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First Measurement of Chiral Dynamics in π^{-}γ→π^{-}π^{-}π^{+}
Authors :
Adolph, C. Alekseev, M. G. Alexakhin, V. Y. Alexandrov, Y. Alexeev, G. D. Amoroso, Antonio Antonov, A. A. Austregesilo, A. Badelek, B. Balestra, Ferruccio Barth, J. Baum, G. Bedfer, Y. Bernhard, J. Bertini, Raimondo Pietro Bettinelli, M. Bicker, K. A. Birsa, R. Bisplinghoff, J. Bordalo, P. Bradamante, F. Braun, C. Bravar, A. Bressan, A. Burtin, E. Chaberny, D. Chiosso, Michela Chung, S. U. Cicuttin, A. Crespo, M. L. Torre, S. D. Das, S. Dasgupta, S. S. Denisov, O. Y. Dhara, L. Donskov, S. V. Doshita, N. Duic, V. Duennweber, W. Dziewiecki, M. Efremov, A. Elia, C. Eversheim, P. D. Eyrich, W. Faessler, M. Ferrero, A. Filin, A. Finger, M. J. F. M. Fischer, H. Franco, C. Fresne, N. d. Friedrich, J. M. Garfagnini, Raffaello Gautheron, F. Gavrichtchouk, O. P. Gazda, R. Gerassimov, S. Geyer, R. Giorgi, M. Gnesi, Ivan Gobbo, B. Goertz, S. Grabmueller, S. Grasso, Antonino Grube, B. Gushterski, R. Guskov, A. Haas, F. Harrach, D. v. Hasegawa, T. Heinsius, F. H. Herrmann, F. Hess, C. Hinterberger, F. Horikawa, N. Hoeppner, C. D'Hose, N. Huber, S. Ishimoto, S. Ivanov, O. Ivanshin, Y. Iwata, T. Jahn, R. Jasinski, P. Jegou, G. Joosten, R. Kabuss, E. Kang, D. Ketzer, B. Khaustov, G. V. Khokhlov, Y. A. Kisselev, Y. Klein, F. Klimaszewski, K. Koblitz, S. Koivuniemi, J. H. Kolosov, V. N. Kondo, K. Koenigsmann, K. Konorov, I. Konstantinov, V. F. Korzenev, A. Kotzinian, A. M. Kouznetsov, O. Kraemer, M. Kroumchtein, Z. V. Kunne, F. Kurek, K. Lauser, L. Lednev, A. A. Lehmann, A. Levorato, S. Lichtenstadt, J. Maggiora, A. Magnon, A. Makke, N. Mallot, G. K. Mann, A. Marchand, C. Martin, A. Marzec, J. Massmann, F. Matsuda, T. Meyer, W. Michigami, T. Mikhailov, Y. V. Moinester, M. A. Morreale, A. Mutter, A. Nagaytsev, A. Nagel, T. Nerling, F. Neubert, S. Neyret, D. Nikolaenko, V. I. W. . . D. Nunes, A. S. Olshevsky, A. G. Ostrick, M. Padee, A. Panknin, R. Panzieri, Daniele Parsamyan, B. Paul, S. Perevalova, E. Pesaro, G. Peshekhonov, D. V. Piragino, Guido Platchkov, S. Pochodzalla, J. Polak, J. Polyakov, V. A. Pontecorvo, G. Pretz, J. Quintans, C. J. . . F. Ramos, S. Rapatsky, V. Reicherz, G. Richter, A. Rocco, E. Rondio, E. Rossiyskaya, N. S. Ryabchikov, D. I. Samoylenko, V. D. Sandacz, A. Sapozhnikov, M. G. Sarkar, S. Savin, I. A. Sbrizzai, G. Schiavon, P. Schill, C. Schlueter, T. Schmitt, L. Schoenning, K. Schopferer, S. Schroeder, W. Shevchenko, O. Y. H. . . W. Silva, L. Sinha, L. Sissakian, A. N. Slunecka, M. Smirnov, G. I. Sosio, Stefano Sozzi, F. Srnka, A. Stolarski, M. Sulc, M. Sulej, R. Sznajder, P. Takekawa, Stefano Wolbeek, J. T. Tessaro, S. Tessarotto, F. Teufel, A. Tkatchev, L. G. Uhl, S. Uman, I. Vandenbroucke, M. Virius, M. Vlassov, N. V. Windmolders, R. Wislicki, W. Wollny, H. Zaremba, K. Zavertyaev, M. Zemlyanichkina, E. Ziembicki, M. Zhuravlev, N. Zvyagin, A. C., Adolph M., Alekseev V., Alexakhin Alexandrov, Y. u. G., Alexeev A., Amoroso A., Antonov A., Austregesilo B., Badełek F., Balestra J., Barth G., Baum Y., Bedfer J., Bernhard R., Bertini M., Bettinelli K., Bicker Birsa, Renato J., Bisplinghoff P., Bordalo Bradamante, Franco C., Braun A., Bravar Bressan, Andrea E., Burtin D., Chaberny M., Chiosso S., Chung A., Cicuttin