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1. The KOALA Experiment for (anti)proton-proton Elastic Scattering

Author

Zhou, Yong, Xu, Huagen, Bechstedt, Ulf, Böker, Jürgen, Demary, Nils, Goldenbaum, Frank, Grzonka, Dieter, Hetzel, Jan, Khoukaz, Alfons, Klehr, Franz, Krings, Thomas, Lessmann, Lukas, Mannweiler, Christian, Prasuhn, Dieter, Quilitzsch, Steffen, Ritman, James, Schadmand, Susan, Sefzick, Thomas, Stassen, Rolf, and Wüstner, Peter

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The KOALA experiment measures the differential cross section of (anti)proton-proton elastic scattering over a wide range of four-momentum transfer squared 0.0008 < |t| < 0.1 (GeV/c)$^2$ . The forward scattering parameters and the absolute luminosity can be deduced by analyzing the characteristic shape of the differential cross-section spectrum. The experiment is based on fixed target kinematics and uses an internal hydrogen cluster jet target. The wide range of |t| is achieved by measuring the total kinetic energy of the recoil protons near 90{\deg} with a recoil detector, which consists of silicon and germanium single-sided strip sensors. The energy resolution of the recoil detector is better than 30 keV (FWHM). A forward detector consisting of two layers of plastic scintillators measures the elastically scattered beam particles in the forward direction close to the beam axis. It helps suppress the large background at small recoil angles and improves the identification of elastic scattering events in the low |t| range. The KOALA setup has been installed and commissioned at COSY in order to validate the detector by measuring the proton-proton elastic scattering. The results from this commissioning are presented here.

Published
2021
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2. Strange Hadron Spectroscopy with Secondary KL Beam in Hall D

Author

KLF Collaboration, Amaryan, Moskov, Bashkanov, Mikhail, Dobbs, Sean, Ritman, James, Stevens, Justin, Strakovsky, Igor, Adhikari, Shankar, Asaturyan, Arshak, Austregesilo, Alexander, Baalouch, Marouen, Baturin, Vitaly, Berdnikov, Vladimir, Becerra, Olga Cortes, Black, Timothy, Boeglin, Werner, Briscoe, William, Brooks, William, Burkert, Volker, Chudakov, Eugene, Clash, Geraint, Cole, Philip, Crede, Volker, Day, Donal, Degtyarenko, Pavel, Deur, Alexandre, Dodge, Gail, Dolgolenko, Anatoly, Eidelman, Simon, Egiyan, Hovanes, Epifanov, Denis, Eugenio, Paul, Fegan, Stuart, Filippi, Alessandra, Furletov, Sergey, Gan, Liping, Garibaldi, Franco, Gasparian, Ashot, Gavalian, Gagik, Glazier, Derek, Gleason, Colin, Goryachev, Vladimir, Guo, Lei, Hamilton, David, Hayrapetyan, Avetik, Huber, Garth, Hurley, Andrew, Hyde, Charles, Illari, Isabella, Ireland, David, Jaegle, Igal, Joo, Kyungseon, Kakoyan, Vanik, Kalicy, Grzegorz, Kamel, Mahmoud, Keith, Christopher, Kim, Chan Wook, Klemp, Eberhard, Krafft, Geoffrey, Kuhn, Sebastian, Kuleshov, Sergey, Laptev, Alexander, Larin, Ilya, Lawrence, David, Lersch, Daniel, Li, Wenliang, Luckas, Kevin, Lyubovitskij, Valery, Mack, David, McCaughan, Michael, Manley, Mark, Marukyan, Hrachya, Matveev, Vladimir, Mocanu, Mihai, Mokeev, Viktor, Meyer, Curtis, McKinnon, Bryan, Nerling, Frank, Nicol, Matthew, Niculescu, Gabriel, Ostrovidov, Alexander, Papandreou, Zisis, Park, KiJun, Pasyuk, Eugene, Pauli, Peter, Pentchev, Lubomir, Phelps, William, Price, John, Reinhold, Jorg, Romanov, Dimitri, Salgado, Carlos, Satogata, Todd, Schadmand, Susan, Schertz, Amy, Schmidt, Axel, Sober, Daniel, Somov, Alexander, Somov, Sergei, Tarasov, Victor, Taylor, Simon, Thiel, Annika, Urciuoli, Guido Maria, Szumila-Vance, Holly, Watts, Daniel, Weinstein, Lawrence, Whitlatch, Timothy, Wickramaarachchi, Nilanga, Wojtsekhowski, Bogdan, Zachariou, Nicholas, Zarling, Jonathan, Zhang, Jixie, Anisovich, Alexey, Bazavov, Alexei, Bellwied, Rene, Bernard, Veronique, Colangelo, Gilberto, Cieply, Ales, Doring, Michael, Eskanderian, Ali, Goity, Jose, Haberzettl, Helmut, Hadzimehmedovic, Mirza, Jaffe, Robert, Kopeliovich, Boris, Leutwyler, Heinrich, Mai, Maxim, Mart, Terry, Matveev, Maxim, Meissner, Ulf-G., Morningstar, Colin, Moussallam, Bachir, Nakayama, Kanzo, Ochs, Wolfgang, Oh, Youngseok, Omerovic, Rifat, Osmanovic, Hedim, Oset, Eulogio, Palano, Antimo, Pelaez, Jose, Pilloni, Alessandro, Polyakov, Maxim, Richards, David, Rodas, Arkaitz, Riska, Dan-Olof, de Elvira, Jacobo Ruiz, Ryu, Hui-Young, Santopinto, Elena, Sarantsev, Andrey, Stahov, Jugoslav, Svarc, Alfred, Szczepaniak, Adam, Workman, Ronald, and Zou, Bing-Song

Subjects
Nuclear Experiment, High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear Theory
Abstract

We propose to create a secondary beam of neutral kaons in Hall D at Jefferson Lab to be used with the GlueX experimental setup for strange hadron spectroscopy. The superior CEBAF electron beam will enable a flux on the order of $1\times 10^4~K_L/sec$, which exceeds the flux of that previously attained at SLAC by three orders of magnitude. The use of a deuteron target will provide first measurements ever with neutral kaons on neutrons. The experiment will measure both differential cross sections and self-analyzed polarizations of the produced $\Lambda$, $\Sigma$, $\Xi$, and $\Omega$ hyperons using the GlueX detector at the Jefferson Lab Hall D. The measurements will span CM $\cos\theta$ from $-0.95$ to 0.95 in the range W = 1490 MeV to 2500 MeV. The new data will significantly constrain the partial wave analyses and reduce model-dependent uncertainties in the extraction of the properties and pole positions of the strange hyperon resonances, and establish the orbitally excited multiplets in the spectra of the $\Xi$ and $\Omega$ hyperons. Comparison with the corresponding multiplets in the spectra of the charm and bottom hyperons will provide insight into he accuracy of QCD-based calculations over a large range of masses. The proposed facility will have a defining impact in the strange meson sector through measurements of the final state $K\pi$ system up to 2 GeV invariant mass. This will allow the determination of pole positions and widths of all relevant $K^\ast(K\pi)$ $S$-,$P$-,$D$-,$F$-, and $G$-wave resonances, settle the question of the existence or nonexistence of scalar meson $\kappa/K_0^\ast(700)$ and improve the constrains on their pole parameters. Subsequently improving our knowledge of the low-lying scalar nonet in general., Comment: Final version of the KLF Proposal [C12-19-001] approved by JLab PAC48. The intermediate version of the proposal was posted in arXiv:1707.05284 [hep-ex]. 103 pages, 52 figures, 8 tables, 324 references. Several typos were fixed

