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2. Search for a dark photon in the π0→e+e−γ decay

Author

M. Mikirtychiants, Magdalena Skurzok, C. F. Redmer, Bo Höistad, G. J. Wagner, Jozef Zlomanczuk, A. Magiera, P. Goslawski, T. Sefzick, W. Eyrich, James Ritman, B. Mariański, C.-O. Gullström, Markus Büscher, H. Clement, Zbigniew Rudy, R. Siudak, Eryk Czerwiński, A. Trzcinski, Harald Kleines, Aleksandra Wrońska, Ulf-G. Meißner, A. Bondar, E. Perez del Rio, N. Shah, K. Pysz, P. Fedorets, Ferdous Khan, W. Zipper, P. Adlarson, W. Bardan, J. Zabierowski, K. Lalwani, Ankhi Roy, M. Hodana, Antoni Szczurek, P. Wurm, H. P. Morsch, H. Ohm, R. Varma, D. Pszczel, M. Żurek, Izabela Ciepał, T. Johansson, I. Ozerianska, V. Hejny, K. Föhl, B. Kłos, M. Siemaszko, Hans Stockhorst, V. Sopov, E. Stephan, H. Ströher, Marcin Zieliński, Frank Goldenbaum, S. Sawant, Pawel Marciniewski, F. Hauenstein, P. Podkopał, Rolf Stassen, K. Grigoryev, E. Doroshkevich, B. Shwartz, J. Stepaniak, Stanisław Kistryn, P. Pluciński, Alexander Schmidt, M. Krapp, P. Żuprański, F. Hinterberger, Hans Calén, R. Maier, Lena Heijkenskjöld, A. Jany, D. Prasuhn, Wojciech Krzemien, L. Li, Kjell Fransson, W. Wȩglorz, T. Tolba, Akira Yamamoto, A. Kupść, M. Berłowski, W. Erven, L. Jarczyk, Andreas Wirzba, A. Pricking, T. Skorodko, K. Demmich, V. Serdyuk, Di. Kirillov, G. Sterzenbach, B. Lorentz, Jerzy Smyrski, M. Bashkanov, F. S. Bergmann, Ralf Engels, Magnus Wolke, Paweł Moskal, Günter Kemmerling, S. Schadmand, B. Kamys, A. Pyszniak, W. Augustyniak, P. Wüstner, A. Goswami, A. Khoukaz, Himani Bhatt, Basanta Kumar Nandi, N.M. Piskunov, Benedykt R. Jany, P. Kulessa, A. Kuzmin, J. Klaja, D. Coderre, and D. Lersch

Subjects
Physics, Nuclear and High Energy Physics, Muon, Anomalous magnetic dipole moment, Magnetic moment, 010308 nuclear & particles physics, Elementary particle, 01 natural sciences, 7. Clean energy, Dark photon, Nuclear physics, Massless particle, Particle decay, 0103 physical sciences, 010306 general physics, Lepton
Abstract

The presently world largest data sample for π 0 → γ e + e − decays studies containing nearly 5 × 10 5 events was collected using the WASA detector at COSY. A search for a dark photon U produced in the π 0 → γ U → γ e + e − decay from the p p → p p π 0 reaction was carried out. An upper limit on the square of the U − γ mixing strength parameter ϵ 2 of 5 × 10 − 6 at 90% CL was obtained for the mass range 20 MeV M U 100 MeV . This result together with other recent experimental limits significantly reduces the M U vs. ϵ 2 parameter space which could explain the presently seen deviation between the Standard Model prediction and the direct measurement of the anomalous magnetic moment of the muon.

Published
2013

3. π0π0 Production in proton–proton collisions at Tp=1.4 GeV

Author

Aleksandra Wrońska, E. Perez del Rio, A. Povtoreyko, P. Wurm, G. J. Wagner, A. Taeschner, L. Yurev, P. Zupranski, X. Yuan, Pawel Plucinski, Ankhi Roy, W. Eyrich, P. Kulessa, C. Zheng, C. F. Redmer, B. Kamys, Stanisław Kistryn, Annika Passfeld, W. Węglorz, A. Khoukaz, M. Hodana, M. Berłowski, A. Magiera, C. Adolph, P. Podkopał, Ulrich Wiedner, W. Augustyniak, A. Pricking, F. Goldenbaum, Lena Heijkenskjöld, James Ritman, Jozef Zlomanczuk, Hans Stockhorst, Basanta Kumar Nandi, D. Prasuhn, Marek Jacewicz, Ralf Engels, H. Bhatt, H. P. Morsch, N.M. Piskunov, C. Pauly, R. Maier, Bo Höistad, M. Buescher, F. Hinterberger, T. Skorodko, Benedykt R. Jany, A. Schmidt, K. Lalwani, W. Erven, T. Sefzick, M. Bashkanov, Paweł Moskal, A. Winnemoeller, S. Schadmand, P. Vlasov, W. Zipper, Zbigniew Rudy, Eryk Czerwiński, G. Kemmerling, Y. Petukhov, T. Tolba, R. Stassen, V. Serdyuk, Pawel Marciniewski, V. Hejny, Jerzy Smyrski, P. Goslawski, B. Kłos, H. Clement, S. Sawant, K. Foehl, C.-O. Gullström, N. Shah, Andrzej Kupsc, L. Jarczyk, J. Stepaniak, H. Kleines, G. Sterzenbach, J. Heimlich, Bernd Lorentz, E. Doroshkevich, K. Pysz, F. S. Bergmann, Magnus Wolke, Hans Calén, A. Jany, A. Trzciński, Tomasz Bednarski, R. Varma, K. Grigoryev, M. Siemaszko, Kjell Fransson, P. Fedorets, J. Klaja, D. Coderre, V. Sopov, F. Kren, S. Niedzwiecki, Wojciech Krzemien, H. Stroeher, Marcin Zieliński, J. Zabierowski, Antoni Szczurek, M. Mikirtychiants, Magdalena Skurzok, T. Rausmann, O. Khakimova, B. Mariański, P. Wuestner, Patrik Adlarson, Tord Johansson, H. Ohm, Michał Janusz, and K. T Brinkmann

Subjects
Physics, Baryon, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Pion, Meson, Proton, Hadron, Pi, Elementary particle, Nucleon
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(normaliz ...

