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15 صفحه اولThe perturbative Regge-calculus regime of Loop Quantum Gravity
The relation between Loop Quantum Gravity and Regge calculus has been pointed out many times in the literature. In particular the large spin asymptotics of the Barrett-Crane vertex amplitude is known to be related to the Regge action. In this paper we study a semiclassical regime of Loop Quantum Gravity and show that it admits an effective description in terms of perturbative area-Regge-calculu...
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15 صفحه اولGluon Regge Trajectory in the Two-loop Approximation *
Evaluating two-loop integrals in the transverse momentum space we obtain the trajectory of the Reggeized gluon in QCD in an explicit form in the two-loop approximation. It is presented as an expansion in powers of (D − 4) for the space-time dimension D tending to the physical value D = 4. As the result of a remarkable cancellation the third order pole in D − 4 disappears in the trajectory and t...
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The multi–Regge form of QCD amplitudes with gluon exchanges is proved in the next-to-leading approximation. The proof is based on the bootstrap relations, which are required for the compatibility of this form with the s-channel unitarity. We show that the fulfillment of all these relations ensures the Reggeized form of energy dependent radiative corrections order by order in perturbation theory...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2017
ISSN: 1029-8479
DOI: 10.1007/jhep11(2017)077