The cross sections for the hadroproduction of the (Formula presented) and (Formula presented) states of charmonium in proton-silicon collisions at (Formula presented) GeV have been measured in Fermilab fixed target experiment 771. The χ states were observed via their radiative decay to (Formula presented) where the photon converted to (Formula presented) in the material of the spectrometer. The estimated values for the (Formula presented) and (Formula presented) cross sections for (Formula presented) are (Formula presented) and (Formula presented) nb per nucleon, respectively. The resulting (Formula presented) ratio of (Formula presented) although somewhat larger than most theoretical expectations, can be accommodated by the latest theoretical estimates. © 2000 The American Physical Society.
Hadroproduction of the [formula presented] and [formula presented] states of charmonium in 800-[formula presented] proton-silicon interactions
Bonomi G.;
2004-01-01
Abstract
The cross sections for the hadroproduction of the (Formula presented) and (Formula presented) states of charmonium in proton-silicon collisions at (Formula presented) GeV have been measured in Fermilab fixed target experiment 771. The χ states were observed via their radiative decay to (Formula presented) where the photon converted to (Formula presented) in the material of the spectrometer. The estimated values for the (Formula presented) and (Formula presented) cross sections for (Formula presented) are (Formula presented) and (Formula presented) nb per nucleon, respectively. The resulting (Formula presented) ratio of (Formula presented) although somewhat larger than most theoretical expectations, can be accommodated by the latest theoretical estimates. © 2000 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
