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12 results on '"N.M. Piskunov"'

1. Search for the η mesic He3 in the pd→dpπ0 reaction with the WASA-at-COSY facility

Author

M. Bashkanov, Markus Büscher, Izabela Ciepał, A. Erven, A. Goswami, A.E. Bondar, H. P. Morsch, P. Fedorets, Hans Stockhorst, Akira Yamamoto, Frank Goldenbaum, B. Mariański, Steven D. Bass, Rolf Stassen, K. Fransson, Hans Calén, Magdalena Skurzok, S. Schadmand, A. Khoukaz, Satoru Hirenzaki, Günter Kemmerling, Marcin Zieliński, P. Kulessa, W. Eyrich, A. Kupść, N. Hüsken, Di. Kirillov, W. Augustyniak, D. Pszczel, H. Ohm, K. Pysz, B. Kamys, T. Sefzick, Stanisław Kistryn, T. Johansson, Wiktor Parol, W. Erven, R. Engels, P. Wüstner, Lena Heijkenskjöld, D. Prasuhn, Paweł Moskal, G. Sterzenbach, B. Lorentz, M. Żurek, D. Lersch, B. Kłos, P. Adlarson, N. G. Kelkar, V. Hejny, K. Föhl, H. Clement, N.M. Piskunov, B. Shwartz, J. Stepaniak, Jozef Zlomanczuk, M. Berłowski, H. Ströher, Pawel Marciniewski, Eryk Czerwiński, T. Skorodko, Harald Kleines, J. Ritman, S. Sawant, V. Serdyuk, A. Magiera, Jerzy Smyrski, Oleksandr Rundel, E. Stephan, K. Lalwani, Wojciech Krzemien, J. Zabierowski, Antoni Szczurek, V. Sopov, Ankhi Roy, Aleksander Khreptak, K. Grigoryev, R. Maier, Aleksandra Wrońska, E. Perez del Rio, K. Demmich, F. S. Bergmann, and Magnus Wolke

Subjects
Excitation function, Physics, Meson production, Proton, 010308 nuclear & particles physics, chemistry.chemical_element, Resonance, 01 natural sciences, Nuclear physics, chemistry, 0103 physical sciences, Bound state, Pi, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, 010306 general physics, Helium
Abstract

The excitation function for the $pd\rightarrow$ $d p \pi^{0}$ reaction has been measured by WASA-at-COSY experiment with the aim of searching for $^{3}\hspace{-0.03cm}\mbox{He}$-$\eta$ mesic nuclei. The measurement in the vicinity of $\eta$ meson production was performed using a ramped proton beam. The data analysis and interpretation was carried out with the assumption that the $\eta$-mesic Helium decays via the formation of an intermediate N$^{*}$(1535) resonance. No direct signal of the $\eta$-mesic nucleus is observed in the excitation function. We determine a new improved upper limit for the total cross section for the bound state production and decay in the $pd\rightarrow$ $(^{3}\hspace{-0.03cm}\mbox{He}$-$\eta)_{bound} \rightarrow$ $d p \pi^{0}$ process. It varies between 13 nb to 24 nb for the bound state with width in the range $\Gamma \in (5,50)$ MeV.

Published
2020

2. Differential cross sections for neutron-proton scattering in the region of the d*(2380) dibaryon resonance

Author

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

Subjects
Physics, Nuclear physics, Range (particle radiation), Hydrogen, chemistry, Deuterium, Scattering, chemistry.chemical_element, Neutron, Nuclear Experiment, Resonance (particle physics), Beam (structure), Differential (mathematics)
Abstract

Differential cross sections have been extracted from exclusive and kinematically complete high-statistics measurements of quasifree polarized np scattering performed in the energy region of the d*(2380) dibaryon resonance covering the range of beam energies Tn=0.98−1.29 GeV (s=2.32−2.44 GeV). The experiment was carried out with the WASA-at-COSY setup having a polarized deuteron beam impinged on the hydrogen pellet target and utilizing the quasifree process dp→np+pspectator. In this way the np differential cross section σ(Θ) was measured over a large angular range. The obtained angular distributions complement the corresponding analyzing power Ay(Θ) measurements published previously. A SAID partial-wave analysis incorporating the new data strengthens the finding of a resonance pole in the coupled D33-G33 waves.

