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36 results on '"S. I. Manaenkov"'

1. Azimuthal single- and double-spin asymmetries in semi-inclusive deep-inelastic lepton scattering by transversely polarized protons

Author

The HERMES Collaboration, A. Airapetian, N. Akopov, Z. Akopov, E. C. Aschenauer, W. Augustyniak, R. Avakian, A. Bacchetta, S. Belostotski, V. Bryzgalov, G. P. Capitani, E. Cisbani, G. Ciullo, M. Contalbrigo, W. Deconinck, R. De Leo, E. De Sanctis, M. Diefenthaler, P. Di Nezza, M. Düren, G. Elbakian, F. Ellinghaus, A. Fantoni, L. Felawka, G. Gavrilov, V. Gharibyan, D. Hasch, Y. Holler, A. Ivanilov, H. E. Jackson, S. Joosten, R. Kaiser, G. Karyan, E. Kinney, A. Kisselev, V. Kozlov, P. Kravchenko, L. Lagamba, L. Lapikás, I. Lehmann, P. Lenisa, W. Lorenzon, S. I. Manaenkov, B. Marianski, H. Marukyan, Y. Miyachi, A. Movsisyan, V. Muccifora, Y. Naryshkin, A. Nass, G. Nazaryan, W.-D. Nowak, L. L. Pappalardo, P. E. Reimer, A. R. Reolon, C. Riedl, K. Rith, G. Rosner, A. Rostomyan, J. Rubin, D. Ryckbosch, A. Schäfer, G. Schnell, B. Seitz, T.-A. Shibata, V. Shutov, M. Statera, A. Terkulov, M. Tytgat, Y. Van Haarlem, C. Van Hulse, D. Veretennikov, I. Vilardi, S. Yaschenko, D. Zeiler, B. Zihlmann, and P. Zupranski

Subjects
Fixed target experiments, Polarization, QCD, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract A comprehensive set of azimuthal single-spin and double-spin asymmetries in semi-inclusive leptoproduction of pions, charged kaons, protons, and antiprotons from transversely polarized protons is presented. These asymmetries include the previously published HERMES results on Collins and Sivers asymmetries, the analysis of which has been extended to include protons and antiprotons and also to an extraction in a three-dimensional kinematic binning and enlarged phase space. They are complemented by corresponding results for the remaining four single-spin and four double-spin asymmetries allowed in the one-photon-exchange approximation of the semi-inclusive deep-inelastic scattering process for target-polarization orientation perpendicular to the direction of the incoming lepton beam. Among those results, significant non-vanishing cos (ϕ−ϕ S ) modulations provide evidence for a sizable worm-gear (II) distribution, g 1 T q x p T 2 $$ {g}_{1\mathrm{T}}^q\left(x,{\mathrm{p}}_T^2\right) $$ . Most of the other modulations are found to be consistent with zero with the notable exception of large sin (ϕ S ) modulations for charged pions and K +.

Published
2020
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2. Ratios of helicity amplitudes for exclusive $$\rho ^0$$ ρ 0 electroproduction on transversely polarized protons

Author

A. Airapetian, N. Akopov, Z. Akopov, E. C. Aschenauer, W. Augustyniak, S. Belostotski, H. P. Blok, A. Borissov, V. Bryzgalov, G. P. Capitani, G. Ciullo, M. Contalbrigo, W. Deconinck, R. De Leo, E. De Sanctis, M. Düren, G. Elbakian, F. Ellinghaus, L. Felawka, S. Frullani, F. Garibaldi, G. Gavrilov, V. Gharibyan, S. V. Goloskokov, Y. Holler, A. Ivanilov, H. E. Jackson, S. Joosten, R. Kaiser, G. Karyan, A. Kisselev, V. Korotkov, V. Kozlov, P. Kravchenko, P. Kroll, L. Lagamba, L. Lapikás, I. Lehmann, P. Lenisa, W. Lorenzon, S. I. Manaenkov, B. Marianski, H. Marukyan, Y. Miyachi, A. Movsisyan, V. Muccifora, A. Nass, W.-D. Nowak, L. L. Pappalardo, A. Petrosyan, P. E. Reimer, A. R. Reolon, C. Riedl, K. Rith, G. Rosner, A. Rostomyan, D. Ryckbosch, Y. Salomatin, A. Schäfer, G. Schnell, B. Seitz, T.-A. Shibata, V. Shutov, M. Statera, A. Terkulov, R. Truty, A. Trzcinski, M. Tytgat, Y. Van Haarlem, C. Van Hulse, D. Veretennikov, V. Vikhrov, I. Vilardi, S. Yaschenko, B. Zihlmann, and P. Zupranski

Subjects
Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Exclusive $$\rho ^0$$ ρ 0 -meson electroproduction is studied by the HERMES experiment, using the 27.6 GeV longitudinally polarized electron/positron beam of HERA and a transversely polarized hydrogen target, in the kinematic region 1.0 GeV $$^2

Published
2017
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3. Ratios of helicity amplitudes for exclusive ρ0 electroproduction

Author

The HERMES Collaboration, A. Airapetian, N. Akopov, Z. Akopov, E. C. Aschenauer, W. Augustyniak, R. Avakian, A. Avetissian, E. Avetisyan, S. Belostotski, N. Bianchi, H. P. Blok, A. Borissov, J. Bowles, V. Bryzgalov, J. Burns, M. Capiluppi, G. P. Capitani, E. Cisbani, G. Ciullo, M. Contalbrigo, P. F. Dalpiaz, W. Deconinck, R. De Leo, L. De Nardo, E. De Sanctis, M. Diefenthaler, P. Di Nezza, M. Düren, M. Ehrenfried, G. Elbakian, F. Ellinghaus, R. Fabbri, A. Fantoni, L. Felawka, S. Frullani, D. Gabbert, G. Gapienko, V. Gapienko, F. Garibaldi, G. Gavrilov, V. Gharibyan, F. Giordano, S. Gliske, M. Golembiovskaya, C. Hadjidakis, M. Hartig, D. Hasch, G. Hill, A. Hillenbrand, M. Hoek, Y. Holler, I. Hristova, Y. Imazu, A. Ivanilov, H. E. Jackson, H. S. Jo, S. Joosten, R. Kaiser, G. Karyan, T. Keri, E. Kinney, A. Kisselev, N. Kobayashi, V. Korotkov, V. Kozlov, P. Kravchenko, V. G. Krivokhijine, L. Lagamba, R. Lamb, L. Lapikás, I. Lehmann, P. Lenisa, L. A. Linden-Levy, A. López Ruiz, W. Lorenzon, X.-G. Lu, X.-R. Lu, B.-Q. Ma, D. Mahon, N. C. R. Makins, S. I. Manaenkov, L. Manfré, Y. Mao, B. Marianski, A. Martinez de la Ossa, H. Marukyan, C. A. Miller, Y. Miyachi, A. Movsisyan, V. Muccifora, M. Murray, A. Mussgiller, E. Nappi, Y. Naryshkin, A. Nass, M. Negodaev, W.-D. Nowak, L. L. Pappalardo, R. Perez-Benito, N. Pickert, P. E. Reimer, A. R. Reolon, C. Riedl, K. Rith, G. Rosner, A. Rostomyan, J. Rubin, D. Ryckbosch, Y. Salomatin, F. Sanftl, A. Schäfer, G. Schnell, K. P. Schüler, B. Seitz, T.-A. Shibata, V. Shutov, M. Stancari, M. Statera, E. Steffens, J. J. M. Steijger, F. Stinzing, S. Taroian, A. Terkulov, A. Trzcinski, M. Tytgat, A. Vandenbroucke, Y. Van Haarlem, C. Van Hulse, D. Veretennikov, V. Vikhrov, I. Vilardi, S. Wang, S. Yaschenko, S. Yen, W. Yu, B. Zihlmann, and P. Zupranski

Subjects
Systematic Uncertainty, Amplitude Ratio, Total Uncertainty, Helicity Amplitude, ZEUS Collaboration, Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Exclusive ρ 0-meson electroproduction is studied in the HERMES experiment, using a 27.6 GeV longitudinally polarized electron/positron beam and unpolarized hydrogen and deuterium targets in the kinematic region 0.5 GeV2

Published
2011
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4. Role of Gravitation in Elementary Particle Structure

Author

S. I. Manaenkov

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Cauchy stress tensor, Lorentz transformation, Elementary particle, Charge (physics), Electron, 01 natural sciences, Atomic and Molecular Physics, and Optics, Action (physics), Gravitation, General Relativity and Quantum Cosmology, symbols.namesake, Classical mechanics, Gravitational field, 0103 physical sciences, symbols, 010306 general physics
Abstract

It is shown in the tetrad representation that there are Reissner–Nordstrom solutions describing systems with a finite action and total inertial mass equal to the gravitational mass. These systems consist of entirely electromagnetic and gravitational fields. There are not any massive point-charges inside them. The system is called ‘‘the classical electron’’ if its charge is equal to $${-}4.80\times 10^{-10}$$ esu. Its electromagnetic field is localized in a space region of about $$10^{-34}$$ cm. The total stress tensor for the classical electron is shown to be identically zero. This means that there is no need in an additional surface-tension of unknown nature preventing the system disintegration, as it takes place in the Lorentz electron model. The hypothesis that gravitation can play a crucial role in the structure of all elementary particles is discussed.

Published
2020

5. The potential of $\varLambda $ and $\varXi ^-$ studies with PANDA at FAIR

Author

M. Sachs, I. K. Keshk, Xi-Guang Cao, M. Traxler, Yan Liang, G. Mazza, C. Fritzsch, T. Holtmann, S. Godre, A. N. Skachkova, Edward Lisowski, E. Rosenthal, S. Yogesh, Y. K. Sun, H. Pace, D. A. Morozov, H. Deppe, J. Pütz, A. G. Denig, S. Ryzhikov, Hans-Georg Zaunick, Dirk Grunwald, A. Kantsyrev, Paolo Mengucci, Christoph Herold, P. Eugenio, Grzegorz Filo, A. Boukharov, M. Kesselkaul, Concettina Sfienti, A. Kulkarni, M. Lattery, J. Frech, A. Hayrapetyan, W. Zhu, A. A. Piskun, Zbigniew Rudy, V. E. Blinov, S. Spataro, Jens Hartmann, S. Schlimme, D. Branford, C. Schwarz, Michaela Thiel, G. Golovanov, T. Wasem, J. Schwiening, P. Wieczorek, E. Pyata, Ch. Hammann, D. Lehmann, Chinorat Kobdaj, V. Moiseev, P. Balanutsa, B. J. Liu, S. Bodenschatz, F. E. Maas, N. Wongprachanukul, Lorenzo Scalise, M. Hoek, A. K. Saxena, M. Virius, M. Steinke, N. Rathod, A.A. Efremov, A. Samartsev, I. Shein, Alexander Olshevskiy, Herbert Koch, V. Panjushkin, K. Nowakowski, S. Belostotski, S. Bukreeva, Ulrich Wiedner, U. Thöring, A.S. Vodopianov, J. Kellers, L. Robison, Ting Xiao, V. Crede, Egle Tomasi-Gustafsson, R. Karabowicz, P. Srisawad, F. Feldbauer, J. Reher, D. Kazlou, M. Yu. Barabanov, W. Kühn, M. Steinen, P. Wintz, D. Wölbing, A. Dbeyssi, M. Kunze, C. Hargens, A. Pitka, A. Lehmann, I. Augustin, Mathias Fink, P. Terlecki, A. E. Yakutin, Magnus Wolke, I. Kisel, V. Varentsov, U. Thoma, Nicola Bianchi, D. Bettoni, Antoni Szczurek, Dan Pantea, M. Slunecka, D. I. Glazier, H. H. Leithoff, Genady Gavrilov, P. Jiang, T. Simantathammakul, Felice Iazzi, E. Widmann, D. G. Ireland, C. Motzko, K.-T. Brinkmann, M. Schmidt, Johann Marton, J. Tao, W. Eyrich, M. Straube, Krzysztof Swientek, B. Krusche, N. K. Walford, S. Vejdani, G. Perez Andrade, Richard Wheadon, N. Kratochwil, H. Li, L. Jokhovets, S.G. Pivovarov, W. Ikegami Andersson, S. Grieser, A. Gerhardt, H. Qi, W. Lauth, S. Diehl, R. Beck, Krzysztof Korcyl, Angelo Rivetti, K. Makonyi, Yupeng Yan, P. P. Natali, G. Kesik, K. N. Basant, I. Lehmann, A. V. Stavinskiy, W. Esmail, M. Preston, A. Gillitzer, D. Calvo, Ayut Limphirat, A. Demekhin, J. Müllers, M. Pelizäus, Andrew Levin, Gianangelo Bracco, N. Quin, D. Lersch, V. Chernetsky, M. Domagala, N. Minaev, A. Balashoff, U. Müller, N. Hüsken, V. Abramov, Torbjörn Bäck, A. Ali, S. Pflüger, C. Yu, G. Boca, R. Klasen, N. Kristi, J. Zmeskal, T. Nasawad, A. Dolgolenko, A. Belousov, B. Wohlfahrt, H. Xu, R. Dosdall, E. Maslova, Gianni Barucca, M.P. Bussa, B. Seitz, J. S. Díaz, G. Hunter, M. Volf, V.Kh. Dodokhov, Piotr Lebiedowicz, A. Scholl, Grzegorz Korcyl, H. Loehner, Mohammed Al-Turany, Andrzej Kupsc, R. W. Novotny, L. Montalto, A. E. Blinov, J. Kannika, Andrey Uzunian, R. Lalik, P. N. Deepak, P.-E. Tegnér, E. Antokhin, A. Gerasimov, P. De Remigis, X. Zhou, Petr Gallus, P. Orsich, I. Prochazka, Valentino Rigato, S. Maldaner, M. Himmelreich, V. M. Abazov, J. Płażek, Kazem Azizi, James Ritman, S. Wolff, Andrea Bianconi, Nicola Paone, W. Nalti, S. Kegel, I. A. Kuyanov, M. Steinacher, A. Chlopik, V. Lucherini, A. Belias, K. K. Seth, Mario Bragadireanu, C. J. Schmidt, V. Freudenreich, A. Ehret, G. V. Fedotov, J. Li, A. Galoyan, G. Neue, P. Schakel, M. Wojciechowski, B. Kopf, C. Liu, P. Gianotti, X. Ma, R. Kappert, Oleg V. Missevitch, J. Pereira-de-Lira, X. Zhang, D. Melnychuk, Paweł Moskal, I. Köseoglu, Bo Cederwall, K. Götzen, M. Finger, M. Marcisovsky, A. Derevschikov, V. Goryachev, V. Jary, R. Kunne, Y. Zhou, G. Reicherz, C. Schnier, J. G. Messchendorp, M. Michałek, T. Erlen, D. Miehling, G. D. Alexeev, Hasko Stenzel, A. Fechtchenko, L. Schmitt, J. Rieger, M. Zyzak, Michael Papenbrock, F. Schupp, Sean A Dobbs, J. Pochodzalla, S. Chernichenko, S. Shimanski, A. Mustafa, K. Dutta, M. Kümmel, S. Bökelmann, S. Sun, Bruce Yabsley, I. Zimmermann, E.K. Koshurnikov, B. Zwieglinski, O. Malyshev, H. Flemming, O. Korchak, U. Kurilla, F. Nerling, M. Pugach, Claude Amsler, G. Huang, A. Akram, L. Sohl, B. J. Roy, S. Wronka, Andrey V. Izotov, Vaclav Vrba, A. Malige, M. Kuhlmann, E. Prencipe, R. Böhm, R. Schubert, Matthias Richter, M. Krebs, L. Nogach, Frank Goldenbaum, B. Ramstein, X. Y. Shen, Paul Alois Buhler, S. I. Manaenkov, A. Aycock, M. Küßner, A. Khoukaz, E. Luschevskaya, K. Khosonthongkee, C. Wenzel, M. Pfaffinger, J. Lühning, P. Poznański, Fabrizio Daví, S. Koch, O. Corell, M. Kavatsyuk, Bernd Voss, B. Hetz, Daniele Rinaldi, J. Regina, L. Capozza, J. Novy, V. Ferapontov, A. Kozela, D. Y. Kirin, U. Lynen, T. Johansson, S. Orfanitski, M. Tomasek, A. Derichs, Andrea Lavagno, Krisztian Peters, A. Ryazantsev, Daniel Duda, Valery Dormenev, M. Peskova, X. A. Xiong, O. Noll, M. Rossbach, M. Fritsch, N. I. Zhuravlev, Tomasz Fiutowski, S. Zimmermann, Y. Melnik, V. A. Matveev, A. Täschner, P. Salabura, S.A. Kononov, T. Triffterer, J. S. Lange, K. Pysz, K. Kalita, W. Erni, Ajay Kumar Rai, D. P. Watts, Lennart Isaksson, Utpal N. Roy, M. Strickert, M. Böhm, M. Albrecht, Y. Bettner, Boris Batyunya, A. Hamdi, J. Hofmann, Jize Zhao, R. Dzhygadlo, T. Held, V. V. Tokmenin, K. Manasatitpong, Andrei Fedorov, H. Orth, Hans Calén, M. Urban, G. Zhao, F. Lisowski, Witold Przygoda, D. Prasuhn, M. Zambrana, W. Schäfer, S. Bleser, A. K. Hergemöller, M. Pesek, Y. A. Tikhonov, A. Filippi, M. Peter, Volker Metag, M. Moritz, A. Kripko, J. Tarasiuk, S. Schadmand, G. Schepers, S. Poslavskiy, Andreas Martin Heinz, Anne-Laure Martin, L. Brück, Antonin Kveton, V. Mochalov, D. Steinschaden, M. Bölting, N. Er, Ch. Schmidt, Mikhail Korzhik, V. Astakhov, Konstantin Beloborodov, H. Denizli, T. Saito, R. Hagdorn, Pawel Marciniewski, D. Veretennikov, C. Morales Morales, Harphool Kumawat, Karin Schönning, Marek Idzik, M. O. Distler, A. Golubev, E. Ladygina, G. Kozlov, Tobias Stockmanns, C. Hahn, N. Cao, T. Sefzick, Giovanni Lancioni, V. Serdyuk, B. Ketzer, Jerzy Smyrski, D. Bonaventura, P. Wüstner, Yu. Yu. Lobanov, V. Pothodi Chackara, Mariana Nanova, B. Salisbury, E. A. Kravchenko, L. Tomasek, D. Bumrungkoh, Patrick Achenbach, W. Alkakhi, V. Uzhinsky, Y. Goncharenko, Harald Merkel, A. Atac, D. Rodríguez Piñeiro, A. Verkheev, P. Fedorets, S. Nakhoul, F. H. Heinsius, Q. Hu, N. B. Skachkov, S. Pongampai, R. Schmitz, E. A. Strokovsky, Zhiyong Liu, H. Peng, V. Arefiev, K. Föhl, D. Liu, P. Semenov, V. Rodin, Keval Gandhi, P. Kulessa, O. Miklukho, A. Vasiliev, P. Brand, A. A. Zhdanov, R. Kliemt, P. Grasemann, A. Yu. Barnyakov, Z. Li, A. Meschanin, Michael Düren, S. Ahmed, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), PANDA, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), BAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümü, Denizli, Haluk, and 0-Belirlenecek

Subjects
+Antixi+Xi%22">anti-p p --> Antixi Xi, Hadron, hyperon: pair production, correction: efficiency, 01 natural sciences, 13.30.-a, symmetry: CP, High Energy Physics - Experiment, Subatomär fysik, benchmark, Subatomic Physics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Electromagnetic Form-Factors, Nuclear Experiment, Spin-½, Physics, Antihyperon Production, Hyperon, PANDA, strong interaction, Observable, hyperon: production, 13.88.+, +Antilambda+Lambda%22">anti-p p --> Antilambda Lambda, Production (computer science), Low-Energy, Nuclear and High Energy Physics, Particle physics, Cp-Violation, +Lambda+pi%22">Xi- --> Lambda pi, Bar (music), spin: correlation, Strong interaction, Hyperons, nonperturbative, 13.60.R, hyperon: decay, 0103 physical sciences, anti-p p: scattering, ddc:530, anti-p: beam, 010306 general physics, polarization, 010308 nuclear & particles physics, background, High Energy Physics::Phenomenology, antihyperon, [No Keywords], Exchange, 13.75.-n, Decay, hyperon: ground state, Antiproton, High Energy Physics::Experiment
Abstract

The antiproton experiment PANDA at FAIR is designed to bring hadron physics to a new level in terms of scope, precision and accuracy. In this work, its unique capability for studies of hyperons is outlined. We discuss ground-state hyperons as diagnostic tools to study non-perturbative aspects of the strong interaction, and fundamental symmetries. New simulation studies have been carried out for two benchmark hyperon-antihyperon production channels: $\bar{p}p \to \bar{\Lambda}\Lambda$ and $\bar{p}p \to \bar{\Xi}^+\Xi^-$. The results, presented in detail in this paper, show that hyperon-antihyperon pairs from these reactions can be exclusively reconstructed with high efficiency and very low background contamination. In addition, the polarisation and spin correlations have been studied, exploiting the weak, self-analysing decay of hyperons and antihyperons. Two independent approaches to the finite efficiency have been applied and evaluated: one standard multidimensional efficiency correction approach, and one efficiency independent approach. The applicability of the latter was thoroughly evaluated for all channels, beam momenta and observables. The standard method yields good results in all cases, and shows that spin observables can be studied with high precision and accuracy already in the first phase of data taking with PANDA., Comment: 26 pages, 16 figures. Changes: Revised title and abstract and corrections/clarifications in the text according to suggestions by journal referees

