Evidence for exotic meson production in the reaction pi(-)p->eta pi(-)p at 18 GeV/c

被引：256

作者：

Thompson, DR

Adams, GS

Adams, T

BarYam, Z

Bishop, JM

Bodyagin, VA

Brown, DS

Cason, NM

Chung, SU

Cummings, JP

Denisov, SP

Dorofeev, VA

Dowd, JP

Eugenio, P

Hackenburg, RW

Hayek, M

Ivanov, EI

Kachaev, IA

Kern, W

King, E

Kodolova, OL

Korotkikh, VL

Kostin, MA

Kuhn, J

Lipaev, VV

LoSecco, JM

Manak, JJ

Napolitano, J

Nozar, M

Olchanski, C

Ostrovidov, AI

Pedlar, TK

Popov, AV

Ryabchikov, DI

Sanjari, AH

Sarycheva, LI

Seth, KK

Shephard, WD

Sinev, NB

Smith, JA

Stienike, DL

Strassburger, C

Taegar, SA

Vardanyan, IN

Weygand, DP

White, DB

Willutzki, HJ

Wise, J

Witkowski, M

Yershov, AA

机构：

[1] BROOKHAVEN NATL LAB,LONG ISL CITY,NY 11973

[2] INST HIGH ENERGY PHYS,PROTVINO,RUSSIA

[3] UNIV MASSACHUSETTS,N DARTMOUTH,MA 02747

[4] MOSCOW MV LOMONOSOV STATE UNIV,MOSCOW,RUSSIA

[5] NORTHWESTERN UNIV,EVANSTON,IL 60208

[6] RENSSELAER POLYTECH INST,TROY,NY 12180

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.79.1630

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The eta pi(-) system has been studied in the reaction eta(-)p-->eta pi(-)P at 18 GeV/c. A large asymmetry in the angular distribution is observed indicating interference between L-even and L-odd partial waves. The a(2)(1320) is observed in the J(PC) = 2(++). wave, as is a broad enhancement between 1.2 and 1.6 GeV/c(2) in the 1(-+) wave. The observed phase difference between these waves shows that there is phase motion in addition to that due to a(2)(1320) decay. The data can be fitted by interference between the a(2)(1320) and an exotic 1(-+) resonance with M = (1370 +/- 16(-30)(+50)) MeV/c(2) and Gamma = (385 +/- 40(-105)(+65))MeV/c(2).

引用

页码：1630 / 1633

页数：4

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