Results 71 to 80 of about 6,699 (190)

Can we trust small x resummation?

, 2009
We review the current status of small x resummation of evolution of parton distributions and of deep-inelastic coefficient functions. We show that the resummed perturbative expansion is stable, robust upon different treatments of subleading terms, and ...
R. D. Ball, Altarelli, Guido, Ball, Richard D., Forte, Stefano, S. Forte, G. Altarelli   +5 more
core   +1 more source

Sudakov resummation of multiparton QCD cross sections [PDF]

, 2003
We present the general expressions for the resummation, up to next-to-leading logarithmic accuracy, of Sudakov-type logarithms in processes with an arbirtrary number of hard-scattering partons.
BONCIANI, ROBERTO, Stefano Catani, Bonciani, R, Mangano, Michelangelo L, Nason, P, Michelangelo L. Mangano, Catani, S, Nason, Paolo, Mangano, Michelangelo L., Paolo Nason, Catani, Stefano   +10 more
core   +1 more source

TEMPERATURE RENORMALIZATION GROUP AND RESUMMATION [PDF]

International Journal of Modern Physics A, 1993
The temperature renormalization group equation (TRGE) is compared with a diagrammatic expansion for the (ϕ4)4-theory. It is found that the one-loop TRGE resums the leading powers of temperature for the effective mass. A two-loop contribution to TRGE is required to do the leading resummation for the coupling constant.
openaire   +2 more sources

Factorization and resummation for jet broadening [PDF]

Physics Letters B, 2011
15 pages, 4 ...
Becher Thomas, Bell Guido, Neubert Matthias   +2 more
openaire   +5 more sources

Self consistent thermal resummation: a case study of the phase transition in 2HDM

Journal of High Energy Physics
An accurate description of the scalar potential at finite temperature is crucial for studying cosmological first-order phase transitions (FOPT) in the early Universe.
Pedro Bittar, Subhojit Roy, Carlos E. M. Wagner   +2 more
doaj   +1 more source

Towards parton distribution functions with small-x resummation: HELL 2.0

Journal of High Energy Physics, 2017
In global fits of parton distribution functions (PDFs) a large fraction of data points, mostly from the HERA collider, lies in a region of x and Q 2 that is sensitive to small-x logarithmic enhancements.
Marco Bonvini, Simone Marzani, Claudio Muselli   +2 more
doaj   +1 more source

Sudakov resummations at higher orders [PDF]

Nuclear Physics B - Proceedings Supplements, 2006
We summarize our recent results on the resummation of hard-scattering coefficient functions and on-shell form factors in massless perturbative QCD. The threshold resummation has been extended to the fourth logarithmic order for deep-inelastic scattering, Drell-Yan lepton pair production and Higgs production via gluon-gluon fusion.
Moch, S., Vogt, A., Vermaseren, J.
openaire   +2 more sources

Resummation for QCD hard scattering [PDF]

Nuclear Physics B, 1997
We resum distributions that are singular at partonic threshold (the elastic limit) in heavy quark production, in terms of logarithmic behavior in moment space. The method may be applied to a variety of cross sections sensitive to the edge of phase space, including transverse momentum distributions.
Kidonakis, Nikolaos, Sterman, George
openaire   +2 more sources

HERA data and collinearly-improved BK dynamics

Physics Letters B, 2020
Within the framework of the dipole factorisation, we use a recent collinearly-improved version of the Balitsky-Kovchegov equation to fit the HERA data for inclusive deep inelastic scattering at small Bjorken x.
B. Ducloué, E. Iancu, G. Soyez, D.N. Triantafyllopoulos   +3 more
doaj   +1 more source

Factorization and resummation for jet processes

Journal of High Energy Physics, 2016
Abstract From a detailed analysis of cone-jet cross sections in effective field theory, we obtain novel factorization theorems which separate the physics associated with different energy scales present in such processes.
Thomas Becher, Matthias Neubert, Lorena Rothen, Ding Yu Shao   +3 more
openaire   +4 more sources