Published
2020

3. Study of Silicon Photomultiplier Radiation Hardness with Proton Beam from the JULIC Cyclotron

Author

Tolba, Tamer, Grzonka, Dieter, Sefzick, Thomas, and Ritman, James

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

In this work we study the performance of silicon photomultiplier (SiPM) light sensors after exposure to the JULIC cyclotron proton beam, of energy $\sim$ 39 MeV, relative to their performance before exposure. The SiPM devices used in this study show a significant change in their behavior and downward shift of their breakdown voltage by as much as $\sim$ 0.4$\pm$0.1 V. Single photon measurements appear to be no longer possible for the SiPMs under study after exposure to a dose of $\sim$ 0.2 Gy (corresponding to an integrated proton flux of $\sim$$\phi_{p}$=1.06x10$^{8}$ p/cm$^{2}$). No visible damage to the surface of the devices was caused by the exposure., Comment: 19 pages, 9 figures. arXiv admin note: text overlap with arXiv:1807.03007

Published
2020

4. Implementation of GENFIT2 as an experiment independent track-fitting framework

Author

Bilka, Tadeas, Braun, Nils, Hauth, Thomas, Kuhr, Thomas, Lavezzi, Lia, Metzner, Felix, Paul, Stephan, Prencipe, Elisabetta, Prim, Markus, Rauch, Johannes, Ritman, James, Schlueter, Tobias, and Spataro, Stefano

Subjects
Physics - Data Analysis, Statistics and Probability, Physics - Instrumentation and Detectors
Abstract

The GENFIT toolkit, initially developed at the Technische Universitaet Muenchen, has been extended and modified to be more general and user-friendly. The new GENFIT, called GENFIT2, provides track representation, track-fitting algorithms and graphic visualization of tracks and detectors, and it can be used for any experiment that determines parameters of charged particle trajectories from spacial coordinate measurements. Based on general Kalman filter routines, it can perform extrapolations of track parameters and covariance matrices. It also provides interfaces to Millepede II for alignment purposes, and RAVE for the vertex finder. Results of an implementation of GENFIT2 in basf2 and PandaRoot software frameworks are presented here., Comment: 41 pages 24 figures, 1 table. Paper submitted to NIM

Published
2019

5. Application of the time-dependent charge asymmetry method for longitudinal position determination in prototype proportional chambers for the PANDA experiment

Author

Sokolov, Andrey, Ritman, James, and Wintz, Peter

Subjects
Nuclear Experiment
Abstract

The PANDA collaboration intends to build a state-of-the-art detector to study the physics of antiproton annihilation in the charm mass region at the future FAIR facility at GSI, Darmstadt. One major part of the PANDA detector is the straw tube tracker. It will consist of about 6000 individual straws grouped in 11 double layers and filled with an Ar+10%CO_2 gas mixture. The required radial spatial resolution is about 150 micron. Two different methods are considered for longitudinal coordinate measurements - skewed double layers and a novel method based on the time-dependent charge asymmetry. The latter method is presented in this article., Comment: 18 pages, 13 figures, Preprint submitted to NIM A

Published
2007
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6. Charmonium Physics with PANDA at FAIR

Author

Ritman, James

Subjects
High Energy Physics - Experiment
Abstract

One component of the future international Facility for Antiproton and Ion Research - FAIR is directed towards studies of hadronic matter at the sub-nuclear level with beams of antiprotons. These studies focus on two key aspects: confinement of quarks and the generation of the hadron masses. These goals will be pursued by performing precision measurements of charged and neutral decay products from antiproton-proton annihilation in the charmonium mass region. In this report an overview of the charmonium issues relevant to PANDA will be presented., Comment: Contribution to the proceedings of HQL06, Munich, October 16th-20th 2006

Published
2007

8. New results on light nuclei, hyperons and hypernuclei from HADES (HADES collaboration)

Author

Abou Yassine Rayane, Adamczewski-Musch Jörn, Becker Marten, Bergmann Philip, Blanco Alberto, Blume Christoph, Chlad Lukas, Chudoba Petr, Ciepał Izabela, Cordts Malte, Dreyer Jörn, Esmail Waleed Ahmed, Firlej Miroslaw, Fiutowski Tomasz, Floersheimer Henrik, Fonte Paulo, Friese Jürgen, Fröhlich Ingo, Förtsch Jörg, Galatyuk Tetyana, Gniazdowski Tomasz, Greifenhagen Robert, Grunwald Mateusz, Grzonka Dieter, Gumberidze Malgorzata, Harabasz Szymon, Heinz Thorsten, Höhne Claudia, Hojeij Fatima, Holzmann Romain, Huck Holger, Idzik Marek, Kämpfer Burkhard, Kampert Karl-Heinz, Kardan Behruz, Kedych Vadym, Koenig Ilse, Koenig Wolfgang, Kohls Marvin, Kolas Jedrzej, Korcyl Grzegorz, Kornakov Georgy, Kornas Frederic, Kotte Roland, Krueger Wilhelm, Kugler Andrej, Kulessa Pawel, Lalik Rafal, Lebedev Semen, Linev Sergey, Lopes Luís, Lorenz Manuel, Malige Akshay, Markert Jochen, Matulewicz Tomasz, Messchendorp Johan, Metag Volker, Michel Jan, Molenda Aleksandra, Moron Jakub, Müntz Christian, Nabroth Marvin, Naumann Lothar, Orliński Jan, Otto Jan-Hendrik, Parpottas Yannis, Parschau Mirco, Pauly Christian, Pechenov Vladimir, Pechenova Olga, Perez Andrade Gabriela, Pfeifer Dennis, Piasecki Krzysztof, Pietraszko Jerzy, Povar Tetiana, Prozorov Alexandr, Przygoda Witold, Pysz Krzysztof, Ramstein Béatrice, Rathod Narendra, Ritman James, Rost Adrian, Rustamov Anar, Salabura Piotr, Saraiva Joao, Schadmand Susan, Schild Niklas, Schwab Erwin, Seck Florian, Selyuzhenkov Ilya, Singh Udai, Skorpil Leon, Smyrski Jerzy, Sobiella Manfred, Spataro Stefano, Spies Simon, Stefaniak Maria, Ströbele Herbert, Stroth Joachim, Sumara Konrad, Svoboda Ondřej, Swientek Krzysztof, Szala Melanie, Tlusty Pavel, Traxler Michael, Tsertos Haralabos, Wagner Vladimir, Wasiluk Mateusz, Weber Adrian Amatus, Wendisch Christian, Wintz Peter, Zbroszczyk Hanna, Zherebtsova Elizaveta, Zielinski Marcin, and Zumbruch Peter

Subjects
Physics, QC1-999
Abstract

In March 2019 the HADES experiment recorded 14 billion Ag+Ag collisions at √sNN = 2.55 GeV as a part of the FAIR phase-0 physics program. In this contribution, we present and investigate our capabilities to reconstruct and analyze weakly decaying strange hadrons and hypernuclei emerging from these collisions. The focus is put on measuring the mean lifetimes of these particles.

Published
2022
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10. Track Finding for the PANDA Detector Based on Hough Transformations

Author

Alicke Anna, Stockmanns Tobias, and Ritman James

Subjects
Physics, QC1-999
Abstract

The PANDA experiment at FAIR (Facility for Antiproton and Ion Research) in Darmstadt is currently under construction. In order to reduce the amount of data collected during operation, it is essential to find as many true tracks as possible and to be able to distinguish them from false tracks. Part of the preparation for the experiment is the development of a fast online track finder. This work presents an online track finding algorithm based on Hough transformations, which is comparable in quality and performance to the currently best offline track finder in PANDA. In contrast to most track finders the algorithm can handle the challenge of extended hits delivered by PANDA’s central Straw Tube Tracker and thus benefit from its precise spatial resolution. Furthermore, optimization methods are presented that improved the ghost ratio as well as the speed of the algorithm by 70 %. Due to further development potential in terms of track finding for secondary particles and speed optimization on GPUs, this algorithm promises to exceed the quality and speed of other track finders developed for PANDA.

