Медицинская библиотека · Physical review letters · 2010
Observation of a J(PC)=1-+ exotic resonance in diffractive dissociation of 190 GeV/c π- into π- π- π+.
Alekseev M G, Alexakhin V Yu, Alexandrov Yu, Alexeev G D, Amoroso A, Austregesilo A, Badełek 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 Yu, Dhara L, Diaz V, Dinkelbach A M, Donskov S V, Doshita N, Duic V, Dünnweber W, Efremov A, El Alaoui 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, Grabmüller 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, Höppner 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, Königsmann K, Konopka R, Konorov I, Konstantinov V F, Korzenev A, Kotzinian A M, Kouznetsov O, Kowalik K, Krämer 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, Maximov A N, Meyer W, Michigami T, Mikhailov Yu V, Moinester M A, Mutter A, Nagaytsev A, Nagel T, Nassalski J, Negrini T, 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, Sbrizzai G, Schiavon P, Schill C, Schlüter T, Schmitt L, Schopferer S, Schröder 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, Uhl S, Uman I, Venugopal G, Virius M, Vlassov N V, Vossen A, Weitzel Q, Windmolders R, Wiślicki W, Wollny H, Zaremba K, Zavertyaev M, Zemlyanichkina E, Ziembicki M, Zhao J, Zhuravlev N, Zvyagin A, COMPASS Collaboration
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Аннотация
The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the π- π- π+ final state using a 190 GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420,000 events taken at values of the squared 4-momentum transfer t' between 0.1 and 1 GeV2/c2. The well-known resonances a1(1260), a2(1320), and π2(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/c2 decaying to ρπ. 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(-64)(+0)) MeV/c2 and a width of (269±21(-64)(+42)) MeV/c2 are deduced, with an intensity of (1.7±0.2)% of the total intensity.
Для цитирования: Alekseev M G, Alexakhin V Yu, Alexandrov Yu, Alexeev G D, Amoroso A, Austregesilo A, Badełek 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 Yu, Dhara L, Diaz V, Dinkelbach A M, Donskov S V, Doshita N, Duic V, Dünnweber W, Efremov A, El Alaoui 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, Grabmüller 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, Höppner 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, Königsmann K, Konopka R, Konorov I, Konstantinov V F, Korzenev A, Kotzinian A M, Kouznetsov O, Kowalik K, Krämer 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, Maximov A N, Meyer W, Michigami T, Mikhailov Yu V, Moinester M A, Mutter A, Nagaytsev A, Nagel T, Nassalski J, Negrini T, 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, Sbrizzai G, Schiavon P, Schill C, Schlüter T, Schmitt L, Schopferer S, Schröder 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, Uhl S, Uman I, Venugopal G, Virius M, Vlassov N V, Vossen A, Weitzel Q, Windmolders R, Wiślicki W, Wollny H, Zaremba K, Zavertyaev M, Zemlyanichkina E, Ziembicki M, Zhao J, Zhuravlev N, Zvyagin A, COMPASS Collaboration. Observation of a J(PC)=1-+ exotic resonance in diffractive dissociation of 190 GeV/c π- into π- π- π+.. Physical review letters. 2010. DOI: 10.1103/physrevlett.104.241803.
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