We present the [Formula presented] and [Formula presented] differential cross sections of [Formula presented] and [Formula presented], respectively, in the ranges [Formula presented] and [Formula presented]. The data samples are constituted by about 12 000 [Formula presented] and 200 [Formula presented] produced in proton-silicon interactions at 800 GeV/[Formula presented] and decaying into opposite sign muons. The [Formula presented] and [Formula presented] distributions are compared with recent results from experiments E789 at the same energy and to leading order QCD predictions using the MRS D0 parametrization for the parton structure function. The measured shapes of the differential cross sections, except for the [Formula presented] at small [Formula presented] agree very well with the prediction, even though their value is quite a bit larger than the prediction. We also present the [Formula presented] differential cross section of the [Formula presented] which indicates unpolarized production in contrast with color octet models predictions. © 1997 The American Physical Society.
Differential cross sections of [Formula presented] and [Formula presented] in 800 GeV/[Formula presented]-Si interactions
Bonomi G.;
2004-01-01
Abstract
We present the [Formula presented] and [Formula presented] differential cross sections of [Formula presented] and [Formula presented], respectively, in the ranges [Formula presented] and [Formula presented]. The data samples are constituted by about 12 000 [Formula presented] and 200 [Formula presented] produced in proton-silicon interactions at 800 GeV/[Formula presented] and decaying into opposite sign muons. The [Formula presented] and [Formula presented] distributions are compared with recent results from experiments E789 at the same energy and to leading order QCD predictions using the MRS D0 parametrization for the parton structure function. The measured shapes of the differential cross sections, except for the [Formula presented] at small [Formula presented] agree very well with the prediction, even though their value is quite a bit larger than the prediction. We also present the [Formula presented] differential cross section of the [Formula presented] which indicates unpolarized production in contrast with color octet models predictions. © 1997 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