Published
2021
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11. Hyperon signatures in the PANDA experiment at FAIR

Author

Abazov, Viktor, Abramov, Victor, Achenbach, Patrick, Afedulidis, Orestis, Ahrens, Lennart, Akram, Adeel, Al-Turany, Mohammad, Albrecht, Malte, Alexeev, Gennady, Ali, Ahmed, Alicke, Anna, Amsler, Claude, Antokhin, Evgeny, Appagere, Gandharva, Augustin, Ingo, Azizi, Kazem, Balanutsa, Pavel, Balashoff, Alexander, Barnyakov, Alexander Yu., Barucca, Gianni, Belias, Anastasios, Beloborodov, Konstantin, Bergert, Roman, Bianconi, Andrea, Bleser, Sebastian, Blinov, Alexander E., Blinov, Vladimir E., Bloms, Johannes, Boca, Gianluigi, Bodenschatz, Simon, Boelger, Niels, Böhm, Merlin, Böhm, Ralph, Bökelmann, Stephan, Bölting, Michael, Bonaventura, Daniel, Boukharov, Alexander, Bracco, Gianangelo, Bragadireanu, Mario, Brand, Philipp, Brinkmann, Kai-Thomas, Brück, Lisa, Bukharova, Marina, Bukreeva, Sofia, Bumrungkoh, Denchay, Bussa, Maria Pia, Calen, Hans, Calvo, Daniela, Capozza, Luigi, Caselle, Michele, Cederwall, Bo, Chauhan, Vinee, Chernetsky, Viacheslav, Chilingaryan, Suren, Coen, Sebastian, Corell, Oliver, Crede, Volker, Dav`ı, Fabrizio, de Boer, Remco, De Remigis, Paolo, Demekhin, Alexey, Denig, Achim, Denizli, Haluk, Deppe, Harald, Derichs, Artur, Diehl, Stefan, Dippel, Lara, Dobbs, Sean, Dodokhov, Valery Kh., Dolgolenko, Anatoly, Domagala, Mariusz, Monasterio, Maria Doncel, Dormenev, Valery, Dosdall, Rene, Dritschler, Timo, Duda, Daniel, Düren, Michael, Dzhygadlo, Roman, Efremov, Alexander, Eick, Hanna, Er, Nuray, Erlen, Thorsten, Erokhin, Alexandr, Esmail, Waleed, Eugenio, Paul, Eyrich, Wolfgang, Falk, Aniko, Fedorets, Pavel, Fedotov, Gleb, Feldbauer, Florian, Ferapontov, Valeri, Filippi, Alessandra, Filo, Grzegorz, Finger Jr, Michael, Finger, Miroslav, Fink, Mario, Firlej, Miroslaw, Fiutowski, Tomasz, Flemming, Holger, Frech, Jens, Frenkel, Celina Marie, Fritsch, Miriam, Galoyan, Aida, Gandhi, Keval, Gerasimov, Alexander, Gerhardt, Andreas, Giebenhain, Kim Tabea, Glaab, Daniel, Glazier, Derek, Glennemeier-Marke, Simon, Goldenbaum, Frank, Golovanov, Georgy, Golubev, Alexander, Goncharenko, Yury, Götzen, Klaus, Gou, Boxing, Gumbert, Katja, Hagdorn, Rene, Hahn, Christopher, Hammann, Christian, Hartmann, Jan, Heine, Greta, Heinsius, Fritz-Herbert, Heinz, Andreas, Held, Thomas, Herold, Christoph, Hetz, Benjamin, Himmelreich, Mathilde, Hoek, Matthias, Hofmann, Jan, Holtmann, Tobias, Hölzken, Fabian, Huang, Guang Shun, Idzik, Marek, Ireland, David, Jary, Vladimir, Jiang, Peiyong, Jiang, Zhu, Johansson, Tord, Kalita, Kushal, Kalugin, Nikita, Kannika, Jakapat, Kantsyrev, Alexey, Karabowicz, Radoslaw, Käser, Alexander, Kazlou, Dzmitry, Kegel, Sophie, Keshk, Iman, Kesik, Grazina, Keskin, Umut, Ketzer, Bernhard, Khalid, Faiza, Khoukaz, Alfons, Klasen, Roman, Kliemt, Ralf, Kobdaj, Chinorat, Koch, Helmut, Koch, Stefan, Kohlen, Jonas, Kononov, Sergey, Kopf, Bertram, Kopmann, Andreas, Korchak, Oleksandr, Korcyl, Grzegorz, Korcyl, Krzysztof, Korzhik, Mikhail, Kosinski, Tymoteusz, Kozak, Natalia, Krauss, Steffen, Kravchenko, Evgeniy A., Kripko, Aron, Kristi, Nikolai, Kunze, Marcel, Kupsc, Andrzej, Kurilla, Udo, Küßner, Meike, Kutuzov, Sergey, Kuyanov, Ivan A., Kveton, Antonin, Ladygina, Elena, Lalik, Rafal, Lancioni, Giovanni, Lattery, Mark, Lauth, Werner, Lebiedowicz, Piotr, Lehmann, Albert, Lehmann, Dorothee, Lehmann, Inti, Leithoff, Hans Heinrich, Levin, Andrei, Li, Jinxin, Liang, Yutie, Limphirat, Ayut, Linzen, Lukas, Lisowski, Edward, Liu, Beijiang, Liu, Chunxiu, Liu, Dong, Liu, Zhenan, Loehner, Herbert, Lucherini, Vincenzo, Lühning, Jost, Luschevskaya, Elena, Lynen, Uli, Maas, Frank, Maldaner, Stephan, Malige, Akshay, Malyshev, Oleg, Manaenkov, Sergey, Manasatitpong, Keerati, Mannweiler, Christian, Marciniewski, Pawel, Marcisovsky, Michal, Marton, Johann, Maslova, Eseniya, Matusiak, Michal, Matveev, Vladimir A., Mazza, Giovanni, Melnychuk, Dmytro, Mengucci, Paolo, Merkel, Harald, Messchendorp, Johan, Micha lek, Mateusz, Miehling, Daniel, Miklukho, Oleg, Minaev, Nikolay, Missevitch, Oleg, Mochalov, Vasiliy V., Moiseev, Vyacheslav, Molenda, Aleksandra, Montalto, Luigi, Moron, Jakub, Morozov, Dmitry, Motzko, Christof, Müller, Ulrich, Müllers, Johannes, Nasawad, Thanachot, Natali, Pier Paolo, Nerling, Frank, Nogach, Larisa, Noll, Oliver, Novikov, Konstantin, Novy, Josef, Nowakowski, Krzysztof, Olgun, Asiye Tugba, Orfanitski, Sergey, Orsich, Pavel, Orth, Herbert, Panjushkin, Vsevolod, Pankonin, Sven, Panyuschkina, Alena, Paone, Nicola, Papenbrock, Michael, Pelizäus, Marc, Peng, Hai Ping, Perez-Andrade, Gabriela, Peter, Marvin, Peters, Klaus, Petersen, Jannik, Piskun, Alexey A., Pivovarov, Sergey, Pochodzalla, Josef, Pongampai, Surachai, Poznanski, Piotr, Prasuhn, Dieter, Prochazka, Ivan, Przygoda, Witold, Pyata, Evgeniy, Pysz, Krzysztof, lazek, Joanna P., Qi, Hang, Quin, Jiajia, Rai, Ajay Kumar, Rathod, Narendra, Reeh, Andreas, Regina, Jenny, Reher, Jan, Reicherz, Gerhard, Rieger, Jana, Rigato, Valentino, Rinaldi, Daniele, Ritman, James, Rocco, Elena, Piñeiro, David Rodríguez, Rosner, Christoph, Ryazantsev, Andrey, Ryzhikov, Sergey, Sachs, Matthias, Salisbury, Ben, Samartsev, Alexander, Scalise, Lorenzo, Schadmand, Susan, Schäfer, Wolfgang, Schepers, Georg, Schlimme, Soeren, Schmidt, Christian Joachim, Schmidt, Christoph, Schmidt, Mustafa, Schmitt, Lars, Schnier, Claudius, Schönning, Karin, Schubert, René, Schupp, Falk, Schwarz, Carsten, Schwiening, Joachim, Sefzick, Thomas, Seifen, Tobias, Seitz, Bjoern, Semenov, Pavel A., Seth, Kam, Sfienti, Concettina, Shein, Igor, Shen, Xiaoyan, Shimanski, Stepan, Simantathammakul, Tawanchat, Skachkova, Anna N., Slunecka, Miloslav, Smyrski, Jerzy, Snoeyink, Mark, Sobol, Bartosz, Spataro, Stefano, Stavinskiy, Alexey Valentinovich, Steinacher, Michael, Steinen, Marcell, Stepanov, Vladimir, Stockmanns, Tobias, Straube, Marcel, Strickert, Marc, Strokovsky, Evgeny A., Sun, Shengsen, Sun, Yan Kun, Suzuki, Ken, Swientek, Krzysztof, Szczurek, Antoni, Takatsch, Chris N., Tarasiuk, Jerzy, Täschner, Alexander, Tavukoglu, Zeynep, Tegner, Per-Erik, Terlecki, Przemyslaw, Thoma, Ulrike, Tikhonov, Yury, Tokmenin, Valery, Tomasek, Lukas, Tomasi-Gustafsson, Egle, Traxler, Michael, Triffterer, Tobias, Tröll, Nils, Uzhinsky, Vladimir, Varentsov, Victor, Vasiliev, Alexander N., Veretennikov, Denis, Verkheev, Alexander, Vestrick, Sophia, Virius, Miroslav, Vishnevsky, Evgeny, Vodopianov, Alexander, Volf, Michal, Voss, Bernd, Wang, Fei, Wasem, Thomas, Watts, Daniel, Weidner, Frederik, Welde, Leonard, Wendlandt, Katharina, Wenzel, Christopher, Wettig, Vincent, Wieczorek, Peter, Wiedner, Ulrich, Wintz, Peter, Wolf, Yannic, Wolff, Sahra, Wolke, Magnus, Wongprachanukul, Narupon, Wronka, Slawomir, Xiao, Ting, Xu, Huagen, Yakutin, Alexander, Yerlikaya, Seda, Yilmaz, Ali, Yu, Chunxu, Zakrzewski, Tomasz, Zaunick, Hans-Georg, Zhang, Xiao, Zhao, Guang, Zhao, Jingzhou, Zhdanov, Andrey, Zheng, Bo, Zhou, Xiao Rong, Zhu, Wenjing, Zhuravlev, Nikolai I., Zimmermann, Iris, Ziyu, Zhang, and Zwieglinski, Boguslaw

