期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 11, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP11(2018)009
关键词
QCD Phenomenology
资金
- Swedish Research Council [2012-02744, 2016-05996]
- MC-netITN3 H2020 Marie Curie Initial Training Network [722104]
- European Union's Horizon 2020 research and innovation programme [668679]
- COST action (Unraveling new physics at the LHC through the precision frontier) [CA16201]
- Vinnova [2012-02744] Funding Source: Vinnova
- Swedish Research Council [2012-02744] Funding Source: Swedish Research Council
We investigate the effects of keeping the full color structure for parton emissions in parton showers for both LEP and LHC. This is done within the Herwig 7 dipole shower, and includes gluon emission, gluon splitting, initial state branching processes, as well as hadronization. The subleading N-c terms are included as color matrix element corrections to the splitting kernels by evolving an amplitude-level density operator and correcting the radiation pattern for each parton multiplicity, up to a fixed number of full color emissions, after which a standard leading color shower takes over. Our results are compared to data for a wide range of LEP and LHC observables and show that the subleading N-c corrections tend to be small for most observables probing hard, perturbative dynamics, for both LEP and LHC. However, for some of these observables they exceed 10%. On soft physics we find signs of significantly larger effects.
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