Perspectives for the measurement of Ds mesons via the Ds →K K−π channel in the ALICE experimentReportar como inadecuado

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The European Physical Journal C

, Volume 62, Issue 1, pp 229–235

First Online: 19 February 2009Received: 20 October 2008Revised: 02 February 2009


Heavy quarks, such as charm, are produced in hard scatterings in the early stages of high energy nucleus-nucleus collisions and are expected to be a powerful tool to investigate the properties of the quark gluon plasma QGP. The tracking detectors of the ALICE apparatus will allow to track and identify particles in central rapidity range down to low Pt. Among D mesons it would be particularly interesting to measure Ds yield via an exclusive hadronic decay channel because it could help to disentangle different hadronization mechanisms. The possibility of reconstructing the Ds meson through its Ds→KKπ decay channel in the central barrel was studied. The problem considered is characterized by the comparatively low yield of the Ds mesons against the huge amount of combinatorial background. Different kinematic and topological cuts have been studied in order to increase the signal-to-background ratio and the statistical significance. In addition, Ds mesons preferentially decay through intermediate resonant states and this fact can improve the separation of signal from background. Results of cut parameters tuning and values of significance for an analysis performed on simulated data are presented.

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Autor: S. Senyukov


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