Observation of a J**PC = 1-+ exotic resonance in diffractive dissociation of 190-GeV/c pi- into pi- pi- pi+

Alekseev M, Alexakhin VY, Alexandrov Y, Alexeev GD, Amoroso A, Austregisilio A, Badelek B, Balestra F, Ball J, Barth J, Baum G, et al. (2010)
Phys.Rev.Lett. 104(24).

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Abstract
The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the pi- pi- pi+ final state using a 190 GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420000 events taken at values of the squared 4-momentum transfer t' between 0.1 and 1 GeV^2/c^2. The well-known resonances a1(1260), a2(1320), and pi2(1670) are clearly observed. In addition, the data show a significant natural parity exchange production of a resonance with spin-exotic quantum numbers J^PC = 1-+ at 1.66 GeV/c^2 decaying to rho pi. The resonant nature of this wave is evident from the mass-dependent phase differences to the J^PC = 2-+ and 1++ waves. From a mass-dependent fit a resonance mass of 1660 +- 10+0-64 MeV/c^2 and a width of 269+-21+42-64 MeV/c^2 is deduced.
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Alekseev M, Alexakhin VY, Alexandrov Y, et al. Observation of a J**PC = 1-+ exotic resonance in diffractive dissociation of 190-GeV/c pi- into pi- pi- pi+. Phys.Rev.Lett. 2010;104(24).
Alekseev, M., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Austregisilio, A., Badelek, B., et al. (2010). Observation of a J**PC = 1-+ exotic resonance in diffractive dissociation of 190-GeV/c pi- into pi- pi- pi+. Phys.Rev.Lett., 104(24).
Alekseev, M., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Austregisilio, A., Badelek, B., Balestra, F., Ball, J., Barth, J., et al. (2010). Observation of a J**PC = 1-+ exotic resonance in diffractive dissociation of 190-GeV/c pi- into pi- pi- pi+. Phys.Rev.Lett. 104.
Alekseev, M., et al., 2010. Observation of a J**PC = 1-+ exotic resonance in diffractive dissociation of 190-GeV/c pi- into pi- pi- pi+. Phys.Rev.Lett., 104(24).
M. Alekseev, et al., “Observation of a J**PC = 1-+ exotic resonance in diffractive dissociation of 190-GeV/c pi- into pi- pi- pi+”, Phys.Rev.Lett., vol. 104, 2010.
Alekseev, M., Alexakhin, V.Y., Alexandrov, Y., Alexeev, G.D., Amoroso, A., Austregisilio, A., Badelek, B., Balestra, F., Ball, J., Barth, J., Baum, G., Bedfer, Y., Bernhard, J., Bertini, R., Bettinelli, M., Birsa, R., Bisplinghoff, J., Bordalo, P., Bradamante, F., Bravar, A.,, Bressan, A.,, Brona, G.,, Burtin, E.,, Bussa, M.P.,, Chapiro, A.,, Chiosso, M.,, Chung, S.U.,, Cicuttin, A.,, Colantoni, M.,, Crespo, M.L.,, Dalla