Scalar contribution to the BFKL kernel

We have shown that, provided that the nonperturbative input is regular at the right of the ω=0 singularity of the dominant DGLAP anomalous dimension, the rise of F2 at small x, experimentally measured by the averaged observable [Formula: see text], is input-independent in the perturbative Q2 regime at small x. [Formula: see text] appears to be more input-dependent in the same range. The GRV-type parametrizations verify these properties. Other models, namely the BFKL kernel (QCD dipoles), DGLAP (with a nonperturbative input singular at the right of the ω=0) give different predictions for λ. At moderate Q2, there is a possibility of distinguishing these different perturbative QCD predictions in the near future.

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VARIABLE SPEED OF LIGHT THEORIES: A THERMODYNAMIC ANALYSIS OF PLANETARY AND WHITE DWARF PHENOMENA

International Journal of Modern Physics D ◽

10.1142/s0218271811019141 ◽

2011 ◽

Vol 20 (05) ◽

pp. 805-820

Author(s):

PABLO D. SISTERNA

Keyword(s):

Scalar Field ◽

Time Variation ◽

Equations Of State ◽

Structure Constant ◽

Hydrostatic Equilibrium ◽

Fine Structure Constant ◽

Variable Speed ◽

Speed Of Light ◽

Modified Equations ◽

Scalar Contribution

The thermodynamics of a scalar field interacting with a perfect fluid is studied, and observable consequences of the covariant variable speed of light (VSL) theory proposed by J. Magueijo are obtained. The first law of thermodyamics is modified as the scalar field becomes an additional thermodynamical variable. A recipe to obtain the modified equations of state is also obtained. After discussing the Newtonian limit and the non-relativistic hydrostatic equilibrium equation for the theory, the time-variation of the radius of Mercury induced by the variability of the speed of light (c), and the scalar contribution to the luminosity of white dwarfs are found. Using a bound for the change of that radius and combining it with an upper limit for the variation of the fine-structure constant, a bound on the time-variation of c is set. An independent bound is obtained from luminosity estimates for Stein 2015B.

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On Hermitian separability of the next-to-leading order BFKL kernel for the adjoint representation of the gauge group in the planar $$N=4$$ N = 4 SYM

The European Physical Journal C ◽

10.1140/epjc/s10052-016-4046-4 ◽

2016 ◽

Vol 76 (5) ◽

Cited By ~ 1

Author(s):

V. S. Fadin ◽

R. Fiore

Keyword(s):

Gauge Group ◽

Adjoint Representation ◽

Leading Order ◽

Bfkl Kernel

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