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Search for odderon-induced contributions to exclusive pi(0) photoproduction at HERA

Adloff, C; Andreev, V; Andrieu, B; Anthonis, T; Arkadov, V; Astvatsatourov, A; Babaev, A; Bahr, J; Baranov, P and Barrelet, E, et al. (2002) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 544(1-2). p.35-43
Abstract
A search for contributions to the reaction ep --> epi(0)N* from photon-odderon fusion in the photoproduction regime at HERA is reported, at an average photon-proton centre-of-mass energy <W> = 215 GeV. The measurement proceeds via detection of the pi(0) decay photons, a leading neutron from the N* decay, and the scattered electron. No pi(0) signal is observed and an upper limit on the cross section for the photon-odderon fusion process of sigma(gammap --> pi(0)N*) < 49 nb at the 95% confidence level is derived, integrated over the experimentally accessible range of the squared four-momentum transfer at the nucleon vertex 0.02 < < 0.3 GeV2. This excludes a recent prediction from a calculation based on a... (More)
A search for contributions to the reaction ep --> epi(0)N* from photon-odderon fusion in the photoproduction regime at HERA is reported, at an average photon-proton centre-of-mass energy <W> = 215 GeV. The measurement proceeds via detection of the pi(0) decay photons, a leading neutron from the N* decay, and the scattered electron. No pi(0) signal is observed and an upper limit on the cross section for the photon-odderon fusion process of sigma(gammap --> pi(0)N*) < 49 nb at the 95% confidence level is derived, integrated over the experimentally accessible range of the squared four-momentum transfer at the nucleon vertex 0.02 < < 0.3 GeV2. This excludes a recent prediction from a calculation based on a non-perturbative QCD model of a photon-odderon fusion cross section above 200 nb. (C) 2002 Elsevier Science B.V. All rights reserved. (Less)
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Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
544
issue
1-2
pages
35 - 43
publisher
Elsevier
external identifiers
  • wos:000178437300005
  • scopus:0037136595
ISSN
0370-2693
DOI
10.1016/S0370-2693(02)02479-6
language
English
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2007-08-06 10:48:13
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@article{1f9c101f-8bfe-4e73-9fa1-0277bdec6c2f,
  abstract     = {A search for contributions to the reaction ep --&gt; epi(0)N* from photon-odderon fusion in the photoproduction regime at HERA is reported, at an average photon-proton centre-of-mass energy &lt;W&gt; = 215 GeV. The measurement proceeds via detection of the pi(0) decay photons, a leading neutron from the N* decay, and the scattered electron. No pi(0) signal is observed and an upper limit on the cross section for the photon-odderon fusion process of sigma(gammap --&gt; pi(0)N*) &lt; 49 nb at the 95% confidence level is derived, integrated over the experimentally accessible range of the squared four-momentum transfer at the nucleon vertex 0.02 &lt; 	 &lt; 0.3 GeV2. This excludes a recent prediction from a calculation based on a non-perturbative QCD model of a photon-odderon fusion cross section above 200 nb. (C) 2002 Elsevier Science B.V. All rights reserved.},
  author       = {Adloff, C and Andreev, V and Andrieu, B and Anthonis, T and Arkadov, V and Astvatsatourov, A and Babaev, A and Bahr, J and Baranov, P and Barrelet, E and Bartel, W and Becker, J and Beglarian, A and Behnke, O and Beier, C and Belousov, A and Berger, C and Berndt, T and Bizot, JC and Bohme, J and Boudry, V and Braunschweig, W and Brisson, V and Broker, HB and Brown, DP and Bruckner, W and Bruncko, D and Burger, J and Busser, FW and Bunyatyan, A and Burrage, A and Buschhorn, G and Bystritskaya, L and Campbell, AJ and Cao, J and Caron, S and Cassol-Brunner, F and Clarke, D and Collard, C and Contreras, JG and Coppens, YR and Coughlan, JA and Cousinou, MC and Cox, BE and Cozzika, G and Cvach, J and Dainton, JB and Dau, WD and Daum, K and Davidsson, Mattias and Delcourt, B and Delerue, N and Demirchyan, R and De Roeck, A and De Wolf, EA and Diaconu, C and Dingfelder, J and Dixon, P and Dodonov, V and Dowell, JD and Droutskoi, A and Dubak, A and Duprel, C and Eckerlin, G and Eckstein, D and Efremenko, V and Egli, S and Eichler, R and Eisele, F and Eisenhandler, E and Ellerbrock, M and Elsen, E and Erdmann, A and