Observation of a NewJPC=1−+Exotic State in the Reactionπ−p→π+π−π−pat18GeV/c
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ID: 269535
1998
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Abstract
A partial-wave analysis of the reaction π−p→π+π−π−p at 18GeV/c has been performed on a data sample of 250 000 events obtained by Brookhaven experiment E852. The expected JPC=1++a1(1260), 2++a2(1320), and 2−+π2(1670) resonant states are clearly observed. The exotic JPC=1−+ wave produced in the natural parity exchange processes shows distinct resonancelike phase motion at about 1.6GeV/c2 in the ρπ channel. A mass-dependent fit results in a resonance mass of 1593±8−47+29MeV/c2 and a width of 168±20−12+150MeV/c2.
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| Authors | G. S. Adams,Todd Adams,Z. Bar-Yam,J. M. Bishop,V. A. Bodyagin,B. B. Brabson,D. S. Brown,N. M. Cason,S. U. Chung,R. R. Crittenden,J. P. Cummings,K. Danyo,S. Denisov,V. Dorofeev,J. P. Dowd,A. R. Dzierba,P. Eugenio,J. Gunter,R. W. Hackenburg,M. Hayek,É. I. Ivanov,I. Kachaev,W. Kern,E. King,O. L. Kodolova,V. L. Korotkikh,M. A. Kostin,J. Kühn,R. Lindenbusch,V. Lipaev,J. M. LoSecco,J. J. Manak,J. Napolitano,M. Nozar,C. Olchanski,A. I. Ostrovidov,T. K. Pedlar,A. Popov,D. R. Rust,D. Ryabchikov,A. H. Sanjari,L. I. Sarycheva,E. Scott,K. K. Seth,N. Shenhav,W. D. Shephard,N. B. Sinev,J. A. Smith,P. T. Smith,D. L. Stienike,T. Sulanke,S. A. Taegar,S. Teige,D. R. Thompson,I. N. Vardanyan,D. P. Weygand,D. White,H. J. Willutzki,J. Wise,M. Witkowski,A. A. Yershov,D. Zhao;G. S. Adams;Todd Adams;Z. Bar-Yam;J. M. Bishop;V. A. Bodyagin;B. B. Brabson;D. S. Brown;N. M. Cason;S. U. Chung;R. R. Crittenden;J. P. Cummings;K. Danyo;S. Denisov;V. Dorofeev;J. P. Dowd;A. R. Dzierba;P. Eugenio;J. Gunter;R. W. Hackenburg;M. Hayek;É. I. Ivanov;I. Kachaev;W. Kern;E. King;O. L. Kodolova;V. L. Korotkikh;M. A. Kostin;J. Kühn;R. Lindenbusch;V. Lipaev;J. M. LoSecco;J. J. Manak;J. Napolitano;M. Nozar;C. Olchanski;A. I. Ostrovidov;T. K. Pedlar;A. Popov;D. R. Rust;D. Ryabchikov;A. H. Sanjari;L. I. Sarycheva;E. Scott;K. K. Seth;N. Shenhav;W. D. Shephard;N. B. Sinev;J. A. Smith;P. T. Smith;D. L. Stienike;T. Sulanke;S. A. Taegar;S. Teige;D. R. Thompson;I. N. Vardanyan;D. P. Weygand;D. White;H. J. Willutzki;J. Wise;M. Witkowski;A. A. Yershov;D. Zhao; |
| Journal | physical review letters |
| Year | 1998 |
| DOI |
10.1103/physrevlett.81.5760
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| URL | |
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