Published
2020

3. Examination of the production of an isotensor dibaryon in the pp→ppπ+π− reaction

Author

Zbigniew Rudy, Akira Yamamoto, O. Khreptak, A. Khoukaz, Eryk Czerwiński, B. Kamys, P. Żuprański, K. Fransson, Harald Kleines, Oleksandr Rundel, R. Engels, D. Lersch, P. Wüstner, H. P. Morsch, H. Clement, Hans Calén, E. Stephan, Jozef Zlomanczuk, T. Sefzick, W. Erven, A.E. Bondar, W. Eyrich, Wiktor Parol, Markus Büscher, M. Bashkanov, N. Hüsken, Pawel Marciniewski, A. Erven, Paweł Moskal, K. Pysz, M. Berłowski, D. Pszczel, A. Magiera, P. Fedorets, J. Ritman, T. Skorodko, Izabela Ciepał, A. Goswami, Di. Kirillov, B. Mariański, V. Serdyuk, H. Ströher, Stanisław Kistryn, P. Kulessa, Jerzy Smyrski, V. Hejny, K. Föhl, I. Schätti-Ozerianska, A. Trzcinski, S. Schadmand, Hans Stockhorst, B. Shwartz, J. Stepaniak, N.M. Piskunov, Lena Heijkenskjöld, W. Augustyniak, D. Prasuhn, V. Sopov, Rolf Stassen, G. Sterzenbach, B. Lorentz, Wojciech Krzemien, W. Bardan, Günter Kemmerling, J. Zabierowski, Antoni Szczurek, Aleksandra Wrońska, Ankhi Roy, E. Perez del Rio, M. Żurek, Marcin Zieliński, R. Maier, K. Grigoryev, L. Jarczyk, S. Sawant, F. S. Bergmann, Magnus Wolke, K. Demmich, K. Lalwani, A. Kupść, T. Johansson, B. Kłos, P. Adlarson, Magdalena Skurzok, H. Ohm, and Frank Goldenbaum

Subjects
Nuclear physics, Physics, Cross section (physics), Pion, Meson, 010308 nuclear & particles physics, Isospin, 0103 physical sciences, 010306 general physics, 7. Clean energy, 01 natural sciences, Resonance (particle physics)
Abstract

The quasifree pp → ppπ+π− reaction has been measured by means of pd collisions at Tp = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region Tp = 1.08–1.36 GeV (√s = 2.35–2.46 GeV) covering thus the regions of N∗(1440) and (1232)(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp → ppπ0π0 data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor N dibaryon resonance with I (J P ) = 2(1+) produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong [Phys. Rev. Lett. 13, 815 (1964)] and more recently calculated by A. Gal and H. Garcilazo [Nucl. Phys. A 928, 73 (2014)].

Published
2019

4. Measurements of branching ratios for η decays into charged particles

Author

A. Kupść, Oleksandr Rundel, Akira Yamamoto, T. Johansson, B. Kłos, K. Fransson, E. Stephan, K. Grigoryev, B. Kamys, R. Engels, P. Wüstner, K. Pysz, Ferdous Khan, S. Sawant, Zbigniew Rudy, L. Jarczyk, V. Hejny, K. Föhl, Jozef Zlomanczuk, C.-O. Gullström, Markus Büscher, P. Fedorets, Ankhi Roy, Paweł Moskal, D. Lersch, A. Trzcinski, T. Sefzick, Marcin Zieliński, Stanisław Kistryn, A.E. Bondar, B. Shwartz, J. Stepaniak, A. Magiera, Eryk Czerwiński, R. Varma, K. Demmich, Lena Heijkenskjöld, D. Prasuhn, I. Ozerianska, Harald Kleines, G. Khatri, P. Kulessa, J. Zabierowski, Pawel Marciniewski, M. Berłowski, H. P. Morsch, W. Eyrich, Himani Bhatt, Antoni Szczurek, T. Skorodko, F. S. Bergmann, Magnus Wolke, Aleksandra Wrońska, E. Perez del Rio, A. Kuzmin, J. Ritman, P. Adlarson, N. Hüsken, V. Serdyuk, A. Pyszniak, W. Augustyniak, Jerzy Smyrski, K. Lalwani, M. Żurek, H. Ohm, H. Clement, P. Wurm, N.M. Piskunov, S. Schadmand, B. Mariański, Wojciech Krzemien, W. Erven, R. Siudak, D. Coderre, W. Bardan, M. Mikirtychiants, Magdalena Skurzok, Ulrich Wiedner, V. Sopov, D. Pszczel, R. Maier, H. Ströher, Di. Kirillov, G. Sterzenbach, B. Lorentz, A. Täschner, Günter Kemmerling, Frank Goldenbaum, P. Żuprański, Hans Calén, M. Bashkanov, A. Erven, K. Sitterberg, A. Khoukaz, Izabela Ciepał, A. Goswami, Hans Stockhorst, Rolf Stassen, and A. Zink

