shende, S., Süle, A., Sumachev, V., Szczepanek, T., Thiel, A., Thoma, U., Trnka, D., Varma, R., Walther, D., Weinheimer, Ch., and Wendel, Ch.

Published
2010
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11. Transparency ratio in γA→η′A′ and the in-medium η′ width

Author

Nanova, M., primary, Metag, V., additional, Ramos, A., additional, Oset, E., additional, Jaegle, I., additional, Makonyi, K., additional, Brinkmann, K., additional, Bartholomy, O., additional, Bayadilov, D., additional, Beloglazov, Y.A., additional, Crede, V., additional, Dutz, H., additional, Ehmanns, A., additional, Elsner, D., additional, Essig, K., additional, Ewald, R., additional, Fabry, I., additional, Fuchs, M., additional, Funke, Ch., additional, Gregor, R., additional, Gridnev, A.B., additional, Gutz, E., additional, Höffgen, S., additional, Hoffmeister, P., additional, Horn, I., additional, Junkersfeld, J., additional, Kalinowsky, H., additional, Klein, Frank, additional, Klein, Friedrich, additional, Klempt, E., additional, Konrad, M., additional, Kopf, B., additional, Krusche, B., additional, Langheinrich, J., additional, Löhner, H., additional, Lopatin, I.V., additional, Lotz, J., additional, Lugert, S., additional, Menze, D., additional, Mertens, T., additional, Messchendorp, J.G., additional, Morales, C., additional, Novotny, R., additional, Ostrick, M., additional, Pant, L.M., additional, van Pee, H., additional, Pfeiffer, M., additional, Roy, A., additional, Radkov, A., additional, Schadmand, S., additional, Schmidt, Ch., additional, Schmieden, H., additional, Schoch, B., additional, Süle, A., additional, Sumachev, V.V., additional, Szczepanek, T., additional, Thoma, U., additional, Trnka, D., additional, Varma, R., additional, Walther, D., additional, and Wendel, Ch., additional

Published
2012
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12. First measurement of the circular beam asymmetry in the γ→p→π0ηp reaction

Author

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

Published
2010
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13. Photoproduction of meson pairs: First measurement of the polarization observable Is

Author

Gutz, E., primary, Sokhoyan, V., additional, van Pee, H., additional, Anisovich, A.V., additional, Bacelar, J.C.S., additional, Bantes, B., additional, Bartholomy, O., additional, Bayadilov, D., additional, Beck, R., additional, Beloglazov, Yu., additional, Castelijns, R., additional, Crede, V., additional, Dutz, H., additional, Elsner, D., additional, Ewald, R., additional, Frommberger, F., additional, Fuchs, M., additional, Funke, Ch., additional, Gregor, R., additional, Gridnev, A., additional, Hillert, W., additional, Hoffmeister, Ph., additional, Horn, I., additional, Jägle, I., additional, Junkersfeld, J., additional, Kalinowsky, H., additional, Kammer, S., additional, Kleber, V., additional, Klein, Frank, additional, Klein, Friedrich, additional, Klempt, E., additional, Kotulla, M., additional, Krusche, B., additional, Lang, M., additional, Löhner, H., additional, Lopatin, I., additional, Lugert, S., additional, Menze, D., additional, Mertens, T., additional, Messchendorp, J.G., additional, Metag, V., additional, Nanova, M., additional, Nikonov, V., additional, Novinski, D., additional, Novotny, R., additional, Ostrick, M., additional, Pant, L., additional, Pfeiffer, M., additional, Piontek, D., additional, Roberts, W., additional, Roy, A., additional, Sarantsev, A., additional, Schadmand, S., additional, Schmidt, Ch., additional, Schmieden, H., additional, Schoch, B., additional, Shende, S., additional, Süle, A., additional, Sumachev, V., additional, Szczepanek, T., additional, Thiel, A., additional, Thoma, U., additional, Trnka, D., additional, Varma, R., additional, Walther, D., additional, Weinheimer, Ch., additional, and Wendel, Ch., additional

Published
2010
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14. First measurement of the circular beam asymmetry in the γ→p→π0ηp reaction

Author

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

Subjects
Pseudoscalar meson photoproduction, Polarization observables, Baryon resonances, Nuclear Experiment
Abstract

The circular photon asymmetry for π0η 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 within a phenomenological isobar model that confirms the dominant role of the Δ(1700)D33 resonance. The measured asymmetry allows us to identify small contributions from positive-parity resonances via interference terms with the dominant D33 amplitude.

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15. Transparency ratio in γA→η′A′ and the in-medium η′ width

Author

Nanova, M., Metag, V., Ramos, A., Oset, E., Jaegle, I., Makonyi, K., Brinkmann, K., Bartholomy, O., Bayadilov, D., Beloglazov, Y.A., Crede, V., Dutz, H., Ehmanns, A., Elsner, D., Essig, K., Ewald, R., Fabry, I., Fuchs, M., Funke, Ch., Gregor, R., Gridnev, A.B., Gutz, E., Höffgen, S., Hoffmeister, P., Horn, I., Junkersfeld, J., Kalinowsky, H., Klein, Frank, Klein, Friedrich, Klempt, E., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Löhner, H., Lopatin, I.V., Lotz, J., Lugert, S., Menze, D., Mertens, T., Messchendorp, J.G., Morales, C., Novotny, R., Ostrick, M., Pant, L.M., van Pee, H., Pfeiffer, M., Roy, A., Radkov, A., Schadmand, S., Schmidt, Ch., Schmieden, H., Schoch, B., Süle, A., Sumachev, V.V., Szczepanek, T., Thoma, U., Trnka, D., Varma, R., Walther, D., and Wendel, Ch.

Subjects
Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The photoproduction of η′-mesons off different nuclei has been measured with the CBELSA/TAPS detector system for incident photon energies between 1500–2200 MeV. The transparency ratio has been deduced and compared to theoretical calculations describing the propagation of η′-mesons in nuclei. The comparison indicates a width of the η′-meson of the order of Γ=15–25 MeV at ρ=ρ0 for an average momentum pη′=1050 MeV/c, at which the η′-meson is produced in the nuclear rest frame. The inelastic η′N cross section is estimated to be 3–10 mb. Parameterizing the photoproduction cross section of η′-mesons by σ(A)=σ0Aα, a value of α=0.84±0.03 has been deduced.

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