Light-Quark, Heavy-Quark Systems
نویسندگان
چکیده
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 *.
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In this series of lectures, I shall begin with the current investigations on phenomenology of hadron dynamics to demonstrate the importance of solving hadronic bound states within the framework of light-front (LF) QCD. Then, I will describe the basic procedure how to formulate the canonical theory of LFQCD, including lightfront quantization of QCD, light-front gauge singularity, and light-front...
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We derive general relations among hadronic form factors involving one heavy meson bq and another, not necessarily heavy, meson Qq. The relations are valid to all orders of mass corrections of mQ .
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Matching of light-light quark currents in QCD with a heavy flavour and in the lowenergy effective QCD is calculated in MS at two loops. Heavy-light HQET currents are similarly considered. Consider QCD with nl light flavours and a single heavy one having mass M . Processes involving only light fields with momenta pi ≪ M can be described by an effective field theory — QCD with nl flavours plus 1/...
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An explicit relativistic light-front quark model is presented which gives the momentum transfer dependent form factors of weak hadronic currents among heavy pseudoscalar and vector mesons in the whole accessible kinematical region 0 ≤ q2 ≤ q2 max. It is shown that in the limit of infinite masses of active quarks these form factors can be expressed in terms of universal IsgurWise function. The e...
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ژورنال
عنوان ژورنال: Annual Review of Nuclear and Particle Science
سال: 1992
ISSN: 0163-8998,1545-4134
DOI: 10.1146/annurev.ns.42.120192.000533