منابع مشابه
in the Heavy Quark Limit
We study B → φK and B → φXs decays in the heavy quark limit using perturbative QCD. The next leading order corrections introduce substantial modifications to the naive factorization results (more than 50%). The branching ratio Br(B → φK) is predicted to be in the range (FB→K 1 (mφ)/0.33)(3.5 ∼ 4.2)× 10−6 which is within the one σ allowed region from the central value of 6.2×10−6 measured by CLE...
متن کاملHeavy Quark Limit in the Light Front Quark Model
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...
متن کاملHeavy Quark – Light Diquark Approach to a Heavy Baryon in the Heavy Quark Symmetry Limit
. Abstract— The masses and distance configurations of the ground and excited states of heavy – charmed and bottom baryons J =1/2 ,3/2,containing a single heavy quark and a light diquark are studied within HQS limit of the HQLD sector of NRQCD framework. We find how the average distances between the heavy quark and the center of mass of the light diquark are smaller than the size of the light di...
متن کاملTHE 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 limit in the model with confined light quarks and infrared heavy quark propagators
We have studied the weak decay constants and the Isgur-Wise form factor of the B and D mesons in the heavy quark limit, by employing a relativistic quark confinement model. It is an attempt to improve our previous work within the same line of thinking, but by incorporating a couple of novel aspects. First, the infrared behavior of the heavy quark is considered by modifying its conventional prop...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2001
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.63.094004