Radiative decay width of the a2(1320)− meson

V. V. Molchanov,G. Alkhazov,A. G. Atamantchouk,M. Y. Balatz,N. Bondar,D. Casey,Peter S. Cooper,L. J. Dauwe,G. V. Davidenko,U. Dersch,A. G. Dolgolenko,G.B. Dzyubenko,R. Edelstein,L. Emediato,A. M. F. Endler,J. Engelfried,I. Eschrich,C.O. Escobar,A.V. Evdokimov,T. Ferbel,I. S. Filimonov,F. G. Garcia,M. Gaspero,I. Giller,V. L. Golovtsov,P. Gouffon,C Hammer,Kangling He,M. Iori,Sy Jun,M. Kaya,J. Kilmer,V. Kim,L.M. Kochenda,I. Konorov,A. P. Kozhevnikov,A. G. Krivshich,H. Kr,M.A. Kubantsev,V. P. Kubarovsky,A. I. Kulyavtsev,N. P. Kuropatkin,V. F. Kurshetsov,A. Kushnirenko,S. Kwan,J. Lach,A. Lamberto,L.G. Landsberg,I. Larin,E. M. Leikin,Yunshan Li,M. Luksys,T. Lungov,V. P. Maleev,D. Mao,Chensheng Mao,Zhenlin Mao,P. Mathew,M. Mattson,V. Matveev,E. McCliment,M. A. Moinester,Antonio Morelos,V. A. Mukhin,K. D. Nelson,A. V. Nemitkin,P. V. Neoustroev,C. R. Newsom,A. P. Nilov,S. B. Nurushev,A. Ocherashvili,Y. Onel,E. Ozel,S. Ozkorucuklu,A. Penzo,S. V. Petrenko,P. Pogodin,M. Procario,V. A. Prutskoi,Erik J. Ramberg,G. F. Rappazzo,B. V. Razmyslovich,V. I. Ruď,J. Russ,P. Schiavon,J. Simon,A. I. Sitnikov,D. Skow,P. Slattery,Vincent J Smith,M. Srivastava,V. Steiner,V. Stepanov,L. Stutte,M. Svoiski,N. Terentyev,G. P. Thomas,L. N. Uvarov,A. N. Vasiliev,D. V. Vavilov,V.S. Verebryusov,V. A. Victorov,V.E. Vishnyakov,A. A. Vorobyov,K. Vorwalter,J. You,Wenheng Zhao,Shuchen Zheng,Z. H. Zhu,M. Zielinski,R. Zukanovich

Radiative decay width of the a2(1320)− meson

2001

V. V. Molchanov
G. Alkhazov
A. G. Atamantchouk
M. Y. Balatz
N. Bondar
D. Casey
Peter S. Cooper
L. J. Dauwe
G. V. Davidenko
U. Dersch
A. G. Dolgolenko
G.B. Dzyubenko
R. Edelstein
L. Emediato
A. M. F. Endler
J. Engelfried
I. Eschrich
C.O. Escobar
A.V. Evdokimov
T. Ferbel
I. S. Filimonov
F. G. Garcia
M. Gaspero
I. Giller
V. L. Golovtsov
P. Gouffon
C Hammer
Kangling He
M. Iori
Sy Jun
M. Kaya
J. Kilmer
V. Kim
L.M. Kochenda
I. Konorov
A. P. Kozhevnikov
A. G. Krivshich
H. Kr
M.A. Kubantsev
V. P. Kubarovsky
A. I. Kulyavtsev
N. P. Kuropatkin
V. F. Kurshetsov
A. Kushnirenko
S. Kwan
J. Lach
A. Lamberto
L.G. Landsberg
I. Larin
E. M. Leikin
Yunshan Li
M. Luksys
T. Lungov
V. P. Maleev
D. Mao
Chensheng Mao
Zhenlin Mao
P. Mathew
M. Mattson
V. Matveev
E. McCliment
M. A. Moinester
Antonio Morelos
V. A. Mukhin
K. D. Nelson
A. V. Nemitkin
P. V. Neoustroev
C. R. Newsom
A. P. Nilov
S. B. Nurushev
A. Ocherashvili
Y. Onel
E. Ozel
S. Ozkorucuklu
A. Penzo
S. V. Petrenko
P. Pogodin
M. Procario
V. A. Prutskoi
Erik J. Ramberg
G. F. Rappazzo
B. V. Razmyslovich
V. I. Ruď
J. Russ
P. Schiavon
J. Simon
A. I. Sitnikov
D. Skow
P. Slattery
Vincent J Smith
M. Srivastava
V. Steiner
V. Stepanov
L. Stutte
M. Svoiski
N. Terentyev
G. P. Thomas
L. N. Uvarov
A. N. Vasiliev
D. V. Vavilov
V.S. Verebryusov
V. A. Victorov
V.E. Vishnyakov
A. A. Vorobyov
K. Vorwalter
J. You
Wenheng Zhao
Shuchen Zheng
Z. H. Zhu
M. Zielinski
R. Zukanovich

Abstract Coherent π + π − π − production in the interactions of a beam of 600 GeV π − mesons with C, Cu and Pb nuclei has been studied with the SELEX facility (Experiment E781 at Fermilab). The a 2 (1320) meson signal has been detected in the Coulomb (low q 2 ) region. The Primakoff formalism used to extract radiative decay width of this meson yields Γ=284±25±25 keV , which is the most precise measurement to date.

Keywords:

Fermilab
Coulomb
Nuclear physics
Particle physics
Quantum electrodynamics
Meson
Radiative transfer
Physics
Primakoff effect
radiative decay
Beam (structure)

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