firstname = "Boris" lastname = "Ermolaev" email = "boris.ermolaev@cern.ch" affiliation = "Ioffe Institute for Physics and Technology" city = "St. Petersburg" country = "Russia" passportname = "" birthday = "" citizenship = "" passportnumber = "" passportissued = "" passportexpire = "" workplace = "" workaddress = "" visadates = "" talktitle = "Relations between collinear and k_T -factorizations" section = "A - Particle physics" talkabstract = "Collinear and $k_T$- factorizations were introduced from different theoretical grounds, applied to different evolution equations and look totally unrelated to each other. We argue that they can approximately be related when the $k_T$-dependence of the parton distributions has a peaked shape. The sharper this dependence is, the more accurate the more precise the relation is. This relation can be checked by analysis of experimental date " comments = "" submit = 0