With a sample of (225.2 +/- 2.8) x 10(6) J/psi events registered in the BESIII detector, J/psi -> gamma pi(+)pi(-)eta' is studied using two eta' decay modes: eta' -> pi(+)pi(-)eta and eta' -> gamma rho(0). The X(1835), which was previously observed by BESII, is confirmed with a statistical significance that is larger than 20 sigma. In addition, in the pi(+)pi(-)eta' invariant-mass spectrum, the X(2120) and the X(2370), are observed with statistical significances larger than 7.2 sigma and 6.4 sigma, respectively. For the X(1835), the angular distribution of the radiative photon is consistent with expectations for a pseudoscalar.

Confirmation of the X(1835) and Observation of the Resonances X(2120) and X(2370) in J/ψ→γπ+π-η′

DESTEFANIS, MARCO GIOVANNI;GRECO, Michela;MAGGIORA, MARCO;SPATARO, STEFANO GIOVANNI;
2011-01-01

Abstract

With a sample of (225.2 +/- 2.8) x 10(6) J/psi events registered in the BESIII detector, J/psi -> gamma pi(+)pi(-)eta' is studied using two eta' decay modes: eta' -> pi(+)pi(-)eta and eta' -> gamma rho(0). The X(1835), which was previously observed by BESII, is confirmed with a statistical significance that is larger than 20 sigma. In addition, in the pi(+)pi(-)eta' invariant-mass spectrum, the X(2120) and the X(2370), are observed with statistical significances larger than 7.2 sigma and 6.4 sigma, respectively. For the X(1835), the angular distribution of the radiative photon is consistent with expectations for a pseudoscalar.
2011
106
072002-1
072002-5
http://link.aps.org/doi/10.1103/PhysRevLett.106.072002
BARYONIUM; GLUEBALL
M. Ablikim; M. N. Achasov; L. An; Q. An; Z. H. An; J. Z. Bai; R. Baldini; Y. Ban; J. Becker; N. Berger; M. Bertani; J. M. Bian; I. Boyko; R. A. Briere...espandi
File in questo prodotto:
File Dimensione Formato  
PRL106(2011)072002 - Confirmation of X.pdf

Accesso aperto

Tipo di file: PDF EDITORIALE
Dimensione 249.2 kB
Formato Adobe PDF
249.2 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/2318/88163
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 146
  • ???jsp.display-item.citation.isi??? 121
social impact