Non-factorizable contributions to deep inelastic scattering at large x
نویسنده
چکیده
We use soft-collinear effective theory (SCET) to study the factorization properties of deep inelastic scattering in the region of phase space where (1− x) ∼ ΛQCD/Q. By applying a regions analysis to loop diagrams in the Breit frame, we show that the appropriate version of SCET includes anti-hard-collinear, collinear, and softcollinear fields. We find that the effects of the soft-collinear fields spoil perturbative factorization even at leading order in the 1/Q expansion.
منابع مشابه
Non-factorizable Contributions to the Large Rapidity Gap at Hera
The large rapidity gap events from HERA are analyzed within a model containing a pomeron and an f − reggeon contribution. The choice for the pomeron contribution is based on the Donnachie-Landshoff model. The dependence of the " effective intercept " of the pomeron on the momentum fraction β and on its Bjorken variable ξ is calculated. The increasing precision of the HERA-measurements and the e...
متن کاملDeep Inelastic Scattering — Theory and Phenomenology A
Recent developments in theory and phenomenology relevant to deep inelastic lepton scattering are reviewed, concentrating on the following topics: predicted behaviour of non-singlet and polarized structure functions at small x; theoretical studies of saturation and unitarity effects at small x in quarkonium scattering; renormalons and higher twist contributions; next-to-leading-order calculation...
متن کاملHigher Twist Contributions to Deep-Inelastic Structure Functions
In wide kinematic regions the deeply inelastic structure functions can be described by their leading twist contributions within Quantum Chromodynamics (QCD). Higher twist corrections [1] emerge both in the region of large [2,3] and small values [4,5] of the Bjorken variable x. The leading twist sector, both for unpolarized and polarized deeply inelastic scattering, is well explored within pertu...
متن کاملOn Soft Gluon Effects in Deep-Inelastic Structure Functions
The behaviour of the quark coefficient functions in deep-inelastic scattering is investigated for large values of the Bjorken variable x. By combining results of soft-gluon resummation and fixed-order calculations, we determine the coefficients of the four leading large-x logarithms, α s [{ln(1− x)} /(1− x)]+, l = 1, . . . 4, to all orders in the strong coupling constant αs. This result include...
متن کاملCERN{TH.6871/93 Factorization and Jet Clustering Algorithms for Deep Inelastic Scattering
Jet clustering algorithms for nal states in deep inelastic lepton scattering are discussed from a theoretical viewpoint. The importance of factorization and the special rôle of the Breit frame of reference are stressed. Predictions of jet cross sections in factorizable JADEand k?-type algorithms are presented. CERN{TH.6871/93 May 1993 Talk at 3rd UK Phenomenology Initiative: HERA The New Fronti...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008