A partial-wave analysis is performed for the process e+e-→K+K-π0π0 at the center-of-mass energies ranging from 2.000 to 2.644 GeV. The data samples of e+e-collisions, collected by the BESIII detector at the BEPCII collider with a total integrated luminosity of 300 pb-1, are analyzed. The total Born cross sections for the process e+e-→K+K-π0π0, as well as the Born cross sections for the subprocesses e+e-→φπ0π0, K+(1460)K-, K1+(1400)K-, K1+(1270)K-, and K∗+(892)K∗-(892), are measured versus the center-of-mass energy. The corresponding results for e+e-→K+K-π0π0 and φπ0π0 are consistent with those of BABAR with better precision. By analyzing the cross sections for the four subprocesses, K+(1460)K-, K1+(1400)K-, K1+(1270)K-, and K∗+(892)K∗-(892), a structure with mass M=(2126.5±16.8±12.4) MeV/c2 and width Γ=(106.9±32.1±28.1) MeV is observed with an overall statistical significance of 6.3σ, although with very limited significance in the subprocesses e+e-→K1+(1270)K- A nd K∗+(892)K∗-(892). The resonant parameters of the observed structure suggest it can be identified with the φ(2170), thus the results provide valuable input to the internal nature of the φ(2170).

Observation of a Resonant Structure in e+e-→K+K-π0π0

Amoroso A.;Bianchi F.;Destefanis M.;De Mori F.;Greco M.;Lavezzi L.;Maggiora M.;Marcello S.;Sosio S.;Spataro S.;
2020-01-01

Abstract

A partial-wave analysis is performed for the process e+e-→K+K-π0π0 at the center-of-mass energies ranging from 2.000 to 2.644 GeV. The data samples of e+e-collisions, collected by the BESIII detector at the BEPCII collider with a total integrated luminosity of 300 pb-1, are analyzed. The total Born cross sections for the process e+e-→K+K-π0π0, as well as the Born cross sections for the subprocesses e+e-→φπ0π0, K+(1460)K-, K1+(1400)K-, K1+(1270)K-, and K∗+(892)K∗-(892), are measured versus the center-of-mass energy. The corresponding results for e+e-→K+K-π0π0 and φπ0π0 are consistent with those of BABAR with better precision. By analyzing the cross sections for the four subprocesses, K+(1460)K-, K1+(1400)K-, K1+(1270)K-, and K∗+(892)K∗-(892), a structure with mass M=(2126.5±16.8±12.4) MeV/c2 and width Γ=(106.9±32.1±28.1) MeV is observed with an overall statistical significance of 6.3σ, although with very limited significance in the subprocesses e+e-→K1+(1270)K- A nd K∗+(892)K∗-(892). The resonant parameters of the observed structure suggest it can be identified with the φ(2170), thus the results provide valuable input to the internal nature of the φ(2170).
2020
124
11
112001-1
112001-8
Ablikim M.; Achasov M.N.; Adlarson P.; Ahmed S.; Albrecht M.; Amoroso A.; An Q.; Anita A.; Bai Y.; Bakina O.; Baldini Ferroli R.; Balossino I.; Ban Y....espandi
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.124.112001.pdf

Accesso aperto

Tipo di file: PDF EDITORIALE
Dimensione 302.31 kB
Formato Adobe PDF
302.31 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/2318/1796552
Citazioni
  • ???jsp.display-item.citation.pmc??? 3
  • Scopus 43
  • ???jsp.display-item.citation.isi??? 37
social impact