Published
2012

4. Invariant-mass distributions for the pp $ \rightarrow$ pp$ \eta$ reaction at Q = 10 MeV

Author

B. Kamys, Wojciech Krzemien, P. Wüstner, W. Zipper, L. Jarczyk, Rafał Czyżykiewicz, A. Khoukaz, M. Siemaszko, J. Ritman, Paweł Moskal, Damian Tomasz Gil, Jerzy Smyrski, W. Oelert, D. Grzonka, Marcin Zieliński, Magnus Wolke, Paweł Klaja, Michał Silarski, A. Täschner, J. Klaja, Jarosław Zdebik, T. Sefzick, and Eryk Czerwiński

Subjects
Physics, Nuclear and High Energy Physics, Nuclear Theory, Detector, excess energy, nucleon resonance, Spectral line, Synchrotron, law.invention, Nuclear physics, Cross section (physics), invariant mass, excitation function, law, drift chamber, Physics::Accelerator Physics, Invariant mass, Nuclear Experiment, Excess energy
Abstract

Proton-proton and proton-eta invariant mass distributions and the total cross section for the pp to pp eta reaction have been determined near the threshold at an excess energy of Q=10 MeV. The experiment has been conducted using the COSY-11 detector setup and the cooler synchrotron COSY. The determined invariant mass spectra reveal significant enhancements in the region of low proton-proton relative momenta, similarly as observed previously at higher excess energies of Q=15.5 MeV and Q= 40MeV.

Published
2009

5. Measurement of the η→3π0 Dalitz plot distribution with the WASA detector at COSY

Author

H. Schneider, Paweł Klaja, R. Siudak, W. Zipper, H. Ohm, C. Adolph, M. Berłowski, B Hoeistad, M. Wolke, Hans Calén, Kjell Fransson, Stanisław Kistryn, H. Yamaoka, Serdyuk, Himani Bhatt, N. Paul, A. Magiera, Jozef Zlomanczuk, B. Kamys, C. Ekström, T. Johansson, D Duniec, B. Kłos, M. Buescher, O. Khakimova, U Bechstedt, D. Prasuhn, N. Shah, H. Clement, K. Grigoryev, T. Skorodko, N.M. Piskunov, T. Tolba, N Milke, R Jany, J. Bisplinghoff, J Majewski, Andrzej Kupsc, T Smolinski, A Winnemoeller, Rafał Czyżykiewicz, T. Sefzick, Wolfgang Scobel, H Machner, Akira Yamamoto, A. Bondar, W Migdal, M. Mikirtychiants, B. Borasoy, O Miklukho, M. Siemaszko, Christoph Hanhart, P Vlasov, P. Podkopał, Wojciech Krzemien, P. Kulessa, W. Erven, L. Jarczyk, L. Yurev, X. Yuan, W Weglorz, R. Maier, Alexander Schmidt, Zbigniew Rudy, W. Eyrich, K. Pysz, W. Schroeder, U.-G. Meissner, M Mittag, I Zychor, K. Zwoll, T. Rausmann, Aleksandra Wrońska, A Nawrot, A. Khoukaz, Eryk Czerwiński, J Rachowski, A Izotov, H. Stroeher, N Kimura, K Nandi, S. Schadmand, A Odoyo, Paweł Moskal, Michał Janusz, Harald Kleines, A Roy, S Belostotski, Marek Jacewicz, K Chandwani, C. Zheng, C. Pauly, G D'Orsaneo, A Heczko, Kyryanchuk, D Spoelgen, K Ulbrich, R Marciniewski, A. Pricking, R Wuestner, K. Kilian, R Salmin, Günter Kemmerling, F. Kren, A. Kuzmin, Damian Tomasz Gil, Sopov, R. Varma, W. Oelert, J Zielinski, I. Keshelashvili, F Redmer, J. Zabierowski, M. Bashkanov, J. Ritman, J. Klaja, M Angelstein, H. S. Xu, Antoni Szczurek, J. Stepaniak, Jerzy Smyrski, A Kowalczyk, A. Povtoreyko, R Nissler, P. Pluciński, Hejny, A. Trzciński, Roger Ruber, Frank Goldenbaum, O Felden, M. Hodana, Y. Petukhov, Andreas Wirzba, G. Sterzenbach, F. Hinterberger, Ralf Engels, A. Teufel, S. Kullander, and P. Fedorets

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Chiral perturbation theory, Proton, Nuclear Theory, Detector, Dalitz plot, Kinetic energy, Nuclear physics, Pion, Distribution (mathematics), Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

In the first production run of the WASA experiment at COSY, the eta decay into three neutral pions was measured in proton-proton interactions at a proton beam kinetic energy of 1.4 GeV. The Dalitz ...

Published
2009

6. Determination of theη′-Proton Scattering Length in Free Space

Author

A. Khoukaz, A. Täschner, Michał Silarski, Wojciech Krzemien, J. Klaja, D. Grzonka, Marcin Zieliński, W. Oelert, Eryk Czerwiński, Magnus Wolke, S. D. Bass, Paweł Moskal, T. Sefzick, B. Kamys, J. Ritman, and Jerzy Smyrski

Subjects
Excitation function, Physics, Particle physics, Meson production, Proton, 010308 nuclear & particles physics, General Physics and Astronomy, Scattering length, Free space, 01 natural sciences, Proton scattering, 0103 physical sciences, High mass, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, High energy resolution
Abstract

Taking advantage of both the high mass resolution of the COSY-11 detector and the high energy resolution of the low-emittance proton beam of the cooler synchrotron COSY, we determine the excitation function for the $pp\ensuremath{\rightarrow}pp{\ensuremath{\eta}}^{\ensuremath{'}}$ reaction close to threshold. Combining these data with previous results, we extract the scattering length for the ${\ensuremath{\eta}}^{\ensuremath{'}}$-proton potential in free space to be $\mathrm{Re}({a}_{p{\ensuremath{\eta}}^{\ensuremath{'}}})=0\ifmmode\pm\else\textpm\fi{}0.43\text{ }\text{ }\mathrm{fm}$ and $\mathrm{Im}({a}_{p{\ensuremath{\eta}}^{\ensuremath{'}}})={0.37}_{\ensuremath{-}0.16}^{+0.40}\text{ }\text{ }\mathrm{fm}$.

Published
2014

7. Determination of the η(')-proton scattering length in free space

Author

E, Czerwiński, P, Moskal, M, Silarski, S D, Bass, D, Grzonka, B, Kamys, A, Khoukaz, J, Klaja, W, Krzemień, W, Oelert, J, Ritman, T, Sefzick, J, Smyrski, A, Täschner, M, Wolke, and M, Zieliński

Abstract

Taking advantage of both the high mass resolution of the COSY-11 detector and the high energy resolution of the low-emittance proton beam of the cooler synchrotron COSY, we determine the excitation function for the pp→ppη(') reaction close to threshold. Combining these data with previous results, we extract the scattering length for the η(')-proton potential in free space to be Re(a(pη(')))=0±0.43 fm and Im(a(pη(')))=0.37(-0.16)(+0.40) fm.

