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	Author	Cieri, L.; Colferai, D.
	Title	Four fermion soft emission in QCD hard scattering			Type	Journal Article
	Year	2026	Publication	European Physical Journal C	Abbreviated Journal	Eur. Phys. J. C
	Volume	86	Issue	8	Pages	966 - 17pp
	Keywords
	Abstract	We consider the radiation of two distinguishable soft quark-antiquark pairs ( qq & strns;QQ & strns; ) in a generic process for multiparton hard scattering in QCD. We evaluate the corresponding soft current at tree level in terms of an independent-emission contribution and an irreducible correlation component, which includes strictly non-abelian terms and also terms with an abelian character. The squared current for soft qq & strns;QQ & strns; emission produces colour dipole and colour tripole interactions between the hard-scattering partons, with structures similar to soft gluon-quark-antiquark emission. The colour tripole interactions are odd under charge conjugation and lead to charge asymmetry effects. We extend our analysis by including QED interactions, the emission of two distinguishable soft lepton-antilepton pairs, and mixed quark-antiquark-lepton-antilepton soft emission.
	Address	[Cieri, Leandro] Univ Valencia, Consejo Super Invest Cient, Inst Fis Corpuscular, Parc Cientif, Valencia 46980, Spain; [Colferai, Dimitri] Univ Firenze, Dipartimento Fis & Astron, I-50019 Florence, Italy; [Colferai, Dimitri] INFN Sez Firenze, I-50019 Florence, Italy, Email: dimitri.colferai@unifi.it;
	Corporate Author				Thesis
	Publisher	Springer	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1434-6044	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:001848744800001			Approved	no
	Is ISI	yes	International Collaboration	yes
	Call Number	IFIC @ pastor @			Serial	7389
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