Published
2021

6. Study of excited $$arvec{arXi }$$ baryons with the $$overline{ ext{ P }}$$ANDA detector

Author

Egle Tomasi-Gustafsson, R. Karabowicz, A. Kripko, M. Domagala, U. Müller, Pawel Marciniewski, D. Veretennikov, Xuan Zhang, Y. A. Tikhonov, A. Hamdi, J. Hofmann, A. Filippi, A. Golubev, Tobias Stockmanns, V. Abramov, C. Hahn, A. Belias, K. Nowakowski, V. Serdyuk, M. Pelizä, Z. Tavukoglu, B. Ketzer, Jerzy Smyrski, J. Pütz, O. Malyshev, U. Kurilla, Konstantin Beloborodov, V. Chauhan, R. W. Novotny, A. Kantsyrev, P. Balanutsa, B. J. Liu, D. G. Ireland, Petr Gallus, G. D. Alexeev, D. Bonaventura, A. V. Stavinskiy, C. Motzko, K.-T. Brinkmann, H. Denizli, V. Crede, I. Zimmermann, E.K. Koshurnikov, Jize Zhao, R. Dzhygadlo, Kazem Azizi, A. Chlopik, Fabrizio Daví, V. Ferapontov, D. Y. Kirin, P. Wüstner, M. Fritsch, N. I. Zhuravlev, D. Rodríguez Piñeiro, Dan Pantea, A. Täschner, W. Eyrich, T. Held, W. Esmail, T. Triffterer, V. V. Tokmenin, K. Manasatitpong, W. Kühn, A. Khoukaz, A. Ali, Alexander Olshevskiy, S. Koch, J. Rieger, R. Hagdorn, S. Godre, V. Lucherini, T. Erlen, Herbert Koch, Y. K. Sun, Mariana Nanova, A. Verkheev, M. Marcisovsky, P. Fedorets, Yan Liang, Claude Amsler, M. Slunecka, S. Nakhoul, J. Müllers, Krisztian Peters, J. Oppotsch, A. Malige, N. Hüsken, B. Salisbury, G. Huang, S. Sun, F. Nerling, A. A. Piskun, F. H. Heinsius, G. Mazza, S. I. Manaenkov, O. Noll, A. T. Olgun, E. Antokhin, A. Gerasimov, S. Spataro, P. Salabura, D. Bumrungkoh, Q. Hu, Kamal K. Seth, D. P. Watts, S. Shimanski, V. Uzhinsky, M. Krebs, S. Bodenschatz, Karin Schönning, C. Yu, G. Perez-Andrade, G. Boca, Krzysztof Swientek, V. E. Blinov, P. De Remigis, C. J. Schmidt, Paolo Mengucci, Christoph Herold, F. Lisowski, E. A. Strokovsky, N. B. Skachkov, Y. Goncharenko, Harald Merkel, Lennart Isaksson, S. Maldaner, S. Pongampai, F. Khalid, W. Lauth, F. Feldbauer, G. Reicherz, Volker Metag, C. Mannweiler, M. Moritz, L. Montalto, Piotr Lebiedowicz, D. Prasuhn, A. Scholl, Michaela Thiel, R. Schmitz, S. Pflüger, J. Kannika, M. Albrecht, M. Volf, V.Kh. Dodokhov, P. Poznański, Marek Idzik, M. O. Distler, I. Shein, T. Wasem, J. Schwiening, T. Sefzick, Giovanni Lancioni, J. Tarasiuk, E. Ladygina, Hans-Georg Zaunick, A. E. Blinov, N. Wongprachanukul, W. Schäfer, S. Schadmand, G. Schepers, Yu. Yu. Lobanov, I. Augustin, Mathias Fink, D. Lehmann, P. Terlecki, P. Eugenio, Concettina Sfienti, S. Poslavskiy, M. Virius, S. Schlimme, C. Schwarz, Andreas Martin Heinz, Andrey Uzunian, B. Zwieglinski, M. Lattery, A. E. Yakutin, P.-E. Tegnér, H. Peng, J. Pereira-de-Lira, Ting Xiao, A.A. Efremov, James Ritman, L. Brück, Antonin Kveton, V. Mochalov, V. M. Abazov, S. Wolff, E. A. Kravchenko, E. Prencipe, F. E. Maas, R. Beck, Krzysztof Korcyl, Lorenzo Scalise, Gianangelo Bracco, L. Tomasek, Patrick Achenbach, A. Derevschikov, E. Vishnevsky, D. Melnychuk, M. Firlej, P. Srisawad, A. Dbeyssi, J. Petersen, I. Köseoglu, D. Miehling, M. Bölting, J. Regina, P. Wintz, J. Reher, W. Alkakhi, H. H. Leithoff, S. Bleser, S. Kegel, N. Er, S. Pankonin, Antoni Szczurek, D. Kazlou, M. Yu. Barabanov, Dirk Grunwald, L. Capozza, L. Linzen, D. Liu, V. Freudenreich, A. Ehret, C. Liu, Yupeng Yan, P. Gianotti, R. Dosdall, Ch. Schmidt, M. Steinen, Y. Zhou, A. Demekhin, A. Galoyan, M. Preston, Zhengtai Liu, T. Holtmann, Paweł Moskal, Mikhail Korzhik, A. Boukharov, D. Klostermann, S. Orfanitski, E. Pyata, P. P. Natali, G. Golovanov, M. Pesek, Ch. Hammann, C. Schnier, J. G. Messchendorp, P. Semenov, V. Rodin, Valentino Rigato, B. Kopf, Keval Gandhi, Daniel Duda, Andrea Bianconi, D. I. Glazier, A. Gillitzer, A. Akram, H. Flemming, M. Kümmel, M. Steinke, I. A. Kuyanov, N. Rathod, D. Calvo, D. Wölbing, R. Böhm, Ali Yilmaz, F. Schupp, Sean A Dobbs, J. Pochodzalla, U. Lynen, S. Chernichenko, B. Krusche, Felice Iazzi, Richard Wheadon, X. Y. Shen, L. Jokhovets, S.G. Pivovarov, R. Kappert, A. Lehmann, Ayut Limphirat, P. Kulessa, I. Lehmann, Andrea Lavagno, N. Kristi, T. Nasawad, A. Dolgolenko, M. Peskova, J. Płażek, Tomasz Fiutowski, L. Nogach, G. V. Fedotov, E. Luschevskaya, E. Maslova, R. Lalik, K. Khosonthongkee, C. Wenzel, M. Pfaffinger, Grzegorz Korcyl, O. Miklukho, A. N. Skachkova, Edward Lisowski, V. Jary, M. Kavatsyuk, M. Himmelreich, H. Deppe, A. G. Denig, A. Vasiliev, A. Derichs, J. Frech, A. Hayrapetyan, W. Zhu, Chinorat Kobdaj, P. Brand, E. Rosenthal, S. Belostotski, Ulrich Wiedner, A.S. Vodopianov, J. Kellers, U. Keskin, U. Thoma, R. Kliemt, A. Yu. Barnyakov, Bo Cederwall, K. Götzen, A. Meschanin, Michael Düren, Johann Marton, V. Chernetsky, Gianni Barucca, H. Loehner, Vaclav Vrba, M. Sachs, I. K. Keshk, Xi-Guang Cao, M. Traxler, S. Diehl, Andrew Levin, M.P. Bussa, S. Yerlikaya, Nicola Paone, A. Samartsev, P. Jiang, A. Fechtchenko, L. Schmitt, Michael Papenbrock, Bernd Voss, B. Hetz, Daniele Rinaldi, V. Moiseev, Magnus Wolke, V. Varentsov, M. Schmidt, N. Minaev, A. Balashoff, Mohammed Al-Turany, Andrzej Kupsc, P. Orsich, M. Steinacher, M. Finger, V. Panjushkin, H. Xu, M. Michałek, S. Bökelmann, S. Wronka, Andrey V. Izotov, M. Bukharova, G. Neue, R. Schubert, M. Tomasek, D. A. Morozov, S. Zimmermann, J. Grochowski, P. Wieczorek, S. Ryzhikov, M. Hoek, A. Gerhardt, H. Qi, Jens Hartmann, B. Seitz, S. Bukreeva, X. Zhou, G. Kesik, I. Prochazka, Mario Bragadireanu, K. Pysz, S. Coen, O. Korchak, K. Kalita, M. Küßner, O. Corell, T. Johansson, A. Ryazantsev, Y. Melnik, V. A. Matveev, S.A. Kononov, H. Orth, Hans Calén, M. Urban, G. Zhao, Witold Przygoda, T. Simantathammakul, J. Moron, J. Li, Oleg V. Missevitch, Frank Goldenbaum, Ajay Kumar Rai, M. Strickert, M. Böhm, Grzegorz Filo, M. Kunze, W. Ikegami Andersson, R. Klasen, S. Vestrick, Paul Alois Buhler, J. Lühning, J. Novy, Valery Dormenev, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
Nuclear and High Energy Physics, hyperon: particle source, Hadron, Type (model theory), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, decay modes, Combinatorics, Tree (descriptive set theory), excited state: spectrum, 0103 physical sciences, ddc:530, structure, 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, baryon: excited state, Spectrum (functional analysis), Hyperon, anti-p, Baryon, statistics, efficiency, Excited state, Production (computer science), acceptance
Abstract

The European physical journal / A 57(4), 149 (2021). doi:10.1140/epja/s10050-021-00444-5, Published by Springer, Heidelberg

Published
2021

7. PANDA Phase One: PANDA collaboration

Author

R. Klasen, S. Vestrick, Grzegorz Filo, S. Diehl, M. Kunze, W. Ikegami Andersson, A. V. Stavinskiy, Yupeng Yan, Felice Iazzi, D. Rodríguez Piñeiro, J. Müllers, Andrew Levin, Paul Alois Buhler, J. Lühning, J. Novy, Valery Dormenev, James Ritman, Piotr Lebiedowicz, L. Montalto, M. Küßner, A. Scholl, Frank Goldenbaum, Ali Yilmaz, Yan Liang, W. Esmail, M.P. Bussa, A. Ali, L. Jokhovets, S.G. Pivovarov, D. Bonaventura, A. Verkheev, S. Rimjaem, M. Preston, A. T. Olgun, Konstantin Beloborodov, P. Fedorets, A. Hamdi, M. Volf, S. Yerlikaya, S. Nakhoul, J. Kannika, O. Corell, A. Vasiliev, G. Mazza, E. Antokhin, A. Gerasimov, Egle Tomasi-Gustafsson, J. Hofmann, R. Karabowicz, V.Kh. Dodokhov, A. E. Blinov, P.-E. Tegnér, Andrey Uzunian, S. Wolff, M. Steinen, L. Linzen, Y. Zhou, F. H. Heinsius, Zhengtai Liu, P. De Remigis, C. J. Schmidt, I. Lehmann, H. Denizli, H. Deppe, Ajay Kumar Rai, T. Johansson, T. Holtmann, A. G. Denig, V. Panjushkin, J. Frech, A. Hayrapetyan, W. Zhu, L. Nogach, E. Vishnevsky, D. Melnychuk, Q. Hu, I. Köseoglu, Andrea Bianconi, J. Pereira-de-Lira, A. Derevschikov, A. Belias, O. Malyshev, D. Miehling, Nicola Paone, K. Pysz, A. Ryazantsev, D. I. Glazier, G. Reicherz, R. Hagdorn, M. Strickert, M. Böhm, Chinorat Kobdaj, P. Brand, Vladimir Blinov, P. Wüstner, X. Y. Shen, Paolo Mengucci, Christoph Herold, M. Pelizäus, G. V. Fedotov, T. Nasawad, A. Dolgolenko, N. B. Skachkov, S. Pongampai, S. Coen, Y. Melnik, V. A. Matveev, U. Kurilla, V. Jary, B. Zwieglinski, F. Khalid, A. Gillitzer, D. Calvo, Andreas Martin Heinz, M. Kavatsyuk, Mariana Nanova, S. Belostotski, K. Nowakowski, Claude Amsler, T. Erlen, K. Kalita, M. Domagala, A. Derichs, Ulrich Wiedner, E. Prencipe, L. Brück, R. Schmitz, Antonin Kveton, V. Mochalov, A.S. Vodopianov, J. Kellers, J. Rieger, G. Huang, N. Wongprachanukul, Bo Cederwall, K. Götzen, A. N. Skachkova, Edward Lisowski, J. Pütz, U. Müller, C. Motzko, K.-T. Brinkmann, S.A. Kononov, Dirk Grunwald, G. Neue, U. Thoma, R. Lalik, A. Kantsyrev, S. Sun, M. Virius, B. Salisbury, J. Oppotsch, Jize Zhao, R. Dzhygadlo, T. Held, F. Nerling, G. D. Alexeev, M. Bölting, A. Boukharov, G. Golovanov, I. Zimmermann, N. Er, A. Malige, S. Godre, Ting Xiao, M. Wojciechowski, Ch. Schmidt, T. Simantathammakul, B. Seitz, P. Balanutsa, B. J. Liu, V. Crede, M. Krebs, E. Rosenthal, Y. K. Sun, D. G. Ireland, W. Kühn, V. Abramov, Z. Tavukoglu, Mikhail Korzhik, A. Kripko, S. Spataro, D. Bumrungkoh, V. M. Abazov, R. Schubert, H. Flemming, Vaclav Vrba, S. I. Manaenkov, S. Kegel, A. Lehmann, U. Keskin, Hans-Georg Zaunick, R. Kliemt, V. Uzhinsky, Karin Schönning, X. Zhou, R. Böhm, S. Maldaner, J. Moron, D. P. Watts, E.K. Koshurnikov, M. Slunecka, P. Poznański, M. Firlej, P. Srisawad, A. Yu. Barnyakov, D. Kazlou, M. Yu. Barabanov, J. Płażek, V. Chauhan, R. W. Novotny, S. Schlimme, C. Schwarz, Y. Goncharenko, Lennart Isaksson, P. Eugenio, Kamal K. Seth, Concettina Sfienti, Harald Merkel, H. Xu, A. Meschanin, Marek Idzik, Mario Bragadireanu, Kazem Azizi, M. Lattery, C. Yu, G. Perez-Andrade, G. Boca, C. Liu, A. Chlopik, Johann Marton, Jens Hartmann, A. Samartsev, M. O. Distler, Dan Pantea, W. Eyrich, P. Gianotti, J. Li, E. Ladygina, Michael Düren, M. Albrecht, M. Tomasek, J. Regina, Michaela Thiel, I. Shein, L. Capozza, V. Chernetsky, Y. A. Tikhonov, Oleg V. Missevitch, V. Lucherini, Lorenzo Scalise, Fabrizio Daví, J. Petersen, F. E. Maas, A. Filippi, Gianni Barucca, T. Wasem, J. Reher, J. Schwiening, P. Wintz, O. Korchak, M. Marcisovsky, Volker Metag, S. Zimmermann, N. Hüsken, S. Pankonin, P. Jiang, Antoni Szczurek, C. Schnier, H. Orth, S. Bukreeva, H. Loehner, S. Orfanitski, D. Lehmann, C. Mannweiler, V. Ferapontov, D. Y. Kirin, M. Moritz, C. Hahn, D. A. Morozov, J. Grochowski, A. A. Piskun, Hans Calén, Christoph Hanhart, S. Bodenschatz, J. Tarasiuk, Christian S. Fischer, M. Urban, G. Zhao, T. Sefzick, A. Demekhin, P. Wieczorek, Giovanni Lancioni, Daniel Duda, M. Hoek, A. Akram, S. Ryzhikov, Yu. Yu. Lobanov, E. A. Strokovsky, A. Galoyan, F. Feldbauer, S. Shimanski, A.A. Efremov, Paweł Moskal, H. Peng, G. Kesik, S. Schadmand, B. Kopf, G. Schepers, B. Krusche, J. G. Messchendorp, V. V. Tokmenin, K. Manasatitpong, A. Dbeyssi, M. Fritsch, Witold Przygoda, S. Poslavskiy, Valentino Rigato, A. Khoukaz, M. Kümmel, D. Klostermann, S. Koch, E. A. Kravchenko, M. Sachs, Ayut Limphirat, L. Tomasek, I. K. Keshk, D. Liu, P. P. Natali, A. Gerhardt, H. Qi, I. A. Kuyanov, Patrick Achenbach, Alexander Olshevskiy, W. Alkakhi, N. Kristi, H. H. Leithoff, N. I. Zhuravlev, P. Semenov, V. Rodin, Keval Gandhi, E. Maslova, Xi-Guang Cao, M. Traxler, Herbert Koch, A. Täschner, Grzegorz Korcyl, Krisztian Peters, P. Kulessa, Sinead M. Ryan, F. Schupp, Sean A Dobbs, J. Pochodzalla, M. Himmelreich, S. Chernichenko, O. Noll, T. Triffterer, F. Lisowski, P. Salabura, Krzysztof Swientek, Pawel Marciniewski, D. Veretennikov, W. Lauth, Xuan Zhang, I. Prochazka, D. Prasuhn, Johann Haidenbauer, S. Pflüger, W. Schäfer, A. Golubev, Tobias Stockmanns, S. Bleser, V. Serdyuk, M. Michałek, B. Ketzer, Jerzy Smyrski, S. Bökelmann, V. Freudenreich, A. Ehret, S. Wronka, R. Kappert, Andrey V. Izotov, M. Bukharova, E. Luschevskaya, K. Khosonthongkee, C. Wenzel, M. Pfaffinger, E. Pyata, Ch. Hammann, M. Steinke, A. Fechtchenko, L. Schmitt, Michael Papenbrock, N. Rathod, D. Wölbing, Richard Wheadon, U. Lynen, Andrea Lavagno, M.F.M. Lutz, Bernd Voss, B. Hetz, Daniele Rinaldi, Tomasz Fiutowski, V. Moiseev, Magnus Wolke, V. Varentsov, M. Schmidt, N. Minaev, A. Balashoff, Mohammed Al-Turany, Andrzej Kupsc, P. Orsich, M. Steinacher, M. Finger, I. Augustin, Mathias Fink, P. Terlecki, A. E. Yakutin, R. Beck, Krzysztof Korcyl, Gianangelo Bracco, R. Dosdall, and O. Miklukho

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Physics beyond the Standard Model, Hadron, Detector, Strong interaction, 01 natural sciences, Antiproton, 0103 physical sciences, Facility for Antiproton and Ion Research, 010306 general physics, Nuclear Experiment, Storage ring
Abstract

The Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany, provides unique possibilities for a new generation of hadron-, nuclear- and atomic physics experiments. The future antiProton ANnihilations at DArmstadt (PANDA or $$\overline{\mathrm{P}}$$ P ¯ ANDA) experiment at FAIR will offer a broad physics programme, covering different aspects of the strong interaction. Understanding the latter in the non-perturbative regime remains one of the greatest challenges in contemporary physics. The antiproton–nucleon interaction studied with PANDA provides crucial tests in this area. Furthermore, the high-intensity, low-energy domain of PANDA allows for searches for physics beyond the Standard Model, e.g. through high precision symmetry tests. This paper takes into account a staged approach for the detector setup and for the delivered luminosity from the accelerator. The available detector setup at the time of the delivery of the first antiproton beams in the HESR storage ring is referred to as the Phase One setup. The physics programme that is achievable during Phase One is outlined in this paper.

Published
2021

8. Azimuthal single- and double-spin asymmetries in semi-inclusive deep-inelastic lepton scattering by transversely polarized protons

Author

P. E. Reimer, Vitaly Shutov, Wolfgang Lorenzon, G. Schnell, P. Lenisa, Ralf Kaiser, B. Seitz, V. Muccifora, P. Di Nezza, G. Nazaryan, T. A. Shibata, R.O. Avakian, P. Kravchenko, Dirk Ryckbosch, A. Rostomyan, Alessandro Bacchetta, B. Zihlmann, L. L. Pappalardo, L. Felawka, N. Akopov, G. Gavrilov, C. Riedl, W. Augustyniak, L. Lagamba, S. Yaschenko, G. Karyan, G. P. Capitani, Frank Ellinghaus, G. Ciullo, E. R. Kinney, Wouter Deconinck, H. E. Jackson, E. De Sanctis, B. Marianski, Y. Naryshkin, M. Contalbrigo, A. Airapetian, V. Gharibyan, Z. Akopov, G. Elbakian, P. Zupranski, Adel Terkulov, A. Ivanilov, R. De Leo, E. C. Aschenauer, A. Nass, S. I. Manaenkov, H. Marukyan, G. Rosner, S. Belostotski, A. Fantoni, A. Movsisyan, V. A. Kozlov, S. Joosten, D. Veretennikov, M. Diefenthaler, M. Statera, D. Zeiler, Y. Van Haarlem, A. Kisselev, Y. Holler, J. G. Rubin, Michael Tytgat, I. Lehmann, A. R. Reolon, V. Bryzgalov, E. Cisbani, C. B. Van Hulse, Y. Miyachi, D. Hasch, I. Vilardi, Michael Düren, W.-D. Nowak, L. Lapikás, Andreas Schäfer, and Klaus Rith

Subjects
dimension: 3, Nuclear Theory, HERMES, Parton, SIDIS, 01 natural sciences, PARTON, High Energy Physics - Experiment, Sivers function, High Energy Physics - Experiment (hep-ex), polarized beam [p], High Energy Physics - Phenomenology (hep-ph), semi-inclusive reaction [deep inelastic scattering], Polarization, leptoproduction [pi], Nuclear Experiment (nucl-ex), Collins, Nuclear Experiment, Spin-½, Quantum chromodynamics, Physics, FINAL-STATE INTERACTIONS, deep inelastic scattering: semi-inclusive reaction, PIONS, lepton: beam, ddc:530, QUARK POLARIZATION, scattering [lepton], anti-p, beam [lepton], High Energy Physics - Phenomenology, modulation, DESY HERA Stor, Fixed target experiments, kinematics, 3 [dimension], QCD, FRAGMENTATION, spin: asymmetry, electron p: deep inelastic scattering, Nuclear and High Energy Physics, DRELL-YAN, transverse [polarization], p: polarized beam, Socio-culturale, FOS: Physical sciences, lepton: scattering, SIVERS ASYMMETRIES, Nuclear physics, phase space, PE2_2, Pion, PE2_1, 0103 physical sciences, polarization: transverse, DISTRIBUTIONS, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, 010306 general physics, PE2_3, pi: leptoproduction, 010308 nuclear & particles physics, Scattering, ELECTROPRODUCTION, 530 Physik, Orientation (vector space), Antiproton, deep inelastic scattering [electron p], lcsh:QC770-798, High Energy Physics::Experiment, asymmetry [spin], experimental results, Lepton
Abstract