Torre, S.,, Dafni, T.,, Das, S.,, Dasgupta, S.S.,, Denisov, O.Y.,, Dhara, L.,, Diaz, V.,, Dinkelbach, A.M.,, Donskov, S.V.,, Doshita, N.,, Duic, V.,, Dunnweber, W.,, Efremov, A.,, Eversheim, P.D.,, Eyrich, W.,, Faessler, M.,, Ferrero, A.,, Finger, M.,, Finger, M.,, Fischer, H.,, Franco, C.,, Friedrich, J.M.,, Garfagnini, R.,, Gautheron, F.,, Gavrichtchouk, O.P.,, Gazda, R.,, Gerassimov, S.,, Geyer, R.,, Giorgi, M.,, Gobbo, B.,, Goertz, S.,, Grabmuller, S.,, Grajek, O.A.,, Grasso, A.,, Grube, B.,, Gushterski, R.,, Guskov, A.,, Haas, F.,, von Harrach, D.,, Hasegawa, T.,, Heckmann, J.,, Heinsius, F.H.,, Hermann, R.,, Herrmann, F.,, Hess, C.,, Hinterberger, F.,, Horikawa, N.,, Hoppner, C.,, d'Hose, N.,, Ilgner, C.,, 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.,, Komissarov, E.V.,, Kondo, K.,, Konigsmann, K.,, Konopka, R.,, Konorov, I.,, Konstantinov, V.F.,, Korzenev, A.,, Kotzinian, A.M.,, Kouznetsov, O.,, Kowalik, K.,, Kramer, M.,, Kral, A.,, Kroumchtein, Z.V.,, Kuhn, R.,, Kunne, F.,, Kurek, K.,, Lauser, L.,, Le Goff, J.M.,, Lednev, A.A.,, Lehmann, A.,, Levorato, S.,, Lichtenstadt, J.,, Liska, T.,, Maggiora, A.,, Maggiora, M.,, Magnon, A.,, Mallot, G.K.,, Mann, A.,, Marchand, C.,, Marroncle, J.,, Martin, A.,, Marzec, J.,, Massmann, F.,, Matsuda, T.,, Meyer, W.,, Michigami, T.,, Mikhailov, Y.V.,, Moinester, M.A.,, Mutter, A.,, Nagaytsev, A.,, Nagel, T.,, Nassalski, J.,, Negrini, S.,, Nerling, F.,, Neubert, S.,, Neyret, D.,, Nikolaenko, V.I.,, Olshevsky, A.G.,, Ostrick, M.,, Padee, A.,, Panknin, R.,, Panzieri, D.,, Parsamyan, B.,, Paul, S.,, Pawlukiewicz-Kaminska, B.,, Perevalova, E.,, Pesaro, G.,, Peshekhonov, D.V.,, Piragino, G.,, Platchkov, S.,, Pochodzalla, J.,, Polak, J.,, Polyakov, V.A.,, Pontecorvo, G.,, Pretz, J.,, Quintans, C.,, Rajotte, J.-F.,, Ramos, S.,, Rapatsky, V.,, Reicherz, G.,, Reggiani, D.,, Richter, A.,, Robinet, F.,, Rocco, E.,, Rondio, E.,, Ryabchikov, D.I.,, Samoylenko, V.D.,, Sandacz, A.,, Santos, H.,, Sapozhnikov, M.G.,, Sarkar, S.,, Savin, I.A.,, Sbrizza, G.,, Schiavon, P.,, Schill, C.,, Schmitt, L.,, Schopferer, S.,, Schroder, W.,, Shevchenko, O.Y.,, Siebert, H.-W.,, Silva, L.,, Sinha, L.,, Sissakian, A.N.,, Slunecka, M.,, Smirnov, G.I.,, Sosio, S.,, Sozzi, F.,, Srnka, A.,, Stolarski, M.,, Sulc, M.,, Sulej, R.,, Takekawa, S.,, Tessaro, S.,, Tessarotto, F.,, Teufel, A.,, Tkatchev, L.G.,, Uman, I.,, Venugopal, G.,, Virius, M.,, Vlassov, N.V.,, Vossen, A.,, Weitzel, Q.,, Windmolders, R.,, Wislicki, W.,, Wollny, H.,, Zaremba, K.,, Zavertyaev, M.,, Zemlyanichkina, E.,, Ziembicki, M.,, Zhao, J.,, Zhuravlev, N.,, Zvyagin, A.,, Zvyagin, A.,: Observation of a J**PC = 1-+ exotic resonance in diffractive dissociation of 190-GeV/c pi- into pi- pi- pi+. Phys.Rev.Lett. 104, (2010).