Subjects
High Energy Physics - Experiment (hep-ex), hep-ex, FOS: Physical sciences, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), nucl-ex, Nuclear Experiment, Particle Physics - Experiment, High Energy Physics - Experiment
Abstract

We present a detailed simulation study of the signatures from the sequential decays of the triple-strange pbar p -> {\Omega}+{\Omega}- -> K+{\Lambda}barK- {\Lambda} -> K+pbar{\pi}+K-p{\pi}- process in the PANDA central tracking system with focus on hit patterns and precise time measurement. We present a systematic approach for studying physics channels at the detector level and develop input criteria for tracking algorithms and trigger lines. Finally, we study the beam momentum dependence on the reconstruction efficiency for the PANDA detector.

Published
2023
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13. Study of pp → 𝚵+ ΛK- with the PANDA Detector

Author

Pütz Jennifer, Gillitzer Albrecht, Ritman James, and Stockmanns Tobias

Subjects
Physics, QC1-999
Abstract

For a deeper insight into the mechanisms of non-perturbative QCD it is essential to understand the excitation pattern of baryons. Up to now only the nucleon excitation spectrum has been subject to systematic experimental studies, while very little is known on excited states of double or triple strange baryons. In studies of antiproton-proton collisions the PANDA experiment is well-suited for a comprehensive baryon spectroscopy program in the multi-strange sector. A large fraction of the inelastic pp cross section is associated to final states with a baryon-antibaryon pair together with additional mesons, giving access to excited states both in the baryon and the antibaryon channel. For final states containing a 𝚵+ 𝚵- pair, cross sections up to µb are expected, corresponding to production rates of ~ 106/d at a luminosity L = 1031 cm-2 s-1. This study focuses on excited 𝚵- states decaying into ΛK-. A strategy to reconstruct the reaction pp → 𝚵+ 𝚵* and its charge conjugate channel with the PANDA detector will be presented.

Published
2020
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14. CTD2022: Track Finding for the PANDA Experiment

Author

Alicke, Anna, Ritman, James, and Stockmanns, Tobias

Abstract

The PANDA experiment at FAIR (Facility for Antiproton and Ion Research) in Darmstadt is a fixed target experiment currently under construction. The accelerator will be operated at energies from 1.5 GeV/c to 15 GeV/c to perform hadron specroscopy and nuclear structure studies. In this context, the production and decay of heavy baryons containing strange quarks, so called hyperons, is of particular interest. Track reconstruction is essential for hyperon detection, and this task is even more challenging because hyperons typically fly several centimeters before they decay. Therefore, secondary track finding plays a key role for PANDA. One of the most challenging parts of track finding in PANDA is the complex data typology. Usually, tracking algorithms use two-dimensional or three-dimensional hit points to perform a circle or a helix fit. PANDA also features time information to the 2D measurement, which result in cylindrical measurements that are tangent to the tracks. Different tracking algorithms dealing with these challenges will be presented. Furthermore, the reconstruction efficiency for a typical hyperon decay will be analyzed using simulated data. It will be shown that the reconstruction efficiency could be improved by 30% compared to the currently existing tracking algorithm in PANDA.

Published
2022
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15. Hyperon physics at HADES as a fair phase-0 experiment

Author

Pérez Andrade, Gabriela, Lalik, Rafal, Ritman, James, Salabura, Piotr, and Wintz, Peter

Subjects
Physics::Instrumentation and Detectors, Nuclear Theory, Physics::Accelerator Physics, High Energy Physics::Experiment, ddc:530, Nuclear Experiment
Abstract

19th International Conference on Hadron Spectroscopy and Structure in memoriam Simon Eidelman, HADRON2021, virtual, Mexico, 26 Jul 2021 - 31 Jul 2021; Suplemento de la revista mexicana de física 3(3), (2022). doi:10.31349/SuplRevMexFis.3.0308026, The HADES experiment investigates the nuclear matter and the properties of baryonic resonances. As part of the FAIR Phase-0 program, HADES is being upgraded to enable a wide range of experiments, including investigating electromagnetic decays of hyperons produced in proton-induced reactions. Feasibility studies show that the newly installed forward detectors are crucial for hyperon reconstruction. The detector upgrade and feasibility studies in preparation for the upcoming beamtimes are presented., Published by Sociedad Mexicana de Física, Ciudad de México

Published
2022
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17. New results on light nuclei, hyperons and hypernuclei from HADES (HADES collaboration)