Published
2014

8. Measurement of thepn→ppπ0π−reaction in search for the recently observed resonance structure indπ0π0anddπ+π−systems

Author

Di. Kirillov, H. Ströher, D. Lersch, N. Shah, G. J. Wagner, S. Schadmand, Alexander Schmidt, W. Eyrich, R. Varma, K. Grigoryev, K. Demmich, I. Ozerianska, E. Doroshkevich, W. Erven, L. Li, A. Jany, Pawel Marciniewski, Jozef Zlomanczuk, Stanisław Kistryn, Lena Heijkenskjöld, D. Prasuhn, T. Tolba, C.-O. Gullström, X. Yuan, Markus Büscher, V. Hejny, Akira Yamamoto, A. Kupść, T. Johansson, Bo Höistad, H. Bhatt, T. Sefzick, B. Kłos, A. Khoukaz, Günter Kemmerling, C. Zheng, A. Trzciński, W. Węglorz, A. Pyszniak, W. Augustyniak, M. Bashkanov, F. S. Bergmann, J. Ritman, Magnus Wolke, C. F. Redmer, Zbigniew Rudy, Izabela Ciepał, A. Goswami, V. Serdyuk, Hans Stockhorst, Frank Goldenbaum, Paweł Moskal, Rolf Stassen, G. Sterzenbach, B. Lorentz, F. Hinterberger, Jerzy Smyrski, M. Krapp, Eryk Czerwiński, M. Berłowski, Pawel Plucinski, Harald Kleines, B. Kamys, S. Sawant, R. Siudak, W. Zipper, P. Wüstner, W. Bardan, A. Magiera, P. Żuprański, L. Jarczyk, K. Pysz, P. Fedorets, Hans Calén, M. Siemaszko, T. Skorodko, Kjell Fransson, Ferdous Khan, H. P. Morsch, F. Hauenstein, J. Stepaniak, E. Stephan, K. Föhl, M. Hodana, Ankhi Roy, B. Mariański, V. Sopov, P. Goslawski, H. Clement, D. Coderre, P. Kulessa, M. Żurek, Marcin Zieliński, Basanta Kumar Nandi, J. Zabierowski, N.M. Piskunov, R. Engels, P. Podkopał, A. Pricking, Benedykt R. Jany, Antoni Szczurek, J. Klaja, D. Pszczel, R. Maier, Wojciech Krzemien, Aleksandra Wrońska, E. Perez del Rio, P. Wurm, H. Ohm, M. Mikirtychiants, Magdalena Skurzok, P. Adlarson, and K. Lalwani

Subjects
Nuclear physics, Mass enhancement, Physics, Nuclear and High Energy Physics, Roper resonance, Meson production, Pi, Analytical chemistry
Abstract

Exclusive measurements of the quasifree pn -> pp pi(0)pi(-) reaction have been performed by means of pd collisions at T-p = 1.2 GeV using the wide angle shower apparatus (WASA) detector setup at ...

Published
2013

9. Investigation of thedd→3Henπ0reaction with the FZ Jülich WASA-at-COSY facility

Author

P. Adlarson, W. Augustyniak, W. Bardan, M. Bashkanov, F. S. Bergmann, M. Berłowski, H. Bhatt, M. Büscher, H. Calén, I. Ciepał, H. Clement, D. Coderre, E. Czerwiński, K. Demmich, E. Doroshkevich, R. Engels, W. Erven, W. Eyrich, P. Fedorets, K. Föhl, K. Fransson, F. Goldenbaum, P. Goslawski, A. Goswami, K. Grigoryev, C.-O. Gullström, C. Hanhart, F. Hauenstein, L. Heijkenskjöld, V. Hejny, F. Hinterberger, M. Hodana, B. Höistad, A. Jany, B. R. Jany, L. Jarczyk, T. Johansson, B. Kamys, G. Kemmerling, F. A. Khan, A. Khoukaz, D. A. Kirillov, S. Kistryn, J. Klaja, H. Kleines, B. Kłos, M. Krapp, W. Krzemień, P. Kulessa, A. Kupść, K. Lalwani, D. Lersch, L. Li, B. Lorentz, A. Magiera, R. Maier, P. Marciniewski, B. Mariański, M. Mikirtychiants, H.-P. Morsch, P. Moskal, B. K. Nandi, H. Ohm, I. Ozerianska, E. Perez del Rio, N. M. Piskunov, P. Pluciński, P. Podkopał, D. Prasuhn, A. Pricking, D. Pszczel, K. Pysz, A. Pyszniak, C. F. Redmer, J. Ritman, A. Roy, Z. Rudy, S. Sawant, A. Schmidt, S. Schadmand, T. Sefzick, V. Serdyuk, N. Shah, M. Siemaszko, R. Siudak, T. Skorodko, M. Skurzok, J. Smyrski, V. Sopov, R. Stassen, J. Stepaniak, E. Stephan, G. Sterzenbach, H. Stockhorst, H. Ströher, A. Szczurek, T. Tolba, A. Trzciński, R. Varma, G. J. Wagner, W. Węglorz, M. Wolke, A. Wrońska, P. Wüstner, P. Wurm, A. Yamamoto, X. Yuan, J. Zabierowski, C. Zheng, M. J. Zieliński, W. Zipper, J. Złomańczuk, P. Żuprański, and M. Żurek

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Sigma, State (functional analysis), 01 natural sciences, Nuclear physics, Momentum, Cross section (physics), Norm (mathematics), Phase space, 0103 physical sciences, Neutron, Nuclear Experiment, 010306 general physics, Beam (structure)
Abstract

An exclusive measurement of the dd -> 3He n \pi 0 reaction was carried at a beam momentum of p = 1.2 GeV/c using the WASA-at-COSY facility. For the first time data on the total cross section as well as differential distributions were obtained. The data are described with a phenomenological approach based on a combination of a quasi-free model and a partial wave expansion for three-body reaction. The total cross section is found to be \sigma(tot) = (2.89 +- 0.01(stat) +- 0.06(sys) +- 0.29(norm)) \mu b. The contribution of the quasi-free processes (with the neutron being target or beam spectator) accounts for 38% of the total cross section and dominates the differential distributions in specific regions of the phase space. The remaining part of the cross section can be described within a partial wave decomposition indicating the significance of p-wave contributions in the final state.