M., Crespo DALLA TORRE, Silvia S., Da S., Dasgupta O., Denisov L., Dhara S., Donskov N., Doshita Duic, Venicio W., Dünnweber M., Dziewiecki A., Efremov Elia, Carmine P., Eversheim W., Eyrich M., Faessler A., Ferrero A., Filin M., Finger H., Fischer C., Franco N., du Fresne von Hohenesche J., Friedrich R., Garfagnini F., Gautheron O., Gavrichtchouk R., Gazda S., Gerassimov R., Geyer Giorgi, Marcello I., Gnesi B., Gobbo S., Goertz S., Grabmüller A., Grasso B., Grube R., Gushterski A., Guskov F., Haa D., von Harrach T., Hasegawa F., Heinsiu F., Herrmann C., He F., Hinterberger N., Horikawa Höppner, C. h. N., D’Hose S., Huber S., Ishimoto O., Ivanov Ivanshin, Y. u. T., Iwata R., Jahn P., Jasinski G., Jegou R., Joosten E., Kabu D., Kang B., Ketzer G., Khaustov Khokhlov, Y. u. Kisselev, Y. u. F., Klein K., Klimaszewski S., Koblitz J., Koivuniemi V., Kolosov K., Kondo K., Königsmann I., Konorov V., Konstantinov A., Korzenev A., Kotzinian O., Kouznetsov M., Krämer Z., Kroumchtein F., Kunne K., Kurek L., Lauser A., Lednev A., Lehmann Levorato, Stefano J., Lichtenstadt A., Maggiora A., Magnon Makke, Nour G., Mallot A., Mann C., Marchand Martin, Anna J., Marzec F., Massmann T., Matsuda W., Meyer T., Michigami Mikhailov, Y. u. M., Moinester A., Morreale A., Mutter A., Nagaytsev T., Nagel F., Nerling S., Neubert D., Neyret V., Nikolaenko W. D., Nowak A., Nune A., Olshevsky M., Ostrick A., Padee R., Panknin D., Panzieri B., Parsamyan S., Paul E., Perevalova Pesaro, Giulia D., Peshekhonov G., Piragino S., Platchkov J., Pochodzalla J., Polak V., Polyakov G., Pontecorvo J., Pretz C., Quintan J. F., Rajotte S., Ramo V., Rapatsky G., Reicherz A., Richter Rocco, Elena E., Rondio N., Rossiyskaya D., Ryabchikov V., Samoylenko A., Sandacz M., Sapozhnikov S., Sarkar I., Savin Sbrizzai, Giulio Schiavon, Paolo C., Schill T., Schlüter L., Schmitt K., Schönning S., Schopferer W., Schröder O., Shevchenko H. W., Siebert L., Silva L., Sinha A., Sissakian M., Slunecka G., Smirnov S., Sosio Sozzi, Federica A., Srnka M., Stolarski M., Sulc R., Sulej P., Sznajder S., Takekawa J., Ter Wolbeek Tessaro, Susanna F., Tessarotto A., Teufel L., Tkatchev S., Uhl I., Uman M., Vandenbroucke M., Viriu N., Vlassov R., Windmolder W., Wiślicki H., Wollny K., Zaremba M., Zavertyaev E., Zemlyanichkina M., Ziembicki N., Zhuravlev A., Zvyagin
Publication Year :
2012
Abstract
The COMPASS Collaboration at CERN has investigated the π- γ → π- π- π+ reaction at center-of-momentum energy below five pion masses, sqrt[s]5m(π), embedded in the Primakoff reaction of 190 GeV pions impinging on a lead target. Exchange of quasireal photons is selected by isolating the sharp Coulomb peak observed at smallest momentum transfers, t'0.001 GeV2/c2. Using partial-wave analysis techniques, the scattering intensity of Coulomb production described in terms of chiral dynamics and its dependence on the 3π-invariant mass m(3π)=sqrt[s] were extracted. The absolute cross section was determined in seven bins of sqrt[s] with an overall precision of 20%. At leading order, the result is found to be in good agreement with the prediction of chiral perturbation theory over the whole energy range investigated.
Details
Language :
English
Database :
OpenAIRE
Accession number :
edsair.pmid.dedup....801cfb12801de900f1294ec3316b2f3a