Light Quark Fragmentation Research Articles

Asymmetries in heavy meson production from light quark fragmentation

We discuss the possibility of the asymmetry in \(D^-/D^+\) production from \(\pi^-\) beams, being a direct consequence of the properties of the light quark fragmentation function into heavy mesons. The main features of the asymmetry, as a function of \(x_{\mathrm{F}}\), are easily described. An integrated sum rule for the \(D^-, D^+\) multiplicity difference is presented. Predictions for the asymmetry in \(B\) meson production are given.

Asymmetries in heavy meson production from light quark fragmentation

We discuss the possibility of the asymmetry in $D^-/D^+$ production, from $\pi^-$ beams, being a direct consequence of the properties of the light quark fragmentation function into heavy mesons. The main features of the asymmetry, as a function of $x_F$, are easily described. An integrated sum-rule for the $D^-, D^+$ difference, is presented. Predictions for the asymmetry, in $B$ meson production, are given.

A method for measuring strangeness suppression in light quark fragmentation at LEP

A new method is described for measuring strangeness suppression in light quark fragmentation using the reaction e +e − → Z → q q . The technique is based on q q electroweak asymmetries and uses only strange mesons of one type. Since it does not rely on a comparison of the production of states with different masses, the method could provide a test of whether the strangeness suppression in light quark fragmentation operates at the quark or at the hadron level. The method is essentially independent of Monte Carlo models and is relatively free of experimental systematic errors.

Like sign dimuons revisited

A nonperturbativeC\(\bar C\) component in the light quark fragmentation can naturally account for all the neutrino induced like sign dimuon data. The perturbativeC\(\bar C\) component falls short of data by at least a factor 10, when one uses the constraint on charm quark mass from muonproduction of charm. Several kinematic distributions can be used to discriminate the nonperturbativeC\(\bar C\) model from the perturbative one as well as from the background. The available data on distributions seem to favour the nonperturbative model predictions.