Published
2013

10. Search forη-mesic4He with the WASA-at-COSY detector

Author

B. Kamys, Stanisław Kistryn, A. Goswami, Paweł Moskal, W. Zipper, D. Coderre, P. Wüstner, T. Tolba, W. Bardan, M. Bashkanov, Zbigniew Rudy, A. Kupść, Lena Heijkenskjöld, Hans Stockhorst, Rolf Stassen, A. Magiera, V. Serdyuk, D. Prasuhn, V. Hejny, T. Johansson, P. Kulessa, Eryk Czerwiński, T. Sefzick, D. Pszczel, Akira Yamamoto, Szymon Niedźwiecki, B. Kłos, K. Föhl, Harald Kleines, P. Vlasov, P. Goslawski, James Ritman, F. Hinterberger, A. Roy, R. Siudak, K. Pysz, H. Ströher, K. Lalwani, Jozef Zlomanczuk, Ferdous Khan, L. Yurev, R. Engels, Pawel Marciniewski, Frank Goldenbaum, H. Clement, K. Demmich, M. Krapp, S. Schadmand, Bo Höistad, Basanta Kumar Nandi, M. Żurek, C.-O. Gullström, Markus Büscher, P. Adlarson, G. J. Wagner, W. Węglorz, A. Pyszniak, W. Augustyniak, F. S. Bergmann, Magnus Wolke, F. Hauenstein, R. Varma, H. Bhatt, H. Ohm, Jerzy Smyrski, N. Shah, M. Hodana, W. Eyrich, B. Mariański, A. Pricking, P. Fedorets, P. Żuprański, J. Stepaniak, I. Ozerianska, M. Siemaszko, Benedykt R. Jany, J. Zabierowski, X. Yuan, D. Lersch, P. Pluciński, Alexander Schmidt, J. Klaja, Hans Calén, Antoni Szczurek, M. Mikirtychiants, Magdalena Skurzok, W. Erven, C. Zheng, Aleksandra Wrońska, E. Perez del Rio, V. Sopov, H. P. Morsch, C. F. Redmer, L. Li, P. Wurm, Wojciech Krzemien, Kjell Fransson, Marcin Zieliński, P. Podkopał, R. Maier, E. Doroshkevich, K. Grigoryev, L. Jarczyk, A. Jany, E. Stephan, M. Berłowski, T. Skorodko, A. Khoukaz, G. Sterzenbach, B. Lorentz, S. Sawant, Günter Kemmerling, A. Trzciński, and Tomasz Bednarski

Subjects
Excitation function, Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Detector, 01 natural sciences, Synchrotron, law.invention, Nuclear physics, law, 0103 physical sciences, Bound state, 010306 general physics
Abstract

An exclusive measurement of the excitation function for the dd -> (3)Hep pi(-) reaction was performed at the Cooler Synchrotron COSY-Julich with the WASA-at-COSY detection system. The data were ...

Published
2013

11. Isospin decomposition of the basic double-pionic fusion in the region of the ABC effect

Author

P. Wüstner, M. Mikirtychiants, Magdalena Skurzok, H. Ströher, K. Grigoryev, Pawel Marciniewski, Tord Johansson, V. Serdyuk, Jerzy Smyrski, A. Magiera, S. Sawant, H. Stockhorst, Frank Goldenbaum, M. Żurek, G. Sterzenbach, L. Jarczyk, C.-O. Gullström, James Ritman, Markus Büscher, M. Krapp, A. Pricking, W. Erven, B. Mariański, P. Adlarson, T. Skorodko, G. J. Wagner, A. Khoukaz, Alexander Schmidt, H. P. Morsch, X. Yuan, D. Lersch, H. Ohm, F. S. Bergmann, W. Eyrich, P. Goslawski, Magnus Wolke, R. Stassen, E. Doroshkevich, Günter Kemmerling, T. Tolba, P. Żuprański, Wojciech Krzemien, C. Zheng, A. Trzciński, A. Jany, Jozef Zlomanczuk, F. Hauenstein, K. Föhl, C. F. Redmer, Tomasz Bednarski, L. Yurev, V. Hejny, J. Stepaniak, P. Pluciński, Marcin Zieliński, K. Demmich, P. Podkopał, Lena Heijkenskjöld, M. Hodana, T. Sefzick, W. Węglorz, A. Pyszniak, W. Augustyniak, Hans Calén, K. Pysz, P. Fedorets, D. Pszczel, R. Maier, Ferdous Khan, B. Kłos, H. Bhatt, B. Lorentz, Kjell Fransson, Aleksandra Wrońska, E. Perez del Rio, L. Li, A. Goswami, F. Hinterberger, P. Wurm, M. Berłowski, P. Kulessa, Paweł Moskal, E. Stephan, S. Schadmand, Akira Yamamoto, A. Kupść, M. Bashkanov, N. Shah, K. Lalwani, R. Varma, I. Ozerianska, Benedykt R. Jany, H. Clement, Basanta Kumar Nandi, Bo Höistad, Zbigniew Rudy, R. Siudak, J. Klaja, Eryk Czerwiński, Szymon Niedźwiecki, Harald Kleines, P. Vlasov, W. Zipper, W. Bardan, D. Coderre, V. Sopov, R. Engels, D. Prasuhn, Ankhi Roy, St. Kistryn, M. Siemaszko, J. Zabierowski, Antoni Szczurek, and B. Kamys

Subjects
Nuclear reaction, Nuclear and High Energy Physics, Particle physics, fusion, +deuteron+2pi%22">p nucleon --> deuteron 2pi, Meson, Gev-C, two-pion [mass spectrum], Nuclear Theory, Hadron, isovector, FOS: Physical sciences, Elementary particle, Juelich COSY PS, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, ABC effect and resonance structure, isoscalar, 0103 physical sciences, Pi, Nuclear fusion, Collisions, ddc:530, Meson Production, Nuclear Experiment (nucl-ex), WASA, Nuclear Experiment, 010306 general physics, Physics, 010308 nuclear & particles physics, Double Pion Production, mass enhancement, Pp, energy dependence [channel cross section], Total Cross-Sections, isospin decomposition, p n, Abc Effect And Resonance Structure, double pion production, Isospin, fusion [p p], pair production [pi], Lsospin Decomposition, experimental results
Abstract

Exclusive and kinematically complete high-statistics measurements of the basic double-pionic fusion reactions $pn\rightarrow d\pi ^{0}\pi ^{0}, pn\rightarrow d\pi ^{+}\pi ^{-}$ and $pp\rightarrow d\pi ^{+}\pi ^{0}$ have been carried out simultaneously over the energy region of the ABC effect using the WASA detector setup at COSY. Whereas the isoscalar reaction part given by the $d\pi ^{0}\pi ^{0}$ channel exhibits the ABC effect, i.e. a low-mass enhancement in the $\pi \pi$ - invariant mass distribution, as well as the associated resonance structure in the total cross section, the isovector part given by the $d\pi ^{+}\pi ^{-}$ channel shows a smooth behavior consistent with the conventional t -channel $\Delta \Delta$ process. The $d\pi^{+}\pi ^{-}$ data are very well reproduced by combining the data for isovector and isoscalar contributions, if the kinematical consequences of the isospin violation due to different masses for charged and neutral pions are taken into account.

