99 research outputs found
Remarks on Diffractive Dissociation within JIMWLK Evolution at NLO
We discuss the high energy diffractive dissociation in DIS at the Next to
Leading Order. In the large dipole limit we derive the NLO version of the
Kovchegov-Levin equation. We argue that the original structure of the equation
is preserved, that is it coincides with the Balitsky-Kovchegov equation at NLO.Comment: 5 pages, a ref added. To appear in PL
High Energy QCD at NLO: from light-cone wave function to JIMWLK evolution
Soft components of the light cone wave-function of a fast moving projectile
hadron is computed in perturbation theory to third order in QCD coupling
constant. At this order, the Fock space of the soft modes consists of
one-gluon, two-gluon, and a quark-antiquark states. The hard component of the
wave-function acts as a non-Abelian background field for the soft modes and is
represented by a valence charge distribution that accounts for non-linear
density effects in the projectile. When scattered off a dense target, the
diagonal element of the S-matrix reveals the Hamiltonian of high energy
evolution, the JIMWLK Hamiltonian. This way we provide a new direct derivation
of the JIMWLK Hamiltonian at the Next-to-Leading Order.Comment: 83 pages, 15 figures; explanatory comments added, published versio
Anomalous transport from holography: Part I
We revisit the transport properties induced by the chiral anomaly in a
charged plasma holographically dual to anomalous Maxwell
theory in Schwarzschild-. Off-shell constitutive relations for vector
and axial currents are derived using various approximations generalising most
of known in the literature anomaly-induced phenomena and revealing some new
ones. In a weak external field approximation, the constitutive relations have
all-order derivatives resummed into six momenta-dependent transport coefficient
functions: the diffusion, the electric/magnetic conductivity, and three anomaly
induced functions. The latter generalise the chiral magnetic and chiral
separation effects. Nonlinear transport is studied assuming presence of
constant background external fields. The chiral magnetic effect, including all
order nonlinearity in magnetic field, is proven to be exact when the magnetic
field is the only external field that is turned on. Non-linear corrections to
the constitutive relations due to electric and axial external fields are
computed.Comment: v1: 42 pages, 10 multi-figures, 3 appendices; v2: minor corrections
introduced and a few refs adde
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