Author

International Conference on Hypernuclear and Strange Particle Physics (14. : 2022 : Prag; Online), Abou Yassine, Rayane, Adamczewski-Musch, Jörn, Becker, Marten, Bergmann, Philip, Blanco, Alberto, Blume, Christoph, Chlad, Lukas, Chudoba, Petr, Ciepał, Izabela, Cordts, Malte, Dreyer, Jörn, Esmail, Waleed Ahmed, Firlej, Miroslaw, Fiutowski, Tomasz, Floersheimer, Henrik, Fonte, Paulo, Friese, Jürgen, Fröhlich, Ingo, Förtsch, Jörg, Galatyuk, Tetyana, Gniazdowski, Tomasz, Greifenhagen, Robert, Grunwald, Mateusz, Grzonka, Dieter, Gumberidze, Malgorzata, Harabasz, Szymon, Heinz, Thorsten, Höhne, Claudia, Hojeij, Fatima, Holzmann, Romain, Huck, Holger, Idzik, Marek, Kämpfer, Burkhard, Kampert, Karl-Heinz, Kardan, Behruz, Kedych, Vadym, Koenig, Ilse, Koenig, Wolfgang, Kohls, Marvin, Kolas, Jedrzej, Korcyl, Grzegorz, Kornakov, Georgy, Kornas, Frédéric Julian, Kotte, Roland, Krueger, Wilhelm, Kugler, Andrej, Kulessa, Pawel, Lalik, Rafał Tomasz, Lebedev, Semen, Linev, Sergey, Lopes, Luis Alberto Vieira, Lorenz, Manuel, Malige, Akshay, Markert, Jochen, Matulewicz, Tomasz, Messchendorp, Johannes Gerhardus, Metag, Volker, Michel, Jan, Molenda, Aleksandra, Moron, Jakub, Müntz, Christian, Nabroth, Marvin, Naumann, Lothar, Orliński, Jan, Otto, Jan-Hendrik, Parpottas, Yannis, Parschau, Mirco, Pauly, Christian, Pechenov, Vladimir, Pechenova, Olga, Perez Andrade, Gabriela, Pfeifer, Dennis, Piasecki, Krzysztof, Pietraszko, Jerzy, Povar, Tetiana, Prozorov, Alexandr, Przygoda, Witold, Pysz, Krzysztof, Ramstein, Béatrice, Rathod, Narendra, Ritman, James Lambrecht, Rost, Adrian, Rustamov, Anar, Salabura, Piotr, Saraiva, Joao, Schadmand, Susan, Schild, Niklas, Schwab, Erwin, Seck, Florian, Selyuzhenkov, Ilya, Singh, Udai, Skorpil, Leon, Smyrski, Jerzy, Sobiella, Manfred, Spataro, Stefano, Spies, Simon, Stefaniak, Maria, Ströbele, Herbert, Stroth, Joachim, Sumara, Konrad, Svoboda, Ondřej, Swientek, Krzysztof, Szala, Melanie, Tlusty, Pavel, Traxler, Michael, Tsertos, Haralabos, Wagner, Vladimir, Wasiluk, Mateusz, Weber, Adrian Amatus, Wendisch, Christian, Wintz, Peter, Zbroszczyk, Hanna, Zherebtsova, Elizaveta S., Zielinski, Marcin, Zumbruch, Peter W., International Conference on Hypernuclear and Strange Particle Physics (14. : 2022 : Prag; Online), Abou Yassine, Rayane, Adamczewski-Musch, Jörn, Becker, Marten, Bergmann, Philip, Blanco, Alberto, Blume, Christoph, Chlad, Lukas, Chudoba, Petr, Ciepał, Izabela, Cordts, Malte, Dreyer, Jörn, Esmail, Waleed Ahmed, Firlej, Miroslaw, Fiutowski, Tomasz, Floersheimer, Henrik, Fonte, Paulo, Friese, Jürgen, Fröhlich, Ingo, Förtsch, Jörg, Galatyuk, Tetyana, Gniazdowski, Tomasz, Greifenhagen, Robert, Grunwald, Mateusz, Grzonka, Dieter, Gumberidze, Malgorzata, Harabasz, Szymon, Heinz, Thorsten, Höhne, Claudia, Hojeij, Fatima, Holzmann, Romain, Huck, Holger, Idzik, Marek, Kämpfer, Burkhard, Kampert, Karl-Heinz, Kardan, Behruz, Kedych, Vadym, Koenig, Ilse, Koenig, Wolfgang, Kohls, Marvin, Kolas, Jedrzej, Korcyl, Grzegorz, Kornakov, Georgy, Kornas, Frédéric Julian, Kotte, Roland, Krueger, Wilhelm, Kugler, Andrej, Kulessa, Pawel, Lalik, Rafał Tomasz, Lebedev, Semen, Linev, Sergey, Lopes, Luis Alberto Vieira, Lorenz, Manuel, Malige, Akshay, Markert, Jochen, Matulewicz, Tomasz, Messchendorp, Johannes Gerhardus, Metag, Volker, Michel, Jan, Molenda, Aleksandra, Moron, Jakub, Müntz, Christian, Nabroth, Marvin, Naumann, Lothar, Orliński, Jan, Otto, Jan-Hendrik, Parpottas, Yannis, Parschau, Mirco, Pauly, Christian, Pechenov, Vladimir, Pechenova, Olga, Perez Andrade, Gabriela, Pfeifer, Dennis, Piasecki, Krzysztof, Pietraszko, Jerzy, Povar, Tetiana, Prozorov, Alexandr, Przygoda, Witold, Pysz, Krzysztof, Ramstein, Béatrice, Rathod, Narendra, Ritman, James Lambrecht, Rost, Adrian, Rustamov, Anar, Salabura, Piotr, Saraiva, Joao, Schadmand, Susan, Schild, Niklas, Schwab, Erwin, Seck, Florian, Selyuzhenkov, Ilya, Singh, Udai, Skorpil, Leon, Smyrski, Jerzy, Sobiella, Manfred, Spataro, Stefano, Spies, Simon, Stefaniak, Maria, Ströbele, Herbert, Stroth, Joachim, Sumara, Konrad, Svoboda, Ondřej, Swientek, Krzysztof, Szala, Melanie, Tlusty, Pavel, Traxler, Michael, Tsertos, Haralabos, Wagner, Vladimir, Wasiluk, Mateusz, Weber, Adrian Amatus, Wendisch, Christian, Wintz, Peter, Zbroszczyk, Hanna, Zherebtsova, Elizaveta S., Zielinski, Marcin, and Zumbruch, Peter W.

Abstract

In March 2019 the HADES experiment recorded 14 billion Ag+Ag collisions at √sNN = 2.55 GeV as a part of the FAIR phase-0 physics program. In this contribution, we present and investigate our capabilities to reconstruct and analyze weakly decaying strange hadrons and hypernuclei emerging from these collisions. The focus is put on measuring the mean lifetimes of these particles.

Published
2022

20. Track Finding with PANDA

Author

Alicke, Anna, Stockmanns, Tobias, and Ritman, James

Abstract

An overview of the various track finding methods for the barrel part of the PANDA detector will be presented. PANDA’s barrel tracking system consists of three detector parts. The innermost tracking detector is the Micro-Vertex-Detector (MVD). Surrounding the MVD is the the Straw Tube Tracker (STT), which consists of over 4200 drift tubes. Additionally, forward boosted tracks are identified by the Gas Electron Multiplier plates (GEM). The STT tubes produce coarse track information given by their tube ID and a drift time information which significantly improves the spatial resolution. The drift time information determines circles (isochrones) to which the tracks must pass tangentially.Track finding is divided into two parts: track finding for primary particles and for secondary particles. Two algorithms for each part are presented and compared. The two algorithms for primary particles are global tracking algorithms. The first algorithm is the current default track finder in PANDA and is based on adding hits to existing track assumptions. The second one is a track finder based on Hough transformations. For secondary particles a well optimized track finder based on a cellular automaton is compared to a novel approach that uses three chosen hits to find the true particle track.

Published
2022

21. Secondary Track Finding for PANDA

Author

Alicke, Anna, Stockmanns, Tobias, and Ritman, James

Abstract

Track reconstruction is essential for a meaningful physics analysis of data from complex detectors such as PANDA. For hyperon detection this task is even more challenging because hyperons typically several centimeters before they decay. Therefore, a secondary track finder for PANDA's barrel part will be presented. This algorithm, the ApolloniusTripletTrackFinder, is the only algorithm currently available at PANDA designed to find tracks not coming from the interaction point. Therefore, the finding rate for secondary particles is much higher (about 20 %-points) than for the currently existing algorithms. Combining this algorithm with a primary track finder promises to improve the reconstruction rate for hyperon decays. The performance of this algorithm for simple test cases and simulated physics processes will be presented.

