Study of $f_{0}$ decays into four neutral pions

The CRYSTAL BARREL Collaboration A. Abele; J. Adomeit; C. Amsler; C.A. Baker; B.M. Barnett; C.J. Batty; M. Benayoun; S. Bischoff; P. Blüm; K. Braune; T. Case; V. Credé; K.M. Crowe; T. Degener; M. Doser; W. Dünnweber; D. Engelhardt; M.A. Faessler; P. Giarritta; R.P. Haddock; F.H. Heinsius; M. Heinzelmann; A. Herbstrith; N.P. Hessey; P. Hidas; C. Holtzhaußen; D. Jamnik; H. Kalinowsky; P. Kammel; J. Kisiel; E. Klempt; H. Koch; M. Kunze; U. Kurilla; M. Lakata; R. Landua; H. Matthäy; C.A. Meyer; F. Meyer-Wildhagen; L. Montanet; R. Ouared; K. Peters; B. Pick; M. Ratajczak; C. Regenfus; W. Roethel; S. Spanier; H. Stöck; U. Strohbusch; M. Suffert; J.S. Suh; U. Thoma; M. Tischhäuser; I. Uman; S. Wallis-Plachner; D. Walther; U. Wiedner; K. Wittmack

doi:doi:10.1007/s100520100601

EPJ

a
b
c
d
e
ap
st
h
plus
ds
pv
ti
qt
am
n

2023 Impact factor 4.2

Particles and Fields

Eur. Phys. J. C 19, 667-675
DOI: 10.1007/s100520100601

Study of f₀ decays into four neutral pions

The CRYSTAL BARREL Collaboration
A. Abele¹, J. Adomeit², C. Amsler³, C.A. Baker⁴, B.M. Barnett⁵, C.J. Batty⁴, M. Benayoun⁶, S. Bischoff¹, P. Blüm¹, K. Braune⁷, T. Case⁸, V. Credé⁵, K.M. Crowe⁸, T. Degener⁹, M. Doser¹⁰, W. Dünnweber⁷, D. Engelhardt¹, M.A. Faessler⁷, P. Giarritta³, R.P. Haddock¹¹, F.H. Heinsius⁸, M. Heinzelmann³, A. Herbstrith¹, N.P. Hessey⁷, P. Hidas¹², C. Holtzhaußen¹, D. Jamnik⁷, H. Kalinowsky⁵, P. Kammel⁸, J. Kisiel¹⁰, E. Klempt⁵, H. Koch⁹, M. Kunze⁹, U. Kurilla⁹, M. Lakata⁸, R. Landua¹⁰, H. Matthäy⁹, C.A. Meyer¹³, F. Meyer-Wildhagen⁷, L. Montanet¹⁰, R. Ouared¹⁰, K. Peters⁹, B. Pick⁵, M. Ratajczak⁹, C. Regenfus³, W. Roethel⁷, S. Spanier³, H. Stöck⁹, U. Strohbusch², M. Suffert¹⁴, J.S. Suh⁵, U. Thoma⁵, M. Tischhäuser¹, I. Uman⁷, S. Wallis-Plachner⁷, D. Walther⁷, U. Wiedner⁷ and K. Wittmack⁵

¹ Universität Karlsruhe, 76021 Karlsruhe, Germany
² Universität Hamburg, 22761 Hamburg, Germany
³ Universität Zürich, 8057 Zürich,Switzerland
⁴ Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK
⁵ Universität Bonn, 53115 Bonn, Germany
⁶ LPNHE Paris VI, VII, 75252 Paris, France
⁷ Universität München, 80333 München, Germany
⁸ University of California, LBNL, Berkeley, CA 94720, USA
⁹ Universität Bochum, 44780 Bochum, Germany
¹⁰ CERN, 1211 Geneva 4, Switzerland
¹¹ University of California, Los Angeles, CA 90024, USA
¹² Academy of Science, 1525 Budapest, Hungary
¹³ Carnegie Mellon University, Pittsburgh, PA 15213, USA
¹⁴ Centre de Recherches Nucléaires, 67037 Strasbourg, France

(Received: 13 September 2000 / Revised version: 4 January 2001 / Published online: 6 April 2001 -© Springer-Verlag 2001)

Abstract
A simultaneous analysis of two different $5\pi$ final states from $\bar{p}N$ annihilation at rest is used to study the decays of isoscalar 0⁺⁺ states into $4\pi^{0}$ . The data demand two scalar states, the f₀(1370) with m=1395 $\pm$ 40 MeV/c², $\Gamma$ =275 $\pm$ 55 MeV/c² and the f₀(1500) with mass and width compatible with previous findings. Apart from the dominant scalar intensity, the $\pi$ (1300) plays an important role in the 5 $\pi$ dynamics. We find a mass of m=1375 $\pm$ 40 MeV/c² and a width of $\Gamma$ =268 $\pm$ 50 MeV/c² with a dominant decay into $\rho\pi$ . The $(\pi\pi)_{s}\pi$ decay of the $\pi(1300)$ is less than $15\%$ of its $\rho\pi$ decay.