Published
2013

12. Abashian-Booth-Crowe resonance structure in the double pionic fusion to He-4

Author

R. Varma, I. Ozerianska, T. Tolba, A. Magiera, S. Schadmand, B. Mariański, P. Wuestner, K. Lalwani, B. Kamys, D. Pszczel, Hans Stockhorst, D. Lersch, Zbigniew Rudy, Rolf Stassen, Jozef Zlomanczuk, M. Berłowski, Patrik Adlarson, Benedykt R. Jany, B. Kłos, M. Buescher, C. Pauly, F. Hinterberger, T. Skorodko, F. S. Bergmann, Magnus Wolke, Eryk Czerwiński, G. Kemmerling, Frank Goldenbaum, P. Goslawski, Ankhi Roy, Stanisław Kistryn, R. Siudak, H. Ohm, W. Zipper, W. Bardan, Paweł Moskal, A. Trzciński, K. Foehl, H. Kleines, P. Vlasov, S. Sawant, Tomasz Bednarski, P. Podkopał, Lena Heijkenskjöld, J. Klaja, P. Zupranski, A. Pricking, N. Shah, D. Prasuhn, M. Bashkanov, H. Clement, Basanta Kumar Nandi, Alexander Schmidt, Wojciech Krzemien, G. Sterzenbach, B. Lorentz, E. Doroshkevich, X. Yuan, Pawel Plucinski, R. Maier, A. Jany, P. Kulessa, Marcin Zieliński, Bo Höistad, G. J. Wagner, C. Zheng, Y. Petukhov, K. Demmich, R. Engels, C. F. Redmer, A. Khoukaz, L. Yurev, W. Węglorz, K. T Brinkmann, W. Augustyniak, W. Eyrich, K. Grigoryev, J. Zabierowski, W. Erven, V. Sopov, Andrzej Kupsc, Antoni Szczurek, D. Coderre, M. Hodana, V. Hejny, Akira Yamamoto, L. Jarczyk, Carl-Oscar Gullström, M. Mikirtychiants, Magdalena Skurzok, Tord Johansson, Aleksandra Wrońska, E. Perez del Rio, Szymon Niedzwiecki, P. Wurm, Pawel Marciniewski, J. Ritman, V. Serdyuk, Jerzy Smyrski, Andzej Pyszniak, Hans Calén, Kjell Fransson, H. Stroeher, C. Husmann, L. Li, H. P. Morsch, H. Bhatt, K. Pysz, P. Fedorets, Ferdous Khan, F. Hauenstein, and J. Stepaniak

Subjects
Nuclear and High Energy Physics, Particle physics, Meson production, two-pion [mass spectrum], pair production [pi0], Juelich COSY PS, 0.4-0.7 GeV/nucleon, +helium+2pi0%22">deuteron deuteron --> helium 2pi0, 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, Nuclear fusion, ddc:530, Collisions, Meson Production, WASA, Nuclear Experiment, 010306 general physics, Inclusive Reaction, Nuclear-Matter, Physics, Range (particle radiation), Fusion, fusion [deuteron deuteron], 010308 nuclear & particles physics, Dibaryons, energy dependence [channel cross section], Nuclear matter, width [resonance], angular dependence [differential cross section], Abc Enhancement, experimental results
Abstract

Exclusive and kinematically complete high-statistics measurements of the double pionic fusion reaction dd -> He-4 pi(0)pi(0) have been performed in the energy range 0.8-1.4 GeV covering thus the region of the Abashian-Booth-Crowe effect, which denotes a pronounced low-mass enhancement in the pi pi invariant mass spectrum. The experiments were carried out with the WASA detector setup at the cooler synchrotron at Forshungszentrum Julich GmbH. Similar to the observation in the basic pn -> d pi(0)pi(0) reaction, the data reveal a correlation between the ABC effect and a resonancelike energy dependence in the total cross section. The maximum occurs at m = 2.37 GeV + 2m(N), i.e., at the same position as in the basic reaction. The observed resonance width Gamma approximate to 160 MeV can be understood from broadening due to Fermi motion of the nucleons in initial and final nuclei together with collision damping. Differential cross sections are described equally well by the hypothesis of a pn resonance formation during the reaction process.

Published
2012
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13. Abashian-Booth-Crowe Effect in Basic Double-Pionic Fusion: A New Resonance?

Author

Zbigniew Rudy, N. Shah, B. Lorentz, Alexander Schmidt, W. Schroeder, Ankhi Roy, P. Podkopał, A. Povtoreyko, Eryk Czerwiński, H. Stroeher, R. Maier, Roger Ruber, Harald Kleines, P. Vlasov, M. Wolke, V. Sopov, M. Bashkanov, Aleksandra Wrońska, M. Siemaszko, E. Perez del Rio, F. Kren, G. Sterzenbach, Hans Calén, P. Wurm, J. Stepaniak, K. Grigoryev, M. Hodana, D. Coderre, P. Goslawski, Andrzej Kupsc, H. P. Morsch, Kjell Fransson, H. Clement, H. Ohm, L. Jarczyk, Y. Petukhov, C. Adolph, X. Yuan, Jozef Zlomanczuk, W. Erven, O. Khakimova, G. J. Wagner, A. Taeschner, K. Lalwani, Annika Passfeld, Marek Jacewicz, J. Hampe, B. Mariański, P. Wuestner, Vadim Baru, A. Khoukaz, C. Zheng, K.-T. Brinkmann, Wojciech Krzemien, Frank Goldenbaum, C. F. Redmer, J. Klaja, Sven Kullander, P. Zupranski, A. Magiera, K. Pysz, Pawel Plucinski, W. Eyrich, T. Rausmann, James Ritman, B. Kłos, A. Pricking, Patrik Adlarson, P. Kulessa, Szymon Niedzwiecki, B. Kamys, M. Mikirtychiants, Andreas Wirzba, Bo Höistad, Magdalena Skurzok, Marcin Zieliński, S. Sawant, Günter Kemmerling, R. Siudak, W. Zipper, A. Trzciński, R. Engels, D. Prasuhn, Tomasz Bednarski, Tord Johansson, Michał Janusz, F. S. Bergmann, Hans Stockhorst, Rolf Stassen, C. Pauly, F. Hinterberger, W. Węglorz, W. Augustyniak, Carl-Oscar Gullström, J. Zabierowski, Antoni Szczurek, Christoph Hanhart, V. Serdyuk, Jerzy Smyrski, Stanisław Kistryn, C. Ekström, Pavel Marciniewski, Lena Heijkenskjöld, Paweł Moskal, V. Hejny, P. Fedorets, E. Doroshkevich, A. Jany, M. Berłowski, R. Varma, M. Buescher, T. Skorodko, T. Sefzick, A. Winnemoeller, S. Schadmand, K. Foehl, T. Tolba, L. Yurev, Benedykt R. Jany, Himani Bhatt, Basanta Kumar Nandi, N.M. Piskunov, and V. Grishina

Subjects
Nuclear physics, Physics, Particle physics, Fusion, ddc:550, General Physics and Astronomy, Nuclear fusion, Fusion power, Nuclear Experiment, Resonance (particle physics)
Abstract

We report on an exclusive and kinematically complete high-statistics measurement of the basic double-pionic fusion reaction pn -> d pi(0)pi(0) over the full energy region of the ABC effect, a pronounced low-mass enhancement in the pi pi-invariant mass spectrum. The measurements, which cover also the transition region to the conventional t- channel Delta Delta process, were performed with the upgraded WASA detector setup at COSY. The data reveal the Abashian-Booth-Crowe effect to be uniquely correlated with a Lorentzian energy dependence in the integral cross section. The observables are consistent with a narrow resonance with m = 2.37 GeV, Gamma approximate to 70 MeV and I(J(P)) = 0(3(+)) in both pn and Delta Delta systems. Necessary further tests of the resonance interpretation are discussed.

