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9 papers · 2 filters
Massive Neutrinos in Astrophysics
G. G. Raffelt, W. Rodejohann
An introduction to various topics in neutrino astrophysics is given for students with little prior exposure to this field. We explain neutrino production and propagation in stars,…
Can Geodesics in Extra Dimensions Solve the Cosmological Horizon Problem?
Daniel J. H. Chung, Katherine Freese
We demonstrate a non-inflationary solution to the cosmological horizon problem in scenarios in which our observable universe is confined to three spatial dimensions (a three-brane)…
Physics of the Power Corrections in QCD
F. V. Gubarev, M. I. Polikarpov, V. I. Zakharov
We review the physics of the power corrections to the parton model. In the first part, we consider the power corrections which characterize the infrared sensitivity of Feynman grap…
Charmonium suppression by gluon bremsstrahlung in p-A and A-B collisions
J. Huefner, Y. B. He, B. Z. Kopeliovich
Prompt gluons are an additional source for charmonium suppression in nuclear collisions, in particular for nucleus-nucleus collisions. These gluons are radiated as bremsstrahlung i…
Nonperturbative Effects in Gluon Radiation and Photoproduction of Quark Pairs
B. Z. Kopeliovich, A. Schaefer, A. V. Tarasov
We introduce a nonperturbative interaction for light-cone fluctuations containing quarks and gluons. The interaction squeezes the transverse size of these fluctuations in…
Leptogenesis with Dirac Neutrinos
Karin Dick, Manfred Lindner, Michael Ratz +1
We describe a "neutrinogenesis" mechanism whereby, in the presence of right-handed neutrinos with sufficiently small pure Dirac masses, (B+L)-violating sphaleron processes create t…