Experimental access to Transition Distribution Amplitudes with the PANDA experiment at FAIR
(2015) In European Physical Journal A. Hadrons and Nuclei 51(8).- 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 (pi N) TDAs from (p) over barp -> e(+)e(-)pi(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 (p) over barp -> e(+)e(-)pi(0) admits a QCD factorized description in terms of pi N TDAs and nucleon Distribution Amplitudes (DAs) in the forward aid backward kinematic regimes. Assuming the validity of this... (More)
- 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 (pi N) TDAs from (p) over barp -> e(+)e(-)pi(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 (p) over barp -> e(+)e(-)pi(0) admits a QCD factorized description in terms of pi N TDAs and nucleon Distribution Amplitudes (DAs) in the forward aid backward kinematic regimes. Assuming the validity of this factorized description, we perform feasibility studies for measuring (p) over barp -> e(+)e(-)pi(0) with the PANDA detector. Detailed simulations on signal reconstruction efficiency as well as on rejection of the most severe background channel, i.e. (p) over barp -> pi(+)pi(-)pi(0) were performed for the center-of-mass energy squared s = 5 GeV2 and s = 10 GeV2, in the kinematic regions 3.0 < q(2) < 4.3 GeV2 and 5 < q(2) < 9 GeV2, respectively, with a neutral pion scattered in the forward or backward cone vertical bar cos theta(pi 0)vertical bar > 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 . 10(7) (1 . 10(7)) at low (high) q(2) for s = 5 GeV2, and of 1 . 10(8) (6 . 10(6)) at low (high) q(2) 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 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 pi N TDAs. (Less)
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https://lup.lub.lu.se/record/7964915
- author
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- European Physical Journal A. Hadrons and Nuclei
- volume
- 51
- issue
- 8
- article number
- 107
- publisher
- Springer
- external identifiers
-
- wos:000360439700001
- scopus:84940490717
- ISSN
- 1434-6001
- DOI
- 10.1140/epja/i2015-15107-y
- language
- English
- LU publication?
- yes
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- 7bcccb64-b500-4d74-ae77-ce825dd6d397 (old id 7964915)
- date added to LUP
- 2016-04-01 15:01:32
- date last changed
- 2022-04-14 20:52:00
@article{7bcccb64-b500-4d74-ae77-ce825dd6d397, 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 (pi N) TDAs from (p) over barp -> e(+)e(-)pi(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 (p) over barp -> e(+)e(-)pi(0) admits a QCD factorized description in terms of pi N TDAs and nucleon Distribution Amplitudes (DAs) in the forward aid backward kinematic regimes. Assuming the validity of this factorized description, we perform feasibility studies for measuring (p) over barp -> e(+)e(-)pi(0) with the PANDA detector. Detailed simulations on signal reconstruction efficiency as well as on rejection of the most severe background channel, i.e. (p) over barp -> pi(+)pi(-)pi(0) were performed for the center-of-mass energy squared s = 5 GeV2 and s = 10 GeV2, in the kinematic regions 3.0 < q(2) < 4.3 GeV2 and 5 < q(2) < 9 GeV2, respectively, with a neutral pion scattered in the forward or backward cone vertical bar cos theta(pi 0)vertical bar > 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 . 10(7) (1 . 10(7)) at low (high) q(2) for s = 5 GeV2, and of 1 . 10(8) (6 . 10(6)) at low (high) q(2) 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 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 pi N TDAs.}}, author = {{Singh, B. P. and Erni, W. and Keshelashvili, I. and Krusche, B. and Steinacher, M. and Liu, B. and Liu, H. and Liu, Z. and Shen, X. and Wang, C. and Zhao, J. and Albrecht, M. and Fink, M. and Heinsius, F. H. and Held, T. and Holtmann, T. and Koch, H. and Kopf, B. and Kuemmel, M. and Kuhl, G. and Kuhlmann, M. and Leyhe, M. and Mikirtychyants, M. and Musiol, P. and Mustafa, A. and Pelizaeus, M. and Pychy, J. and Richter, M. and Schnier, C. and Schroeder, T. and Sowa, C. and Steinke, M. and Triffterer, T. and Wiedner, U. and Beck, R. and Hammann, C. and Kaiser, D. and Ketzer, B. and Kube, M. and Mahlberg, P. and Rossbach, M. and Schmidt, C. and Schmitz, R. and Thoma, U. and Walther, D. and Wendel, C. and Wilson, A. and Bianconi, A. and Bragadireanu, M. and Caprini, M. and Pantea, D. and Pietreanu, D. and Vasile, M. E. and Patel, B. and Kaplan, D. and Brandys, P. and Czyzewski, T. and Czyzycki, W. and Domagala, M. and Hawryluk, M. and Filo, G. and Krawczyk, M. and Kwiatkowski, D. and Lisowski, E. and Lisowski, F. and