Published
2011

14. Studies of properties of the eta' meson at the COSY-11 facility

Author

E. Czerwiński, P. Klaja, J. Klaja, and Paweł Moskal

Subjects
Physics, Nuclear and High Energy Physics, Mass distribution, Meson, Nuclear Theory, Near threshold eta ' meson production, FOS: Physical sciences, Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Nuclear physics, Cross section (physics), Isospin, Invariant mass, High Energy Physics::Experiment, ddc:530, Nuclear Experiment (nucl-ex), Nuclear Experiment, total width
Abstract

We shortly discuss results on the isospin dependence of the eta-prime production cross section in nucleon-nucleon collisions, results of comparative analysis of the invariant mass distributions for the pp-->pp eta-prime and pp-->pp eta reactions, and we present the value of the total width of the eta-prime meson as derived directly from the mass distribution measured with the mass resolution of 0.3~MeV/c^2., 2 pages, presented at 11th International Workshop On Meson Production, Properties And Interaction (MESON 2010) 10-15 Jun 2010, Cracow, Poland

Published
2011

15. Determination of the total width of the eta' meson

Author

W. Oelert, B. Kamys, P. Wüstner, T. Sefzick, Michał Silarski, Jarosław Zdebik, Paweł Klaja, Paweł Moskal, A. Täschner, D. Grzonka, Marcin Zieliński, Damian Tomasz Gil, J. Ritman, A. Khoukaz, Jerzy Smyrski, J. Klaja, Eryk Czerwiński, M. Siemaszko, W. Zipper, Rafał Czyżykiewicz, Wojciech Krzemien, and Magnus Wolke

Subjects
Physics, Particle physics, Proton, Meson, Mass distribution, 010308 nuclear & particles physics, Hadron, Nuclear Theory, General Physics and Astronomy, FOS: Physical sciences, Elementary particle, 01 natural sciences, Particle identification, Gluon, Nuclear physics, Full width at half maximum, 0103 physical sciences, ddc:550, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract

Taking advantage of both the low-emittance proton-beam of the Cooler Synchrotron COSY and the high momentum precision of the COSY-11 detector system, the mass distribution of the eta' meson was measured with a resolution of 0.33 MeV/c^2 (FWHM), improving the experimental mass resolution by almost an order of magnitude with respect to previous results. Based on the sample of more than 2300 reconstructed pp --> pp eta' events the total width of the eta' meson was determined to be 0.226 +- 0.017(stat.) +- 0.014(syst.) MeV/c^2., 4 pages, 4 figures

Published
2010

16. Upper limit of the total cross section for thepn→pnη′reaction

Author

M. Siemaszko, Damian Tomasz Gil, Magnus Wolke, Michał Silarski, W. Oelert, B. Rejdych, J. Klaja, A. Khoukaz, W. Zipper, Paweł Moskal, S. D. Bass, Wojciech Krzemien, T. Johansson, D. Grzonka, Marcin Zieliński, P. Klaja, A. Täschner, Rafał Czyżykiewicz, Eryk Czerwiński, J. Ritman, Jerzy Smyrski, B. Kamys, Jarosław Zdebik, P. Wüstner, and T. Sefzick

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Elementary particle, Correlation function (quantum field theory), 01 natural sciences, Baryon, 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Energy (signal processing)
Abstract

The upper limit of the total cross section for the $\mathit{pn}\ensuremath{\rightarrow}\mathit{pn}{\ensuremath{\eta}}^{\ensuremath{'}}$ reaction has been determined near the kinematical threshold in the excess energy range from 0 to 24 MeV. The measurement was performed using the COSY-11 detector setup, a deuteron cluster target, and the proton beam of COSY with a momentum of 3.35 GeV$/c$. The energy dependence of the upper limit of the cross section was extracted exploiting the Fermi momenta of nucleons inside the deuteron. Comparison of the determined upper limit of the ratio ${R}_{{\ensuremath{\eta}}^{\ensuremath{'}}}=\ensuremath{\sigma}(\mathit{pn}\ensuremath{\rightarrow}\mathit{pn}{\ensuremath{\eta}}^{\ensuremath{'}})/\ensuremath{\sigma}(\mathit{pp}\ensuremath{\rightarrow}\mathit{pp}{\ensuremath{\eta}}^{\ensuremath{'}})$ with the corresponding ratio for $\ensuremath{\eta}$-meson production does not favor the dominance of the ${N}^{*}(1535)$ resonance in the production process of the ${\ensuremath{\eta}}^{\ensuremath{'}}$ meson and suggests nonidentical production mechanisms for $\ensuremath{\eta}$ and ${\ensuremath{\eta}}^{\ensuremath{'}}$ mesons.

Published
2010

17. Generalized Dalitz plot analysis of the near-thresholdpp→ppK+K−reaction in view of theK+K−final state interaction

Author

T. Sefzick, Magnus Wolke, W. Zipper, L. Jarczyk, Rafał Czyżykiewicz, W. Oelert, Paweł Klaja, Jarosław Zdebik, J. Ritman, M. Siemaszko, Jerzy Smyrski, Wojciech Krzemien, B. Kamys, D. Grzonka, Marcin Zieliński, Eryk Czerwiński, P. Wüstner, A. Täschner, Michał Silarski, A. Khoukaz, Paweł Moskal, Damian Tomasz Gil, P. Winter, and J. Klaja

Subjects
Physics, Excitation function, Nuclear and High Energy Physics, Near threshold, Mass distribution, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Analytical chemistry, Dalitz plot, Invariant mass, Scattering length, State (functional analysis), Atomic physics, Ansatz
Abstract

The excitation function for the pp{yields}ppK{sup +}K{sup -} reaction revealed a significant enhancement close to threshold that may plausibly be assigned to the influence of the pK{sup -} and K{sup +}K{sup -} final-state interactions. In an improved reanalysis of COSY-11 data for the pp{yields}ppK{sup +}K{sup -} reaction at excess energies of Q=10 and 28 MeV, including the proton-K{sup -} interaction, the enhancement is confirmed. Invariant mass distributions for the two- and three-particle subsystems allow us to test at low excess energies the ansatz and parameters for the description of the interaction in the ppK{sup +}K{sup -} system as derived from the COSY-ANKE data. Finally, based for the first time on the low-energy K{sup +}K{sup -} invariant mass distributions and the generalized Dalitz plot analysis, we estimate the scattering length for the K{sup +}K{sup -} interaction to be |Re(a{sub K{sup +}}{sub K{sup -}})|=0.5{sub -0.5}{sup +4.0} fm and Im(a{sub K{sup +}}{sub K{sup -}})=3.0{+-}3.0 fm.