Journal of high energy physics 2020(12), 010 (2020). doi:10.1007/JHEP12(2020)010, A comprehensive set of azimuthal single-spin and double-spin asymmetries in semi-inclusive leptoproduction of pions, charged kaons, protons, and antiprotons from transversely polarized protons is presented. These asymmetries include the previously published HERMES results on Collins and Sivers asymmetries, the analysis of which has been extended to include protons and antiprotons and also to an extraction in a three-dimensional kinematic binning and enlarged phase space. They are complemented by corresponding results for the remaining four single-spin and four double-spin asymmetries allowed in the one-photon-exchange approximation of the semi-inclusive deep-inelastic scattering process for target-polarization orientation perpendicular to the direction of the incoming lepton beam. Among those results, significant non-vanishing $\cos(\phi−\phi_S)$ modulations provide evidence for a sizable worm-gear (II) distribution, $g_{1T}(x,p_T^2)$. Most of the other modulations are found to be consistent with zero with the notable exception of large $\sin(\phi_S)$ modulations for charged pions and $K^+$., Published by SISSA, [Trieste]

Published
2020
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9. Beam-helicity asymmetries for single-hadron production in semi-inclusive deep-inelastic scattering from unpolarized hydrogen and deuterium targets

Author

G. Nazaryan, L. Lapikás, D. Veretennikov, Y. Holler, S. Yaschenko, Frank Ellinghaus, N. Akopov, E. R. Kinney, G. Schnell, G. Karyan, V. Bryzgalov, Ralf Kaiser, Wouter Deconinck, E. De Sanctis, V. Gharibyan, I. Vilardi, G. Gavrilov, H. E. Jackson, Vitaly Shutov, H. P. Blok, G. Elbakian, P. Zupranski, Wolfgang Lorenzon, A. Rostomyan, G. Rosner, S. Belostotski, A. Airapetian, S. I. Manaenkov, A. R. Reolon, B. Zihlmann, L. L. Pappalardo, B. Seitz, G. Ciullo, Michael Düren, H. Marukyan, F. Garibaldi, M. Diefenthaler, Dirk Ryckbosch, C. Riedl, T. A. Shibata, M. Contalbrigo, A. Nass, I. Lehmann, Y. Van Haarlem, A. Ivanilov, E. C. Aschenauer, C. Van Hulse, M. Statera, Michael Tytgat, A. Movsisyan, E. Cisbani, A. Hillenbrand, D. Zeiler, C. Vogel, P. Kravchenko, P. Di Nezza, G. Gapienko, V. Zagrebelnyy, A. Fantoni, Adel Terkulov, P. Lenisa, A. Trzcinski, V. Muccifora, W. Augustyniak, V. A. Kozlov, L. Felawka, L. Lagamba, G. P. Capitani, Z. Akopov, Klaus Rith, V. Korotkov, S. Joosten, A. Kisselev, B. Marianski, W.-D. Nowak, and Student Lab and Education

Subjects
HERMES experiment, odd fragmentation functions, Nuclear and High Energy Physics, parton distributions, Hadron, Nuclear Theory, Transverse-momentum dependence, Beam-helicity asymmetries, Nucleonstructure, Twist-3, Socio-culturale, FOS: Physical sciences, Electron, 01 natural sciences, 7. Clean energy, Nucleonstructure, High Energy Physics - Experiment, transverse-spin asymmetries, Nuclear physics, High Energy Physics - Experiment (hep-ex), PE2_2, Pion, PE2_1, factorization, 0103 physical sciences, twist-3, ddc:530, SDG 7 - Affordable and Clean Energy, drell-yan, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, PE2_3, Physics, deep-inelastic scattering, 010308 nuclear & particles physics, Scattering, polarimeter, Deep inelastic scattering, Helicity, lcsh:QC1-999, Deuterium, Physics and Astronomy, nucleon structure, Physics::Accelerator Physics, High Energy Physics::Experiment, transverse-momentum dependence, lcsh:Physics, beam-helicity asymmetries
Abstract

A measurement of beam-helicity asymmetries for single-hadron production in deep-inelastic scattering is presented. Data from the scattering of 27.6 GeV electrons and positrons off gaseous hydrogen and deuterium targets were collected by the HERMES experiment. The asymmetries are presented separately as a function of the Bjorken scaling variable, the hadron transverse momentum, and the fractional energy for charged pions and kaons as well as for protons and anti-protons. These asymmetries are also presented as a function of the three aforementioned kinematic variables simultaneously. (C) 2019 The Author. Published by Elsevier B.V. We gratefully acknowledge the DESY management for its support, the staff at DESY and the collaborating institutions for their significant effort. This work was supported by the State Committee of Science of the Republic of Armenia, Grant No. 18T-1C180; the FWO-Flanders and IWT, Belgium; the Natural Sciences and Engineering Research Council of Canada; the National Natural Science Foundation of China; the Alexander von Humboldt-Stiftung, the German Bundesministerium fur Bildung und Forschung (BMBF), and the Deutsche Forschungsgemeinschaft (DFG); the Italian Istituto Nazionale di Fisica Nucleare (INFN); the MEXT, JSPS, and G-COE of Japan; the Dutch Foundation for Fundamenteel Onderzoek der Materie (FOM); the Russian Academy of Sciences and the Russian Federal Agency for Science and Innovation; the Ikerbasque, Basque Foundation for Science, the Basque Government, Grant No. IT956-16, and MINECO (Juan de la Cierva), Spain; the U. K. Engineering and Physical Sciences Research Council, the Science and Technology Facilities Council, and the Scottish Universities Physics Alliance; as well as the U.S. Department of Energy (DOE) and the National Science Foundation (NSF).

Published
2019
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10. Model for Classical Electron with Finite Mass and Action

Author

S. I. Manaenkov

Subjects
Physics, Nuclear and High Energy Physics, Physics::General Physics, Radiation, 010308 nuclear & particles physics, Cauchy stress tensor, Lorentz transformation, FOS: Physical sciences, Elementary particle, Electron, 01 natural sciences, Atomic and Molecular Physics, and Optics, Action (physics), Gravitation, symbols.namesake, General Relativity and Quantum Cosmology, Classical mechanics, Physics - General Physics, General Physics (physics.gen-ph), Gravitational field, 0103 physical sciences, symbols, Radiology, Nuclear Medicine and imaging, 010306 general physics, Tetrad
Abstract

It is shown in the tetrad representation that there are Reissner--Nordstr\"om solutions with a finite action and total inertial mass equal to the gravitational mass of the considered system. These solutions describe systems of electromagnetic and gravitational fields without any admixture of massive point-charges. The stress tensor for this solutions is shown to be identically zero. This means that there is no need in additional nonelectromagnetic surface-tension, existing in the Lorentz electron model, preventing the system disintegration. The hypothesis that gravitation can play a crucial role in the structure of elementary particles is discussed., Comment: 35 pages, 0 figures

Published
2019
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11. Feasibility study for the measurement of πN transition distribution amplitudes at P¯ANDA in p¯p→J/ψπ0

Author

Tristan Weber, Michaela Thiel, T. Wasem, J. Schwiening, M. Kube, R. Schmitz, D. Lehmann, A. Trzcinski, A. Amoroso, A.A. Efremov, Alexander Olshevskiy, R. Klasen, Herbert Koch, M. Maggiora, A. Dbeyssi, Dipanwita Dutta, F. E. Maas, A. Chlopik, E. Etzelmüller, P. Wintz, V. Lucherini, P. Schakel, P. De Remigis, Krzysztof Swientek, G.S. Shabratova, H. Deppe, Angelo Rivetti, Riccardo Introzzi, K. Dutta, P. Wieczorek, V. M. Datar, W. Lauth, E. A. Strokovsky, L. Busso, M. Hoek, F. Balestra, G. Maniscalco, D. Khaneft, R. Schnell, S. Vejdani, N. G. Minaev, V. Chernetsky, B. Seitz, U. Thoma, K. K. Seth, Mario Bragadireanu, Amiran Tomaradze, B. Fröhlich, S. Pflüger, Valentino Rigato, Franco Bradamante, I. A. Kuyanov, E. Gutz, V. M. Abazov, D. P. Watts, Lennart Isaksson, M. Albrecht, V. Arefiev, T. Schröder, B. Singh, G. Sonika, A. Fechtchenko, C. Rosenbaum, L. Schmitt, Bernd Voss, B. Hetz, S. Sanchez, Magnus Wolke, S.A. Zaporozhets, A. Filippi, S. Coli, Bhavin Patel, A. Khoukaz, Markus Ball, A. Pitka, Krisztian Peters, B. Ramstein, K. Khosonthongkee, M. Pfaffinger, Torbjörn Bäck, D. Veretennikov, J. Pütz, R.A. Salmin, P. Balanutsa, B. J. Liu, A. Hayrapetyan, Chinorat Kobdaj, R. W. Novotny, P. Genova, W. Kühn, P. F. Dalpiaz, S. Belostotski, Ulrich Wiedner, A.S. Vodopianov, Yu.N. Rogov, Wojciech Krzemien, M. Wojciechowski, T. Erlen, Giuseppe Giraudo, B. Zwieglinski, H. Smit, E. Prencipe, J. Jaworowski, R.A. Kunne, S. Lusso, A.G. Fedunov, P. Musiol, C. Schnier, Yan Liang, H. Ohm, Paolo Montagna, A. Karavdina, G. Mazza, N. K. Walford, G. Boca, Boris Batyunya, M. Zyzak, V. Varentsov, M. Kuhlmann, M. Zühlsdorf, V. V. Tokmenin, G. Sterzenbach, M. Tiemens, Stanisław Kistryn, A. Kumar, Alessandro Bressan, F. Lisowski, Paul Alois Buhler, V. Carassiti, D. Prasuhn, M. Zambrana, R. Dzhygadlo, J. Lühning, M.K. Suleimanov, O. Noll, P. Salabura, M. Patsyuk, Christian Schmidt, Johann Zmeskal, M. Barnyakov, A. A. Piskun, F. Feldbauer, Susanna Costanza, Zbigniew Rudy, V. E. Blinov, F. De Mori, Alexander D. Vasiliev, V. Metag, C. Sfienti, Utpal Roy, E. Perevalova, M. Cardinali, R. Birsa, R. Teshev, Aleksandra Wrońska, Egle Tomasi-Gustafsson, F. Uhlig, K. Pysz, T. Sefzick, M. Steinen, V.B. Chandratre, M. Krebs, Matthias Richter, J. P. Wessels, W. Schäfer, M. Fritsch, M. Korjik, J. Rieke, Andreas Lehrach, M. Kavatsyuk, A. Kulkarni, R. F. Parodi, R. Karabowicz, A. Sanchez-Lorente, T.A. Pocheptsov, Valery Dormenev, A. Magiera, H. Flemming, Vassili Kachanov, K. Kalita, W. Erni, P. Poznański, T. Holtmann, O. Miklukho, J. Pychy, S. Bleser, Yu. Yu. Lobanov, Zhiqing Liu, T. Quagli, D. Branford, O. Corell, Konstantin Beloborodov, Dirk Grunwald, Jize Zhao, R. Böhm, L. Capozza, L. Ferrero, A. K. Hergemöller, T. Held, Mario Greco, A. Wilms, Alessandro Drago, I. Augustin, Mathias Fink, A. E. Yakutin, N. Belikov, D. I. Glazier, Sergey Nazarenko, D. Kang, A. Boukharov, M. Kesselkaul, V. Abramov, A. N. Skachkova, S. Bukreeva, U. Thöring, Hans-Georg Zaunick, A. Ryazantsev, S. Marcello, C. Guaraldo, V. Pothodi Chackara, K. Makonyi, A.I. Zinchenko, S. Ryzhikov, S. Orfanitski, Edward Lisowski, K. A. Martin, Ajit Kumar Mohanty, L. Lavezzi, Kirill M. Semenov-Tian-Shansky, S.A. Kononov, L. Gruber, Grzegorz Filo, M. Domagala, L. Cao, V. Di Pietro, S. Grieser, B. Ketzer, S. Schlimme, Marten Ole Schmidt, Alberto Rotondi, M. Michel, C. Schwarz, S. I. Manaenkov, E. A. Kravchenko, R. Beck, A. Gillitzer, Krzysztof Korcyl, B. Slowinski, G. Kesik, Felice Iazzi, U. Müller, D. Calvo, B. Krusche, C. Wang, M. Steinke, A. Gerhardt, V. L. Malyshev, I. Marishev, E. Widmann, Gianangelo Bracco, Harald Kleines, N. I. Zhuravlev, A. Lehmann, D. Nicmorus Marinescu, Patrick Achenbach, A. Apostolou, D. Walther, Johann Marton, C. Sowa, T. Saito, R. Dosdall, Ayut Limphirat, A. Belias, Dan Pantea, A. Täschner, A. Mustafa, D. Marchand, P. Kulessa, M. Galuska, C. Ugur, W. Ikegami Andersson, M. Savrie, C. Hammann, J. C. van der Weele, D. Wölbing, G.B. Pontecorvo, Vivekanand Jha, Hasko Stenzel, D. Przyborowski, P. Drexler, Antoni Szczurek, Tord Johansson, A. Gerasimov, T. Triffterer, A. Britting, S. Ahmed, Mihai Caprini, W. Eyrich, A. Kozela, V. Grishin, O. Malyshev, U. Kurilla, Yupeng Yan, H. Sohlbach, S. Leiber, P. Strzempek, X. Y. Shen, V. V. Mochalov, M. I. Martínez, U. Lynen, I. Lehmann, M. Bai, A. A. Zhdanov, M. Preston, M. Urban, M. Mikirtychyants, I. K. Keshk, Andrea Lavagno, Grzegorz Korcyl, H. Ahmadi, J. Biernat, A. Lai, M. Traxler, Richard Wheadon, M. Pelizäus, A. Cotta Ramusino, D. Rodríguez Piñeiro, Markus Büscher, R. Kliemt, M. M. Macri, V. Kormilitsin, A. Yu. Barnyakov, Z. Li, Ivan Kisel, Arpit Parmar, Tomasz Fiutowski, C. Schmidt, C. Morales Morales, J. Płażek, Michael Düren, Z. J. Sun, H. Loehner, M. Pugach, P. Fedorets, K. Suzuki, A. P. Onuchin, E. Fioravanti, Andrea Bianconi, B. Ma, Yu.M. Mel'nik, M. Deiseroth, F. H. Heinsius, D. G. Ireland, J. S. Lange, Anne-Laure Martin, B. Wohlfahrt, H. Xu, J. Van de Wiele, P. N. Deepak, D. A. Morozov, N. Hüsken, Livio Bianchi, Günter Kemmerling, S. Löchner, B. Galnander, Jifeng Hu, N. B. Skachkov, G. D. Alexeev, T. Ullrich, I. Zimmermann, B. J. Roy, E.K. Koshurnikov, D. Steinschaden, M. Michałek, Bruce Yabsley, M. N. Wagner, S. Wronka, Smbat Grigoryan, Paola Gianotti, Andrey V. Izotov, T. Kuske, S. C. Li, A. G. Zorin, A. Davidenko, M. Lindemulder, V. Astakhov, Andreas Herten, V.I. Lobanov, V.Kh. Dodokhov, Oleg V. Missevitch, Y. Wang, C. Hahn, A. Pyszniak, M.G. Sapozhnikov, L. V. Malinina, Andrey Uzunian, Andrei Fedorov, H. Orth, A. Ehret, Alastair J. Wilson, L. V. Nogach, R. Nellen, Hans Calén, I. Garzia, A.F. Makarov, Harphool Kumawat, S. I. Serednyakov, A. Galoyan, Paweł Moskal, Karin Schönning, W. Czyzycki, J. G. Messchendorp, A. Riccardi, M. Kümmel, A. Sokolov, Maria Krawczyk, Ting Xiao, S. Godre, A. G. Denig, Marek Idzik, M. O. Distler, Frank Goldenbaum, P. Srisawad, G. Kozlov, K. Biguenko, P.J.J. Lemmens, S. Spataro, M. Yu. Barabanov, S. Maldaner, A. Zambanini, Ajay Kumar Rai, I. Shein, M. Böhm, M. Rossbach, A. Demekhin, Yury Tikhonov, A. A. Derevschikov, C. Fritzsch, M. Babai, J. S. Díaz, V. K. Rodionov, A. E. Blinov, A. Cebulla, S. Reiter, A. Samartsev, Bartosz Mindur, V. N. Goryachev, H. B. Liu, B. Kopf, E. Atomssa, C. Wendel, Sean A Dobbs, J. Pochodzalla, Yu.I. Davydov, Genady Gavrilov, Andrew Levin, M.P. Bussa, G. Rosner, S. Jasper, Ankhi Roy, J. Olave, A. Bersani, Bo Cederwall, K. Götzen, B. Kamys, P. Wüstner, Piotr Lebiedowicz, D. Bettoni, A. Dolgolenko, P.-E. Tegnér, Mariana Nanova, D. Melnychuk, V. Akishina, P. A. Semenov, V. Balanutsa, P. Mahlberg, H. Leithoff, Victor Bobrovnikov, M. Papenbrock, L. Fava, R. Valente, R. Veenstra, C. Motzko, K.-T. Brinkmann, F. Nerling, V. Uzhinsky, Harald Merkel, M. Destefanis, D. Lin, Y.M. Goncharenko, M. C. Mora Espí, N. Divani Veis, Pawel Marciniewski, Mohammed Al-Turany, Q. Hu, Andrzej Kupsc, M. Steinacher, Tobias Stockmanns, J. Ritman, S. Diehl, V. Serdyuk, Jerzy Smyrski, A. Gromliuk, M. Mignone, M. Moritz, S. Sosio, S. Schadmand, G. Schepers, S. Poslavskiy, and Joachim Pettersson

Subjects
Quantum chromodynamics, Physics, Particle physics, Luminosity (scattering theory), Annihilation, Meson, 010308 nuclear & particles physics, 7. Clean energy, 01 natural sciences, Particle identification, Nuclear physics, Factorization, Antiproton, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Bar (unit)
Abstract

The exclusive charmonium production process in (P) over barp annihilation with an associated pi 0 meson (p) over barp -> J/psi pi(0) is studied in the framework of QCD collinear factorization. The feasibility of measuring this reaction through the J/psi -> e(+) e(-) decay channel with the AntiProton ANnihilation at DArmstadt ((P) over bar ANDA) experiment is investigated. Simulations on signal reconstruction efficiency as well as the background rejection from various sources including the (P) over barp -> pi(+)pi(-)pi(0) and (p) over barp -> J/psi pi(0)pi(0) reactions are performed with PANDAROOT, the simulation and analysis software framework of the (P) over bar ANDA experiment. It is shown that the measurement can be done at (P) over bar ANDA with significant constraining power under the assumption of an integrated luminosity attainable in four to five months of data taking at the maximum design luminosity.

Published
2017

12. Erratum to: Spin density matrix elements in exclusive $$\omega $$ electroproduction on $$^1$$H and $$^2$$H targets at 27.5 GeV beam energy

Author

P. E. Reimer, V. A. Kozlov, P. F. Dalpiaz, T. A. Shibata, B. Marianski, V. Bryzgalov, E. De Sanctis, V. Gharibyan, D. Hasch, G. Schnell, Morgan Murray, L. Felawka, F. Garibaldi, C. Riedl, W.-D. Nowak, G. Ciullo, L. Lagamba, G. P. Capitani, S. Joosten, A. Kisselev, C. Van Hulse, Wouter Deconinck, Luciano Pappalardo, Y. Van Haarlem, H. P. Blok, Z. Akopov, Michael Tytgat, E. Cisbani, Wolfgang Lorenzon, E. Etzelmüller, D. Zeiler, Frank Ellinghaus, Ivana Hristova, J. J. M. Steijger, Riccardo Fabbri, S. Yaschenko, Michael Düren, M. Ehrenfried, S. Taroian, B. Zihlmann, Y. J. Mao, P. Zupranski, M. Statera, A. R. Reolon, E. R. Kinney, Y. Naryshkin, V. A. Korotkov, Alexander Borissov, M. Capiluppi, B. Seitz, M. Diefenthaler, A. Movsisyan, H. Marukyan, A. Nass, I. Vilardi, R. Perez-Benito, G. Elbakian, B. Q. Ma, S. I. Manaenkov, Adel Terkulov, P. Di Nezza, R. Truty, M. Contalbrigo, R. De Leo, A. Airapetian, D. Gabbert, P. Kravchenko, Klaus Rith, A. Petrosyan, M. Hartig, S. Frullani, Dirk Ryckbosch, H. E. Jackson, V. G. Krivokhijine, S. Yen, A. Ivanilov, Ralf Kaiser, M. Stahl, L. Lapikás, E. Steffens, G. Gavrilov, David Mahon, Andreas Schäfer, I. Lehmann, V. A. Gapienko, T. Keri, V. Vikhrov, K. P. Schüler, Y. Holler, N. Akopov, G. Karyan, Shan Wang, A. Rostomyan, A. Avetissian, G. Gapienko, P. Lenisa, A. Trzcinski, W. Augustyniak, and M. Stancari

Subjects
Physics, Nuclear physics, Matrix (mathematics), Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, 0103 physical sciences, Atomic physics, Spin density, 010306 general physics, 01 natural sciences, Engineering (miscellaneous), Omega, Beam energy
Published
2016

13. Transverse-target-spin asymmetry in exclusive $$\omega $$-meson electroproduction

Author

G. Ciullo, A. Movsisyan, A. Ivanilov, P. E. Reimer, Y. Holler, P. Lenisa, A. Trzcinski, F. Giordano, M. Contalbrigo, M. Negodaev, I. Lehmann, Klaus Rith, V. Muccifora, P. F. Dalpiaz, E. C. Aschenauer, G. Gapienko, G. Schnell, Frank Ellinghaus, V. A. Korotkov, B. Marianski, E. R. Kinney, Adel Terkulov, V. A. Gapienko, P. Zupranski, M. Statera, Y. Naryshkin, N. Akopov, E. De Sanctis, S. Yen, V. Gharibyan, W. Augustyniak, G. Karyan, G. Elbakian, Ralf Kaiser, S. I. Manaenkov, L. Lapikás, Michael Tytgat, Shan Wang, H. E. Jackson, Wouter Deconinck, V. G. Krivokhijine, S. Taroian, Y. Van Haarlem, S. Joosten, V. Vikhrov, E. Steffens, G. Rosner, R. Truty, A. Kisselev, C. Van Hulse, J. Rubin, M. Hoek, Y. Salomatin, B. Seitz, D. Gabbert, A. Rostomyan, C. Vogel, A. Avetissian, Y. J. Mao, B. Q. Ma, W.-D. Nowak, A. R. Reolon, A. Airapetian, A. Nass, B. Zihlmann, R. De Leo, L. L. Pappalardo, M. Diefenthaler, H. Marukyan, S. Belostotski, T. A. Shibata, V. Bryzgalov, Alexander Borissov, T. Keri, R. Perez-Benito, F. Stinzing, S. Frullani, P. Di Nezza, Dirk Ryckbosch, H. P. Blok, Wolfgang Lorenzon, S. Yaschenko, J. J. M. Steijger, Michael Düren, C. Riedl, Y. Miyachi, D. Hasch, I. Vilardi, A. Petrosyan, Z. Akopov, V. A. Kozlov, Stephen V. Gliske, L. Felawka, L. Lagamba, and G. P. Capitani

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, media_common.quotation_subject, Momentum transfer, DESY, Omega, Asymmetry, Nuclear physics, Pion, Positron, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Engineering (miscellaneous), media_common
Abstract

Hard exclusive electroproduction of omega mesons is studied with the HERMES spectrometer at the DESY laboratory by scattering 27.6 GeV positron and electron beams off a transversely polarized hydrogen target. The amplitudes of five azimuthal modulations of the single-spin asymmetry of the cross section with respect to the transverse proton polarization are measured. They are determined in the entire kinematic region as well as for two bins in photon virtuality and momentum transfer to the nucleon. Also, a separation of asymmetry amplitudes into longitudinal and transverse components is done. These results are compared to a phenomenological model that includes the pion pole contribution. Within this model, the data favor a positive pi omega transition form factor.