Fiutowski, T. and Idzik, M. and Mindur, B. and Przyborowski, D. and Swientek, K. and Czech, B. and Kliczewski, S. and Korcyl, K. and Kozela, A. and Kulessa, P. and Lebiedowicz, P. and Malgorzata, K. and Pysz, K. and Schaefer, W. and Siudak, R. and Szczurek, A. and Biernat, J. and Jowzaee, S. and Kamys, B. and Kistryn, S. and Korcyl, G. and Krzemien, W. and Magiera, A. and Moskal, P. and Palka, M. and Psyzniak, A. and Rudy, Z. and Salabura, P. and Smyrski, J. and Strzempek, P. and Wronska, A. and Augustin, I. and Lehmann, I. and Nicmorus, D. and Schepers, G. and Schmitt, L. and Al-Turany, M. and Cahit, U. and Capozza, L. and Dbeyssi, A. and Deppe, H. and Dzhygadlo, R. and Ehret, A. and Flemming, H. and Gerhardt, A. and Goetzen, K. and Karabowicz, R. and Kliemt, R. and Kunkel, J. and Kurilla, U. and Lehmann, D. and Luhning, J. and Maas, F. and Morales, C. 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N. and Strokovsky, E. A. and Suleimanov, M. K. and Teshev, R. Sh. and Tokmenin, V. V. and Uzhinsky, V. V. and Vodopyanov, A. S. and Zaporozhets, S. A. and Zhuravlev, N. I. and Zorin, A. G. and Branford, D. and Glazier, D. and Watts, D. and Woods, P. and Britting, A. and Eyrich, W. and Lehmann, A. and Uhlig, F. and Dobbs, S. and Seth, K. and Tomaradze, A. and Xiao, T. and Bettoni, D. and Carassiti, V. and Ramusino, A. Cotta and Dalpiaz, P. and Drago, A. and Fioravanti, E. and Garzia, I. and Savrie, M. and Stancari, G. and Akishina, V. and Kisel, I. and Kulakov, I. and Zyzak, M. and Arora, R. and Bel, T. and Gromliuk, A. and Kalicy, G. and Krebs, M. and Patsyuk, M. and Zuehlsdorf, M. and Bianchi, N. and Gianotti, P. and Guaraldo, C. and Lucherini, V. and Pace, E. and Bersani, A. and Bracco, G. and Macri, M. and Parodi, R. F. and Bianco, S. and Bremer, D. and Brinkmann, K. 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P. and Kumar, A. and Roy, A. and Sahoo, R. and Sohlbach, H. and Buescher, M. and Cao, L. and Cebulla, A. and Deermann, D. and Dosdall, R. and Esch, S. and Georgadze, I. and Gillitzer, A. and Goerres, A. and Goldenbaum, F. and Grunwald, D. and Herten, A. and Hu, Q. and Kemmerling, G. and Kleines, H. and Kozlov, V. and Lehrach, A. and Leiber, S. and Maier, R. and Nellen, R. and Ohm, H. and Orfanitski, S. and Prasuhn, D. and Prencipe, E. and Ritman, J. and Schadmand, S. and Schumann, J. and Sefzick, T. and Serdyuk, V. and Sterzenbach, G. and Stockmanns, T. and Wintz, P. and Wuestner, P. and Xu, H. and Li, S. and Li, Z. and Sun, Z. and Xu, H. and Rigato, V. and Fissum, S. and Hansen, Kurt and Isaksson, Lennart and Lundin, Magnus and Schröder, Bent and Achenbach, P. and Bleser, S. and Cardinali, M. and Corell, O. and Deiseroth, M. and Denig, A. and Distler, M. and Feldbauer, F. and Fritsch, M. and Jasinski, P. and Hoek, M. and Kangh, D. and Karavdina, A. and Lauth, W. and Leithoff, H. and Merkel, H. and Michel, M. and Motzko, C. and Mueller, U. and Noll, O. and Plueger, S. and Pochodzalla, J. and Sanchez, S. and Schlimme, S. and Sfienti, C. and Steinen, M. and Thiel, M. and Weber, T. and Zambrana, M. and Dormenev, V. 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K. and Godre, S. S. and Duchat, R. and Amoroso, A. and Bussa, M. P. and Busso, L. and De Mori, F. and Destefanis, M. and Fava, L. and Ferrero, L. and Greco, M. and Maggiora, M. and Maniscalco, G. and Marcello, S. and Sosio, S. and Spataro, S. and Zotti, L. and Calvo, D. and Coli, S. and De Remigis, P. and Filippi, A. and Giraudo, G. and Lusso, S. and Mazza, G. and Mingnore, M. and Rivetti, A. and Wheadon, R. and Balestra, F. and Iazzi, F. and Introzzi, R. and Lavagno, A. and Younis, H. and Birsa, R. and Bradamante, F. and Bressan, A. and Martin, A. and Clement, H. and Galnander, B. and Balkestahl, L. Caldeira and Calen, H. and Fransson, K. and Johansson, T. and Kupsc, A. and Marciniewski, P. and Pettersson, J. and Schonning, K. and Wolke, M. and Zlomanczuk, J. and Diaz, J. and Ortiz, A. and Vinodkumar, P. C. and Parmar, A. and Chlopik, A. and Melnychuk, D. and Slowinski, B. and Trzcinski, A. and Wojciechowski, M. and Wronka, S. and Zwieglinski, B. and Buhler, P. and Marton, J. and Suzuki, K. and Widmann, E. and Zmeskal, J. and Froehlich, B. and Khaneft, D. and Lin, D. and Zimmermann, I. and Semenov-Tian-Shansky, K.}}, issn = {{1434-6001}}, language = {{eng}}, number = {{8}}, publisher = {{Springer}}, series = {{European Physical Journal A. Hadrons and Nuclei}}, title = {{Experimental access to Transition Distribution Amplitudes with the PANDA experiment at FAIR}}, url = {{http://dx.doi.org/10.1140/epja/i2015-15107-y}}, doi = {{10.1140/epja/i2015-15107-y}}, volume = {{51}}, year = {{2015}}, }