Speaker
Description
We review the treatment of inclusive small radius jets and their substructure within Soft Collinear Effective Theory (SCET). The cross section for (semi-) inclusive jet observables can be written in a factorized form in terms of hard functions and so-called semi-inclusive jet functions (siJFs). The siJFs satisfy renormalization group (RG) equations which take the form of standard timelike DGLAP evolution equations analogous to collinear fragmentation functions. By solving these RG equations, the resummation of potentially large single logarithms in the jet size parameter $\alpha_s^n \ln^n R$ can be achieved. In addition, we consider jet substructure observables performed on inclusively identified jets which can be easily measured at the LHC. An important example is the jet fragmentation function, where a specific hadron is identified inside a reconstructed jet. We present numerical results at NLO+NLL$_R$ accuracy and compare to existing data from the LHC.
