منابع مشابه
THE ROLE OF QUARK POLARIZATION IN HEAVY QUARK FRAGMENTATION
We calculate the exact fragmentation functions for c and b quark fragmentation taking into account the spin orientation of the initial heavy quark in the form of analytical and rather simple expressions. Our calculations show that spin orientation may have an important effect on the fragmentation spectrum. This effect is more striking in the cases of c ?D, D*; c? ? , ? , and ?B , B *.
متن کاملHeavy-Quark Fragmentation
We study perturbative and non-perturbative aspects of heavy-quark fragmentation into hadrons, emphasizing the large-x region, where x is the energy fraction of the detected hadron. We first prove that when the moment index N and the quark mass m get large simultaneously with the ratio NΛ/m fixed, the fragmentation function depends on this ratio alone. This opens up the way to formulate the non-...
متن کاملHeavy quark fragmentation functions in the heavy quark effective theory.
We calculate fragmentation functions for a b-quark to fragment into color-singlet P-wave bound states c̄b in the Heavy Quark Effective Theory with the exact account of O(1/mb) corrections. We demonstrate an agreement of the obtained results with the corresponding calculations carried out in quantum chromodynamics. Introduction. The study of heavy quarkonia properties is a subject of much current...
متن کاملHeavy-quark Production in the Target Fragmentation Region Heavy-quark Production in the Target Fragmentation Region
Fixed-target experiments permit the study of hadron production in the target fragmentation region. It is expected that the tagging of speci c particles in the target fragments can be employed to introduce a bias in the hard scattering process towards a speci c avour content. The case of hadrons containing a heavy quark is particularly attractive because of the clear experimental signatures and ...
متن کاملExperimental Results on Heavy Quark Fragmentation *
Experimental results on c-and b-quark fragmentation are reviewed. The discussion is concentrated on measurements of heavy-quark fragmentation functions and fragmentation fractions. Measurements of various heavy-quark fragmentation ratios are also discussed. The experimental results are compared with theoretical expectations and model predictions.
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2003
ISSN: 0550-3213
DOI: 10.1016/s0550-3213(03)00435-8