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Your search keyword '"WINNEMOLLER, A"' showing total 2 results
Start Over Author "WINNEMOLLER, A" Publisher elsevier science bv
2 results on '"WINNEMOLLER, A"'

1. Exclusive measurement of the eta -> pi(+) pi(-) gamma decay

Author

ADLARSON, P, ADOLPH, C, AUGUSTYNIAK, W, BARDAN, W, BASHKANOV, M, BEDNARSKI, T, BERGMANN, FS, BERLOWSKI, M, BHATT, H, BRINKMANN, KT, BUSCHER, M, CALEN, H, CLEMENT, H, CODERRE, D, CZERWINSKI, E, DOROSHKEVICH, E, ENGELS, R, ERVEN, W, EYRICH, W, FEDORETS, P, FOHL, K, FRANSSON, K, GOLDENBAUM, F, GOSLAWSKI, P, GRIGORYEV, K, GULLSTROM, CO, HANHART, C, HEIJKENSKJOLD, L, HEIMLICH, J, HEJNY, V, HINTERBERGER, F, HODANA, M, HOISTAD, B, JACEWICZ, M, JANY, A, JANY, BR, JARCZYK, L, JOHANSSON, T, KAMYS, B, KEMMERLING, G, KHAKIMOVA, O, KHOUKAZ, A, KISTRYN, S, KLAJA, J, KLEINES, H, KLOS, B, KREN, F, KRZEMIEN, W, KULESSA, P, KUPSC, A, LALWANI, K, LEUPOLD, S, LORENTZ, B, MAGIERA, A, MAIER, R, MARIANSKI, B, MARCINIEWSKI, P, MEISSNER, UG, MIKIRTYCHIANTS, M, MORSCH, HP, MOSKAL, P, NANDI, BK, NIEDZWIECKI, S, OHM, H, PASSFELD, A, PAULY, C, DEL RIO, EP, PETRI, T, PETUKHOV, Y, PISKUNOV, N, PLUCINSKI, P, PODKOPAL, P, POVTOREYKO, A, PRASUHN, D, PRICKING, A, PYSZ, K, PYSZNIAK, A, RAUSMANN, T, REDMER, CF, RITMAN, J, ROY, A, RUDY, Z, SAWANT, S, SCHADMAND, S, SCHMIDT, A, SEFZICK, T, SERDYUK, V, SHAH, N, SIEMASZKO, M, SIUDAK, R, SKORODKO, T, SKURZOK, M, SMYRSKI, J, SOPOV, V, STASSEN, R, STEPANIAK, J, STERZENBACH, G, STOCKHORST, H, STOLLENWERK, F, STROHER, H, SZCZUREK, A, TASCHNER, A, TERSCHLUSEN, C, TOLBA, T, TRZCINSKI, A, VARMA, R, VLASOV, P, WAGNER, GJ, WEGLORZ, W, WINNEMOLLER, A, WIRZBA, A, WOLKE, M, WRONSKA, A, WUSTNER, P, WURM, P, YUAN, X, YUREV, L, ZABIEROWSKI, J, ZHENG, C, ZIELINSKI, MJ, ZIPPER, W, ZLOMANCZUK, J, and ZUPRANSKI, P

Subjects
Exclusive Measurement, Eta Meson, Box Anomaly
Abstract

An exclusive measurement of the decay eta -> pi(+) pi(-) gamma has been performed at the WASA facility at COSY. The eta mesons were produced in the fusion reaction pd -> He-3 X at a proton beam momentum of 1.7 GeV/c. Efficiency corrected differential distributions have been extracted based on 13 960 +/- 140 events after background subtraction. The measured pion angular distribution is consistent with a relative p-wave of the two-pion system, whereas the measured photon energy spectrum was found at variance with the simplest gauge invariant matrix element of eta -> pi(+) pi(-) gamma. A parameterization of the data can be achieved by the additional inclusion of the empirical pion vector form factor multiplied by a first-order polynomial in the squared invariant mass of the pi(+) pi(-) system. (C) 2011 Elsevier B.V All rights reserved.

Published
2012
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2. pi(0)pi(0) Production in proton-proton collisions at T-p=1.4 GeV The WASA-at-COSY Collaboration

Author

ADLARSON, P, ADOLPH, C, AUGUSTYNIAK, W, BASHKANOV, M, BEDNARSKI, T, BERGMANN, FS, BERLOWSKI, M, BHATT, H, BRINKMANN, KT, BUSCHER, M, CALEN, H, CLEMENT, H, CODERRE, D, CZERWINSKI, E, DOROSHKEVICH, E, ENGELS, R, ERVEN, W, EYRICH, W, FEDORETS, P, FOHL, K, FRANSSON, K, GOLDENBAUM, F, GOSLAWSKI, P, GRIGORYEV, K, GULLSTROM, CO, HEIJKENSKJOLD, L, HEIMLICH, J, HEJNY, V, HINTERBERGER, F, HODANA, M, HOISTAD, B, JACEWICZ, M, JANUSZ, M, JANY, A, JANY, BR, JARCZYK, L, JOHANSSON, T, KAMYS, B, KEMMERLING, G, KHAKIMOVA, O, KHOUKAZ, A, KISTRYN, S, KLAJA, J, KLEINES, H, KLOS, B, KREN, F, KRZEMIEN, W, KULESSA, P, KUPSC, A, LALWANI, K, LORENTZ, B, MAGIERA, A, MAIER, R, MARIANSKI, B, MARCINIEWSKI, P, MIKIRTYCHIANTS, M, MORSCH, HP, MOSKAL, P, NANDI, BK, NIEDZWIECKI, S, OHM, H, PASSFELD, A, PAULY, C, DEL RIO, EP, PETUKHOV, Y, PISKUNOV, N, PLUCINSKI, P, PODKOPAL, P, POVTOREYKO, A, PRASUHN, D, PRICKING, A, PYSZ, K, RAUSMANN, T, REDMER, CF, RITMAN, J, ROY, A, RUDY, Z, SAWANT, S, SCHADMAND, S, SCHMIDT, A, SEFZICK, T, SERDYUK, V, SHAH, N, SIEMASZKO, M, SKORODKO, T, SKURZOK, M, SMYRSKI, J, SOPOV, V, STASSEN, R, STEPANIAK, J, STERZENBACH, G, STOCKHORST, H, STROHER, H, SZCZUREK, A, TASCHNER, A, TOLBA, T, TRZCINSKI, A, VARMA, R, VLASOV, P, WAGNER, GJ, WEGLORZ, W, WIEDNER, U, WINNEMOLLER, A, WOLKE, M, WRONSKA, A, WUSTNER, P, WURM, P, YUAN, X, YUREV, L, ZABIEROWSKI, J, ZHENG, C, ZIELINSKI, MJ, ZIPPER, W, ZLOMANCZUK, J, and ZUPRANSKI, P

Subjects
Roper Resonance, Pion Production, Pp, Cross-Sections, 2-Pion Production, Excitation, Model
Abstract

The reaction pp -> pp pi(0)pi(0) has been investigated at a beam energy of 1.4 GeV using the WASA-at-COSY facility. The total cross section is found to be (324 +/- 21(systematic) +/- 58(normalization)) mu b. In order to study the production mechanism, differential kinematic distributions have been evaluated. The differential distributions indicate that both initial state protons are excited into intermediate Delta(1232) resonances, each decaying into a proton and a single pion, thereby producing the pion pair in the final state. No significant contribution of the Roper resonance N*(1440) via its decay into a proton and two pions is found. (C) 2011 Elsevier B.V. All rights reserved.

Published
2012

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