Published
2009

19. Measurement of the invariant mass distributions for the reaction at excess energy of

Author

W. Zipper, Rafał Czyżykiewicz, D. Grzonka, Marcin Zieliński, Eryk Czerwiński, Paweł Klaja, M. Wolke, M. Siemaszko, Jarosław Zdebik, J. Ritman, T. Sefzick, Kanzo Nakayama, Jerzy Smyrski, Paweł Moskal, A. Deloff, B. Kamys, W. Oelert, A. Khoukaz, Michał Silarski, L. Jarczyk, A. Täschner, J. Klaja, and Damian Tomasz Gil

Subjects
Physics, Nuclear and High Energy Physics, Proton, Meson, 010308 nuclear & particles physics, Nuclear Theory, Detector, 01 natural sciences, 7. Clean energy, Synchrotron, law.invention, Nuclear physics, law, 0103 physical sciences, Physics::Accelerator Physics, Invariant mass, Nuclear Experiment, 010306 general physics, Excess energy, Beam (structure)
Abstract

The proton–proton and proton–η′η′ invariant mass distributions have been determined for the pp→ppη′pp→ppη′ reaction at an excess energy of Q=16.4 MeVQ=16.4 MeV. The measurement was carried out using the COSY-11 detector setup and the proton beam of the cooler synchrotron COSY. The shapes of the determined invariant mass distributions are similar to those of the pp→ppηpp→ppη reaction and reveal an enhancement for large relative proton–proton momenta. This result, together with the fact that the proton–η interaction is much stronger that the proton–η′η′ interaction, excludes the hypothesis that the observed enhancement is caused by the interaction between the proton and the meson.

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20. 3D Printed Drug Delivery Systems in Action-Magnetic Resonance Imaging and Relaxometry for Monitoring Mass Transport Phenomena.

Author

Baran E, Birczyński A, Milanowski B, Klaja J, Nowak P, Dorożyński P, and Kulinowski P

Subjects
Drug Liberation, Indoles chemistry, Printing, Three-Dimensional, Polyethylene Glycols chemistry, Magnetic Resonance Imaging methods, Drug Delivery Systems
Abstract

The hypothesis of the study was that (1) 3D printed drug delivery systems (DDS) could be characterized in situ during drug release using NMR/MRI techniques in terms of mass transport phenomena description (interfacial phenomena), particularly for systems dealing with two mobile phases (e.g., water and low molecular weight liquid polymer); (2) consequently, it could be possible to deduce how these interfacial mass transport phenomena influence functional properties of 3D printed DDS. Matrix drug delivery systems, prepared using masked stereolithography (MSLA), containing poly(ethylene glycol) diacrylate (PEGDA) and low molecular weight polyethylene glycol (PEG) with ropinirole hydrochloride (RH) were studied as example formulations. The PEGDA to PEG (mobile phase) concentration ratio influenced drug release. It was reflected in spatiotemporal changes in parametric T 2 relaxation time (T 2 ) and amplitude (A) images obtained using magnetic resonance imaging (MRI) and T 1 -T 2 relaxation time correlations obtained using low-field time-domain nuclear magnetic resonance (LF TD NMR) relaxometry during incubation in water. For most of the tested formulations, two signal components related to PEG and water were assessed in the hydrated matrices by MRI relaxometry (parametric T 2 /A images). The PEG component faded out due to outward PEG diffusion and was gradually replaced by the water component. Both components spatially and temporally changed their parameters, reflecting evolving water-polymer interactions. The study shows that dynamic phenomena related to bidirectional mass transport can be quantified in situ using NMR and MRI techniques to gain insight into drug release mechanisms from 3D printed DDS systems.

Published
2024
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21. Hydration Patterns in Sodium Alginate Polymeric Matrix Tablets-The Result of Drug Substance Incorporation.

Author

Juszczyk E, Kulinowski P, Baran E, Birczyński A, Klaja J, Majda D, Garcia-Montoya E, Węglarz WP, and Dorożyński P

Abstract

The purpose was to show, using destructive/nondestructive methods, that the interplay between water, tablet structure, and composition determine the unique spatiotemporal hydration pattern of polymer-based matrices. The tablets containing a 1:1 w / w mixture of sodium alginate with salicylic acid (ALG/SA) or sodium salicylate (ALG/SNA) were studied using Karl Fischer titration, differential scanning calorimetry, X-ray microtomography, and magnetic resonance imaging. As the principal results, matrix specific features were detected, e.g., "locking" of the internal part of the matrix (ALG/SA); existence of lamellar region associated with detection of free/freezing water (ALG/SA); existence of water penetrating the matrix forming specific region preceding infiltration layer (ALG/SNA); switch in the onset temperature of endothermic water peak associated with an increase in the fraction of non-freezing water weight per dry matrix weight in the infiltration layer (ALG/SNA). The existence of complicated spatiotemporal hydration patterns influenced by matrix composition and molecular properties of constituents has been demonstrated.

Published
2021
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22. Spatiotemporal characterization of hydration process of asymmetric polymeric wound dressings for decubitus ulcers.

Author

Górska A, Dorożyński P, Węglarz WP, Jasiński K, Kurek M, Jachowicz R, Klaja J, and Kulinowski P

Subjects
Humans, Bandages, Membranes, Artificial, Polyvinyl Alcohol chemistry, Pressure Ulcer therapy
Abstract

Pressure ulcers belong to the most chalenging clinical problems. As hydration level of such wounds is important for optimal healing, preparation of new wound dressing (WD) materials for pressure ulcers requires thorough in vitro evaluation as prerequisite to final in vivo testing. The aims of the study were to: (a) develop a simple method of preparation of asymmetric polymeric membrane, (b) to propose a set of in vitro methods for membrane characterization during hydration. A polyvinyl alcohol asymmetric membrane with homogeneous skin layer and porous spongy layer was developed with nonadhesive properties and ability to absorb and retain the water. Complementary methods, including magnetic resonance imaging, allowed quantitative assessment of spatiotemporal aspects of membrane hydration, that is, global water uptake; swelling; local hydration in terms of proton density mapping; spatial distribution of T 2 relaxation time; Young's modulus; piercing resistance. The proposed method of initial wound dressing evaluation seems to be promising to compare various WD formulations, to assess the time required to prepare WD membrane to be applied to the wound and to assess how long WD retains desired working properties. The developed asymmetric membrane seems to be a good candidate for further evaluation. It was found that: Young's modulus of hydrated membrane was comparable to those of human skin; asymmetrical structure was retained during the entire hydration period; each layer had its own distinct, hydration related, properties and their spatiotemporal evolution; relatively slow changes of membrane properties during the potential WD application time-span of several hours was observed. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 843-853, 2018., (© 2017 Wiley Periodicals, Inc.)

