Study of the reactions e+e- →2 (π+π-)π0π0π0 and 2 (π+π-)π0π0η at center-of-mass energies from threshold to 4.5 GeV using initial-state radiation STUDY of the REACTIONS ... LEES J. P. et al.

(B a B ar Collaboration)

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Abstract

We study the processes e+e-→2(π+π-)π0π0π0γ and 2(π+π-)π0π0ηγ in which an energetic photon is radiated from the initial state. The data were collected with the BABAR detector at SLAC. About 14 000 and 4700 events, respectively, are selected from a data sample corresponding to an integrated luminosity of 469 fb-1. The invariant mass of the hadronic final state defines the effective e+e- center-of-mass energy. The center-of-mass energies range from threshold to 4.5 GeV. From the mass spectra, the first ever measurements of the e+e-→2(π+π-)π0π0π0 and the e+e-→2(π+π-)π0π0η cross sections are performed. The contributions from ωπ+π-π0π0, η2(π+π-), and other intermediate states are presented. We observe the J/ψ and ψ(2S) in most of these final states and measure the corresponding branching fractions, many of them for the first time.

Original languageEnglish
Article number092001
JournalPhysical Review D
Volume103
Issue number9
DOIs
StatePublished - 6 May 2021

Funding

FundersFunder number
A. P. Sloan Foundation
U.S.–Israel
National Science Foundation
U.S. Department of Energy
Natural Sciences and Engineering Research Council of Canada
Science and Technology Facilities Council
Marie Curie
European Commission
Deutsche Forschungsgemeinschaft
Stichting voor Fundamenteel Onderzoek der Materie
United States-Israel Binational Science Foundation
Bundesministerium für Bildung und Forschung
Ministerio de Economía y Competitividad
Ministry of Education and Science of the Russian Federation
Instituto Nazionale di Fisica Nucleare
Norges Forskningsråd
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
Institut National de Physique Nucléaire et de Physique des Particules

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