Alekseev, M., Alexakhin, V. Yu, Alexandrov, Yu, Alexeev, G. D, Amoroso, A., Austregisilio, A., Badelek, B., Balestra, F., Ball, J., Barth, J., Baum, Günter, Bedfer, Y., Bernhard, J., Bertini, R., Bettinelli, M., Birsa, R., Bisplinghoff, J., Bordalo, P., Bradamante, F., Bravar, A.,, Bressan, A.,, Brona, G.,, Burtin, E.,, Bussa, M. P,, Chapiro, A.,, Chiosso, M.,, Chung, S. U,, Cicuttin, A.,, Colantoni, M.,, Crespo, M. L,, Dalla Torre, S.,, Dafni, T.,, Das, S.,, Dasgupta, S. S,, Denisov, O. Yu,, Dhara, L.,, Diaz, V.,, Dinkelbach, A. M,, Donskov, S. V,, Doshita, N.,, Duic, V.,, Dunnweber, W.,, Efremov, A.,, Eversheim, P. D,, Eyrich, W.,, Faessler, M.,, Ferrero, A.,, Finger, M.,, Finger, M.,, Fischer, H.,, Franco, C.,, Friedrich, J. M,, Garfagnini, R.,, Gautheron, F.,, Gavrichtchouk, O. P,, Gazda, R.,, Gerassimov, S.,, Geyer, R.,, Giorgi, M.,, Gobbo, B.,, Goertz, S.,, Grabmuller, S.,, Grajek, O. A,, Grasso, A.,, Grube, B.,, Gushterski, R.,, Guskov, A.,, Haas, F.,, von Harrach, D.,, Hasegawa, T.,, Heckmann, J.,, Heinsius, F. H,, Hermann, R.,, Herrmann, F.,, Hess, C.,, Hinterberger, F.,, Horikawa, N.,, Hoppner, Ch,, d'Hose, N.,, Ilgner, C.,, Ishimoto, S.,, Ivanov, O.,, Ivanshin, Yu,, Iwata, T.,, Jahn, R.,, Jasinski, P.,, Jegou, G.,, Joosten, R.,, Kabuss, E.,, Kang, D.,, Ketzer, B.,, Khaustov, G. V,, Khokhlov, Yu. A,, Kisselev, Yu,, Klein, F.,, Klimaszewski, K.,, Koblitz, S.,, Koivuniemi, J. H,, Kolosov, V. N,, Komissarov, E. V,, Kondo, K.,, Konigsmann, Kay,, Konopka, R.,, Konorov, I.,, Konstantinov, V. F,, Korzenev, A.,, Kotzinian, A. M,, Kouznetsov, O.,, Kowalik, K.,, Kramer, M.,, Kral, A.,, Kroumchtein, Z. V,, Kuhn, R.,, Kunne, F.,, Kurek, K.,, Lauser, L.,, Le Goff, J. M,, Lednev, A. A,, Lehmann, A.,, Levorato, S.,, Lichtenstadt, J.,, Liska, T.,, Maggiora, A.,, Maggiora, M.,, Magnon, A.,, Mallot, G. K,, Mann, A.,, Marchand, C.,, Marroncle, J.,, Martin, A.,, Marzec, J.,, Massmann, F.,, Matsuda, T.,, Meyer, W.,, Michigami, T.,, Mikhailov, Yu. V,, Moinester, M. A,, Mutter, A.,, Nagaytsev, A.,, Nagel, T.,, Nassalski, J.,, Negrini, S.,, Nerling, F.,, Neubert, S.,, Neyret, D.,, Nikolaenko, V. I,, Olshevsky, A. G,, Ostrick, M.,, Padee, A.,, Panknin, R.,, Panzieri, D.,, Parsamyan, B.,, Paul, S.,, Pawlukiewicz-Kaminska, B.,, Perevalova, E.,, Pesaro, G.,, Peshekhonov, D. V,, Piragino, G.,, Platchkov, S.,, Pochodzalla, J.,, Polak, J.,, Polyakov, V. A,, Pontecorvo, G.,, Pretz, J.,, Quintans, C.,, Rajotte, J. -F,, Ramos, S.,, Rapatsky, V.,, Reicherz, G.,, Reggiani, D.,, Richter, A.,, Robinet, F.,, Rocco, E.,, Rondio, E.,, Ryabchikov, D. I,, Samoylenko, V. D,, Sandacz, A.,, Santos, H.,, Sapozhnikov, M. G,, Sarkar, S.,, Savin, Igor A,, Sbrizza, G.,, Schiavon, P.,, Schill, C.,, Schmitt, L.,, Schopferer, S.,, Schroder, W.,, Shevchenko, O. Yu,, Siebert, H. -W,, Silva, L.,, Sinha, L.,, Sissakian, A. N,, Slunecka, M.,, Smirnov, G. I,, Sosio, S.,, Sozzi, F.,, Srnka, A.,, Stolarski, M.,, Sulc, M.,, Sulej, R.,, Takekawa, S.,, Tessaro, S.,, Tessarotto, F.,, Teufel, A.,, Tkatchev, L. G,, Uman, I.,, Venugopal, G.,, Virius, M.,, Vlassov, N. V,, Vossen, A.,, Weitzel, Q.,, Windmolders, R.,, Wislicki, W.,, Wollny, H.,, Zaremba, K.,, Zavertyaev, M.,, Zemlyanichkina, E.,, Ziembicki, M.,, Zhao, J.,, Zhuravlev, N.,, Zvyagin, A.,, and Zvyagin, A.,. “Observation of a J**PC = 1-+ exotic resonance in diffractive dissociation of 190-GeV/c pi- into pi- pi- pi+”. Phys.Rev.Lett. 104.24 (2010).
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