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We describe a QCD motivated model for total cross-sections which uses the eikonal representation and incorporates QCD mini-jets to drive the rise with energy of the cross-section, while the impact parameter distribution is obtained through the Fourier transform of the transverse momentum distribution of soft gluons emitted in the parton-parton interactions giving rise to mini-jets in the final state. A singular but integral expression for the running coupling constant in the infrared region is part of this model.
Comment: 7 pages, 1 figure, presented at Hadron structure 07, HS07, Modra-Harmonia, September 3-7, 2007
Comment: 4 pages, 1 figure, uses slac_one.rtx, 34th ICHEP Conference, Philadelphia 2008
Comment: 5 pages, 3 figures, presented at ISMD08, 15-20 September 2008, DESY
Comment: 7 pages, 3 figures, presented at MPI08, Perugia, October 27-31, 2008
Comment: 6 pages, 2figures, Presented at FLAVIAnet Workshop, Kazimierz, 23-27 July, 2009. Correction of formula (9) with a factor \pi in the denominator and further minor corrections to the text
A new timescale has recently been established for human mitochondrial DNA (mtDNA) lineages, making mtDNA at present the most informative genetic marker system for studying European prehistory. Here, we review the new chronology and compare mtDNA with Y-chromosome patterns, in order to summarize what we have learnt from archaeogenetics concerning five episodes over the past 50,000 years which significantly contributed to the settlement history of Europe: the pioneer colonisation of the Upper Palaeolithic, the Late Glacial re-colonisation of the continent from southern refugia after the Last Glacial Maximum, the postglacial re-colonization of deserted areas after the Younger Dryas cold snap, the arrival of Near Easterners with an incipient Neolithic package, and the small-scale migrations along continent-wide economic exchange networks b...
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