Published
2022

23. The KOALA experiment for (anti)proton–proton elastic scattering

Author

Zhou, Yong, primary, Xu, Huagen, additional, Bechstedt, Ulf, additional, Böker, Jürgen, additional, Demary, Nils, additional, Goldenbaum, Frank, additional, Grzonka, Dieter, additional, Hetzel, Jan, additional, Khoukaz, Alfons, additional, Klehr, Franz, additional, Krings, Thomas, additional, Lessmann, Lukas, additional, Mannweiler, Christian, additional, Prasuhn, Dieter, additional, Quilitzsch, Steffen, additional, Ritman, James, additional, Schadmand, Susan, additional, Sefzick, Thomas, additional, Stassen, Rolf, additional, and Wüstner, Peter, additional

Published
2021
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25. Storage ring to search for electric dipole moments of charged particles: Feasibility study

Author

Monographs, CERN Yellow Reports, Abusaif, F., Böhme, C., Zupranski, P., Zurek, M., Böker, J., Borburgh, J., Canale, N., Carli, C., Ciepał, I., Ciullo, G., Contalbrigo, M., De Conto, J.-M., Dymov, S., Aggarwal, A., Felden, Olaf, Gaisser, M., Gebel, Ralf Heinz, Giese, N., Gooding, J., Grigoryev, Kirill, Grzonka, D., Haj Tahar, M., Hahnraths, T., Heberling, D., Aksentev, A., Hejny, V., Hetzel, Jan Henry, Hölscher, D., Javakhishvili, O., Jorat, L., Kacharava, A., Kamerdzhiev, Vsevolod, Karanth, S., Keshelashvili, Irakli, Koop, I., Alberdi-Esuain, B., Kulikov, A., Laihem, Karim, Lamont, M., Lehrach, A., Lenisa, P., Lomidze, I., Lomidze, N., Lorentz, B., Macharashvili, G., Magiera, A., Andres, A., Makino, K., Martin, S., Mchedlishvili, D., Meißner, U.-G., Metreveli, Z., Michaud, J., Müller, F., Nass, A., Natour, G., Nikolaev, N., Atanasov, A., Nogga, A., Okropiridze, Dachi, Pesce, A., Poncza, V., Prasuhn, Dieter, Pretz, J., Rathmann, F., Ritman, James, Rosenthal, M., Saleev, A., Barion, L., Schott, M., Sefzick, T., Senichev, Y., Shankar, R., Shergelashvili, D., Shmakova, V., Siddique, Saad, Silenko, A., Simon, M., Slim, Jamal, Basile, S., Soltner, H., Stahl, A., Stassen, Rolf, Stephenson, E., Straatmann, H., Ströher, Hans, Tabidze, M., Tagliente, G., Talman, R., Uzikov, Y., Berz, M., Valdau, Yury, Valetov, E., Vilella, E., Vitz, M., Vossebeld, J., Wagner, Tim, Weidemann, C., Wirzba, A., Wronska, A., and Wüstner, P.

Abstract

Geneva : CERN Yellow Reports: Monographs 22MB (2021). doi:10.23731/CYRM-2021-003, Published by CERN Yellow Reports: Monographs, Geneva

Published
2021
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26. Production and electromagnetic decay of hyperons: a feasibility study with HADES as a phase-0 experiment at FAIR

Author

Adamczewski-Musch, J., Belyaev, A., Blanco, A., Blume, C., Charlotte, C., Borisenko, D. S., Chlad, L., Chudoba, P., Ciepał, I., Derichs, A., Dittert, D., Dreyer, J., Esmail, W., Fateev, O., Fonte, P., Friese, J., Fröhlich, I., Förtsch, J., Galatyuk, T., Georgadze, I., Golosov, O., Golubeva, M., Greifenhagen, R., Grunwald, M., Grzonka, D., Guber, F., Gumberidze, M., Harabasz, S., Heinz, T., Heybeck, B., Höhne, C., Holona, M., Holzmann, Romain, Huck, H., Ierusalimov, A., Imre, M., Ivashkin, A., Kämpfer, B., Kampert, K-H., Kardan, B., Kedych, V., Khomyakov, V., Koenig, Ilse, Koenig, Wolfgang, Kohls, M., Kornakov, G., Kornas, F., Kotte, R., Kozela, A., Kozlov, V., Kres, I., Kuboś, J., Kugler, A., Kulessa, P., Ladygin, V., Lalik, R., Le Galliard, C., Lebedev, A., Lebedev, S., Linev, S., Lopes, L., Lorenz, M., Lykasov, G., Malige, A., Markert, J., Matulewicz, T., Michel, J., Morozov, S., Müntz, C., Naumann, L., Nowakowski, K., Orfanitsky, S., Otto, J. -H., Patel, V., Pauly, C., Pechenov, V., Pechenova, O., Perez Andrade, G., Petukhov, O., Pfeifer, D., Piasecki, K., Pietraszko, J., Prozorov, A., Przygoda, W., Pysz, K., Ramstein, B., Rathod, N., Regina, J., Reshetin, A., Reznikov, S., Rieger, J. T., Ritman, James, Rodriguez-Ramos, P., Rost, A., Rustamov, A., Salabura, P., Saraiva, J., Schild, N., Schwab, E., Schönning, K., Scozzi, F., Seck, F., Selyuzhenkov, I., Serdyuk, V., Shabanov, A., Singh, U., Smyrski, J., Sobiella, M., Spies, S., Strikhanov, M., Ströbele, H., Stroth, J., Sumara, K., Svoboda, O., Szala, M., Szewczyk, J., Taranenko, A., Tlusty, P., Traxler, M., Wagner, V., Wasiluk, M., Weber, A. A., Wendisch, C., Wintz, P., Włoch, B., Zbroszczyk, H. P., Zherebzova, E., Zhilin, A., Zinchenko, A., Zumbruch, P., HADES Collaboration, and PANDA@HADES Collaboration

Subjects
ddc:530
Abstract

The European physical journal / A 57(4), 138 (2021). doi:10.1140/epja/s10050-021-00388-w, Published by Springer, Heidelberg

Published
2021
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27. Hyperon physics at HADES as part of the FAIR Phase-0 program

Author

Wintz, Peter, Perez, Gabriela, Ritman, James, Lalik, Rafal, and Salabura, Piotr

Subjects
Physics::Instrumentation and Detectors, Nuclear Theory, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Hades investigates nuclear matter and the properties of baryonic resonances. As part of the FAIR Phase-0 program, the hardware is being upgraded to enable a wide range of experiments, including investigating electromagnetic decays of hyperons produced in proton induced reactions. Feasibility studies show that the newly installed forward detectors are crucial for hyperon reconstruction. The hardware upgrade and feasibility studies in preparation for the February 2022 beamtime are presented.

Published
2021

29. Workshop on Physics Opportunities with Proton Beams at SIS100.

Author

Ritman, James

Subjects
*PROTON beams, *PHYSICS, *NUCLEAR research, *STANDARD model (Nuclear physics), *QUANTUM chromodynamics, *HYPERONS
Abstract

The workshop "Physics Opportunities with Proton Beams at SIS100" was held at the Bergische Universität (BU) Wuppertal in February 2024. The workshop aimed to bring together experts in the field of proton-induced interactions to explore possibilities for exciting physics at the SIS100 accelerator at FAIR. The workshop included 43 invited talks and covered topics such as charm production, hadron spectroscopy, and exotic forms of baryonic-like matter. The workshop was organized by the Society for Heavy Ion Research (GSI) Helmholtz Centre for Heavy Ion Research/Facility for Antiproton and Ion Research (FAIR) in collaboration with several universities. It was supported by various organizations and institutions. [Extracted from the article]

Published
2024
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31. Multi-differential pattern of low-mass e+e− excess from s NN = 2.4 GeV Au+Au collisions with HADES

Author

Harabasz, Szymon, HADES Collaboration, and Ritman, James

Subjects
ddc:530, Nuclear Experiment
Abstract

The matter formed in central heavy-ion collisions at a few GeV per nucleon is commonly understood as resonance matter, a gas of nucleons and excited baryon states with a substantial contribution from mesonic, mostly pionic excitations. Yet, in the initial phase of the reaction the system is compressed to beyond nuclear ground state density and hence substantial modifications of the hadron properties are expected to occur. The spectral distribution of virtual photons measured in Au+Au collisions at 2.4 GeV center of mass energy indicates strong medium effects beyond pure superposition of individual NN collisions. We present multi-differential distributions of low-mass electron pairs. This radiation is remarkably well described assuming emission from a thermalized system. To gain deeper understanding of the microscopic origin of the radiation, we extracted the centrality dependent true (not blue-shifted) temperature, its azimuthal distribution, as well as mass-dependent effective slope parameter. Virtual photon spectra are confronted with available model calculations.

