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Quark and gluon contents of a lepton at high energies
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Journal Article
Quark and gluon contents of a lepton at high energies
2022
Overview
A
bstract
In high-energy leptonic collisions, such as at a multi-TeV muon collider, the collinear splittings of the electroweak (EW) gauge bosons and leptons are the dominant phenomena, and the scattering processes should thus be formulated in terms of the EW parton distribution functions (EW PDFs). We complete this formalism in the Standard Model to include the QCD sector and evaluate the quark and gluon PDFs inside a lepton at the double-log accuracy. The splittings of the photon and subsequently the quarks and gluons control the quark/gluon PDFs below the EW scale. The massive gauge bosons lead to substantial contributions at high scales. The jet production cross section can reach the order of a few nb (50 pb) in
e
+
e
−
(
μ
+
μ
−
) collisions, at the TeV c.m. energies with a moderate acceptance cut, that governs the overall event shape up to about
p
T
j
∼ 60 GeV. To complete the picture, we also provide an estimation of the total cross section for the photon-induced hadronic production at low partonic energies, which can reach the level of one hundred or a few tens of nb in high-energy electron or muon collisions.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V,SpringerOpen
Subject
