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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 (πN) TDAs from ¯pp → e+e−π0 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 q2, the amplitude of the signal channel pp¯ → e+e−π0 admits a QCD factorized description in terms of πN 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 ¯pp → e+e−π0 with the PANDA detector. Detailed simulations on signal reconstruction efficiency as well as on rejection of the most severe background channel, i.e. pp¯ → π+π−π0 were performed for the center-of-mass energy squared s = 5 GeV2 and s = 10 GeV2, in the kinematic regions 3.0 < q2 < 4.3 GeV2 and 5 < q2 < 9 GeV2, respectively, with a neutral pion scattered in the forward or backward cone | cos θπ0 | > 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 · 107 (1 · 107) at low (high) q2 for s = 5 GeV2, and of 1 · 108 (6 · 106) at low (high) q2 for s = 10 GeV2, 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. The cross sections obtained from the simulations are used to show that a test of QCD collinear factorization can be done at the lowest order by measuring scaling laws and angular distributions. The future measurement of the signal channel cross section with PANDA will provide a new test of the perturbative QCD description of a novel class of hard exclusive reactions and will open the possibility of experimentally accessing πN TDAs.
Experimental access to Transition Distribution Amplitudes with the P̄ANDA experiment at FAIR / The PANDA Collaboration, N., 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., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI. - ISSN 1434-6001. - STAMPA. - 51:8(2015), pp. 107.1-107.19. [10.1140/epja/i2015-15107-y]
Experimental access to Transition Distribution Amplitudes with the P̄ANDA experiment at FAIR
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.;Xu, H.;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.;Semenov Tian Shansky, K.
2015-01-01
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 (πN) TDAs from ¯pp → e+e−π0 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 q2, the amplitude of the signal channel pp¯ → e+e−π0 admits a QCD factorized description in terms of πN 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 ¯pp → e+e−π0 with the PANDA detector. Detailed simulations on signal reconstruction efficiency as well as on rejection of the most severe background channel, i.e. pp¯ → π+π−π0 were performed for the center-of-mass energy squared s = 5 GeV2 and s = 10 GeV2, in the kinematic regions 3.0 < q2 < 4.3 GeV2 and 5 < q2 < 9 GeV2, respectively, with a neutral pion scattered in the forward or backward cone | cos θπ0 | > 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 · 107 (1 · 107) at low (high) q2 for s = 5 GeV2, and of 1 · 108 (6 · 106) at low (high) q2 for s = 10 GeV2, 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. The cross sections obtained from the simulations are used to show that a test of QCD collinear factorization can be done at the lowest order by measuring scaling laws and angular distributions. The future measurement of the signal channel cross section with PANDA will provide a new test of the perturbative QCD description of a novel class of hard exclusive reactions and will open the possibility of experimentally accessing πN TDAs.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2874332
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Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande.
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