Published
2015

14. Transverse momentum broadening of hadrons produced in semi-inclusive deep-inelastic scattering on nuclei

Author

V. A. Korotkov, Wouter Deconinck, T. Keri, G. Elbakian, W.-D. Nowak, M. Hartig, S. Frullani, P. Di Nezza, D. Veretennikov, S. I. Manaenkov, Alessandra Fantoni, V. A. Gapienko, Cynthia Marie Hadjidakis, M. Hoek, Y. Miyachi, L. Manfré, A. Martinez de la Ossa, A. López Ruiz, P. E. Reimer, T. A. Shibata, G. Hill, A. Nass, F. Sanftl, V. Vikhrov, D. Hasch, M. Statera, Y. Van Haarlem, S. Belostotski, M. Capiluppi, V. Bryzgalov, D. Zeiler, C. Vogel, Xianguo Lu, M. Negodaev, W. Augustyniak, Ferdinando Giordano, M. Diefenthaler, H. Marukyan, H. S. Jo, B. Seitz, E. Nappi, Vitaly Shutov, H. P. Blok, A. Hillenbrand, Y. Imazu, J. Burns, David Mahon, Stephen V. Gliske, P. B. van der Nat, Morgan Murray, Wolfgang Lorenzon, Andreas Schäfer, L. Felawka, Frank Ellinghaus, Y. Salomatin, N. Akopov, E. R. Kinney, B. Marianski, E. De Sanctis, Ivana Hristova, L. Lagamba, Y. Naryshkin, J. J. M. Steijger, Michael Düren, M. Stancari, S. Yaschenko, C. Bonomo, E. Cisbani, H. E. Jackson, G. P. Capitani, R. Perez-Benito, B. Q. Ma, F. Garibaldi, P. F. Dalpiaz, R. Lamb, B. Ball, K. Rith, Z. Akopov, R. De Leo, Shan Wang, W. Yu, P. Lenisa, L. De Nardo, A. Trzcinski, Zhenyu Ye, J. Dreschler, I. Vilardi, H. Böttcher, V. Gharibyan, C. Riedl, Andreas Mussgiller, A. Rostomyan, A. R. Reolon, A. Avetissian, G. Ciullo, Arne Vandenbroucke, Riccardo Fabbri, E. Avetisyan, S. Joosten, A. Kisselev, V. Kozlov, A. Jgoun, J. G. Rubin, I. Lehmann, K. P. Schüler, Nicola Bianchi, P. Zupranski, L. A. Linden-Levy, J. Stewart, G. Rosner, A. Airapetian, F. Stinzing, G. Schnell, L. Lapikás, Valeria Muccifora, M. Contalbrigo, Hengqiang Ye, B. Zihlmann, L. L. Pappalardo, Martin Raithel, Alexander Borissov, Hasko Stenzel, Michael Tytgat, E. C. Aschenauer, S. Taroian, C. A. Miller, D. Gabbert, Ralf Kaiser, M. Ehrenfried, E. Steffens, N. C. R. Makins, N. Pickert, Dirk Ryckbosch, A. Movsisyan, Y. Holler, G. Karyan, Y. J. Mao, P. Kravchenko, X. R. Lu, C. B. Van Hulse, and A. Ivanilov

Subjects
HERMES experiment, Nuclear and High Energy Physics, Particle physics, Meson, DEUTERIUM, Hadron, FOS: Physical sciences, Virtual particle, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), TARGETS, 0103 physical sciences, ddc:530, HADRONIZATION, Nuclear Experiment, 010306 general physics, Mass number, Physics, 010308 nuclear & particles physics, HERA, Deep inelastic scattering, Physics and Astronomy, High Energy Physics::Experiment, FRAGMENTATION, Lepton
Abstract

The first direct measurement of the dependence on target nuclear mass of the average squared transverse momentum of pi+, pi-, and K+ mesons from deep-inelastic lepton scattering is obtained as a function of several kinematic variables. The data were accumulated at the HERMES experiment at DESY, in which the HERA 27.6 GeV lepton beam was scattered off several nuclear gas targets. The average squared transverse momentum was clearly observed to increase with atomic mass number. The effect increases as a function of Q**2 and x and remains constant as a function of both the virtual photon energy nu and the fractional hadron energy z, except that it vanishes as z approaches unity., Comment: 6 pages, 2 figures

Published
2010

15. Single-spin azimuthal asymmetry in exclusive electroproduction of π+ mesons on transversely polarized protons

Author

P. Lenisa, A. Trzcinski, S. Belostotski, Xianguo Lu, V. Bryzgalov, Wouter Deconinck, Adel Terkulov, J. J. M. Steijger, W. Augustyniak, I. Vilardi, Y. Holler, V. A. Korotkov, M. Varanda, R. Perez-Benito, M. Contalbrigo, David Mahon, Morgan Murray, J. Stewart, C. Riedl, Andreas Schäfer, Michael Tytgat, T. A. Shibata, B. Zihlmann, L. L. Pappalardo, C. B. Van Hulse, S. Taroian, D. Veretennikov, Hengqiang Ye, V. A. Gapienko, A. Ivanilov, C. Bonomo, E. Cisbani, Alexander Borissov, Hasko Stenzel, A. Airapetian, B. Seitz, E. C. Aschenauer, N. Akopov, F. Giordano, T. Keri, Vitaly Shutov, H. P. Blok, Naomi C R Makins, Y. J. Mao, P. Kravchenko, G. Elbakian, Y. Naryshkin, Wolfgang Lorenzon, M. Capiluppi, Valeria Muccifora, E. Avetisyan, S. I. Manaenkov, Dirk Ryckbosch, J. Burns, G. Ciullo, Ivana Hristova, S. Yaschenko, Frank Ellinghaus, Stephen V. Gliske, E. R. Kinney, V. Vikhrov, A. Hillenbrand, Y. Imazu, L. Felawka, P. B. van der Nat, A. Movsisyan, F. Sanftl, P. Zupranski, S. Yen, K. Rith, W.-D. Nowak, G. P. Capitani, Ralf Kaiser, M. Ehrenfried, M. Statera, J. Dreschler, D. Zeiler, L. Manfré, G. Rosner, R. Lamb, G. Hill, C. Vogel, E. De Sanctis, L. Lagamba, Eugenio Nappi, Z. Akopov, Nagao Kobayashi, F. Garibaldi, C. A. Miller, X. R. Lu, W. Yu, D. Gabbert, M. Diefenthaler, H. Marukyan, P. E. Reimer, Alessandra Fantoni, M. Hoek, H. S. Jo, A. Nass, H. E. Jackson, Shan Wang, Y. Salomatin, A. Rostomyan, A. R. Reolon, B. Q. Ma, A. Avetissian, B. Ball, R. De Leo, H. Böttcher, Andreas Mussgiller, A. López Ruiz, Y. Van Haarlem, B. Martinez de la Ossa, Michael Düren, M. Stancari, M. Hartig, S. Frullani, P. Di Nezza, Cynthia Marie Hadjidakis, Y. Miyachi, D. Hasch, K. P. Schüler, L. De Nardo, Zhenyu Ye, Nicola Bianchi, V. Gharibyan, J. G. Rubin, I. Lehmann, B. Marianski, P. F. Dalpiaz, Arne Vandenbroucke, Riccardo Fabbri, S. Joosten, A. Kisselev, L. A. Linden-Levy, G. Schnell, and L. Lapikás

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, Proton, Meson, 010308 nuclear & particles physics, Scattering, media_common.quotation_subject, Virtual particle, 01 natural sciences, Asymmetry, Nuclear physics, 0103 physical sciences, Photon polarization, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon, media_common
Abstract

Exclusive electroproduction of π+ mesons was studied by scattering 27.6 GeV positrons or electrons off a transversely polarized hydrogen target. The single-spin azimuthal asymmetry with respect to target polarization was measured as a function of the Mandelstam variable t, the Bjorken scaling variable xB, and the virtuality Q2 of the exchanged photon. The extracted Fourier components of the asymmetry were found to be consistent with zero, except one that was found to be large and that involves interference of contributions from longitudinal and transverse virtual photons.

Published
2010

16. Exclusive ρ0 electroproduction on transversely polarized protons

Author

P. Zupranski, C. A. Miller, P. Lenisa, A. Fantoni, T. A. Shibata, B. Zihlmann, L. L. Pappalardo, G. Rosner, D. Gabbert, Hengqiang Ye, A. Trzcinski, A. López Ruiz, Alexander Borissov, Hasko Stenzel, Xianguo Lu, T. Keri, G. Ciullo, W.-D. Nowak, S. Yen, M. Contalbrigo, M. Diefenthaler, E. C. Aschenauer, Ralf Kaiser, V. Muccifora, Naomi C R Makins, H. Marukyan, E. Steffens, Y. Van Haarlem, E. Avetisyan, Michael Tytgat, A. R. Reolon, A. Martinez de la Ossa, E. Cisbani, X. R. Lu, M. Ehrenfried, A. Hillenbrand, Y. Imazu, A. Airapetian, Stephen V. Gliske, F. Sanftl, S. Yaschenko, V. Vikhrov, M. Statera, C. Hadjidakis, L. Lagamba, S. Taroian, N. Akopov, Y. Salomatin, P. Di Nezza, B. Q. Ma, W. Augustyniak, D. Zeiler, M. Varanda, F. Stinzing, V. Bryzgalov, C. Vogel, Y. J. Mao, P. Kravchenko, B. Ball, Morgan Murray, L. Manfré, A. Movsisyan, M. Hartig, R. Lamb, R. De Leo, V. A. Korotkov, F. Giordano, David Mahon, J. Stewart, M. Hoek, C. B. Van Hulse, Adel Terkulov, L. Fellawka, Frank Ellinghaus, Andreas Schäfer, E. R. Kinney, R. Perez-Benito, A. Ivanilov, C. Bonomo, J. Burns, M. Capiluppi, H. Böttcher, H. E. Jackson, Y. Naryshkin, G. Elbakian, W. Yu, S. I. Manaenkov, A. Nass, J. G. Rubin, V. A. Gapienko, N. Bianchi, Andreas Mussgiller, Wouter Deconinck, G. Hill, Y. Holler, B. Seitz, I. Lehmann, K. Rith, E. Nappi, Z. Akopov, Nagao Kobayashi, P. B. van der Nat, J. Dreschler, P. E. Reimer, Shan Wang, D. Veretennikov, L. A. Linden-Levy, G. Schnell, C. Riedl, L. Lapikás, K. P. Schüler, Vitaly Shutov, P.F. Dalpiaz, A. Rostomyan, H. P. Blok, A. Avetissian, G.P. Capitani, H. S. Jo, Wolfgang Lorenzon, G. Gapienko, Ivana Hristova, E. De Sanctis, D. Hasch, S. Frullani, Dirk Ryckbosch, B. Marianski, Arne Vandenbroucke, Riccardo Fabbri, S. Joosten, A. Kisselev, J. J. M. Steijger, Michael Düren, M. Stancari, L. De Nardo, Zhenyu Ye, I. Vilardi, V. Gharibyan, Y. Miyachi, and (Astro)-Particles Physics

Subjects
14.40.Aq, Quark, Nuclear and High Energy Physics, Particle physics, Meson, FOS: Physical sciences, HERMES, Parton, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Matrix (mathematics), 13.88.+e, GENERALIZED PARTON DISTRIBUTIONS, Total angular momentum quantum number, 0103 physical sciences, Proton spin crisis, ddc:530, NUCLEON, Nuclear Experiment, 010306 general physics, VIRTUAL COMPTON-SCATTERING, Physics, 010308 nuclear & particles physics, 13.60.Le, 14.20.Dh, 12.38.Qk, QCD, Helicity, TARGET, Physics and Astronomy, High Energy Physics::Experiment, SDG 6 - Clean Water and Sanitation, Nucleon, VECTOR-MESON PRODUCTION
Abstract

The exclusive electroproduction of rho-0 mesons was studied with the HERMES spectrometer at the DESY laboratory by scattering 27.6 GeV positron and electron beams off a transversely polarized hydrogen target. Spin density matrix elements for this process were determined from the measured production- and decay-angle distributions of the produced rho-0 mesons. These matrix elements embody information on helicity transfer and the validity of s-channel helicity conservation in the case of a transversely polarized target. From the spin density matrix elements, the leading-twist term in the single-spin asymmetry was calculated separately for longitudinally and transversely polarized rho-0 mesons. Neglecting s-channel helicity changing matrix elements, results for the former can be compared to calculations based on generalized parton distributions, which are sensitive to the contribution of the total angular momentum of the quarks to the proton spin., 7 pages, 5 figures

Published
2009

17. PentaquarkΘ+search at HERMES

Author

A. Petrosyan, C. A. Miller, W. Augustyniak, R. Perez-Benito, D. Gabbert, B. Zihlmann, Alexander Borissov, Xianguo Lu, M. Negodaev, H. E. Jackson, V. G. Krivokhijine, T. Keri, V. Vikhrov, Shan Wang, I. Vilardi, S. Yaschenko, Y. Salomatin, G. Schnell, E. De Sanctis, Morgan Murray, G. Elbakian, Y. Holler, P. Zupranski, S. I. Manaenkov, Franco Garibaldi, J. Garay Garcia, A. Trzcinski, J. J. M. Steijger, P. Kravchenko, W.-D. Nowak, L. Lagamba, Z. Akopov, Michael Tytgat, A. Rostomyan, A. R. Reolon, A. Avetissian, Hengqiang Ye, B. Q. Ma, E. Cisbani, S. Taroian, G. Rosner, R. Truty, P. E. Reimer, C. Van Hulse, Y. Imazu, D. Hasch, R. De Leo, Salvatore Frullani, Riccardo Fabbri, K. P. Schüler, A. Martinez de la Ossa, B. Seitz, F. Giordano, P. F. Dalpiaz, M. Stancari, E. Avetisyan, J. Bowles, G. Ciullo, Adel Terkulov, Zhenyu Ye, H. P. Blok, Eugenio Nappi, T. A. Shibata, Dirk Ryckbosch, R.O. Avakian, A. Movsisyan, Alessandra Fantoni, Wolfgang Lorenzon, A. López Ruiz, A. Ivanilov, M. Hartig, P. Di Nezza, Y. Van Haarlem, S. Yen, A. Nass, Ivana Hristova, Stephen V. Gliske, J. G. Rubin, I. Lehmann, Ralf Kaiser, David Mahon, L. Felawka, B. Marianski, Y. Miyachi, G. P. Capitani, G. Gavrilov, S. Joosten, A. Kisselev, V. Kozlov, Luciano Pappalardo, M. Contalbrigo, C. Riedl, E. Etzelmüller, Klaus Rith, E. R. Kinney, S. Belostotski, V. Bryzgalov, J. Burns, H. Marukyan, N. Akopov, D. Veretennikov, L. Lapikás, G. Karyan, Wouter Deconinck, and Y. J. Mao

Subjects
RING, Nuclear and High Energy Physics, Particle physics, Baryon production, 01 natural sciences, Particle identification, NO, DECUPLET, Nuclear physics, 0103 physical sciences, Baryons, Invariant mass, Nuclear Experiment, 010306 general physics, Glueball and nonstandard multi-quark, SKYRME MODEL, BARYONS, Physics, 010308 nuclear & particles physics, Hyperon, Pentaquark, Baryon, Physics and Astronomy, Deuterium, Excited state, High Energy Physics::Experiment, Event (particle physics), Glueball and nonstandard multi-quark, Pentaquark, Baryon production, Baryons
Abstract

The earlier search at HERMES for narrow baryon states excited in quasireal photoproduction, decaying through the channel pK(S)(0) -> p pi(+)pi(-), has been extended with improved decay-particle reconstruction, more advanced particle identification, and increased event samples. The structure observed earlier at an invariant mass of 1528 MeV shifts to 1522 MeV and the statistical significance drops to about 2 sigma for data taken with a deuterium target. The number of events above background is 68(-31)(+98)(stat) +/- 13(sys). No such structure is observed in the hydrogen data set.