Published
2019
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32. Final State Interactions and Polarization Observables in the Reaction pp → pKΛ

Author

Röder Matthias and Ritman James

Subjects
Physics, QC1-999
Abstract

Due to the lack of high quality hyperon beams, final state interactions in hyperon production reactions are a compelling tool to study hyperon-nucleon interactions. The COSY-TOF experiment has recently been upgraded in order to reconstruct the pK+Λ final state with sufficient precision to determine the spin triplet pΛ scattering length with a polarized proton beam. We find an unexpected behavior of the K+ analyzing power which prevents the extraction method to be used with the available statistics. A theoretical explanation is pending. Furthermore, the polarized beam together with the self analyzing decay of the Λ allows us to determine the Λ depolarization. This is especially sensitive to K+ and π exchange in the production mechanism. Our finding verifies, to a large extent, the result from DISTO [2] that has so far been the only measurement close to the production threshold.

Published
2012
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33. Study of pp → 𝚵+ ΛK- with the PANDA Detector.

Author

Beck, R., Thiel, A., Thoma, U., Wunderlich, Y., Pütz, Jennifer, Gillitzer, Albrecht, Ritman, James, and Stockmanns, Tobias

Subjects
EXCITATION spectrum, BARYONS, SPECTROMETRY, MESONS, LUMINOSITY
Abstract

For a deeper insight into the mechanisms of non-perturbative QCD it is essential to understand the excitation pattern of baryons. Up to now only the nucleon excitation spectrum has been subject to systematic experimental studies, while very little is known on excited states of double or triple strange baryons. In studies of antiproton-proton collisions the P ANDA experiment is well-suited for a comprehensive baryon spectroscopy program in the multi-strange sector. A large fraction of the inelastic p p cross section is associated to final states with a baryon-antibaryon pair together with additional mesons, giving access to excited states both in the baryon and the antibaryon channel. For final states containing a 𝚵 + 𝚵- pair, cross sections up to µb are expected, corresponding to production rates of ~ 106/d at a luminosity L = 1031 cm-2 s-1. This study focuses on excited 𝚵- states decaying into ΛK-. A strategy to reconstruct the reaction p p → 𝚵 + 𝚵* and its charge conjugate channel with the P ANDA detector will be presented. [ABSTRACT FROM AUTHOR]

Published
2020
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35. Design, Implementation, and Verification of a Data Acquisition System for the Prototypes of the Front-End Electronics of the PANDA Micro Vertex Detector

Author

Lai, Alessandra, primary, Brinkman, Kai-Thomas, additional, Calvo, Daniela, additional, Pietro, Valentino Di, additional, Quagli, Tommaso, additional, Riccardi, Alberto, additional, Ritman, James, additional, Rivetti, Angelo, additional, Rolo, Manuel, additional, Schnell, Robert, additional, Stockmanns, Tobias, additional, Wheadon, Richard, additional, Zambanini, Andr'e, additional, and Zaunick, Hans-Georg, additional

Published
2017
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37. Triplet based online track finding in the PANDA-STT

Author

Mertens, Marius, Brinkmann, Kai Th. H., Ritman, James L., and Wintz, Peter

Subjects
Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Physical and Theoretical Chemistry, Physik (inkl. Astronomie), Condensed Matter Physics, Atomic and Molecular Physics, and Optics
Published
2014

38. Charge symmetry breaking in $dd\to {}^{4}\mathrm{He}{\pi }^{0}$ with WASA-at-COSY

Author

Adlarson, P., Augustyniak, W., Ciepal, I., Zink, A., Zlomanczuk, J., Zupranski, P., Zurek, Maria, Clement, H., Coderre, Daniel, Czerwinski, E., Demmich, K., Doroshkevich, E., Engels, Ralf W., Erven, Andreas, Erven, Wilhelm, Eyrich, W., Bardan, W., Fedorets, Pavel, Föhl, K., Fransson, K., Goldenbaum, Frank, Goslawski, P., Goswami, Ankita, Grigoryev, Kirill, Gullström, C.-O., Hanhart, Christoph, Hauenstein, Florian, Bashkanov, M., Heijkenskjöld, L., Hejny, Volker, Höistad, B., Hüsken, N., Jarczyk, L., Johansson, T., Kamys, B., Kemmerling, Günter, Khan, Farha Anjum, Khoukaz, A., Bergmann, F. S., Kirillov, D. A., Kistryn, S., Kleines, Harald, Klos, B., Krzemien, W., Kulessa, Pawel, Kupsc, Andrzej, Kuzmin, A., Lalwani, K., Lersch, Daniel, Berlowski, M., Lorentz, Bernd, Magiera, A., Maier, Rudolf, Marciniewski, P., Marianski, B., Mikirtychyants, Maxim, Morsch, H.-P., Moskal, Pawel, Ohm, Henner, Ozerianska, I., Bhatt, H., Perez del Rio, E., Piskunov, N. M., Podkopal, P., Prasuhn, Dieter, Pricking, A., Pszczel, D., Pysz, K., Pyszniak, A., Redmer, C. F., Ritman, James, Bondar, A., Roy, A., Rudy, Z., Sawant, S., Schadmand, Susan, Sefzick, Thomas, Serdyuk, Valeriy, Shwartz, B., Siudak, R., Skorodko, T., Skurzok, M., Büscher, Markus, Smyrski, J., Sopov, V., Stassen, Rolf, Stepaniak, J., Stephan, E., Sterzenbach, Guenter, Stockhorst, Hans, Stroeher, Hans, Szczurek, A., Täschner, A., Calen, H., Trzcinski, A., Varma, R., Wolke, Magnus, Wronska, A., Wüstner, Peter, Wurm, Patrick, Yamamoto, A., Yurev, Leonid, Zabierowski, J., and Zielinski, M. J.

Subjects
ddc:530, Nuclear Experiment
Abstract

Charge symmetry breaking (CSB) observables are a suitable experimental tool to examine effects induced by quark masses on the nuclear level. Previous high precision data from TRIUMF and IUCF are currently used to develop a consistent description of CSB within the framework of chiral perturbation theory. In this work the experimental studies on the reaction View the MathML sourcedd→He4π0 have been extended towards higher excess energies in order to provide information on the contribution of p -waves in the final state. For this, an exclusive measurement has been carried out at a beam momentum of pd=1.2 GeV/cpd=1.2 GeV/c using the WASA-at-COSY facility. The total cross section amounts to σtot=(118±18stat±13sys±8ext) pbσtot=(118±18stat±13sys±8ext) pb and first data on the differential cross section are consistent with s-wave pion production.

Published
2014
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39. Determination of the $\it{\eta'}$-Proton scattering length in free space

Author

Czerwiński, Eryk, Moskal, Paweł, Silarski, Michał, Bass, S. D., Grzonka, Dieter, Kamys, Bogusław, Khoukaz, Alfons, Klaja, Joanna, Krzemień, Wojciech, Oelert, Walter, Ritman, James, Sefzick, Thomas, Smyrski, Jerzy, Täschner, Alexander, Wolke, Magnus, and Zieliński, Marcin

Subjects
Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment
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 $\it{pp\rightarrow pp\eta'}$ reaction close to threshold. Combining these data with previous results, we extract the scattering length for the $\it{\eta'}$-proton potential in free space to be $Re(a_{p\eta'}) = 0\pm0.43$ fm and $Im(a_{p\eta'})=0.37_{-0.16}^{+0.40}$ fm.

