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Measurement of the η → 3 π⁰ Dalitz plot distribution with the WASA detector at COSY

Research output: Contribution to journal › Article

Published copy (DOI)

10.1016/j.physletb.2009.03.063

Author(s)

C. Adolph
M. Angelstein
U. Bechstedt
S. Belostotski
M. Berłowski
H. Bhatt
J. Bisplinghoff
A. Bondar
B. Borasoy
M. Büscher
H. Calén
K. Chandwani
H. Clement
E. Czerwiński
R. Czyzykiewicz
G. D'Orsaneo
D. Duniec
C. Ekström
R. Engels
W. Erven
W. Eyrich
P. Fedorets
O. Felden
K. Fransson
D. Gil
F. Goldenbaum
K. Grigoryev
A. Heczko
C. Hanhart
V. Hejny
F. Hinterberger
M. Hodana
B. Höistad
A. Izotov
M. Jacewicz
M. Janusz
B. R. Jany
L. Jarczyk
T. Johansson
B. Kamys
G. Kemmerling
I. Keshelashvili
O. Khakimova
A. Khoukaz
K. Kilian
N. Kimura
S. Kistryn
J. Klaja
P. Klaja
H. Kleines
B. Klos
A. Kowalczyk
F. Kren
W. Krzemień
P. Kulessa
S. Kullander
A. Kupść
A. Kuzmin
V. Kyryanchuk
J. Majewski
H. Machner
A. Magiera
R. Maier
P. Marciniewski
W. Migdał
U. G. Meißner
M. Mikirtychiants
O. Miklukho
N. Milke
M. Mittag
P. Moskal
B. K. Nandi
A. Nawrot
R. Nißler
M. A. Odoyo
W. Oelert
H. Ohm
N. Paul
C. Pauly
Y. Petukhov
N. Piskunov
P. Pluciński
P. Podkopał
A. Povtoreyko
D. Prasuhn
A. Pricking
K. Pysz
J. Rachowski
T. Rausmann
C. F. Redmer
J. Ritman
R. J.M.Y. Ruber
Z. Rudy
R. Salmin
S. Schadmand
A. Schmidt
H. Schneider
W. Schroeder
W. Scobel
T. Sefzick
V. Serdyuk
M. Siemaszko
R. Siudak
T. Skorodko
T. Smoliński
J. Smyrski
V. Sopov
D. Spölgen
J. Stepaniak
G. Sterzenbach
H. Ströher
A. Szczurek
A. Teufel
T. Tolba
A. Trzciński
K. Ulbrich
R. Varma
P. Vlasov
W. Weglorz
A. Winnemöller
A. Wirzba
M. Wolke
A. Wrońska
P. Wüstner
A. Yamamoto
H. Yamaoka
X. Yuan
L. Yurev
J. Zabierowski
M. J. Zieliński
W. Zipper
J. Złomańczuk
K. Zwoll
I. Zychor

Department/unit(s)

Publication details

Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Date	Published - 15 Jun 2009
Issue number	1-2
Volume	677
Number of pages	6
Pages (from-to)	24-29
Original language	English

Abstract

In the first production run of the WASA experiment at COSY, the eta decay into three neutral pions was measured in proton-proton interactions at a proton beam kinetic energy of 1.4 GeV. The Dalitz plot of the three pions was studied using 1.2 × 10⁵ fully reconstructed events, and the quadratic slope parameter α was determined to be - 0.027 ± 0.008 (stat) ± 0.005 (syst). The result is consistent with previous measurements and further corroborates the importance of pion-pion final state interactions.

Research areas

η, η → 3 π, Dalitz plot

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Measurement of the η → 3 π⁰ Dalitz plot distribution with the WASA detector at COSY