Published
2015

18. Experimental access to Transition Distribution Amplitudes with the P̄ANDA experiment at FAIR

Author

M. C. Mora Espí, Pawel Marciniewski, K. Makonyi, Yupeng Yan, S. Wronka, D. Pietreanu, Shaji Kumar, N. Belikov, D. I. Glazier, A. Gillitzer, K. Khanchai, Ajay Kumar Rai, M. Steinen, D. Calvo, Yury Tikhonov, A. A. Derevschikov, T. A. Pocheptsov, R.A. Salmin, P. Balanutsa, B. J. Liu, P. N. Deepak, A. E. Blinov, S. Lange, S. Ryzhikov, G. Kalicy, Arpit Parmar, P. Musiol, G. D. Alexeev, D. P. Watts, Lennart Isaksson, Tobias Stockmanns, E. Gutz, P. F. Dalpiaz, Zhi Liu, D. Marchand, S. Grieser, A. Gerhardt, D. Kangh, L. Fava, A. A. Festchenko, Harphool Kumawat, I. Zimmermann, M. Albrecht, B. Krusche, A. Sanchez Lorente, E. A. Strokovsky, M. A. Pasyuk, J. Ritman, P. C. Vinodkumar, T. Quagli, M.G. Sapozhnikov, Ashok Kumar, Herbert Koch, V. I. Astakhov, V. Serdyuk, K. M. von Würtemberg, D. Münchow, Hans-Georg Zaunick, S. Marcello, M. Ullrich, A. Mustafa, Paola Gianotti, T. Kuske, Michaela Thiel, Kamal K. Seth, S. Schlimme, C. Schwarz, M. Savrie, B. Ketzer, Jerzy Smyrski, E. Etzelmüller, A. G. Fedunov, H. Sohlbach, K. Malgorzata, Victor Bobrovnikov, R.Sh. Teshev, L. Ayut, V.M. Abazov, B. Spruck, B. Kamys, D. Mülhheim, Krzysztof Swientek, S. Schadmand, M. V. Korzihik, Zbigniew Rudy, Matei Eugen Vasile, T. Wasem, J. Schwiening, D. Lehmann, M. Patsyuk, Karin Schönning, W. Czyzycki, M. Zühlsdorf, V. N. Goryachev, A. G. Zorin, A. Davidenko, W. Lauth, B. Fröhlich, A. Amoroso, V. Lucherini, P. Schakel, Grzegorz Korcyl, G.A. Mustafaev, Smbat Grigoryan, Ajit Kumar Mohanty, Grzegorz Filo, R. Veenstra, P. Wüstner, J. Marton, Boris Batyunya, L. Ferrero, A. N. Skachkova, Edward Lisowski, I. Garzia, D. Bremer, T. Eissner, D. Lin, Y.M. Goncharenko, Soumen Paul, A.A. Efremov, Dipanwita Dutta, Alberto Rotondi, M. Michel, B. Slowinski, A. Arefiev, Philip Woods, I. Augustin, Yan Liang, A. Karavdina, M. Greco, P. Rosier, Antoni Szczurek, N. Saito, K. Föhl, T. Schröder, B. Singh, Mariana Nanova, Andreas Herten, Oleg V. Missevitch, S.A. Zaporozhets, K.-T. Brinkmann, Sukanta Dash, A. Filippi, A. Trzcinski, Marek Idzik, M. O. Distler, J. Schumann, C. Sowa, I. Konorov, J. C. van der Weele, Mathias Fink, A. E. Yakutin, B. Kopf, E. Atomssa, A. Pitka, R. Karabowicz, H. H. Leithoff, Angelo Rivetti, S. Pornrad, S. Diehl, M. Maggiora, B. Kröck, R. Duchat, O. Levitskaya, Gianluigi Boca, Krzysztof Korcyl, Gianangelo Bracco, Harald Kleines, F. Nerling, L. Caldeira Balkeståhl, S. Coli, E. Perevalova, T. Gessler, Klaus Peters, A. Magiera, Vassili Kachanov, M. Hawryluk, S. Ong, R. Varma, X. Shen, T. Czyzewski, M. Domagala, S. Godre, M. Zyzak, J. Pettersson, F. Uhlig, F. De Mori, P.J.J. Lemmens, Alexander D. Vasiliev, Mohammed Al-Turany, Q. Hu, Andrzej Kupsc, R. Schmitz, P. Mahlberg, P. De Remigis, C. Schnier, S. Lusso, R. Dosdall, L. Zotti, J. Van de Wiele, A. Britting, S. Fissum, Zhigang Li, Jozef Zlomanczuk, Amiran Tomaradze, S. Spataro, U. Müller, R. Valente, V. Uzhinsky, Giulio Stancari, G. S. Shabratova, I. Keshelashvili, S. Jowzaee, Harald Merkel, C. Guaraldo, S. Li, Christian Schmidt, M. Steinacher, V. Kozlov, Yu.N. Rogov, A. Bianconi, T. Held, V. Datar, Andrei Fedorov, H. Orth, T. Weber, A. Kozela, Piotr Salabura, M. Destefanis, Andrea Lavagno, M. Kuhlmann, B. Ma, J. Pychy, Piotr Lebiedowicz, L. Capozza, Dominik Kwiatkowski, Andrew Levin, A. Wilms, Germán Mazza, Matthias Richter, Wojciech Krzemien, Sean A Dobbs, J. Pochodzalla, I. Shein, H. Ohm, Paolo Montagna, Paul Alois Buhler, Y. Naryshkin, Hans Calén, A. Apostolou, S. Orfanitski, V. Grishin, A. Kashchuk, V. Kormilitsin, Tomasz Fiutowski, M. Mingnore, M. Krebs, A. Dolgolenko, E. Fioravanti, P.-E. Tegnér, A. Chlopik, A. Gromliuk, Andreas Lehrach, I. Georgadze, B. Czech, B. Zwieglinski, Kurt Hansen, W. Schäfer, C. Motzko, R. Kunne, P. Genova, J. Lühning, A. Psyzniak, S. Bianco, H. Smit, Nicola Bianchi, Felice Iazzi, J. Rieke, M. Fritsch, R. Dzhygadlo, O. Corell, E. Pace, S. I. Manaenkov, V. Chandratre, S. Sosio, A. Olshevskiy, T. Johansson, S. Sanchez, Concettina Sfienti, R. F. Parodi, D. Walther, T. Saito, E. Köhler, Zhi Sun, Markus Büscher, P. Kulessa, Magnus Wolke, I. Kisel, V. Tokmenin, Alexander Vodopyanov, J.H. Zhao, C. Wang, M. Kube, M. Kavatsyuk, T. Hennino, Johann Zmeskal, V. Varentsov, C. Morales Morales, S. Esch, R. Kliemt, G. Schepers, S. Poslavskiy, Alessandro Drago, Dan Pantea, M. Imre, W. Eyrich, D. Melnychuk, M.P. Bussa, Dirk Grunwald, I. Lehmann, D. Rodríguez Piñeiro, Kjell Fransson, A. P. Onuchin, Valery Dormenev, M. Rossbach, F. E. Maas, Giuseppe Giraudo, M. Pelizäus, D. P. Mohanta, H. Deppe, C. Rosenbaum, M. Cardinali, A. G. Denig, A. Boukharov, V. Abramov, A. Hayrapetyan, K. Pysz, Vladimir Blinov, A. K. Hergemöller, A. Ryazantsev, K. Kalita, P. Wintz, Raghunath Sahoo, V. Akishina, P. A. Semenov, V. Balanutsa, Mikael Lundin, M. M. Macri, Anne-Laure Martin, A. Karmokov, U. Cahit, A. Demekhin, G. Rosner, W. Erni, S. Plueger, S. Leiber, Michael Werner, L. Schmitt, S. Costanza, Bent Schröder, R. Arora, D. Deermann, M. Leyhe, S.A. Kononov, S. Belostotski, Ulrich Wiedner, Maria Krawczyk, L. V. Malinina, M. Tiemens, Yu.M. Mel'nik, Ch. Schmidt, O. Merle, U. Thoma, M. Babai, A. Semenov, R. Maier, Ankhi Roy, Michael Düren, L. V. Nogach, E. Widmann, A. Zhadanov, Valentino Rigato, Stanisław Kistryn, P. Fedorets, K. Suzuki, D. A. Morozov, Franco Bradamante, Torbjörn Bäck, L. Busso, C. Le Galliard, Bhavin Patel, Alessandro Bressan, K. Chinorat, M. Wojciechowski, A. Lehmann, A.F. Makarov, A. Galoyan, P. Wieczorek, T. Holtmann, Bernd Voss, Aleksandra Wrońska, J. S. Díaz, M. Hoek, D. Veretennikov, F. H. Heinsius, P. Brandys, F. Balestra, H. Flemming, F. Lisowski, H. Younis, Paweł Moskal, G. Maniscalco, P. Jasinski, V. K. Rodionov, J. G. Messchendorp, R. Schnell, O. Miklukho, D. Prasuhn, M. Zambrana, M. Kümmel, L. Cao, I. Marishev, A. Bersani, Bo Cederwall, K. Götzen, L. Lavezzi, S. Vejdani, N. G. Minaev, Herbert Löhner, V. Metag, R. W. Novotny, E. Tomasi-Gustafsson, N. B. Skachkov, A. Cebulla, Bartosz Mindur, V. Chernetsky, B. Seitz, Daniel M. Kaplan, E. K. Koshurnikov, B. Ramstein, A. Kulkarni, B. J. Roy, T. Sefzick, D. Khaneft, D. Branford, A. A. Piskun, Reinhard Beck, S. Bleser, Yu. Yu. Lobanov, R. Siudak, V. I. Lobanov, E. A. Kravchenko, S. Bukreeva, A. Samartsev, U. Thöring, F. Feldbauer, Ting Xiao, Patrick Achenbach, Hongwei Liu, Johannes Peter Wessels, D. Bettoni, Yu.I. Davydov, V. I. Dormenev, Genady Gavrilov, Ch. Wendel, M. Yu. Barabanov, Kirill M. Semenov-Tian-Shansky, R. Birsa, T. Bel, Günter Kemmerling, A. Khoukaz, V. Carassiti, B. Galnander, Jifeng Hu, M. Bragadireanu, I. A. Kuyanov, Bruce Yabsley, Andrey V. Izotov, O. Noll, J. Kunkel, A. Dbeyssi, K. Suvorov, Vivekanand Jha, Wolfgang Kuhn, Hasko Stenzel, O. Malyshev, A. A. Sokolov, U. Kurilla, G. Kuhl, D. Kaiser, P. Strzempek, A. Goerres, J. Biernat, D. G. Ireland, H. Xu, M. K. Suleimanov, G. Sterzenbach, E. Prencipe, A. Ortiz, N. I. Zhuravlev, A. Täschner, A. Gerasimov, T. Triffterer, M. Deiseroth, A. Wilson, Marek Palka, M. Lindemulder, A. Y. Barnyakov, V.Kh. Dodokhov, D. Nicmorus, Andrey Uzunian, A. Ehret, R. Nellen, Ch. Hammann, M. Steinke, V. L. Malyshev, P. Drexler, Richard Wheadon, A. Cotta Ramusino, P. Sarin, Riccardo Introzzi, H. Clement, I. Kulakov, M. Zuehlsdorf, M. Galuska, S. Kliczewski, G.B. Pontecorvo, D. Przyborowski, Mihai Caprini, V. V. Mochalov, M. Jadhav, M. Mikirtychyants, M. Traxler, Frank Goldenbaum, Research unit Nuclear & Hadron Physics, The PANDA Collaboration, Null, Singh, B. P, Erni, W., Keshelashvili, I., Krusche, B., Steinacher, M., Liu, B., Liu, H., Liu, Z., Shen, X., Wang, C., Zhao, J., Albrecht, M., Fink, M., Heinsius, F. H., Held, T., Holtmann, T., Koch, H., Kopf, B., Kümmel, M., Kuhl, G., Kuhlmann, M., Leyhe, M., Mikirtychyants, M., Musiol, P., Mustafa, A., Pelizäus, M., Pychy, J., Richter, M., Schnier, C., Schröder, T., Sowa, C., Steinke, M., Triffterer, T., Wiedner, U., Beck, R., Hammann, C., Kaiser, D., Ketzer, B., Kube, M., Mahlberg, P., Rossbach, M., Schmidt, C., Schmitz, R., Thoma, U., Walther, D., Wendel, C., Wilson, A., Bianconi, A., Bragadireanu, M., Caprini, M., Pantea, D., Pietreanu, D., Vasile, M. E., Patel, B., Kaplan, D., Brandys, P., Czyzewski, T., Czyzycki, W., Domagala, M., Hawryluk, M., Filo, G., Krawczyk, M., Kwiatkowski, D., Lisowski, E., Lisowski, F., Fiutowski, T., Idzik, M., Mindur, B., Przyborowski, D., Swientek, K., Czech, B., Kliczewski, S., Korcyl, K., Kozela, A., Kulessa, P., Lebiedowicz, P., Malgorzata, K., Pysz, K., Schäfer, W., Siudak, R., Szczurek, A., Biernat, J., Jowzaee, S., Kamys, B., Kistryn, S., Korcyl, G., Krzemien, W., Magiera, A., Moskal, P., Palka, M., Psyzniak, A., Rudy, Z., Salabura, P., Smyrski, J., Strzempek, P., Wrońska, A., Augustin, I., Lehmann, I., Nicmorus, D., Schepers, G., Schmitt, L., Al Turany, M., Cahit, U., Capozza, L., Dbeyssi, A., Deppe, H., Dzhygadlo, R., Ehret, A., Flemming, H., Gerhardt, A., Götzen, K., Karabowicz, R., Kliemt, R., Kunkel, J., Kurilla, U., Lehmann, D., Lühning, J., Maas, F., Morales Morales, C., Mora Espí, M. C., Nerling, F., Orth, H., Peters, K., Rodríguez Piñeiro, D., Saito, N., Saito, T., Sánchez Lorente, A., Schmidt, C. J., Schwarz, C., Schwiening, J., Traxler, M., Valente, R., Voss, B., Wieczorek, P., Wilms, A., Zühlsdorf, M., Abazov, V. M., Alexeev, G., Arefiev, A., Astakhov, V. I., Barabanov, M. Y. u., Batyunya, B. V., Davydov, Y. u. I., Dodokhov, V. K. h., Efremov, A. A., Fedunov, A. G., Festchenko, A. A., Galoyan, A. S., Grigoryan, S., Karmokov, A., Koshurnikov, E. K., Lobanov, V. I., Lobanov, Y. u. Y. u., Makarov, A. F., Malinina, L. V., Malyshev, V. L., Mustafaev, G. A., Olshevskiy, A., Pasyuk, M. A., Perevalova, E. A., Piskun, A. A., Pocheptsov, T. A., Pontecorvo, G., Rodionov, V. K., Rogov, Y. u. N., Salmin, R. A., Samartsev, A. G., Sapozhnikov, M. G., Shabratova, G. S., Skachkov, N. B., Skachkova, A. N., Strokovsky, E. A., Suleimanov, M. K., Teshev, R. S. h., Tokmenin, V. V., Uzhinsky, V. V., Vodopyanov, A. S., Zaporozhets, S. A., Zhuravlev, N. I., Zorin, A. G., Branford, D., Glazier, D., Watts, D., Woods, P., Britting, A., Eyrich, W., Lehmann, A., Uhlig, F., Dobbs, S., Seth, K., Tomaradze, A., Xiao, T., Bettoni, D., Carassiti, V., Cotta Ramusino, A., Dalpiaz, P., Drago, A., Fioravanti, E., Garzia, I., Savriè, M., Stancari, G., Akishina, V., Kisel, I., Kulakov, I., Zyzak, M., Arora, R., Bel, T., Gromliuk, A., Kalicy, G., Krebs, M., Patsyuk, M., Zuehlsdorf, M., Bianchi, N., Gianotti, P., Guaraldo, C., Lucherini, V., Pace, E., Bersani, A., Bracco, G., Macri, M., Parodi, R. F., Bianco, S., Bremer, D., Brinkmann, K. T., Diehl, S., Dormenev, V., Drexler, P., Düren, M., Eissner, T., Etzelmüller, E., Föhl, K., Galuska, M., Gessler, T., Gutz, E., Hayrapetyan, A., Hu, J., Kröck, B., Kühn, W., Kuske, T., Lange, S., Liang, Y., Merle, O., Metag, V., Mülhheim, D., Münchow, D., Nanova, M., Novotny, R., Pitka, A., Quagli, T., Rieke, J., Rosenbaum, C., Schnell, R., Spruck, B., Stenzel, H., Thöring, U., Ullrich, M., Wasem, T., Werner, M., Zaunick, H. G., Ireland, D., Rosner, G., Seitz, B., Deepak, P. N., Kulkarni, A. V., Apostolou, A., Babai, M., Kavatsyuk, M., Lemmens, P., Lindemulder, M., Löhner, H., Messchendorp, J., Schakel, P., Smit, H., van der Weele, J. C., Tiemens, M., Veenstra, R., Vejdani, S., Kalita, K., Mohanta, D. P., Kumar, A., Roy, A., Sahoo, R., Sohlbach, H., Büscher, M., Cao, L., Cebulla, A., Deermann, D., Dosdall, R., Esch, S., Georgadze, I., Gillitzer, A., Goerres, A., Goldenbaum, F., Grunwald, D., Herten, A., Hu, Q., Kemmerling, G., Kleines, H., Kozlov, V., Lehrach, A., Leiber, S., Maier, R., Nellen, R., Ohm, H., Orfanitski, S., Prasuhn, D., Prencipe, E., Ritman, J., Schadmand, S., Schumann, J., Sefzick, T., Serdyuk, V., Sterzenbach, G., Stockmanns, T., Wintz, P., Wüstner, P., Xu, H., Li, S., Li, Z., Sun, Z., Rigato, V., Fissum, S., Hansen, K., Isaksson, L., Lundin, M., Schröder, B., Achenbach, P., Bleser, S., Cardinali, M., Corell, O., Deiseroth, M., Denig, A., Distler, M., Feldbauer, F., Fritsch, M., Jasinski, P., Hoek, M., Kangh, D., Karavdina, A., Lauth, W., Leithoff, H., Merkel, H., Michel, M., Motzko, C., Müller, U., Noll, O., Plueger, S., Pochodzalla, J., Sanchez, S., Schlimme, S., Sfienti, C., Steinen, M., Thiel, M., Weber, T., Zambrana, M., Dormenev, V. I., Fedorov, A. A., Korzihik, M. V., Missevitch, O. V., Balanutsa, P., Balanutsa, V., Chernetsky, V., Demekhin, A., Dolgolenko, A., Fedorets, P., Gerasimov, A., Goryachev, V., Varentsov, V., Boukharov, A., Malyshev, O., Marishev, I., Semenov, A., Konorov, I., Paul, S., Grieser, S., Hergemöller, A. K., Khoukaz, A., Köhler, E., Täschner, A., Wessels, J., Dash, S., Jadhav, M., Kumar, S., Sarin, P., Varma, R., Chandratre, V. B., Datar, V., Dutta, D., Jha, V., Kumawat, H., Mohanty, A. K., Roy, B., Yan, Y., Chinorat, K., Khanchai, K., Ayut, L., Pornrad, S., Barnyakov, A. Y., Blinov, A. E., Blinov, V. E., Bobrovnikov, V. S., Kononov, S. A., Kravchenko, E. A., Kuyanov, I. A., Onuchin, A. P., Sokolov, A. A., Tikhonov, Y. A., Atomssa, E., Hennino, T., Imre, M., Kunne, R., Le Galliard, C., Ma, B., Marchand, D., Ong, S., Ramstein, B., Rosier, P., Tomasi Gustafsson, E., Van de Wiele, J., Boca, G., Costanza, S., Genova, P., Lavezzi, L., Montagna, P., Rotondi, A., Abramov, V., Belikov, N., Bukreeva, S., Davidenko, A., Derevschikov, A., Goncharenko, Y., Grishin, V., Kachanov, V., Kormilitsin, V., Melnik, Y., Levin, A., Minaev, N., Mochalov, V., Morozov, D., Nogach, L., Poslavskiy, S., Ryazantsev, A., Ryzhikov, S., Semenov, P., Shein, I., Uzunian, A., Vasiliev, A., Yakutin, A., Yabsley, B., Bäck, T., Cederwall, B., Makónyi, K., Tegnér, P. E., von Würtemberg, K. M., Belostotski, S., Gavrilov, G., Izotov, A., Kashchuk, A., Levitskaya, O., Manaenkov, S., Miklukho, O., Naryshkin, Y., Suvorov, K., Veretennikov, D., Zhadanov, A., Rai, A. K., Godre, S. S., Duchat, R., Amoroso, A., Bussa, M. P., Busso, L., De Mori, F., Destefanis, M., Fava, L., Ferrero, L., Greco, M., Maggiora, M., Maniscalco, G., Marcello, S., Sosio, S., Spataro, S., Zotti, L., Calvo, D., Coli, S., De Remigis, P., Filippi, A., Giraudo, G., Lusso, S., Mazza, G., Mingnore, M., Rivetti, A., Wheadon, R., Balestra, F., Iazzi, F., Introzzi, R., Lavagno, A., Younis, H., Birsa, Renato, Bradamante, Franco, Bressan, Andrea, Martin, Anna, Clement, H., Gålnander, B., Caldeira Balkeståhl, L., Calén, H., Fransson, K., Johansson, T., Kupsc, A., Marciniewski, P., Pettersson, J., Schönning, K., Wolke, M., Zlomanczuk, J., Díaz, J., Ortiz, A., Vinodkumar, P. C., Parmar, A., Chlopik, A., Melnychuk, D., Slowinski, B., Trzcinski, A., Wojciechowski, M., Wronka, S., Zwieglinski, B., Bühler, P., Marton, J., Suzuki, K., Widmann, E., Zmeskal, J., Fröhlich, B., Khaneft, D., Lin, D., Zimmermann, I., and Semenov Tian Shansky, K.

Subjects
Particle physics, (P)Over-Baranda, Nuclear and High Energy Physics, Electroproduction, Hadron, Annihilation, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, Particle identification, Nucleon, NO, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Factorization, 0103 physical sciences, Fysik, Invariant mass, ddc:530, Meson Production, Monte-Carlo, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, Quantum chromodynamics, 010308 nuclear & particles physics, Perturbative QCD, Qcd, Physical Sciences, Exclusive Processes, High Energy Physics::Experiment, Pi(0), Cross-Sections, Energy (signal processing)
Abstract

Baryon-to-meson Transition Distribution Amplitudes (TDAs) encoding valuable new information on hadron structure appear as building blocks in the collinear factorized description for several types of hard exclusive reactions. In this paper, we address the possibility of accessing nucleon-to-pion ($��N$) TDAs from $\bar{p}p \to e^+e^- ��^0$ reaction with the future PANDA detector at the FAIR facility. At high center of mass energy and high invariant mass squared of the lepton pair $q^2$, the amplitude of the signal channel $\bar{p}p \to e^+e^- ��^0$ admits a QCD factorized description in terms of $��N$ TDAs and nucleon Distribution Amplitudes (DAs) in the forward and backward kinematic regimes. Assuming the validity of this factorized description, we perform feasibility studies for measuring $\bar{p}p \to e^+e^- ��^0$ with the PANDA detector. Detailed simulations on signal reconstruction efficiency as well as on rejection of the most severe background channel, i.e. $\bar{p}p \to ��^+��^- ��^0$ were performed for the center of mass energy squared $s = 5$ GeV$^2$ and $s = 10$ GeV$^2$, in the kinematic regions $3.0 < q^2 < 4.3$ GeV$^2$ and $5 < q^2 < 9$ GeV$^2$, respectively, with a neutral pion scattered in the forward or backward cone $| \cos��_{��^0}| > 0.5 $ in the proton-antiproton center of mass frame. Results of the simulation show that the particle identification capabilities of the PANDA detector will allow to achieve a background rejection factor of $5\cdot 10^7$ ($1\cdot 10^7$) at low (high) $q^2$ for $s=5$ GeV$^2$, and of $1\cdot 10^8$ ($6\cdot 10^6$) at low (high) $q^2$ for $s=10$ GeV$^2$, while keeping the signal reconstruction efficiency at around $40\%$. At both energies, a clean lepton signal can be reconstructed with the expected statistics corresponding to $2$ fb$^{-1}$ of integrated luminosity. (.../...), 19 pages, 7 figures (some multiple), 2 tables (each double), preprint of an article for epj - v2

Published
2015

19. Spin density matrix elements in exclusive $$\omega $$ ω electroproduction on $$^1$$ 1 H and $$^2$$ 2 H targets at 27.5 GeV beam energy

Author

P. Lenisa, A. Trzcinski, L. Lapikás, B. Seitz, S. Frullani, W. Augustyniak, M. Stancari, B. Q. Ma, Frank Ellinghaus, Riccardo Fabbri, V. A. Kozlov, Dirk Ryckbosch, E. R. Kinney, G. Schnell, A. Petrosyan, E. De Sanctis, V. Gharibyan, A. Ivanilov, C. Van Hulse, A. Airapetian, Y. Naryshkin, P. Di Nezza, N. Akopov, I. Lehmann, R. De Leo, H. E. Jackson, M. Diefenthaler, Shan Wang, V. G. Krivokhijine, P. F. Dalpiaz, T. A. Shibata, R. Perez-Benito, D. Zeiler, H. Marukyan, E. Etzelmüller, C. Riedl, G. Karyan, B. Marianski, Y. J. Mao, P. Kravchenko, V. A. Korotkov, W.-D. Nowak, V. A. Gapienko, P. E. Reimer, A. Rostomyan, Klaus Rith, A. Avetissian, S. Joosten, G. Ciullo, A. Kisselev, A. Nass, I. Vilardi, Michael Tytgat, E. Cisbani, G. Gapienko, G. Elbakian, K. P. Schüler, S. Taroian, T. Keri, Luciano Pappalardo, S. I. Manaenkov, Morgan Murray, L. Felawka, Wouter Deconinck, L. Lagamba, H. P. Blok, A. Movsisyan, David Mahon, G. P. Capitani, Wolfgang Lorenzon, V. Vikhrov, V. Bryzgalov, Y. Holler, Andreas Schäfer, Ivana Hristova, J. J. M. Steijger, S. Yaschenko, Michael Düren, F. Garibaldi, Z. Akopov, D. Hasch, M. Contalbrigo, M. Hartig, P. Zupranski, Y. Van Haarlem, R. Truty, S. Yen, Ralf Kaiser, E. Steffens, G. Gavrilov, A. R. Reolon, M. Stahl, Adel Terkulov, D. Gabbert, M. Ehrenfried, M. Statera, B. Zihlmann, Alexander Borissov, and M. Capiluppi

Subjects
Physics, Density matrix, HERMES experiment, Particle physics, Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, Hadron, Elementary particle, 01 natural sciences, Helicity, Omega, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Spin-flip, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract

