The resonance parameters of the X-c0, the 1(3)P(0) state of charmonium, have been measured at the Fermilab Antiproton Accumulator in the reaction (p) over barp --> chi(c0) --> gammaJ/psi --> gamma(e(+)e(-)). A large data sample collected during the year 2000 run yields the results: M(chi(c0)) = 3415.4 +/- 0.4 +/- 0.2 MeV/c(2), Gamma(chi(c0)) = 9.8 +/- 1.0 +/- 0.1 MeV, B(chi(c0) --> (p) over barp) x B(chi(c0) --> gammaJ/psi) x B(J/psi --> (e(+)e(-))) = (1.61 +/- 0.11 +/- 0.08) x 10(-7). Taking B(chi(c0) --> gammaJ/psi) and B(J/psi --> e(+)e(-)) from the literature, we obtain B(chi(c0) --> (p) over barp) = (4.1 +/- 0.3(-0.9)(+1.6)) x 10(-4) and Gamma(chic) --> (p) over barp) = (4.0 +/- 0.4(-0.9)(+1.6)) keV.

New measurements of the resonance parameters of the chi(c0)(1(3)P(0)) state of charmonium

CALABRESE, Roberto;DALPIAZ, Pietro;LUPPI, Eleonora;
2002

Abstract

The resonance parameters of the X-c0, the 1(3)P(0) state of charmonium, have been measured at the Fermilab Antiproton Accumulator in the reaction (p) over barp --> chi(c0) --> gammaJ/psi --> gamma(e(+)e(-)). A large data sample collected during the year 2000 run yields the results: M(chi(c0)) = 3415.4 +/- 0.4 +/- 0.2 MeV/c(2), Gamma(chi(c0)) = 9.8 +/- 1.0 +/- 0.1 MeV, B(chi(c0) --> (p) over barp) x B(chi(c0) --> gammaJ/psi) x B(J/psi --> (e(+)e(-))) = (1.61 +/- 0.11 +/- 0.08) x 10(-7). Taking B(chi(c0) --> gammaJ/psi) and B(J/psi --> e(+)e(-)) from the literature, we obtain B(chi(c0) --> (p) over barp) = (4.1 +/- 0.3(-0.9)(+1.6)) x 10(-4) and Gamma(chic) --> (p) over barp) = (4.0 +/- 0.4(-0.9)(+1.6)) keV.
2002
Bagnasco, S; Baldini, W; Bettoni, D; Borreani, G; Buzzo, A; Calabrese, Roberto; Cester, R; Cibinetto, G; Dalpiaz, Pietro; Garzoglio, G; Gollwitzer, K; Graham, M; Hu, M; Joffe, D; Kasper, J; Lasio, G; Lovetere, M; Luppi, Eleonora; Macri, M; Mandelkern, M; Marchetto, F; Marinelli, M; Menichetti, E; Metreveli, Z; Mussa, R; Negrini, M; Obertino, M; Pallavicini, M; Pastrone, N; Patrignani, C; Pordes, S; Robutti, E; Roethel, W; Rosen, J; Rumerio, P; Rusack, R; Santroni, A; Schultz, J; Seo, Sh; Seth, Kk; Stancari, G; Stancari, M; Tomaradze, A; Vidnovic, T; Werkema, S; Zweber, P; CA FERMILAB E835, Collaboration
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1211565
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