Based on a sample of 2.25×108J/ψ events taken with the BESIII detector at the BEPCII collider, we present the results of a study of the decay J/ψ→ηϕπ+π−. The Y(2175) resonance is observed in the invariant mass spectrum of ϕf0(980) with a statistical significance of greater than 10σ. The corresponding mass and width are determined to be M=2200±6(stat)±5(syst)  MeV/c2 and Γ=104±15(stat)±15(syst)  MeV, respectively, and the product branching fraction is measured to be ℬ(J/ψ→ηY(2175),Y(2175)→ϕf0(980),f0(980)→π+π−)=(1.20±0.14(stat)±0.37(syst))×10−4. The results are consistent within errors with those of previous experiments. We also measure the branching fraction of J/ψ→ϕf1(1285) with f1(1285)→ηπ+π− and set upper limits on the branching fractions for J/ψ→ϕη(1405)/ϕX(1835)/ϕX(1870) with η(1405)/X(1835)/X(1870)→ηπ+π− at the 90% confidence level.

Study of J /ψ →ηφπ+π- at BESIII

AMOROSO, Antonio;BIANCHI, Fabrizio;DESTEFANIS, MARCO GIOVANNI;DE MORI, FRANCESCA;GRECO, Michela;MAGGIORA, MARCO;MARCELLO, Simonetta;SOSIO, Stefano;SPATARO, STEFANO GIOVANNI;
2015-01-01

Abstract

Based on a sample of 2.25×108J/ψ events taken with the BESIII detector at the BEPCII collider, we present the results of a study of the decay J/ψ→ηϕπ+π−. The Y(2175) resonance is observed in the invariant mass spectrum of ϕf0(980) with a statistical significance of greater than 10σ. The corresponding mass and width are determined to be M=2200±6(stat)±5(syst)  MeV/c2 and Γ=104±15(stat)±15(syst)  MeV, respectively, and the product branching fraction is measured to be ℬ(J/ψ→ηY(2175),Y(2175)→ϕf0(980),f0(980)→π+π−)=(1.20±0.14(stat)±0.37(syst))×10−4. The results are consistent within errors with those of previous experiments. We also measure the branching fraction of J/ψ→ϕf1(1285) with f1(1285)→ηπ+π− and set upper limits on the branching fractions for J/ψ→ϕη(1405)/ϕX(1835)/ϕX(1870) with η(1405)/X(1835)/X(1870)→ηπ+π− at the 90% confidence level.
2015
91
5
052017-1
052017-11
http://harvest.aps.org/bagit/articles/10.1103/PhysRevD.91.052017/apsxml
Nuclear and High Energy Physics
Ablikim, M.; Achasov, M.N.; Ai, X.C.; Albayrak, O.; Albrecht, M.; Ambrose, D.J.; Amoroso, A.; An, F.F.; An, Q.; Bai, J.Z.; Baldini Ferroli, R.; Ban, Y...espandi
File in questo prodotto:
File Dimensione Formato  
PRD91(2015)052017 - Study of J:ψ→ηϕπ+π− at BESIII.pdf

Accesso aperto

Descrizione: Articolo
Tipo di file: PDF EDITORIALE
Dimensione 732.88 kB
Formato Adobe PDF
732.88 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1571819
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 67
  • ???jsp.display-item.citation.isi??? 70
social impact