Spin Density Matrix Elements (SDMEs) describing the angular distribution of exclusive ρ 0 electroproduction and decay are determined in the HERMES experiment with 27.6 GeV beam energy and unpolarized hydrogen and deuterium targets. Eight (fifteen) SDMEs that are related (unrelated) to the longitudinal polarization of the beam are extracted in the kinematic region 1

Published
2014

20. Beam-helicity asymmetry in associated electroproduction of real photons ep → eγπN in the Δ-resonance region

Author

Valeria Muccifora, G. Gapienko, Salvatore Frullani, Shan Wang, A. Rostomyan, A. R. Reolon, A. Avetissian, H. P. Blok, B. Marianski, M. Ehrenfried, M. Statera, C. Van Hulse, P. E. Reimer, Wolfgang Lorenzon, Y. Van Haarlem, W. Augustyniak, Zhenyu Ye, Ivana Hristova, I. Vilardi, Adel Terkulov, T. A. Shibata, N. C. R. Makins, V. Gharibyan, R.O. Avakian, H. Böttcher, J. Garay Garcia, P. F. Dalpiaz, S. Joosten, Y. Miyachi, A. Kisselev, V. Kozlov, V. A. Korotkov, David Mahon, Dirk Ryckbosch, S. Yen, M. Diefenthaler, Ralf Kaiser, Andreas Mussgiller, P. Lenisa, V. A. Gapienko, A. Trzcinski, E. Steffens, C. Riedl, H. Marukyan, Luciano Pappalardo, Frank Ellinghaus, J. Burns, E. De Sanctis, G. Gavrilov, Y. Salomatin, T. Keri, Franco Garibaldi, Andreas Schäfer, E. R. Kinney, B. Zihlmann, S. Yaschenko, G. Elbakian, Alexander Borissov, D. Hasch, Riccardo Fabbri, S. I. Manaenkov, Y. Naryshkin, B. Q. Ma, C. A. Miller, W.-D. Nowak, V. Vikhrov, Michael Tytgat, E. Cisbani, Klaus Rith, V. Zagrebelnyy, J. J. M. Steijger, F. Giordano, R. De Leo, Morgan Murray, Michael Düren, J. Bowles, S. Taroian, I. Brodski, H. E. Jackson, V. G. Krivokhijine, Stephen V. Gliske, E. Avetisyan, E. Etzelmüller, R. Perez-Benito, A. Nass, V. Bryzgalov, L. Lagamba, G. P. Capitani, J. G. Rubin, I. Lehmann, B. Seitz, Xianguo Lu, M. Negodaev, M. Hartig, P. Di Nezza, M. Stahl, A. Airapetian, F. Stinzing, G. Schnell, P. Zupranski, A. Ivanilov, G. Rosner, R. Truty, G. Ciullo, A. Movsisyan, Y. Holler, A. Petrosyan, Wouter Deconinck, L. Lapikás, P. Kravchenko, J. Stewart, N. Akopov, M. Contalbrigo, G. Karyan, Y. J. Mao, and E. C. Aschenauer

Subjects
25.30.-c Lepton-induced reactions, Lepton-Nucleon Scattering, QCD, 13.88.+e - Polarization in interactions and scattering, Photon production, Nuclear and High Energy Physics, Photon, media_common.quotation_subject, HERA, LIMIT, 01 natural sciences, Asymmetry, CROSS-SECTIONS, Nuclear physics, Recoil, DEPENDENCE, Polarization, 0103 physical sciences, 010306 general physics, VIRTUAL COMPTON-SCATTERING, media_common, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, Polarization (waves), Helicity, Amplitude, Physics and Astronomy, SPIN, Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics
Abstract

The beam-helicity asymmetry in associated electroproduction of real photons, ep -> aEuro parts per thousand e gamma pi N , in the Delta(1232)-resonance region is measured using the longitudinally polarized Hera positron beam and an unpolarized hydrogen target. Azimuthal Fourier amplitudes of this asymmetry are extracted separately for two channels, ep -> aEuro parts per thousand e gamma pi(0) p and ep -> aEuro parts per thousand e gamma pi(+) n, from a data set collected with a recoil detector. All asymmetry amplitudes are found to be consistent with zero.

Published
2014

21. Reevaluation of the parton distribution of strange quarks in the nucleon

Author

S. Belostotski, V. Bryzgalov, M. Diefenthaler, Paolo Lenisa, S. Joosten, A. Kisselev, V. Kozlov, Luciano Pappalardo, S. Frullani, D. Hasch, Dirk Ryckbosch, P. Zupranski, C. Riedl, Y. Miyachi, W. Augustyniak, B. Marianski, Frank Ellinghaus, T. Keri, M. Ehrenfried, E. R. Kinney, Adel Terkulov, Xianguo Lu, W.-D. Nowak, M. Hoek, G. Gapienko, V. Vikhrov, Morgan Murray, M. Negodaev, G. Rosner, R. Truty, A. Trzcinski, M. Hartig, Y. Naryshkin, I. Vilardi, D. Gabbert, A. Ivanilov, H. P. Blok, E. Avetisyan, P. Di Nezza, Zhenyu Ye, H. E. Jackson, Wolfgang Lorenzon, A. Nass, M. Stahl, V. Gharibyan, V. G. Krivokhijine, B. Zihlmann, Ivana Hristova, S. Yaschenko, Alexander Borissov, B. Seitz, Y. Holler, J. G. Rubin, M. Capiluppi, C. Van Hulse, J. J. M. Steijger, I. Lehmann, Michael Düren, David Mahon, Valeria Muccifora, M. Statera, E. De Sanctis, Franco Garibaldi, Andreas Schäfer, P. E. Reimer, A. Movsisyan, E. Etzelmüller, L. Lapikás, C. Vogel, Shan Wang, Y. Van Haarlem, J. Burns, V. A. Korotkov, A. Rostomyan, A. R. Reolon, A. Avetissian, K. Rith, A. Petrosyan, G. Elbakian, S. I. Manaenkov, A. Airapetian, D. Veretennikov, Y. Salomatin, F. Stinzing, Stephen V. Gliske, L. Felawka, B. Q. Ma, G. P. Capitani, H. Marukyan, L. Lagamba, Z. Akopov, R. De Leo, Andreas Mussgiller, G. Ciullo, V. A. Gapienko, R. Perez-Benito, G. Schnell, J. Garay Garcia, S. Yen, Ralf Kaiser, Wouter Deconinck, E. Steffens, G. Gavrilov, M. Contalbrigo, F. Giordano, E. C. Aschenauer, P. F. Dalpiaz, T. A. Shibata, N. Akopov, G. Karyan, Y. J. Mao, P. Kravchenko, Michael Tytgat, E. Cisbani, and S. Taroian

Subjects
HERMES experiment, Quark, Nuclear and High Energy Physics, Strange quark, Particle physics, Distribution (number theory), strangeness [nucleon], Nuclear Theory, FOS: Physical sciences, Parton, HERMES, 01 natural sciences, sea [strangeness], High Energy Physics - Experiment, x-dependence, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), semi-inclusive reaction [deep inelastic scattering], 0103 physical sciences, ddc:530, 010306 general physics, Nuclear Experiment, HIGH-ENERGY COLLISIONS, Physics, 010308 nuclear & particles physics, Scattering, High Energy Physics - Phenomenology, DESY HERA Stor, Physics and Astronomy, High Energy Physics::Experiment, multiplicity [K], deep inelastic scattering [electron deuteron], Nucleon, distribution function [parton]
Abstract

An earlier extraction from the HERMES experiment of the polarization-averaged parton distribution of strange quarks in the nucleon has been reevaluated using final data on the multiplicities of charged kaons in semi-inclusive deep-inelastic scattering obtained with a kinematically more comprehensive method of correcting for experimental effects. General features of the distribution are confirmed, but the rise at low $x$ is less pronounced than previously reported.

Published
2014

22. Transverse target single-spin asymmetry in inclusive electroproduction of charged pions and kaons

Author

J. Burns, G. Gapienko, J. J. M. Steijger, Michael Düren, Riccardo Fabbri, K. Rith, H. E. Jackson, Michael Tytgat, E. Cisbani, M. Stancari, M. Golembiovskaya, D. Veretennikov, T. Keri, V. G. Krivokhijine, E. Avetisyan, M. Capiluppi, A. Petrosyan, G. Ciullo, S. Taroian, A. Hillenbrand, M. Negodaev, L. De Nardo, Zhenyu Ye, P. E. Reimer, M. Contalbrigo, Shan Wang, S. Yaschenko, I. Vilardi, C. Hadjidakis, Martin Raithel, P. Di Nezza, Frank Ellinghaus, E. C. Aschenauer, W.-D. Nowak, B. Seitz, E. Nappi, J. Bowles, V. Vikhrov, P. Lenisa, E. R. Kinney, B. Marianski, V. A. Korotkov, V. A. Gapienko, C. A. Miller, E. De Sanctis, V. Gharibyan, A. Martinez de la Ossa, Y. Naryshkin, Morgan Murray, N. Bianchi, A. Rostomyan, V. Zagrebelnyy, A. Fantoni, A. Avetissian, D. Gabbert, L. Lapikás, David Mahon, P. F. Dalpiaz, Andreas Schäfer, A. Trzcinski, Stephen V. Gliske, S. Joosten, Wouter Deconinck, M. Ehrenfried, A. Kisselev, L. Felawka, F. Giordano, N. C. R. Makins, G. Elbakian, L. Lagamba, A. R. Reolon, Y. Miyachi, S. Belostotski, V. Bryzgalov, S. I. Manaenkov, Vitaly Shutov, H. P. Blok, S. Frullani, D. Hasch, G. P. Capitani, A. Airapetian, Wolfgang Lorenzon, Dirk Ryckbosch, W. Yu, P. Kravchenko, C. Van Hulse, R. Perez-Benito, Andreas Mussgiller, Ivana Hristova, M. Statera, J. Stewart, W. Augustyniak, D. Zeiler, S. Yen, T. A. Shibata, V. A. Kozlov, R.O. Avakian, F. Stinzing, Ralf Kaiser, G. Schnell, E. Steffens, G. Gavrilov, M. Hartig, P. Zupranski, Z. Akopov, C. Riedl, M. Hoek, N. Akopov, J. G. Rubin, I. Lehmann, G. Rosner, R. Truty, G. Karyan, Y. J. Mao, Adel Terkulov, A. López Ruiz, Y. Van Haarlem, Y. Salomatin, B. Q. Ma, R. De Leo, B. Zihlmann, L. L. Pappalardo, Alexander Borissov, F. Sanftl, M. Diefenthaler, H. Marukyan, A. Movsisyan, A. Ivanilov, Y. Holler, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), HERMES, Student Lab and Education, and (Astro)-Particles Physics

Subjects
HERMES experiment, Hadron, Nuclear Theory, analizing power, Electron, 01 natural sciences, sivers asymmetries, High Energy Physics - Experiment, CROSS-SECTIONS, DEEP-INELASTIC SCATTERING, High Energy Physics - Experiment (hep-ex), hard scattering, arrow-p, Mathematics::Probability, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], chiral-odd contibution, Nuclear Experiment (nucl-ex), cross-sections, Nuclear Experiment, ARROW-P, media_common, Physics, polarized proton-beam, POLARIZED PROTON-BEAM, CHIRAL-ODD CONTRIBUTION, SIVERS ASYMMETRIES, ANALYZING POWER, 200 GEV/C, PI(0) PRODUCTION, HARD SCATTERING, deep-inelastic scattering, ddc:530, PI(0) production, PHYSICS, NUCLEAR, Transverse plane, symbols, Particle physics, Nuclear and High Energy Physics, media_common.quotation_subject, Mathematics::Analysis of PDEs, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Asymmetry, Mathematics::Numerical Analysis, Nuclear physics, symbols.namesake, Pion, 0103 physical sciences, Feynman diagram, SDG 7 - Affordable and Clean Energy, 010306 general physics, 010308 nuclear & particles physics, Deep inelastic scattering, 530 Physik, Physics and Astronomy, High Energy Physics::Experiment
Abstract

Single-spin asymmetries were investigated in inclusive electroproduction of charged pions and kaons from transversely polarized protons at the HERMES experiment. The asymmetries were studied as a function of the azimuthal angle $\psi$ about the beam direction between the target-spin direction and the hadron production plane, the transverse hadron momentum relative to the direction of the incident beam, and the Feynman variable $x_F$. The $\sin(\psi)$ amplitudes are positive for positive pions and kaons, slightly negative for negative pions and consistent with zero for negative kaons, with particular transverse-momentum but weak $x_F$ dependences. Especially large asymmetries are observed for two small subsamples of events, where also the scattered electron was recorded by the spectrometer., Comment: 10 pages, 5 figures

Published
2014

23. Beam-induced nuclear depolarization in a gaseous polarized-hydrogen target

Author

Yasuhiro Sakemi, Valeri Valentinovitch Mitsyn, R. P. Redwine, G. van der Steenhoven, J. van Hunen, L. G. Greeniaus, A. Gute, L. H. Kramer, E. Volk, P. Chumney, S. Frullani, H. Schmitt, F. Stock, Ross Milner, T. A. Shibata, E. De Sanctis, R.O. Avakian, A. Metz, N. Koch, J. Franz, H. Kolster, M.-A. Funk, J.-O. Hansen, A.O. Mateos, A. Borissov, B. D. Fox, E. Devitsin, E. Cisbani, S. Potashov, H. Zohrabian, A. R. Reolon, A. Avetissian, K. McIlhany, I.A. Savin, K. Sinram, R. J. Holt, A. Izotov, T. Wise, F. Masoli, F. Neunreither, J. Blouw, S. Bernreuther, Alan M. Nathan, G.R. Court, F. Schmidt, R. V. Cadman, V. A. Korotkov, N.D. Gagunashvili, Y. Gärber, M. Beckmann, M. McAndrew, G. S. Kyle, H. J. Bulten, Michael Pitt, J. F. J. van den Brand, Th. Henkes, J. Stewart, V. Gharibyan, W. Haeberli, S. Frabetti, A. Brull, Brons, M. Ferstl, M. Sutter, M. Amarian, K. Ackerstaff, Klaus Rith, Robert Henderson, E. R. Kinney, Wolfgang Korsch, A. Reali, E. E. W. Bruins, H. Avakian, A. Airapetian, W. Wander, A. Dvoredsky, A. Nagaitsev, E. C. Aschenauer, H. E. Jackson, V. G. Krivokhijine, K. Königsmann, O. Häusser, G. P. Capitani, Y. Naryshkin, H. Ihssen, Michel Vetterli, M. Kolstein, Haiyan Gao, O. Grebeniouk, Ralf Hertenberger, M. Ruh, A. Schwind, A. Simon, F. K. Martens, M. Nupieri, G. Elbakian, W. Brückner, C. Baumgarten, M. Spengos, P. Di Nezza, S. Brauksiepe, N. Akopov, Michael Tytgat, V. Giordjian, A. Golendukhin, S. I. Manaenkov, M. A. Miller, G. Rakness, M. Henoch, P. Geiger, P. Slavich, V. A. Kozlov, S. Taroian, F. Meissner, P. Rossi, W. Lachnit, D. De Schepper, C. Grosshauser, R. A. Ristinen, Y. Holler, Alessandra Fantoni, N. Meyners, B. R. Owen, H.O. Roloff, P. F. Dalpiaz, G. Graw, D. Hasch, D. H. Potterveld, K. Zapfe-Düren, H. Böttcher, S. F. Pate, Jeffrey Brack, B. W. Filippone, F. Garibaldi, J. Stenger, D. Fick, J. E. Belz, R. D. McKeown, P.K.A. de Witt Huberts, M. Niczyporuk, A. Jgoun, Mauro Iodice, V. Papavassiliou, Belostotski, S. Yoneyama, R. Van de Vyver, G. M. Urciuoli, W.-D. Nowak, H. Ogami, T. Shin, Manuella Vincter, A. Kisselev, H. Tallini, Wolfgang Lorenzon, W. Hoprich, U. Stoesslein, H. Fischer, J. W. Martin, S. Rudnitsky, Dirk Ryckbosch, J. Sowinski, B. Tipton, Hiroaki Kobayashi, K. Fiedler, K. Woller, Thomas O'Neill, P.W. Green, B. Braun, K. P. Schüler, Nicola Bianchi, O. Mikloukho, V. Shutov, B. Bains, C. Simani, Naomi C R Makins, R. Mozzetti, Ralf Kaiser, E. Steffens, G. Gavrilov, A. Fechtchenko, B. Bray, P. Kitching, Th. Benisch, M. Düren, P. Carter, C. A. Miller, Adel Terkulov, Valeria Muccifora, G. Schnell, S. E. Williamson, and (Astro)-Particles Physics

Subjects
HERMES experiment, Physics, Hydrogen, General Physics and Astronomy, chemistry.chemical_element, FOS: Physical sciences, DESY, Depolarization, HERA, Magnetic field, High Energy Physics - Experiment, NO, High Energy Physics - Experiment (hep-ex), Bunches, chemistry, Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Beam (structure)
Abstract

Spin-polarised atomic hydrogen is used as a gaseous polarised proton target in high energy and nuclear physics experiments operating with internal beams in storage rings. When such beams are intense and bunched, this type of target can be depolarised by a resonant interaction with the transient magnetic field generated by the beam bunches. This effect has been studied with the HERA positron beam in the HERMES experiment at DESY. Resonances have been observed and a simple analytic model has been used to explain their shape and position. Operating conditions for the experiment have been found where there is no significant target depolarisation due to this effect., REVTEX, 6 pages, 5 figures

Published
1999

24. Azimuthal distributions of charged hadrons, pions, and kaons produced in deep-inelastic scattering off unpolarized protons and deuterons

Author

A. Trzcinski, J. Burns, N. C. R. Makins, S. Frullani, A. Hillenbrand, Y. Imazu, K. Rith, Dirk Ryckbosch, Adel Terkulov, V. A. Gapienko, A. Ivanilov, Y. Holler, S. Yen, G. Gapienko, J. Bowles, J. G. Rubin, David Mahon, M. Golembiovskaya, Ralf Kaiser, F. Sanftl, I. Lehmann, Michael Tytgat, E. Cisbani, Andreas Schäfer, A. Movsisyan, C. A. Miller, W. Yu, F. Giordano, Wouter Deconinck, V. Zagrebelnyy, B. Marianski, B. Zihlmann, G. Ciullo, W. Augustyniak, G. Gavrilov, Alexander Borissov, H. E. Jackson, C. Van Hulse, V. G. Krivokhijine, H. P. Blok, T. A. Shibata, M. Statera, R.O. Avakian, A. Airapetian, M. Capiluppi, Arne Vandenbroucke, M. Stancari, Alessandra Fantoni, Y. Naryshkin, W.-D. Nowak, Shan Wang, Wolfgang Lorenzon, D. Zeiler, E. De Sanctis, Franco Garibaldi, P. F. Dalpiaz, L. Manfré, P. E. Reimer, M. Hoek, Ivana Hristova, A. Martinez de la Ossa, A. López Ruiz, D. Veretennikov, Paolo Lenisa, S. Yaschenko, S. Joosten, M. Negodaev, I. Vilardi, V. A. Korotkov, Eugenio Nappi, A. Kisselev, V. Kozlov, Luciano Pappalardo, Y. Van Haarlem, A. Rostomyan, A. R. Reolon, A. Avetissian, Y. J. Mao, P. Kravchenko, L. Lapikás, T. Keri, M. Diefenthaler, A. Nass, H. S. Jo, F. Stinzing, J. Stewart, G. Schnell, M. Contalbrigo, E. Avetisyan, G. Elbakian, S. I. Manaenkov, Martin Raithel, E. C. Aschenauer, R. Perez-Benito, V. Vikhrov, M. Hartig, A. Petrosyan, P. Di Nezza, C. Riedl, Morgan Murray, B. Seitz, D. Hasch, K. P. Schüler, P. Zupranski, G. Rosner, R. Truty, N. Akopov, S. Belostotski, G. Karyan, V. Bryzgalov, Frank Ellinghaus, E. R. Kinney, Y. Salomatin, B. Q. Ma, H. Marukyan, R. De Leo, Stephen V. Gliske, L. Felawka, L. Lagamba, Z. Akopov, L. De Nardo, Zhenyu Ye, V. Gharibyan, J. J. M. Steijger, Michael Düren, Cynthia Marie Hadjidakis, and Y. Miyachi

Subjects
Drell-Yan process, HERMES experiment, generalized parton distribution, Nuclear Theory, Hadron, HERMES, Parton, 01 natural sciences, multiple production [charged particle], High Energy Physics - Experiment, HARD-SCATTERING, High Energy Physics - Experiment (hep-ex), semi-inclusive reaction [deep inelastic scattering], transverse momentum [parton], HERMES EXPERIMENT, deep inelastic scattering [positron p], Collins, Nuclear Experiment (nucl-ex), Nuclear Experiment, electroproduction [pi], Physics, FINAL-STATE INTERACTIONS, ANGULAR-DISTRIBUTIONS, PARTON-MODEL, DUAL RADIATOR RICH, angular dependence, modulation, DESY HERA Stor, SPIN PRODUCTION ASYMMETRIES, Nucleon, Quark, Nuclear and High Energy Physics, Particle physics, DRELL-YAN, FOS: Physical sciences, Nuclear physics, angular distribution [charged particle], Pion, 0103 physical sciences, ddc:530, PHYSICS EVENT GENERATION, TRANSVERSE-MOMENTUM, 010306 general physics, deep inelastic scattering [lepton deuteron], 27.6 GeV, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, polarization [quark], Deep inelastic scattering, Physics and Astronomy, electroproduction [K], deep inelastic scattering [electron p], High Energy Physics::Experiment, experimental results
Abstract

The azimuthal cos{\phi} and cos2{\phi} modulations of the distribution of hadrons produced in unpolarized semi-inclusive deep-inelastic scattering of electrons and positrons off hydrogen and deuterium targets have been measured in the HERMES experiment. For the first time these modulations were determined in a four-dimensional kinematic space for positively and negatively charged pions and kaons separately, as well as for unidentified hadrons. These azimuthal dependences are sensitive to the transverse motion and polarization of the quarks within the nucleon via, e.g., the Cahn, Boer-Mulders and Collins effects.

