Double parton distributions out of bounds in colour space

Abstract We investigate the positivity of double parton distributions with a non-trivial dependence on the parton colour. It turns out that positivity is not preserved by leading-order evolution from lower to higher scales, in contrast to the case in which parton colour is summed over. We also study...

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Autores principales:	M. Diehl, J. R. Gaunt, P. Pichini, P. Plößl
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/5f0295b5900f43058bc662b3d8d24119
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spelling	oai:doaj.org-article:5f0295b5900f43058bc662b3d8d241192021-11-28T12:11:44ZDouble parton distributions out of bounds in colour space10.1140/epjc/s10052-021-09822-11434-60441434-6052https://doaj.org/article/5f0295b5900f43058bc662b3d8d241192021-11-01T00:00:00Zhttps://doi.org/10.1140/epjc/s10052-021-09822-1https://doaj.org/toc/1434-6044https://doaj.org/toc/1434-6052Abstract We investigate the positivity of double parton distributions with a non-trivial dependence on the parton colour. It turns out that positivity is not preserved by leading-order evolution from lower to higher scales, in contrast to the case in which parton colour is summed over. We also study the positivity properties of the distributions at small distance between the two partons, where they can be computed in terms of perturbative splitting kernels and ordinary parton densities.M. DiehlJ. R. GauntP. PichiniP. PlößlSpringerOpenarticleAstrophysicsQB460-466Nuclear and particle physics. Atomic energy. RadioactivityQC770-798ENEuropean Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-23 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 M. Diehl J. R. Gaunt P. Pichini P. Plößl Double parton distributions out of bounds in colour space
description	Abstract We investigate the positivity of double parton distributions with a non-trivial dependence on the parton colour. It turns out that positivity is not preserved by leading-order evolution from lower to higher scales, in contrast to the case in which parton colour is summed over. We also study the positivity properties of the distributions at small distance between the two partons, where they can be computed in terms of perturbative splitting kernels and ordinary parton densities.
format	article
author	M. Diehl J. R. Gaunt P. Pichini P. Plößl
author_facet	M. Diehl J. R. Gaunt P. Pichini P. Plößl
author_sort	M. Diehl
title	Double parton distributions out of bounds in colour space
title_short	Double parton distributions out of bounds in colour space
title_full	Double parton distributions out of bounds in colour space
title_fullStr	Double parton distributions out of bounds in colour space
title_full_unstemmed	Double parton distributions out of bounds in colour space
title_sort	double parton distributions out of bounds in colour space
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/5f0295b5900f43058bc662b3d8d24119
work_keys_str_mv	AT mdiehl doublepartondistributionsoutofboundsincolourspace AT jrgaunt doublepartondistributionsoutofboundsincolourspace AT ppichini doublepartondistributionsoutofboundsincolourspace AT pploßl doublepartondistributionsoutofboundsincolourspace
_version_	1718408141776879616

Double parton distributions out of bounds in colour space

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