Subjects
Energy loss, Particle physics, Meson, Dalitz plot, Branching (polymer chemistry), 01 natural sciences, Subatomär fysik, Conversion Decays, Subatomic Physics, 0103 physical sciences, ddc:530, Gamma, Transition Form-Factors, Nuclear Experiment, 010306 general physics, Na60, Physics, Omega, 010308 nuclear & particles physics, Branching fraction, High Energy Physics::Phenomenology, Detector, Mu(+)Mu(-)Gamma, Charged particle, Crystallography, High Energy Physics::Experiment
Abstract

The WASA-at-COSY experiment has collected $3\ifmmode\times\else\texttimes\fi{}{10}^{7}$ events with $\ensuremath{\eta}$ mesons produced via the reaction $pd\ensuremath{\rightarrow}^{3}\mathrm{He}\phantom{\rule{0.16em}{0ex}}\ensuremath{\eta}$ at $\mathrm{T}=1.0\phantom{\rule{4pt}{0ex}}\mathrm{GeV}$. Using this data set, we evaluate the branching ratios of the decays $\ensuremath{\eta}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{\gamma}$, $\ensuremath{\eta}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}\ensuremath{\gamma}$, $\ensuremath{\eta}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{e}^{+}{e}^{\ensuremath{-}}$, and $\ensuremath{\eta}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}{e}^{+}{e}^{\ensuremath{-}}$. The branching ratios are normalized to the $\ensuremath{\eta}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ decay. In addition an upper limit on a $CP$-violating asymmetry in $\ensuremath{\eta}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{e}^{+}{e}^{\ensuremath{-}}$ is extracted.

Published
2016

5. ABC effect and resonance structure in the double-pionic fusion toHe3

Author

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

Subjects
Mass enhancement, Nuclear physics, Physics, Nuclear and High Energy Physics, Fusion, Near threshold, Angular distribution, Meson production, Dalitz plot, Pi interaction, Nuclear matter
Abstract

Exclusive and kinematically complete measurements of the double pionic fusion to He-3 have been performed in the energy region of the so-called ABC effect, which denotes a pronounced low-mass enhan ...

Published
2015

6. Measurement of theη→π+π−π0Dalitz plot distribution

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Distribution (number theory), Meson, 010308 nuclear & particles physics, 0103 physical sciences, Dalitz plot, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, 01 natural sciences
Abstract

The Dalitz plot distribution of the $\ensuremath{\eta}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ decay is determined by using a data sample of $1.2\ifmmode\times\else\texttimes\fi{}{10}^{7}$ $\ensuremath{\eta}$ mesons from the $pd\ensuremath{\rightarrow}^{3}\mathrm{He}\ensuremath{\eta}$ reaction at 1 GeV collected by the WASA detector at COSY.

Published
2014

7. 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

8. Measurement of tensor polarization of deuterons from3He→d+pbreakup at momenta from 4.60 to 5.66 GeV/c

Author

L. V. Malinina, J. Ball, J.-L. Sans, R. Gacougnolle, R.A. Kunne, J. L. Boyard, L. Bimbot, E. Tomasi-Gustafsson, E. A. Strokovsky, V. A. Punjabi, S. Nedev, P. Courtat, L. B. Golovanov, J. Yonnet, R. Skowron, I.M. Sitnik, C. F. Perdrisat, N.M. Piskunov, Y. Bisson, M. K. Jones, Yu. T. Borzunov, M. Boivin, and T. Hennino

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Elementary particle, Few-body systems, 01 natural sciences, 7. Clean energy, Nuclear physics, Baryon, Helium-3, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Nucleon, Isotopes of helium
Abstract

The tensor polarization ${\ensuremath{\rho}}_{20}$ of deuterons emitted in the ${}^{1}\mathrm{H}{(}^{3}\mathrm{He},\stackrel{\ensuremath{\leftrightarrow}}{d})X$ reaction at ${0}^{\ensuremath{\circ}}$ in the laboratory system was measured at the Saturne National Laboratory in Saclay using the SPES-4 spectrometer with the HYPOM polarimeter located downstream from its focal plane. The momentum of the detected deuterons was kept fixed at 3.77 GeV$/c$, while the momentum of the ${}^{3}\mathrm{He}$ beam was varied from 4.60 to 5.66 GeV$/c$, thus providing a range of internal momenta $k$ of the deuteron in ${}^{3}\mathrm{He}$ from 0 up to 0.4 GeV$/c$. The data obtained are compared with theoretical predictions.

