On factorisation at small x | Zendy

M. Ciafaloni | Zendy; Dimitri Colferai | Zendy; Gavin P. Salam | Zendy

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On factorisation at small x

Author(s) -

M. Ciafaloni,

Dimitri Colferai,

Gavin P. Salam

Publication year - 2000

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2000/07/054

Subject(s) - factorization , twist , physics , scaling , variety (cybernetics) , function (biology) , mathematical physics , statistical physics , particle physics , mathematics , geometry , algorithm , statistics , evolutionary biology , biology

We investigate factorisation at small x using a variety of analytical andnumerical techniques. Previous results on factorisation in collinear models aregeneralised to the case of the full BFKL equation, and illustrated in theexample of a collinear model which includes higher twist terms. Unlike thesimplest collinear model, the BFKL equation leads to effective anomalousdimensions containing higher-twist pieces which grow as a (non-perturbative)power at small x. While these pieces dominate the effective splitting functionat very small x they do not lead to a break-down of factorisation insofar astheir effect on the predicted scaling violations remains strongly suppressed.Comment: 17 pages, LaTeX. Updated version corrects some small misprints and adds extra preprint number

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