Observation of a new JPC=1-+ exotic state in the reaction π-p→π+π-π-p at 18 GeV/c

被引：223

作者：

Adams, GS ^{[1
]}

Adams, T

Bar-Yam, Z

Bishop, JM

Bodyagin, VA

Brabson, BB

Brown, DS

Cason, NM

Chung, SU

Crittenden, RR

Cummings, JP

Danyo, K

Denisov, S

Dorofeev, V

Dowd, JP

Dzierba, AR

Eugenio, P

Gunter, J

Hackenburg, RW

Hayek, M

Ivanov, EI

Kachaev, I

Kern, W

King, E

Kodolova, OL

Korotkikh, VL

Kostin, MA

Kuhn, J

Lindenbusch, R

Lipaev, V

LoSecco, JM

Manak, JJ

Napolitano, J

Nozar, M

Olchanski, C

Ostrovidov, AI

Pedlar, TK

Popov, A

Rust, DR

Ryabchikov, D

Sanjari, AH

Sarycheva, LI

Scott, E

Seth, KK

Shenhav, N

Shephard, WD

Sinev, NB

Smith, JA

Smith, PT

Stienike, DL

机构：

[1] Rensselaer Polytech Inst, Dept Phys, Troy, NY 12180 USA

[2] Brookhaven Natl Lab, Upton, NY 11973 USA

[3] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, Russia

[4] Univ Massachusetts, Dept Phys, N Dartmouth, MA 02747 USA

[5] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[6] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[7] Northwestern Univ, Dept Phys, Evanston, IL 60208 USA

[8] Protvino High Energy Phys Inst, Protvino 142284, Russia

[9] RAFAEL, IL-31021 Haifa, Israel

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.81.5760

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A partial-wave analysis of the reaction pi(-)p --> pi(+)pi(-)pi(-)p at 18 GeV/c has been performed on a data sample of 250 000 events obtained by Brookhaven experiment E852. The expected J(PC) = l(++)a(1)(1260), 2(++)a(2)(1320), and 2(-+)pi(2)(1670) resonant states are clearly observed. The exotic J(PC) = 1(-+) wave produced in the natural parity exchange processes shows distinct resonancelike phase motion at about 1.6 GeV/c(2) in the rho pi channel. A mass-dependent fit results in a resonance mass of 1593 +/- 8(-47)(+29) MeV/c(2) and a width of 168 +/- 20(-12)(+150) MeV/c(2).

引用

页码：5760 / 5763

页数：4

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