Published
2011

9. Experimental study of thep+6Li→η+7Bereaction 11.3 MeV above threshold

Author

P. Hawranek, D. Protic, A. Chatterjee, Di. Kirillov, D. Kolev, M. Kravcikova, R. Jahn, A. Budzanowski, K. Kilian, S. Kliczewski, G. Martinska, N.M. Piskunov, G. Vankova, J. Urban, B. J. Roy, P. von Rossen, Da. Kirillov, I.M. Sitnik, R. Maier, M. Lesiak, J. Lieb, Hartmut Machner, Vivekanand Jha, J. Ritman, R. Tsenov, A. Magiera, and R. Siudak

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Meson, Hadron, High Energy Physics::Experiment, Elementary particle, Atomic physics, Nuclear Experiment, Isotopes of beryllium, Ground state, Omega, Boson
Abstract

The cross section for the reaction p+{sup 6}Li{yields}{eta}+{sup 7}Be was measured at an excess energy of 11.28 MeV above threshold by detecting the recoiling {sup 7}Be nuclei. A dedicated set of focal plane detectors was built for the magnetic spectrograph Big Karl and was used for identification and four-momentum measurement of {sup 7}Be. A differential cross section of nb/(d{sigma}/d{Omega})=[0.69{+-}0.20(stat.){+-}0.20(syst.)] sr for the ground state plus 1/2{sup -} was measured. The result is compared to model calculations.

Published
2010

10. Precision measurements of thepp→π+pnandpp→π+dreactions: Importance of long-range and tensor force effects

Author

R. Jahn, R. Maier, S. Kliczewski, R. Siudak, Di. Kirillov, J. Lieb, Vivekanand Jha, K. Kilian, A. Magiera, D. Kolev, Da. Kirillov, Colin Wilkin, S. Nedev, A. Budzanowski, J. Ritman, R. Tsenov, H. J. Stein, M. Lesiak, M. Kravcikova, F. Hinterberger, J.A. Niskanen, G. Vankova, N.M. Piskunov, P. Hawranek, A. Chatterjee, I.M. Sitnik, J. Urban, B. J. Roy, Hartmut Machner, P. von Rossen, G. Martinska, and D. Protic

Subjects
Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Hadron, Elementary particle, 01 natural sciences, 7. Clean energy, Nuclear physics, Baryon, Momentum, Pion, 0103 physical sciences, Tensor, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

Inclusive measurements of pion production in proton-proton collisions in the forward direction were undertaken at 400 and 600 MeV at the cooler synchrotron (COSY) at Forschungszentrum Julich using the Big Karl spectrograph. The high resolution in the pi(+) momentum ensured that there was an unambiguous separation of the pp ->pi(+)d/pi(+)pn channels. Using these and earlier data, the ratio of the production cross sections could be followed through the Delta region and compared with the predictions of final state interaction theory. Deviations are strongly influenced by long-range terms in the production operator and the tensor force in the final pn system. These have been investigated in a realistic pp ->pi(+)d/pi(+)pn calculation that includes S reversible arrow D channel coupling between the final nucleons. A semiquantitative understanding of the observed effects is achieved. .

Published
2009

11. π0−ηmeson mixing inpd3Hπ+/3Heπ0reactions

Author

T. Kutsarova, P. Hawranek, A. Magiera, Hartmut Machner, J. Urban, B. J. Roy, P. von Rossen, R. Siudak, I.M. Sitnik, J. Ilieva, W. Klimala, K. Kilian, M. Kravcikova, D. Kirilov, M. Uličný, N.M. Piskunov, S. Kliczewski, M. Abdel-Bary, R. Tsenov, Jerzy Smyrski, Lubomir Pentchev, D. Kolev, Kistryn, Aleksandra Wrońska, J. Lieb, and G. Martinska

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Mixing (physics)
Published
2003

12. Analyzing powers of inelasticdpscattering in the energy region of Δ and Roper resonances excitation

Author

E. A. Strokovsky, A. V. Kravtsov, C. F. Perdrisat, I. I. Tkach, J.C. Jourdain, S. S. Volkov, Egle Tomasi-Gustafsson, A. N. Prokofiev, Clive Ellegaard, R.A. Kunne, M. Boivin, P. Morsch, M. Roy-Stephan, I.M. Sitnik, E. M. Orischin, J. L. Boyard, W. Augustyniak, L. Fahri, V. A. Punjabi, V. A. Mylnikov, B. Ramstein, M. Skousen, A. A. Zhdanov, P. Radvanyi, Liudmila Malinina, N.M. Piskunov, M. Kagarlis, J.S. Larsen, G. D. Alkhazov, P. Zupranski, B. V. Razmyslovich, Ronald Dahl, T. Hennino, C. Gaarde, and Martin Drews

Subjects
Physics, Delta, Nuclear physics, Nuclear and High Energy Physics, Quasielastic scattering, Scattering, Inelastic scattering, Deep inelastic scattering, Excitation, Energy (signal processing), Inelastic neutron scattering
Published
2001

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