Published
2013

25. Study of spin-density matrix in exclusive electroproduction of ω meson at HERMES

Author

S I Manaenkov

Subjects
Physics, History, Particle physics, Photon, Proton, Meson, HERA, Electron, Helicity, Computer Science Applications, Education, Nuclear physics, Matrix (mathematics), Deuterium, ddc:530, High Energy Physics::Experiment, Nuclear Experiment
Abstract

XVI Dubna Workshop on High Energy Spin Physics, DSPIN-15, Dubna, Russia, 8 Sep 2015 - 12 Sep 2015 ; Journal of physics / Conference Series 678, 012043 (2016). doi:10.1088/1742-6596/678/1/012043, Exclusive electroproduction of ω mesons on unpolarized hydrogen and deuterium targets is studied in the kinematic region of Q2 > 1.0 GeV$^2$, 3.0 GeV < W < 6.3 GeV, and −t′ < 0.2 GeV$^2$. The data were accumulated with the HERMES forward spectrometer during the 1996-2007 running period using the 27.6 GeV longitudinally polarized electron or positron beam of HERA. Spin-density matrix elements are presented in projections of Q2 or −t′. Violation of s-channel helicity conservation is observed for some of these elements. A sizable contribution from unnatural-parity-exchange amplitudes is established for special combinations of spin-density matrix elements. The determination of the virtual-photon longitudinal-to-transverse cross-section ratio reveals that a dominant part of the cross section arises from transversely polarized photons. Good agreement is found between the HERMES proton data and results of a pQCD-inspired Goloskokov-Kroll model that includes pion-pole contributions., Published by IOP Publ., Bristol

Published
2016

26. Multiplicities of charged pions and kaons from semi-inclusive deep-inelastic scattering by the proton and the deuteron

Author

N. Akopov, G. Karyan, V. A. Korotkov, Y. J. Mao, A. Trzcinski, Wouter Deconinck, Frank Ellinghaus, E. R. Kinney, A. Petrosyan, W.-D. Nowak, Andreas Mussgiller, David Mahon, J. Burns, Vitaly Shutov, H. P. Blok, G. Elbakian, L. Manfré, A. Martinez de la Ossa, P. E. Reimer, Wolfgang Lorenzon, Andreas Schäfer, C. A. Miller, Ivana Hristova, Eugenio Nappi, L. De Nardo, Alessandra Fantoni, S. Yaschenko, S. I. Manaenkov, A. Hillenbrand, Y. Imazu, L. Lagamba, M. Diefenthaler, I. Vilardi, S. Belostotski, M. Hoek, Shan Wang, B. Zihlmann, P. F. Dalpiaz, Z. Akopov, Nagao Kobayashi, Zhenyu Ye, V. Zagrebelnyy, V. Bryzgalov, F. Garibaldi, H. S. Jo, W. Augustyniak, Riccardo Fabbri, C. Van Hulse, Alexander Borissov, A. López Ruiz, D. Gabbert, M. Statera, K. Rith, V. Gharibyan, Y. Naryshkin, M. Stancari, Y. Van Haarlem, M. Capiluppi, J. Bowles, I. Brodski, D. Zeiler, C. Vogel, Y. Salomatin, A. Nass, M. Golembiovskaya, A. Rostomyan, A. R. Reolon, A. Avetissian, H. E. Jackson, Stephen V. Gliske, T. Keri, M. Contalbrigo, D. Veretennikov, V. G. Krivokhijine, B. Q. Ma, Martin Raithel, G. Gapienko, J. J. M. Steijger, E. C. Aschenauer, H. Marukyan, R. De Leo, L. Felawka, B. Marianski, Michael Düren, E. De Sanctis, C. Riedl, W. Yu, G. P. Capitani, Michael Tytgat, Adel Terkulov, M. Ehrenfried, Cynthia Marie Hadjidakis, Y. Miyachi, Paolo Lenisa, E. Cisbani, S. Joosten, T. A. Shibata, A. Kisselev, V. Kozlov, V. Gapienko, R.O. Avakian, Morgan Murray, S. Taroian, S. Yen, Luciano Pappalardo, B. Seitz, Andrey V. Izotov, Ralf Kaiser, E. Avetisyan, N. C. R. Makins, E. Steffens, G. Gavrilov, S. Frullani, Dirk Ryckbosch, R. Perez-Benito, B. Maiheu, F. Giordano, G. Ciullo, J. G. Rubin, I. Lehmann, M. Hartig, P. Di Nezza, D. Hasch, M. Negodaev, A. Airapetian, F. Stinzing, G. Schnell, A. Ivanilov, L. Lapikás, P. Kravchenko, J. Stewart, Y. Holler, P. Zupranski, G. Rosner, R. Truty, F. Sanftl, and A. Movsisyan

Subjects
HERMES experiment, AZIMUTHAL DEPENDENCE, FRAGMENTATION FUNCTIONS, Hadron, Parton, HERMES, momentum transfer dependence, 01 natural sciences, 7. Clean energy, CROSS-SECTIONS, High Energy Physics - Experiment, 13.60.-r, 13.60.Le, 13.87.Fh, 14.20.Dh, High Energy Physics - Experiment (hep-ex), semi-inclusive reaction [deep inelastic scattering], LEPTOPRODUCTION, MONTE-CARLO, deep inelastic scattering [positron p], Nuclear Experiment (nucl-ex), Nuclear Experiment, electroproduction [pi], Physics, HERA, fragmentation [quark], DESY HERA Stor, CHAMBERS, FACTORIZATION, Quark, Nuclear and High Energy Physics, Particle physics, Meson, PARTON MODEL, FOS: Physical sciences, x-dependence, Nuclear physics, Pion, 0103 physical sciences, ddc:530, 010306 general physics, deep inelastic scattering [lepton deuteron], 010308 nuclear & particles physics, 27.6 GeV, High Energy Physics::Phenomenology, ELECTROPRODUCTION, Deep inelastic scattering, multiplicity: measured [charged particle], Physics and Astronomy, electroproduction [K], deep inelastic scattering [electron p], High Energy Physics::Experiment, experimental results
Abstract

Multiplicities in semi-inclusive deep-inelastic scattering are presented for each charge state of ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ and ${\mathrm{K}}^{\ifmmode\pm\else\textpm\fi{}}$ mesons. The data were collected by the HERMES experiment at the HERA storage ring using 27.6 GeV electron and positron beams incident on a hydrogen or deuterium gas target. The results are presented as a function of the kinematic quantities ${x}_{\mathrm{B}}$, ${Q}^{2}$, $z$, and ${P}_{h\ensuremath{\perp}}$. They represent a unique data set for identified hadrons that will significantly enhance our understanding of the fragmentation of quarks into final-state hadrons in deep-inelastic scattering.

Published
2012

27. Measurements of double-spin asymmetries associated with deeply virtual Compton scattering on a transversely polarized hydrogen target

Author

V. A. Korotkov, David Mahon, V. A. Kozlov, Andreas Schäfer, Y. J. Mao, G. Ciullo, W. Augustyniak, G. Elbakian, V. Zagrebelnyy, E. De Sanctis, Paolo Lenisa, S. Joosten, V. Gharibyan, G. Gapienko, A. Kisselev, S. I. Manaenkov, P. E. Reimer, Klaus Rith, A. R. Reolon, J. Burns, Y. Naryshkin, P. Kravchenko, M. Hoek, N. C. R. Makins, Z. Akopov, X. R. Lu, M. Contalbrigo, A. Movsisyan, S. Belostotski, V. Bryzgalov, A. Trzcinski, V. A. Gapienko, Martin Raithel, E. C. Aschenauer, N. Bianchi, F. Garibaldi, S. Frullani, B. Marianski, A. Nass, Y. Holler, Adel Terkulov, I. Brodski, E. Avetisyan, Dirk Ryckbosch, S. Yen, Y. Imazu, Ralf Kaiser, P. F. Dalpiaz, H. S. Jo, M. Golembiovskaya, N. Akopov, B. Seitz, E. Nappi, C. A. Miller, Morgan Murray, G. Karyan, A. Fantoni, E. Steffens, Stephen V. Gliske, D. Gabbert, G. Gavrilov, C. Riedl, J. Bowles, Shan Wang, L. Felawka, Wouter Deconinck, L. Lagamba, Riccardo Fabbri, D. Veretennikov, Michael Tytgat, E. Cisbani, G. P. Capitani, M. Statera, D. Zeiler, S. Taroian, P. Di Nezza, F. Giordano, M. Capiluppi, C. B. Van Hulse, B. Zihlmann, Xianguo Lu, M. Negodaev, L. L. Pappalardo, T. A. Shibata, R. Perez-Benito, A. Ivanilov, H. E. Jackson, Alexander Borissov, V. G. Krivokhijine, R.O. Avakian, Vitaly Shutov, H. P. Blok, A. Rostomyan, A. Avetissian, T. Keri, Frank Ellinghaus, Wolfgang Lorenzon, E. R. Kinney, Ivana Hristova, S. Yaschenko, V. Vikhrov, L. Manfré, K. P. Schüler, P. Zupranski, J. G. Rubin, I. Lehmann, G. Rosner, R. Truty, M. Hartig, A. Airapetian, F. Stinzing, A. López Ruiz, Y. Van Haarlem, Andreas Mussgiller, Y. Salomatin, B. Q. Ma, M. Ehrenfried, H. Marukyan, R. De Leo, Y. Miyachi, D. Hasch, G. Schnell, L. Lapikás, J. J. M. Steijger, Michael Düren, W.-D. Nowak, M. Stancari, A. Martinez de la Ossa, L. De Nardo, Zhenyu Ye, and I. Vilardi

Subjects
Nuclear and High Energy Physics, Photon, EVOLUTION KERNELS, HERA, FOS: Physical sciences, HERMES, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), GPDs, GENERALIZED PARTON DISTRIBUTIONS, 0103 physical sciences, ddc:530, NUCLEON, 010306 general physics, DVCS, GPDs, HERMES experiments, Transversely polarized hydrogen target, Physics, Quantum chromodynamics, 010308 nuclear & particles physics, Compton scattering, Transversely polarized hydrogen target, HERMES experiments, Polarization (waves), QCD, Helicity, Transverse plane, Physics and Astronomy, ELECTRON STORAGE-RING, DVCS, Nucleon
Abstract

Double-spin asymmetries in exclusive electroproduction of real photons from a transversely polarized hydrogen target are measured with respect to the product of target polarization with beam helicity and beam charge, and with respect to the product of target polarization with beam helicity alone. The asymmetries arise from the deeply virtual Compton scattering process and its interference with the Bethe--Heitler process. They are related to the real part of the same combination of Compton form factors as that determining the previously published transverse target single-spin asymmetries through the imaginary part. The results for the double-spin asymmetries are found to be compatible with zero within the uncertainties of the measurement, and are not incompatible with the predictions of the only available GPD-based calculation., Comment: 9 pages, 4 figures, and 3 tables

Published
2011

28. Effects of transversity in deep-inelastic scattering by polarized protons

Author

N. C. R. Makins, B. Seitz, U. Elschenbroich, Stephen V. Gliske, G. Gapienko, L. Felawka, G. P. Capitani, P. B. van der Nat, S. Frullani, R. Lamb, F. Sanftl, G. Hill, N. Pickert, Dirk Ryckbosch, Y. J. Mao, P. Kravchenko, J. G. Rubin, A. Movsisyan, C. A. Miller, I. Lehmann, L. Lapikás, Xianguo Lu, M. Negodaev, D. Veretennikov, M. Statera, Y. Holler, Alessandra Fantoni, M. Hoek, S. Belostotski, D. Gabbert, A. Trzcinski, V. A. Gapienko, D. Zeiler, E. De Sanctis, J. Stewart, Y. Salomatin, C. Vogel, V. Bryzgalov, F. Garibaldi, Shan Wang, P. E. Reimer, W. Yu, Paolo Lenisa, L. A. Linden-Levy, S. Joosten, F. Giordano, A. Nass, P. Zupranski, A. Kisselev, J. Burns, Wouter Deconinck, S. Yen, V. A. Korotkov, G. Schnell, Frank Ellinghaus, E. R. Kinney, Hengqiang Ye, P. F. Dalpiaz, Adel Terkulov, T. A. Shibata, C. B. Van Hulse, B. Q. Ma, V. Kozlov, M. Ehrenfried, Luciano Pappalardo, K. Rith, A. Rostomyan, A. R. Reolon, E. Avetisyan, Ralf Kaiser, A. Avetissian, A. Ivanilov, R.O. Avakian, H. S. Jo, H. Marukyan, R. De Leo, G. Ciullo, M. Golembiovskaya, E. Steffens, N. Akopov, G. Elbakian, M. Hartig, G. Karyan, G. Rosner, S. I. Manaenkov, P. Di Nezza, Riccardo Fabbri, W. Augustyniak, M. Diefenthaler, A. López Ruiz, B. Zihlmann, M. Contalbrigo, Michael Tytgat, E. Cisbani, M. Stancari, Alessandro Bacchetta, H. E. Jackson, Martin Raithel, Alexander Borissov, Hasko Stenzel, M. Capiluppi, Y. Van Haarlem, S. Taroian, Nicola Bianchi, T. Keri, R. Perez-Benito, A. Hillenbrand, Y. Imazu, B. Marianski, X. R. Lu, J. Bowles, A. Airapetian, Andreas Mussgiller, F. Stinzing, V. Vikhrov, I. Vilardi, S. Yaschenko, L. De Nardo, Zhenyu Ye, E. C. Aschenauer, Morgan Murray, V. Gharibyan, Cynthia Marie Hadjidakis, Y. Miyachi, D. Hasch, J. J. M. Steijger, Michael Düren, L. Lagamba, Z. Akopov, Nagao Kobayashi, David Mahon, Andreas Schäfer, Y. Naryshkin, C. Riedl, Vitaly Shutov, H. P. Blok, Wolfgang Lorenzon, W.-D. Nowak, L. Manfré, A. Martinez de la Ossa, Ivana Hristova, Eugenio Nappi, and I. Brodsky

Subjects
Nuclear and High Energy Physics, Antiparticle, Meson, Hadron, FOS: Physical sciences, HERMES, Inelastic scattering, COLLINS, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, ASYMMETRIES, LEPTOPRODUCTION, 0103 physical sciences, DISTRIBUTIONS, ddc:530, QUARKS, 010306 general physics, NUCLEON, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Scattering, Collins function, Deep inelastic scattering, QCD, Polarized structure functions, TARGET, Physics and Astronomy, Single-spin asymmetries, Transversity, Antimatter, Semi-inclusive DIS, High Energy Physics::Experiment, Atomic physics
Abstract

Single-spin asymmetries for pions and charged kaons are measured in semi-inclusive deep-inelastic scattering of positrons and electrons off a transversely nuclear-polarized hydrogen target. The dependence of the cross section on the azimuthal angles of the target polarization (phi_S)and the produced hadron (phi) is found to have a substantial sin(phi+phi_S) modulation for the production of pi+, pi- and K+. This Fourier component can be interpreted in terms of non-zero transversity distribution functions and non-zero favored and disfavored Collins fragmentation functions with opposite sign. For pi0 and K- production the amplitude of this Fourier component is consistent with zero., Comment: 7 pages, 3 figures

Published
2010

29. Observation of the Naive-T-odd Sivers Effect in Deep-Inelastic Scattering

Author

P. Lenisa, A. Trzcinski, P. E. Reimer, C. A. Miller, E. De Sanctis, V. Gharibyan, Franco Garibaldi, A. López Ruiz, E. Avetisyan, V. A. Korotkov, Alessandra Fantoni, M. Hoek, M. Contalbrigo, Y. Van Haarlem, L. Lagamba, Z. Akopov, G. Elbakian, D. Gabbert, Y. Salomatin, K. P. Schüler, S. I. Manaenkov, B. Q. Ma, B. Ball, C. B. Van Hulse, Frank Ellinghaus, A. Nass, E. R. Kinney, R. De Leo, H. S. Jo, B. Zihlmann, Shan Wang, Nicola Bianchi, Y. Naryshkin, R. Perez-Benito, E. Cisbani, Alexander Borissov, A. Ivanilov, W. Yu, Xianguo Lu, M. Negodaev, H. Böttcher, J. G. Rubin, M. Ehrenfried, F. Sanftl, Hasko Stenzel, S. Yen, M. Capiluppi, I. Lehmann, W. Augustyniak, J. Stewart, M. Statera, Ralf Kaiser, Andreas Mussgiller, V. A. Gapienko, A. Hillenbrand, Y. Imazu, C. Riedl, S. Yaschenko, Hengqiang Ye, M. Stancari, P. Zupranski, G. Ciullo, D. Zeiler, A. Rostomyan, A. R. Reolon, A. Avetissian, V. Bryzgalov, C. Vogel, H. E. Jackson, A. Movsisyan, N. C. R. Makins, B. Seitz, G. Gapienko, Y. Holler, Stephen V. Gliske, T. A. Shibata, Wouter Deconinck, U. Elschenbroich, Adel Terkulov, Michael Tytgat, J. J. M. Steijger, Michael Düren, P. B. van der Nat, Dirk Ryckbosch, G. Rosner, Vitaly Shutov, H. P. Blok, X. R. Lu, L. Felawka, Wolfgang Lorenzon, S. Taroian, Ivana Hristova, G. Hill, G. P. Capitani, D. Veretennikov, Salvatore Frullani, M. Hartig, P. F. Dalpiaz, R. Lamb, P. Di Nezza, F. Giordano, J. Burns, N. Akopov, K. Rith, A. Airapetian, Y. J. Mao, P. Kravchenko, M. Diefenthaler, J. Dreschler, L. De Nardo, Zhenyu Ye, E. C. Aschenauer, F. Stinzing, David Mahon, Andreas Schäfer, H. Marukyan, L. A. Linden-Levy, Cynthia Marie Hadjidakis, Y. Miyachi, D. Hasch, G. Schnell, W.-D. Nowak, L. Manfré, A. Martinez de la Ossa, L. Lapikás, Eugenio Nappi, C. Bonomo, M. Varanda, T. Keri, V. Vikhrov, Morgan Murray, I. Vilardi, B. Marianski, Arne Vandenbroucke, Riccardo Fabbri, Alessandro Bacchetta, S. Joosten, A. Kisselev, V. Kozlov, Luciano Pappalardo, (Astro)-Particles Physics, Network Institute, Student Lab and Education, and Artificial Intelligence (section level)

Subjects
Particle physics, Meson, Polarized hydrogen target, Hadron, General Physics and Astronomy, FOS: Physical sciences, Elementary particle, Parton, Inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Transverse momentum dependents, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, ddc:550, 010306 general physics, Nuclear Experiment, Physics, Cross section, 010308 nuclear & particles physics, Scattering, Deep inelastic scattering, Parton distribution functions, Single-spin asymmetries, Hydrogen, Distribution functions, High Energy Physics::Experiment
Abstract

Azimuthal single-spin asymmetries of lepto-produced pions and charged kaons were measured on a transversely polarized hydrogen target. Evidence for a naive-T-odd, transverse-momentum-dependent parton distribution function is deduced from non-vanishing Sivers effects for pi+, pi0, and K+, K-, as well as in the difference of the pi+ and pi- cross sections., Comment: 6 pages, 4 figures

Published
2009

30. Nuclear-mass dependence of azimuthal beam-helicity and beam-charge asymmetries in deeply virtual Compton scattering

Author

Y. Holler, D. Veretennikov, Xianguo Lu, M. Negodaev, F. Giordano, Y. Salomatin, P. E. Reimer, M. Contalbrigo, Alessandra Fantoni, Hengqiang Ye, M. Hoek, Rezo Shanidze, Martin Raithel, E. C. Aschenauer, J. Burns, B. Zihlmann, Michael Tytgat, A. Nass, B. Q. Ma, M. Hartig, P. Lenisa, K. Rith, V. A. Korotkov, S. Taroian, Alexander Borissov, B. Ball, C. B. Van Hulse, M. Capiluppi, H. S. Jo, M. Ehrenfried, T. Keri, Salvatore Frullani, M. Statera, A. Airapetian, R. De Leo, A. Ivanilov, P. F. Dalpiaz, Stephen V. Gliske, Shan Wang, V. A. Gapienko, E. Avetisyan, P. Di Nezza, A. Trzcinski, M. Diefenthaler, Valeria Muccifora, C. A. Miller, C. Riedl, G. Elbakian, S. I. Manaenkov, H. Marukyan, N. Akopov, L. Felawka, M. Amarian, S. Yaschenko, S. Haan, G. Hill, S. Joosten, V. Vikhrov, J. G. Rubin, F. Stinzing, X. R. Lu, A. López Ruiz, G. Karyan, I. Lehmann, N. C. R. Makins, G. P. Capitani, W. Yu, A. Kisselev, W. Augustyniak, V. Kozlov, Wouter Deconinck, Ralf Kaiser, Y. Van Haarlem, S. Belostotski, R. Lamb, V. Bryzgalov, Dirk Ryckbosch, M. Stancari, L. Lagamba, Adel Terkulov, A. Rostomyan, A. R. Reolon, G. Ciullo, A. Avetissian, E. Steffens, Luciano Pappalardo, Z. Akopov, T. A. Shibata, P. Zupranski, I. Vilardi, G. Gavrilov, H. Böttcher, R.O. Avakian, G. Gapienko, D. Zeiler, R. Perez-Benito, H. E. Jackson, E. Cisbani, Vadim Guzey, B. Marianski, D. Gabbert, Morgan Murray, K. P. Schüler, Andreas Mussgiller, E. De Sanctis, J. Stewart, Frank Ellinghaus, G. Rosner, Franco Garibaldi, Vitaly Shutov, H. P. Blok, A. Movsisyan, E. R. Kinney, Nicola Bianchi, Wolfgang Lorenzon, Y. Naryshkin, Arne Vandenbroucke, Riccardo Fabbri, A. Hillenbrand, Y. Imazu, Ivana Hristova, J. Bowles, Cynthia Marie Hadjidakis, Y. Miyachi, D. Hasch, L. De Nardo, Zhenyu Ye, V. Gharibyan, J. J. M. Steijger, Michael Düren, W.-D. Nowak, L. Manfré, A. Martinez de la Ossa, H. Guler, Eugenio Nappi, G. Schnell, L. Lapikás, M. Varanda, David Mahon, Andreas Schäfer, Y. J. Mao, and P. Kravchenko