Published
2014

40. Search for a dark photon in the $\pi^0 \to e^+e^-\gamma$ decay

Author

Adlarson, P., Augustyniak, W., Ciepal, I., Trzcinski, A., Varma, R., Wagner, G. J., Weglorz, W., Wirzba, Andreas, Wolke, Magnus, Wronska, A., Wüstner, Peter, Wurm, Patrick, Yamamoto, A., Clement, H., Zabierowski, J., Zielinski, M. J., Zipper, W., Zlomanczuk, J., Zupranski, P., Zurek, M., Coderre, Daniel, Czerwinski, E., Demmich, K., Doroshkevich, E., Engels, Ralf W., Erven, Wilhelm, Eyrich, W., Fedorets, Pavel, Bardan, W., Föhl, K., Fransson, K., Goldenbaum, Frank, Goslawski, P., Goswami, Ankita, Grigoryev, Kirill, Gullström, C. -O., Hauenstein, Florian, Heijkenskjöld, L., Hejny, Volker, Bashkanov, M., Hinterberger, F., Hodana, Malgorzata, Höistad, B., Jany, A., Jany, Benedykt, Jarczyk, L., Johansson, T., Kamys, B., Kemmerling, Günter, Khan, Farha Anjum, Bergmann, F. S., Khoukaz, A., Kistryn, S., Klaja, J., Kleines, Harald, Kirillov, D. A., Klos, B., Krapp, M., Krzemien, W., Kulessa, Pawel, Kupsc, Andrzej, Berlowski, M., Kuzmin, A., Lalwani, K., Lersch, Daniel, Li, L., Lorentz, Bernd, Magiera, A., Maier, Rudolf, Marciniewski, P., Marianski, B., Meißner, Ulf-G., Bhatt, Himani, Mikirtychyants, Maxim, Morsch, H. -P., Moskal, Pawel, Nandi, B. K., Ohm, Henner, Ozerianska, I., Perez del Rio, E., Piskunov, N. M., Plucinski, P., Podkopal, P., Bondar, A., Prasuhn, Dieter, Pricking, A., Pszczel, D., Pysz, K., Pyszniak, A., Redmer, F., Ritman, James, Roy, A., Rudy, Z., Sawant, S., Büscher, Markus, Schadmand, Susan, Schmidt, A., Sefzick, Thomas, Serdyuk, Valeriy, Shah, N., Shwartz, B., Siemaszko, M., Siudak, R., Skorodko, T., Skruzok, M., Calen, Hans, Smyrski, J., Sopov, V., Stassen, Rolf, Stepaniak, J., Stephan, E., Sterzenbach, Guenter, Stockhorst, Hans, Stroeher, Hans, Szczurek, A., and Tolba, T.

Subjects
branching ratio: upper limit [pi0], +positron+electron+photon%22">pi0 --> positron electron photon, 0.55 GeV-kin, radiative decay [pi0], interaction [p p], Juelich COSY PS, High Energy Physics - Experiment, High Energy Physics - Phenomenology, magnetic moment [muon], +2p+pi0%22">p p --> 2p pi0, ddc:530, High Energy Physics::Experiment, WASA, Nuclear Experiment, mixing [photon], search for [U boson], mass spectrum [electron positron], experimental results, +U+boson+photon%22">pi0 --> U boson photon
Abstract

The presently world largest data sample of pi0 --> gamma e+e- decays containing nearly 5E5 events was collected using the WASA detector at COSY. A search for a dark photon U produced in the pi0 --> gamma U --> gamma e+e- decay from the pp-->pp\pi^0 reaction was carried out. An upper limit on the square of the U-gamma mixing strength parameter epsilon^2 of 5e-6 at 90% CL was obtained for the mass range 20 MeV, Comment: 16 pages, 8 figures; improved analysis extending the exclusion region to 20 MeV

Published
2013
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43. Annual report / Institut für Kernphysik / COSY 2006

Author

Ströher, Hans, Stockhorst, Hans, Ritman, James, Meißner, Ulf-G., Maier, Rudolf, Machner, Hartmut, Krewald, Siegfried, Hanhart, Christoph, and Büscher, Markus

Abstract

The past year 2006 has been a very successful one for the institute: first off, a major milestone has been achieved with the in-time installation of the WASA detector at an internal target station of COSY and its subsequent commissioning. WASA-at-COSY is ready to take data and the collaboration is looking forward to its first data production run, approved by the COSY-PAC and scheduled for spring 2007. Furthermore, after very productive scientific programs, the internal experiment COSY-11 and the external beam experiments at BIG KARL have finished their data taking phases, and are now completing the analysis of the existing data. The following highlights top the list of the important scientific results: • Pentaquark studies: the TOF-collaboration has very carefully analysed their dedicated high-statistics data sample, and did not find a signal for the $\circleddash^{+}$(1540). This finding has been supported by the ANKE-collaboration in a different final state. • Bound $\eta$-nucleus states: data with unprecedented precision for the $^{3}He\eta$ system have been obtained both at ANKE and at COSY-11 in the d p-reaction, exploiting the unique possibilities at the internal COSY beam during the ramp-up of the energy. The very rapid rise of the total cross section close to threshold implies a very large $^{3}He\eta$ scattering length and hence the presence of a quasi-bound state extremely close to threshold. • Hyperon-nucleon interactions: chiral effective field theory has successfully been applied to the interactions between nucleons and hyperons. This paves the way to a model-independent approach of strange quark effects in nuclei. • Accelerator studies: the COSY accelerator has been used for spin manipulations of a polarized deuteron beam, and clear indications for a deuteron spin resonance have been obtained. All results mentioned have recently been submitted for publication. More details and further results can be found in the main text. In addition to WASA, the two other major installations continue to be developed further: [...]

Published
2007

45. Pluto: a Monte Carlo simulation tool for hadronic physics

Author

Fröhlich, Ingo, Cazon Boado, Lorenzo, Galatyuk, Tetyana, Hejny, Volker, Holzmann, Romain, Kagarlis, Marios, Kuehn, Wolfgang, Messchendorp, Johannes G., Metag, Volker, Pleier, Marc-André, Przygoda, Witold, Ramstein, Beatrice, Ritman, James, Salabura, Piotr, Stroth, Joachim, Sudol, Malgorzata, Fröhlich, Ingo, Cazon Boado, Lorenzo, Galatyuk, Tetyana, Hejny, Volker, Holzmann, Romain, Kagarlis, Marios, Kuehn, Wolfgang, Messchendorp, Johannes G., Metag, Volker, Pleier, Marc-André, Przygoda, Witold, Ramstein, Beatrice, Ritman, James, Salabura, Piotr, Stroth, Joachim, and Sudol, Malgorzata

Abstract

Pluto is a Monte-Carlo event generator designed for hadronic interactions from Pion production threshold to intermediate energies of a few GeV per nucleon, as well as for studies of heavy ion reactions. The package is entirely based on ROOT, without the need of additional packages, and uses the embedded C++ interpreter of ROOT to control the event production. The generation of events based on a single reaction chain and the storage of the resulting particle objects can be done with a few lines of a ROOT-macro. However, the complete control of the package can be taken over by the steering macro and user-defined models may be added without a recompilation of the framework. Multi-reaction cocktails can be facilitated as well using either mass-dependent or user-defined static branching ratios. The included physics uses resonance production with mass-dependent Breit-Wigner sampling. The calculation of partial and total widths for resonances producing unstable particles is performed recursively in a coupled-channel approach. Here, particular attention is paid to the electromagnetic decays, motivated by the physics program of HADES. The thermal model supports 2-component thermal distributions, longitudinal broadening, radial blast, direct and elliptic flow, and impact-parameter sampled multiplicities. The interface allows angular distribution models (e.g. for the primary meson emission) to be attached by the user as well as descriptions of multi-particle correlations using decay chain templates. The exchange of mass sampling or momentum generation models is also possible. The first feature allows for consistent coupled-channel calculations, needed for a correct description of hadronic interactions. For elementary reactions, angular distribution models for selected channels are already part of the framework, based on parameterizations of existing data. This report gives an overview of the design of the package, the included models and the user interface.

Published
2008

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