Erdmann, W and Faulkner, PJW and Favart, L and Fedotov, A and Felst, R and Ferencei, J and Ferron, S and Fleischer, M and Fleming, YH and Flugge, G and Fomenko, A and Foresti, I and Formanek, J and Franke, G and Gabathuler, E and Gabathuler, K and Garvey, J and Gassner, J and Gayler, J and Gerhards, R and Gerlich, C and Ghazaryan, S and Goerlich, L and Gogitidze, N and Golling, T and Grab, C and Grabski, V and Grassler, H and Greenshaw, T and Grindhammer, G and Hadig, T and Haidt, D and Hajduk, L and Haller, J and Haynes, WJ and Heinemann, B and Heinzelmann, G and Henderson, RCW and Hengstmann, S and Henschel, H and Heremans, R and Herrera, G and Herynek, I and Hildebrandt, M and Hilgers, M and Hiller, KH and Hladky, J and Hoting, P and Hoffmann, D and Horisberger, R and Hovhannisyan, A and Hurling, S and Ibbotson, M and Issever, C and Jacquet, M and Jaffre, M and Janauschek, L and Janssen, X and Jemanov, V and Jönsson, Leif and Johnson, C and Johnson, DP and Jones, MAS and Jung, Hannes and Kant, D and Kapichine, M and Karlsson, Martin and Karschnick, O and Keil, F and Keller, N and Kennedy, J and Kenyon, IR and Kermiche, S and Kiesling, C and Kjellberg, Pär and Klein, M and Kleinwort, C and Kluge, T and Knies, G and Koblitz, B and Kolya, SD and Korbel, V and Kostka, P and Kotelnikov, SK and Koutouev, R and Koutov, A and Krehbiel, H and Kroseberg, J and Kruger, K and Kupper, A and Kuhr, T and Kurca, T and Lamb, D and Landon, MPJ and Lange, W and Lastovicka, T and Laycock, P and Lebailly, E and Lebedev, A and Leissner, B and Lemrani, R and Lendermann, V and Levonian, S and Lindström, Magnus and List, B and Lobodzinska, E and Lobodzinski, B and Loginov, A and Loktionova, N and Lubimov, V and Luders, S and Luke, D and Lytkin, L and Mahlke-Kruger, H and Malden, N and Malinovski, E and Malinovski, I and Maracek, R and Marage, P and Marks, J and Marshall, R and Martyn, HU and Martyniak, J and Maxfield, SJ and Meer, D and Mehta, A and Meier, K and Meyer, AB and Meyer, H and Meyer, J and Meyer, PO and Mikocki, S and Milstead, D and Mkrtchyan, T and Mohr, R and Mohrdieck, S and Mondragon, MN and Moreau, F and Morozov, A and Morris, JV and Muller, K and Murin, P and Nagovizin, V and Naroska, B and Naumann, J and Naumann, T and Nellen, G and Newman, PR and Niebergall, F and Niebuhr, C and Nix, O and Nowak, G and Olsson, JE and Ozerov, D and Panassik, V and Pascaud, C and Patel, GD and Peez, M and Perez, E and Phillips, JP and Pitzl, D and Poschl, R and Potachnikova, I and Povh, B and Radel, G and Rauschenberger, J and Reimer, P and Reisert, B and Reyna, D and Risler, C and Rizvi, E and Robmann, P and Roosen, R and Rostovtsev, A and Rusakov, S and Rybicki, K and Sankey, DPC and Schatzel, S and Scheins, J and Schilling, FP and Schleper, P and Schmidt, D and Schmidt, D and Schmidt, S and Schmitt, S and Schneider, M and Schoeffel, L and Schooning, A and Schorner, T and Schroder, V and Schultz-Coulon, HC and Schwanenberger, C and Sedlak, K and Sefkow, F and Shekelyan, V and Sheviakov, I and Shtarkov, LN and Sirois, Y and Sloan, T and Smirnov, P and Soloviev, Y and South, D and Spaskov, V and Specka, A and Spitzer, H and Stamen, R and Stella, B and Stiewe, J and Straumann, U and Swart, M and Tasevsky, M and Tchetchelnitski, S and Thompson, G and Thompson, PD and Tobien, N and Tomasz, F and Traynor, D and Truol, P and Tsipolitis, G and Tsurin, I and Turnau, J and Turney, JE and Tzamariudaki, E and Udluft, S and Urban, M and Usik, A and Valkar, S and Valkarova, A and Vallee, C and Van Mechelen, P and Vassiliev, S and Vazdik, Y and Vichnevski, A and Vorobiev, M and Wacker, K and Wagner, J and Wallny, R and Waugh, B and Weber, G and Weber, M and Wegener, D and Werner, C and Werner, M and Werner, N and Wessels, M and White, G and Wiesand, S and Wilksen, T and Winde, M and Winter, GG and Wissing, C and Wobisch, M and Woehrling, EE and Wunsch, E and Wyatt, AC and Zacek, J and Zalesak, J and Zhang, Z and Zhokin, A and Zomer, F and zur Nedden, M},
  issn         = {0370-2693},
  language     = {eng},
  number       = {1-2},
  pages        = {35--43},
  publisher    = {Elsevier},
  series       = {Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics},
  title        = {Search for odderon-induced contributions to exclusive pi(0) photoproduction at HERA},
  url          = {http://dx.doi.org/10.1016/S0370-2693(02)02479-6},
  volume       = {544},
  year         = {2002},
}