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Combination of Heavy Quark with Partons from Quark-Gluon Matter: a Scaling Probe | | Shi-Yuan Li
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31 Dec 2004 | | Subject: | hep-ph | | Abstract: | In relativistic heavy ion collisions, the cross section of heavy hadron production via the combination of a heavy quark with a light one from the quark-gluon matter can be factorized. It is the convolution of twist-4 combination matrix elements, the parameters corresponding to the parton distributions of the quark-gluon matter, as well as the hard partonic cross section of heavy quark production calculable in PQCD. These parton distributions and combination matrix elements are functions of a scaling variable which is the momentum fraction of the heavy quark w.r.t. the heavy hadron. In the same factorization framework, the combination matrix elements appear in other `simpler’ processes and can be extracted. Taking them as inputs, comparing with data from RHIC and (future) LHC, we can get the parton distributions of the quark-gluon matter just as the similar way we get those of nucleon, pion, or photon, etc.. | | Source: | arXiv, hep-ph/0501290 | | Services: | Forum | Review | PDF | Favorites | |
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