Published
2018
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23. Multimodal approach to characterization of hydrophilic matrices manufactured by wet and dry granulation or direct compression methods.

Author

Kulinowski P, Woyna-Orlewicz K, Obrał J, Rappen GM, Haznar-Garbacz D, Węglarz WP, Jachowicz R, Wyszogrodzka G, Klaja J, and Dorożyński PP

Subjects
Delayed-Action Preparations, Drug Liberation, Hydrophobic and Hydrophilic Interactions, Magnetic Resonance Imaging, Pressure, Quetiapine Fumarate chemistry, Solubility, Tablets, X-Ray Microtomography, Chemistry, Pharmaceutical methods, Drug Compounding methods, Quetiapine Fumarate administration & dosage, Technology, Pharmaceutical methods
Abstract

Purpose of the Research: The purpose of the research was to investigate the effect of the manufacturing process of the controlled release hydrophilic matrix tablets on their hydration behavior, internal structure and drug release. Direct compression (DC) quetiapine hemifumarate matrices and matrices made of powders obtained by dry granulation (DG) and high shear wet granulation (HS) were prepared. They had the same quantitative composition and they were evaluated using X-ray microtomography, magnetic resonance imaging and biorelevant stress test dissolution., Principal Results: Principal results concerned matrices after 2 h of hydration: (i) layered structure of the DC and DG hydrated tablets with magnetic resonance image intensity decreasing towards the center of the matrix was observed, while in HS matrices layer of lower intensity appeared in the middle of hydrated part; (ii) the DC and DG tablets retained their core and consequently exhibited higher resistance to the physiological stresses during simulation of small intestinal passage than HS formulation., Major Conclusions: Comparing to DC, HS granulation changed properties of the matrix in terms of hydration pattern and resistance to stress in biorelevant dissolution apparatus. Dry granulation did not change these properties-similar hydration pattern and dissolution in biorelevant conditions were observed for DC and DG matrices., (Copyright © 2015 Elsevier B.V. All rights reserved.)

Published
2016
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24. Determination of the η(')-proton scattering length in free space.

Author

Czerwiński E, Moskal P, Silarski M, Bass SD, Grzonka D, Kamys B, Khoukaz A, Klaja J, Krzemień W, Oelert W, Ritman J, Sefzick T, Smyrski J, Täschner A, Wolke M, and Zieliński M

Abstract

Taking advantage of both the high mass resolution of the COSY-11 detector and the high energy resolution of the low-emittance proton beam of the cooler synchrotron COSY, we determine the excitation function for the pp→ppη(') reaction close to threshold. Combining these data with previous results, we extract the scattering length for the η(')-proton potential in free space to be Re(a(pη(')))=0±0.43  fm and Im(a(pη(')))=0.37(-0.16)(+0.40)  fm.

Published
2014
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25. Abashian-Booth-Crowe effect in basic double-pionic fusion: a new resonance?

Author

Adlarson P, Adolph C, Augustyniak W, Baru V, Bashkanov M, Bednarski T, Bergmann FS, Berłowski M, Bhatt H, Brinkmann KT, Büscher M, Calén H, Clement H, Coderre D, Czerwiński E, Doroshkevich E, Ekström C, Engels R, Erven W, Eyrich W, Fedorets P, Föhl K, Fransson K, Goldenbaum F, Goslawski P, Grigoryev K, Grishina V, Gullström CO, Hampe J, Hanhart C, Heijkenskjöld L, Hejny V, Hinterberger F, Hodana M, Höistad 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, Kłos B, Kren F, Krzemień W, Kulessa P, Kullander S, Kupść A, Lalwani K, Lorentz B, Magiera A, Maier R, Marciniewski P, Mariański B, Mikirtychiants M, Moskal P, Morsch HP, Nandi BK, Niedźwiecki S, Ohm H, Passfeld A, Pauly C, del Rio EP, Petukhov Y, Piskunov N, Pluciński P, Podkopał P, Povtoreyko A, Prasuhn D, Pricking A, Pysz K, Rausmann T, Redmer CF, Ritman J, Roy A, Ruber RJ, Rudy Z, Sawant S, Schadmand S, Schmidt A, Schroeder W, 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, Ströher H, Szczurek A, Täschner A, Tolba T, Trzciński A, Varma R, Vlasov P, Wagner GJ, Węglorz W, Winnemöller A, Wirzba A, Wolke M, Wrońska A, Wüstner P, Wurm P, Yuan X, Yurev L, Zabierowski J, Zheng C, Zieliński MJ, Zipper W, Złomańczuk J, and Zuprański P

Abstract

We report on an exclusive and kinematically complete high-statistics measurement of the basic double-pionic fusion reaction pn→dπ(0)π(0) over the full energy region of the ABC effect, a pronounced low-mass enhancement in the ππ-invariant mass spectrum. The measurements, which cover also the transition region to the conventional t-channel ΔΔ process, were performed with the upgraded WASA detector setup at COSY. The data reveal the Abashian-Booth-Crowe effect to be uniquely correlated with a Lorentzian energy dependence in the integral cross section. The observables are consistent with a narrow resonance with m=2.37  GeV, Γ≈70  MeV and I(J(P))=0(3(+)) in both pn and ΔΔ systems. Necessary further tests of the resonance interpretation are discussed.

Published
2011
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26. Determination of the total width of the η' meson.

Author

Czerwiński E, Moskal P, Grzonka D, Czyzykiewicz R, Gil D, Kamys B, Khoukaz A, Klaja J, Klaja P, Krzemień W, Oelert W, Ritman J, Sefzick T, Siemaszko M, Silarski M, Smyrski J, Täschner A, Wolke M, Wüstner P, Zdebik J, Zieliński M, and Zipper W

Abstract

Taking advantage of both the low-emittance proton beam of the cooler synchrotron COSY and the high momentum precision of the COSY-11 detector system, the mass distribution of the η' meson was measured with a resolution of 0.33  MeV/c2 (FWHM), improving the experimental mass resolution by almost an order of magnitude with respect to previous results. Based on the sample of more than 2300 reconstructed pp → ppη' events, the total width of the η' meson was determined to be Γ(η') = 0.226 ± 0.017(stat) ± 0.014(syst)  MeV/c2.

Published
2010
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