Exotic ηπ state in (p)over-bar-d annihilation at rest into π-π0η pspectator

被引：221
作者：
Abele, A [1 ]
Adomeit, J
Amsler, C
Baker, CA
Barnett, BM
Batty, CJ
Benayoun, M
Berdoz, A
Beuchert, K
Bischoff, S
Blum, P
Braune, K
Bugg, DV
Case, T
Cramer, O
Crede, V
Crowe, KM
Degener, T
Djaoshvili, N
von Dombrowski, S
Doser, M
Dunnweber, W
Ehmanns, A
Engelhardt, D
Faessler, MA
Giarritta, P
Haddock, RP
Heinsius, FH
Heinzelmann, M
Herbstrith, A
Herz, M
Hessey, NP
Hidas, P
Hodd, C
Holtzhaussen, C
Huttmann, K
Jamnik, D
Kalinowsky, H
Kammle, B
Kammel, P
Kisiel, J
Klempt, E
Koch, H
Kolo, C
Kunze, M
Kurilla, U
Lakata, M
Landua, R
Matthay, H
McCrady, R
机构：
[1] Univ Karlsruhe, D-76021 Karlsruhe, Germany
[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[3] Ruhr Univ Bochum, D-44780 Bochum, Germany
[4] Univ Bonn, D-53115 Bonn, Germany
[5] Hungarian Acad Sci, H-1525 Budapest, Hungary
[6] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[7] CERN, CH-1211 Geneva 4, Switzerland
[8] Univ Hamburg, D-22761 Hamburg, Germany
[9] Univ London Queen Mary & Westfield Coll, London E1 4NS, England
[10] Univ Calif Los Angeles, Los Angeles, CA 90024 USA
[11] Univ Munchen, D-80333 Munchen, Germany
[12] Univ Paris 06, LPNHE, F-75252 Paris, France
[13] Univ Paris 07, LPNHE, F-75252 Paris, France
[14] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[15] Ctr Rech Nucl, F-67037 Strasbourg, France
[16] Univ Zurich, CH-8057 Zurich, Switzerland
来源：
PHYSICS LETTERS B | 1998年 / 423卷 / 1-2期
基金：
匈牙利科学研究基金会;
关键词：
D O I：
10.1016/S0370-2693(98)00123-3
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
With antiprotons slopped in liquid deuterium, the <(p)over bar n> annihilation channel pi(-)pi(0) eta was studied using a final sample of 52 576 events obtained for a spectator proton momentum < 100 MeV/c. In the intensity distribution the eta pi P-wave is clearly apparent by its interferences with the dominant rho(-)(770) rind a(2)(1310) two-meson resonances. A partial wave analysis of the data yields evidence for resonant behaviour of the eta pi P-wave, which has the non-<q(q)over bar> quantum numbers I-G = 1(-), J(PC) = 1(-+). The extracted Breit-Wigner resonance parameters are m = (1400 +/- 20 +/- 20) MeV/c(2) and Gamma = (310 +/- 50(-30)(+50)) MeV/c(2). (C) 1998 Published by Elsevier Science B.V.
引用
收藏
页码：175 / 184
页数：10
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