Subjects
Nuclear and High Energy Physics, Particle physics, Photon, Nuclear Theory, HERA, FOS: Physical sciences, IMPACT PARAMETER SPACE, Parton, GENERALIZED PARTON DISTRIBUTIONS, SPIN, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, ddc:530, Nuclear Experiment, 010306 general physics, Physics, Elastic scattering, 010308 nuclear & particles physics, Scattering, Compton scattering, Physics::Accelerator Physics, High Energy Physics::Experiment, Nucleon, Beam (structure)
Abstract

The nuclear-mass dependence of azimuthal cross section asymmetries with respect to charge and longitudinal polarization of the lepton beam is studiedfor hard exclusive electroproduction of real photons. The observed beam-charge and beam-helicity asymmetries are attributed to the interference between the Bethe-Heitler and deeply virtual Compton scattering processes. For various nuclei, the asymmetries are extracted for both coherent and incoherent-enriched regions, which involve different (combinations of) generalized parton distributions. For both regions, the asymmetries are compared to those for a free proton, and no nuclear-mass dependence is found., Comment: 11 pages, 9 figures, 4 tables, minor revisions of text

Published
2009

31. Longitudinal spin transfer to the Lambda hyperon in semiinclusive deep-inelastic scattering

Author

B. Hommez, B. Marianski, K. Sinram, L. De Nardo, A. Osborne, B. Krauss, Zhenyu Ye, Y. Van Haarlem, A. Borissov, V. Gharibyan, K. Hafidi, R. Seidl, P. E. Reimer, M. Bouwhuis, H. Böttcher, M. Diefenthaler, Morgan Murray, G. Iarygin, J. Seele, B. Zihlmann, V. Vikhrov, Manuella Vincter, A. Hillenbrand, Houbing Lu, P. Tait, J. Dreschler, A. Andrus, Cynthia Marie Hadjidakis, Y. Miyachi, J. Wendland, W. Sommer, M. Demey, M. Negodaev, D. Hasch, D. H. Potterveld, Dirk Ryckbosch, H. Marukyan, S. Belostotski, V. Bryzgalov, P. Bailey, I. M. Gregor, Y. Salomatin, Tsutomu Kobayashi, W. Augustyniak, M. Statera, Arne Vandenbroucke, Riccardo Fabbri, C. Vogel, B. Q. Ma, H. P. Blok, M. Beckmann, M. Ehrenfried, R. De Leo, Wolfgang Lorenzon, Andrey V. Izotov, Klaus Rith, J. J. M. Steijger, Michael Düren, T. A. Shibata, V. A. Korotkov, R.O. Avakian, A. Elalaoui-Moulay, Frank Ellinghaus, H. Ohsuga, Ivana Hristova, E. R. Kinney, M. Stancari, A. Jgoun, E. Devitsin, C. Riedl, Y. Naryshkin, Michael Tytgat, H. E. Jackson, A. Kisselev, V. G. Krivokhijine, A. Brüll, P. Lenisa, A. Trzcinski, N. Pickert, D. Reggiani, W.-D. Nowak, G. Elbakian, T. Chen, S. Taroian, C. A. Miller, Eugenio Nappi, S. I. Manaenkov, A. Nagaitsev, K. Oganessyan, A. Rostomyan, Salvatore Frullani, A. Funel, A. R. Reolon, A. Avetissian, G. van der Steenhoven, P. F. Dalpiaz, A. Borysenko, G. Gapienko, K. P. Schüler, I.A. Savin, Andreas Schäfer, E. De Sanctis, T. Michler, Franco Garibaldi, C. Shearer, B. Seitz, B. Maiheu, E. Avetissian, D. Balin, Nicola Bianchi, N. Akopov, O. Mikloukho, U. Elschenbroich, P. B. van der Nat, Y. J. Mao, P. Kravchenko, V. A. Gapienko, P. Di Nezza, P. Liebing, F. Masoli, J. G. Rubin, A. Laziev, H. C. Chiang, Song-Ming Wang, Y. X. Ye, Alessandra Fantoni, M. Hoek, B. Tchuiko, M. Kopytin, T. Keri, Wouter Deconinck, V. Mexner, Hidekazu Tanaka, K. Garrow, V. A. Kozlov, P. Zupranski, L. Lagamba, Z. Akopov, N. Meyners, J. Lu, G. Rosner, S. Yen, Ralf Kaiser, A. Airapetian, E. Steffens, F. Stinzing, G. Gavrilov, Xian Chen, J. Volmer, A. Ivanilov, L. Felawka, M. Amarian, X. R. Lu, M. Contalbrigo, G. P. Capitani, Martin Raithel, E. C. Aschenauer, G. Schnell, V. Shutov, I. Sanjiev, Naomi C R Makins, M. Hartig, A. Reischl, G. Ciullo, L. Rubacek, O. Grebeniouk, L. A. Linden-Levy, Y. Holler, L. Lapikás, J. Stewart, W.H.A. Hesselink, Valeria Muccifora, S. Lu, Adel Terkulov, Hasko Stenzel, M. Capiluppi, (Astro)-Particles Physics, and Photo Conversion Materials

Subjects
HERMES experiment, Nuclear and High Energy Physics, Particle physics, Lambda baryon, Lambda, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Positron, 13.88.+e, 0103 physical sciences, ddc:530, 13.60.−r, 13.60.Rj, SDG 7 - Affordable and Clean Energy, 010306 general physics, Physics, 010308 nuclear & particles physics, Scattering, Hyperon, HERA, Deep inelastic scattering, Physics::Accelerator Physics, High Energy Physics::Experiment
Abstract

The transfer of polarization from a high-energy positron to a {lambda}{sup 0} hyperon produced in semiinclusive deep-inelastic scattering has been measured. The data have been obtained by the HERMES experiment at DESY using the 27.6 GeV longitudinally polarized positron beam of the HERA collider and unpolarized gas targets internal to the positron (electron) storage ring. The longitudinal spin-transfer coefficient is found to be D{sub LL{sup '}}{sup {lambda}}=0.11{+-}0.10(stat){+-}0.03(syst) at an average fractional energy carried by the {lambda}{sup 0} hyperon =0.45. The dependence of D{sub LL{sup '}}{sup {lambda}} on both the fractional energy z and the fractional longitudinal momentum x{sub F} is presented.

Published
2006

32. Transverse polarization of Lambda hyperons from quasireal photoproduction on nuclei

Author

Y. Imazu, J. Bowles, Wouter Deconinck, M. Contalbrigo, C. A. Miller, Morgan Murray, Martin Raithel, P. E. Reimer, T. A. Shibata, E. C. Aschenauer, R.O. Avakian, E. De Sanctis, V. Gharibyan, Franco Garibaldi, M. Negodaev, V. Zagrebelnyy, Andreas Mussgiller, V. A. Gapienko, David Mahon, Y. Holler, Y. J. Mao, W.-D. Nowak, P. Kravchenko, Andreas Schäfer, Valeria Muccifora, Cynthia Marie Hadjidakis, Y. Miyachi, W. Augustyniak, Stephen V. Gliske, A. Martinez de la Ossa, H. S. Jo, Y. Salomatin, G. Schnell, C. Van Hulse, E. Avetisyan, L. Felawka, T. Keri, C. Riedl, D. Hasch, B. Q. Ma, Eugenio Nappi, Salvatore Frullani, K. P. Schüler, W. Yu, S. Yaschenko, G. P. Capitani, S. Belostotski, V. Bryzgalov, M. Stancari, D. Zeiler, R. Perez-Benito, R. De Leo, B. Zihlmann, Klaus Rith, X. R. Lu, B. Marianski, Alexander Borissov, M. Ehrenfried, M. Statera, B. Seitz, P. F. Dalpiaz, Nicola Bianchi, A. Ivanilov, V. A. Korotkov, M. Capiluppi, H. E. Jackson, N. Akopov, V. G. Krivokhijine, V. Vikhrov, L. De Nardo, A. López Ruiz, G. Karyan, Vitaly Shutov, H. P. Blok, Zhenyu Ye, J. G. Rubin, Ralf Kaiser, Frank Ellinghaus, I. Lehmann, P. Lenisa, Adel Terkulov, Y. Van Haarlem, Wolfgang Lorenzon, E. Steffens, Ivana Hristova, E. R. Kinney, A. Trzcinski, G. Gavrilov, Alessandra Fantoni, M. Hoek, Y. Naryshkin, N. C. R. Makins, Arne Vandenbroucke, Riccardo Fabbri, F. Sanftl, G. Ciullo, A. Nass, I. Vilardi, G. Elbakian, D. Gabbert, J. Stewart, Dirk Ryckbosch, M. Hartig, S. I. Manaenkov, L. Lapikás, P. Di Nezza, M. Diefenthaler, H. Marukyan, A. Movsisyan, Michael Tytgat, J. J. M. Steijger, S. Taroian, Michael Düren, L. Lagamba, S. Joosten, A. Kisselev, Z. Akopov, V. Kozlov, Nagao Kobayashi, Luciano Pappalardo, P. Zupranski, G. Rosner, E. Cisbani, R. Truty, I. Brodski, A. Airapetian, Shan Wang, F. Stinzing, A. Rostomyan, A. R. Reolon, A. Avetissian, G. Gapienko, J. Burns, M. Golembiovskaya, D. Veretennikov, F. Giordano, A. Hillenbrand, Student Lab and Education, and (Astro)-Particles Physics

Subjects
HERMES experiment, ENERGIES, Nuclear Theory, 25.30.Rw Electroproduction reactions, HERMES, transverse momentum dependence, High Energy Physics - Experiment, Economica, Xenon, neon, HADRONIZATION, Nuclear Experiment, 13.60.Rj Baryon production, 13.88.+e Polarization in interactions and scattering, 14.20.Jn Hyperons, 25.30.Rw Electroproduction reactions, Physics, photoproduction [Lambda], dependence [mass number], 14.20.Jn Hyperons, HERA, Polarization (waves), INCLUSIVE PRODUCTION, DESY HERA Stor, GEV/C, P INTERACTIONS, polarization [Lambda], internal [polarized target], deuteron, COLLISIONS, Nuclear and High Energy Physics, Particle physics, transverse [polarization], chemistry.chemical_element, helium, Nuclear physics, inclusive reaction [electron nucleus], TARGETS, target [gas], Physics::Atomic and Molecular Clusters, ddc:530, 13.88.+e Polarization in interactions and scattering, krypton, 13.60.Rj Baryon production, 27.6 GeV, Krypton, High Energy Physics::Phenomenology, Hyperon, xenon, GEV-C, Physics and Astronomy, chemistry, High Energy Physics::Experiment, inclusive reaction [electron p], Storage ring, Lepton, experimental results
Abstract

The transverse polarization of $\Lambda$ hyperons was measured in inclusive quasireal photoproduction for various target nuclei ranging from hydrogen to xenon. The data were obtained by the HERMES experiment at HERA using the 27.6 GeV lepton beam and nuclear gas targets internal to the lepton storage ring. The polarization observed is positive for light target nuclei and is compatible with zero for krypton and xenon., Comment: final version to be published in Phys. Rev. D (in press)

Published
2014

33. The Flavor Asymmetry of the Light Quark Sea from Semi-inclusive Deep-inelastic Scattering

Author

K. Ackerstaff, A. Airapetian, N. Akopov, I. Akushevich, M. Amarian, E. C. Ashenauer, H. Avakian, R. Avakian, A. Avetissian, B. Bains, C. Baumgarten, M. Beckmann, St. Belostotski, J. E. Belz, Th. Benisch, S. Bernreuther, N. Bianchi, J. Blouw, H. Böttcher, A. Borissov, J. Brack, S. Brauksiepe, B. Braun, B. Bray, St. Brons, W. Brückner, A. Brüll, E. E. W. Bruins, H. J. Bulten, R. V. Cadman, G. P. Capitani, P. Carter, P. Chumney, E. Cisbani, G. R. Court, P. F. Dalpiaz, E. De Sanctis, D. De Schepper, E. Devitsin, P. K. A. de Witt Huberts, P. Di Nezza, M. Düren, A. Dvoredsky, G. Elbakian, A. Fantoni, A. Fechtchenko, M. Ferstl, K. Fiedler, B. W. Filippone, H. Fischer, B. Fox, J. Franz, S. Frullani, M.-A. Funk, N. D. Gagunashvili, H. Gao, Y. Gärber, F. Garibaldi, G. Gavrilov, P. Geiger, V. Gharibyan, V. Giordjian, A. Golendukhin, G. Graw, O. Grebeniouk, P. W. Green, L. G. Greeniaus, C. Grosshauser, A. Gute, W. Haeberli, J.-O. Hansen, D. Hasch, O. Häusser, R. Henderson, Th. Henkes, M. Henoch, R. Hertenberger, Y. Holler, R. J. Holt, W. Hoprich, H. Ihssen, M. Iodice, A. Izotov, H. E. Jackson, A. Jgoun, R. Kaiser, E. Kinney, A. Kisselev, P. Kitching, H. Kobayashi, N. Koch, K. Königsmann, M. Kolstein, H. Kolster, V. Korotkov, W. Korsch, V. Kozlov, L. H. Kramer, V. G. Krivokhijine, M. Kurisuno, G. Kyle, W. Lachnit, W. Lorenzon, N. C. R. Makins, S. I. Manaenkov, F. K. Martens, J. W. Martin, F. Masoli, A. Mateos, M. McAndrew, K. McIlhany, R. D. McKeown, F. M. Menden, F. Meissner, A. Metz, N. Meyners, O. Mikloukho, C. A. Miller, M. A. Miller, R. Milner, V. Mitsyn, A. Most, R. Mozzetti, V. Muccifora, A. Nagaitsev, Y. Naryshkin, A. M. Nathan, F. Neunreither, M. Niczyporuk, W.-D. Nowak, M. Nupieri, T. G. O'Neill, J. Ouyang, B. R. Owen, V. Papavassiliou, S. F. Pate, M. Pitt, S. Potashov, D. H. Potterveld, G. Rakness, A. Reali, R. Redwine, A. R. Reolon, R. Ristinen, K. Rith, H. Roloff, P. Rossi, S. Rudnitsky, M. Ruh, D. Ryckbosch, Y. Sakemi, I. Savin, F. Schmidt, H. Schmitt, G. Schnell, K. P. Schüler, A. Schwind, T.-A. Shibata, K. Shibatani, T. Shin, V. Shutov, C. Simani, A. Simon, K. Sinram, P. Slavich, M. Spengos, E. Steffens, J. Stenger, J. Stewart, U. Stoesslein, M. Sutter, H. Tallini, S. Taroian, A. Terkulov, B. Tipton, M. Tytgat, G. M. Urciuoli, J. J. van Hunen, R. van de Vyver, J. F. J. van den Brand, G. van der Steenhoven, M. C. Vetterli, M. G. Vincter, E. Volk, W. Wander, S. E. Williamson, T. Wise, K. Woller, S. Yoneyama, H. Zohrabian, and (Astro)-Particles Physics

Subjects
Quark, Particle physics, Proton, media_common.quotation_subject, High Energy Physics::Lattice, Nuclear Theory, General Physics and Astronomy, FOS: Physical sciences, PROTON, 01 natural sciences, 7. Clean energy, Asymmetry, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Pion, DRELL-YAN PROCESS, 0103 physical sciences, 010306 general physics, NUCLEON, Nuclear Experiment, media_common, Physics, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, Deep inelastic scattering, Deuterium, PARTON DISTRIBUTIONS, High Energy Physics::Experiment, Nucleon, BREAKING
Abstract

The flavor asymmetry of the light quark sea of the nucleon is determined in the kinematic range 0.02, Comment: 7 Pages, 2 figures, RevTeX format; slight revision in text, small change in extraction of dbar-ubar and comparison with a high q2 parameterization

Published
1998

34. Measurement of Longitudinal Spin Transfer to Lambda Hyperons in Deep Inelastic Lepton Scattering

Author

Th. Benisch, H. E. Jackson, V. G. Krivokhijine, A. Nagaitsev, S. Bernreuther, T. A. Shibata, Haiyan Gao, C. Baumgarten, M. Amarian, B. Braun, Michel Vetterli, F. Menden, S. Brauksiepe, Andrey V. Izotov, R.O. Avakian, Evaristo Cisbani, G. Rakness, E. Devitsin, V. A. Kozlov, W.-D. Nowak, N. Akopov, A. Metz, Ralf Kaiser, M. Guidal, A. Reali, Valeria Muccifora, A.O. Mateos, B. D. Fox, A. R. Reolon, A. Avetissian, W. Lachnit, A. Airapetian, G. S. Kyle, V. A. Korotkov, M. Iodice, E. Steffens, M. Henoch, A. Kisselev, A. Borissov, Robert Henderson, M. Kurisuno, M. Sutter, G. M. Urciuoli, A. Simon, G. Gavrilov, M. Düren, R. D. McKeown, P. Geiger, R. J. Holt, G. P. Capitani, J. van Hunen, Klaus Rith, M. Kolstein, M. Ruh, Adel Terkulov, F. Masoli, J. Visser, A. Dvoredsky, L. G. Greeniaus, S. Yoneyama, R. Mussa, Wolfgang Lorenzon, B. Tipton, F. Neunreither, P. Carter, R. Openshaw, B. R. Owen, E. De Sanctis, C. Scarlett, H. Schmitt, H. Avakian, Y. Gärber, U. Stosslein, Y. Holler, Michael Tytgat, S. Taroian, P. Rossi, Salvatore Frullani, E. E. W. Bruins, A. Fechtchenko, B. Bray, Franco Garibaldi, P. F. Dalpiaz, K. Königsmann, R. P. Redwine, E. Thomas, Michael Pitt, A. Brüll, C. A. Miller, G. Schnell, W. Wander, J. Ely, A. Jgoun, G. Elbakian, A. Gute, W. Brückner, S. E. Williamson, S. Belostotski, P.K.A. de Witt Huberts, P. Kitching, Ross Milner, H. Kolster, O. Grebeniouk, S. I. Manaenkov, Alessandra Fantoni, T. Shin, M. Nupieri, G. van der Steenhoven, G. Graw, A. Golendukhin, H. J. Bulten, Alan M. Nathan, F.H. Heinsius, P. Chumney, E. C. Aschenauer, E. R. Kinney, V. Shutov, V. Vikhrov, B. Bains, L. H. Kramer, Wolfgang Korsch, Y. Naryshkin, C. Simani, Naomi C R Makins, F. Meissner, V. Gyurjyan, Manuella Vincter, M.-A. Funk, E. Volk, Ralf Hertenberger, H. Ihssen, J. P. Haas, A. Schwind, Hiroaki Kobayashi, K. Fiedler, K. Shibatani, K. Woller, M. Spengos, J. Franz, K. McIlhany, I.A. Savin, P.W. Green, G.R. Court, M. McAndrew, H. Tallini, J. W. Martin, S. Rudnitsky, Dirk Ryckbosch, Thomas O'Neill, K. P. Schüler, N. Koch, Nicola Bianchi, O. Mikloukho, S. Potashov, H. Zohrabian, M. Kirsch, P. Di Nezza, M. A. Miller, C. Grosshauser, R. A. Ristinen, J. M. Niczyporuk, N. Meyners, J.-O. Hansen, M. Ferstl, M. Bouwhuis, H. Böttcher, S. F. Pate, V. Papavassiliou, R. Van de Vyver, P. Slavich, Jeffrey Brack, J. Stenger, J. E. Belz, J. Stewart, W. Haeberli, P. Lenisa, J. Seibert, J. Wendland, D. Hasch, B. W. Filippone, J. Blouw, D. H. Potterveld, W. Hoprich, H. Fischer, O. Häusser, D. De Schepper, K. Sinram, T. Wise, V. Gharibyan, F. Schmidt, M. Beckmann, J. F. J. van den Brand, Yasuhiro Sakemi, Jinsong Ouyang, M. Hartig, S. Brons, F. K. Martens, and (Astro)-Particles Physics

Subjects
Photon, HERMES, (p pi-) [mass spectrum], PROTON, 01 natural sciences, polarization [up], High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 27.5 GeV, angular distribution, deep inelastic scattering [positron p], STRUCTURE-FUNCTION G(1)(P), NUCLEON, Nuclear Experiment, Physics, BARYONS, Spin polarization, HERA, Helicity, DESY HERA Stor, polarization [Lambda], +p+pi%22">Lambda --> p pi, Quark, fragmentation [up], Nuclear and High Energy Physics, Particle physics, electroproduction [Lambda], MUON SCATTERING, FOS: Physical sciences, Nuclear physics, ASYMMETRIES, 0103 physical sciences, ddc:530, SDG 7 - Affordable and Clean Energy, 010306 general physics, Z-DECAYS, quark model parton, 010308 nuclear & particles physics, Hyperon, (LAMBDA)OVER-BAR POLARIZATION, Deep inelastic scattering, conservation law [helicity], DEUTERON, High Energy Physics::Experiment, polarized beam [positron], +Lambda%22">positron p --> Lambda, POLARIZED QUARK DISTRIBUTIONS, Lepton, experimental results
Abstract

Spin transfer in deep-inelastic Lambda electroproduction has been studied with the HERMES detector using the 27.6 GeV polarized positron beam in the HERA storage ring. For an average fractional energy transfer = 0.45, the longitudinal spin transfer from the virtual photon to the Lambda has been extracted. The spin transfer along the Lambda momentum direction is found to be 0.11 +/- 0.17 (stat) +/- 0.03 (sys); similar values are found for other possible choices for the longitudinal spin direction of the Lambda. This result is the most precise value obtained to date from deep-inelastic scattering with charged lepton beams, and is sensitive to polarized up quark fragmentation to hyperon states. The experimental result is found to be in general agreement with various models of the Lambda spin content, and is consistent with the assumption of helicity conservation in the fragmentation process., Comment: 8 pages, 3 figures; new version has an expanded discussion and small format changes

Published
2001

35. Perturbation theory for resonance and virtual states

Author

S. I. Manaenkov

Subjects
Physics, Scattering, Quantum mechanics, Quantum electrodynamics, Bound state, Statistical and Nonlinear Physics, Scattering theory, Perturbation theory, Resonance (particle physics), Mathematical Physics, Energy (signal processing)
Published
1972

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