Difference between revisions of "Non-global logarithms"
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| − | In [[perturbative quantum chromodynamics]], '''non-global logarithms''' are a particular class of [[Logarithmic enhancement|logarithmically enhanced]] higher-order corrections.<ref>Mrinal Dasgupta, Gavin Salam: ''Resummation of nonglobal QCD observables'', [http://dx.doi.org/10.1016/S0370-2693(01)00725-0 Phys. Lett. B 512 (2001) 323-330], ([http://inspirehep.net/record/555905 inSPIRE:555905])</ref> '' | + | In [[perturbative quantum chromodynamics]], '''non-global logarithms''' are a particular class of [[Logarithmic enhancement|logarithmically enhanced]] higher-order corrections.<ref>Mrinal Dasgupta, Gavin Salam: ''Resummation of nonglobal QCD observables'', [http://dx.doi.org/10.1016/S0370-2693(01)00725-0 Phys. Lett. B 512 (2001) 323-330], ([http://inspirehep.net/record/555905 inSPIRE:555905])</ref> These contributions are called ''non-global'', because they arise in observables that are sensitive to emissions in only part of the [[phase space]]. Non-global logarithms are mainly driven by wide-angle soft gluons emitting softer gluons into a region of interest, and do not follow a simple exponentiation rule. Since many experimentally relevant observables are only sensitive to partons in a restricted phase space region (e.g. [[event shape]] variables and [[jet|hadronic jets]]), non-global terms are important to consider in order to achieve theoretical predictions that are accurate beyond leading logarithms. |
== References == | == References == | ||
<references /> | <references /> | ||
Latest revision as of 21:42, 8 November 2017
In perturbative quantum chromodynamics, non-global logarithms are a particular class of logarithmically enhanced higher-order corrections.[1] These contributions are called non-global, because they arise in observables that are sensitive to emissions in only part of the phase space. Non-global logarithms are mainly driven by wide-angle soft gluons emitting softer gluons into a region of interest, and do not follow a simple exponentiation rule. Since many experimentally relevant observables are only sensitive to partons in a restricted phase space region (e.g. event shape variables and hadronic jets), non-global terms are important to consider in order to achieve theoretical predictions that are accurate beyond leading logarithms.
References
- ↑ Mrinal Dasgupta, Gavin Salam: Resummation of nonglobal QCD observables, Phys. Lett. B 512 (2001) 323-330, (inSPIRE:555905)
