منابع مشابه
The Virtual Photon-Gluon Impact Factor with Massive Quarks and Exact Gluon Kinematics
We calculate the impact factor coupling a virtual photon to a gluon via a massive quark-antiquark pair at LL order, but with the imposition of the correct gluon kinematics. Exact analytical results are presented in triple Mellin space with respect to scaled Bjorken x, gluon transverse momentum and heavy quark mass. The application of these results to the calculation of approximate NLL coefficie...
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We compute the two-loop corrections to the massless quark form factor γ∗ → qq̄ and gluon form factor H → gg to all orders in the dimensional regularisation parameter ǫ = (4− d)/2. The two-loop contributions to the form factors are reduced to linear combinations of master integrals, which are computed in a closed form, expressed as Γ-functions and generalised hypergeometric functions of unit argu...
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The gauge-invariant three-gluon vertex obtained from the pinch technique is characterized by thirteen nonzero form factors, which are given in complete generality for unbroken gauge theory at one loop. The results are given in d dimensions using both dimensional regularization and dimensional reduction, including the effects of massless gluons and arbitrary representations of massive gauge boso...
متن کاملImpact factors
In this paper we discuss sensitivity of forecasts with respect to the information set considered in prediction; a sensitivity measure called impact factor, IF, is defined. This notion is specialized to the case of VAR processes integrated of order 0, 1 and 2. For stationary VARs this measure corresponds to the sum of the impulse response coefficients. For integrated VAR systems, the IF has a di...
متن کاملRemoving Journal Impact Factors
I applaud the ASM for the decision to put their head above the parapet and cast aside the essentially meaningless metric of journal impact factor (IF). What began as a measure intended to allow quantitative evaluation of the importance of journals, IFs have virtually consumed all other (often more relevant) considerations regarding quality of publication. Ironically, for many of the scientists ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2000
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.61.094005