The resonance parameters of χ c0, the 31P0 resonance of charmonium, have been measured at the Fermilab Antiproton Accumulator by means of the reaction pp → χc0 → γ J/ψ → γ (e+, e-. The results are M(ψc0) = 3417.4+1.8-1.9 ± 0.2 Me V/c2, Τ(03C8;c0 → pp) × B(ψc0 → J/Ψ γ) × B(J/ψ → e+e−) = 2.89+ 0.67- 0.53 ± 0.14 eV. Using known branching ratios we also obtain Τ (Χc0 → pp) = 8.0+1.9+3.5-1.5-1.9keV. These results are discussed in relation to the other ΧCJ states and to theoretical predictions. © 1999 The American Physical Society.

Study of the chi(c0)(1(3)P(0)) state of charmonium formed in (p)over-barp annihilations

CALABRESE, Roberto;DALPIAZ, Pietro;LUPPI, Eleonora;
1999

Abstract

The resonance parameters of χ c0, the 31P0 resonance of charmonium, have been measured at the Fermilab Antiproton Accumulator by means of the reaction pp → χc0 → γ J/ψ → γ (e+, e-. The results are M(ψc0) = 3417.4+1.8-1.9 ± 0.2 Me V/c2, Τ(03C8;c0 → pp) × B(ψc0 → J/Ψ γ) × B(J/ψ → e+e−) = 2.89+ 0.67- 0.53 ± 0.14 eV. Using known branching ratios we also obtain Τ (Χc0 → pp) = 8.0+1.9+3.5-1.5-1.9keV. These results are discussed in relation to the other ΧCJ states and to theoretical predictions. © 1999 The American Physical Society.
1999
Ambrogiani, M; Argiro, S; Bagnasco, S; Baldini, W; Bettoni, D; Borreani, G; Buzzo, A; Calabrese, Roberto; Cester, R; Dalpiaz, Pietro; Fan, X; Garzoglio, G; Gollwitzer, Ke; Hahn, A; Jin, S; Kasper, J; Lasio, G; LO VETERE, M; Luppi, Eleonora; Maas, P; Macri, M; Mandelkern, M; Marchetto, F; Marinelli, M; Marsh, W; Martini, M; Menichetti, E; Mussa, R; Obertino, Mm; Pallavicini, M; Pastrone, N; Patrignani, C; Pedlar, Tk; Peoples, J; Pordes, S; Robutti, E; Rosen, J; Rumerio, P; Santroni, A; Savrie, M; Schultz, J; Seth, Kk; Stancari, G; Stancari, M; Streets, J; Tomaradze, A; Werkema, S; Zioulas, G; CA E835, Collaboration
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in SFERA 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/11392/1211582
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 25
  • ???jsp.display-item.citation.isi??? 21
social impact