We present a first calculation of the heavy flavor contribution to the longitudinally polarized deep-inelastic scattering structure function , differential in the transverse momentum or the rapidity of the observed heavy quark or antiquark . All results are obtained at next-to-leading order accuracy in QCD within the framework of a newly developed parton-level Monte Carlo generator that also allows one to study observables associated with the produced heavy quark pair such as its invariant mass distribution or its correlation in azimuthal angle. First phenomenological studies are carried out for various heavy quark distributions in a kinematic regime relevant for a future Electron-Ion Collider with a particular emphasis on the expected size of the corresponding double-spin asymmetries and their sensitivity to the still poorly constrained helicity gluon distribution. Theoretical uncertainties associated with the choice of the factorization scale are discussed for selected observables.

Differential heavy quark distributions and correlations in longitudinally polarized deep-inelastic scattering / F. Hekhorn, M. Stratmann. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 104:1(2021 Jul 01), pp. 016033.016033-1-016033.016033-15. [10.1103/PhysRevD.104.016033]

Differential heavy quark distributions and correlations in longitudinally polarized deep-inelastic scattering

F. Hekhorn
Primo
;
2021-07-01

Abstract

We present a first calculation of the heavy flavor contribution to the longitudinally polarized deep-inelastic scattering structure function , differential in the transverse momentum or the rapidity of the observed heavy quark or antiquark . All results are obtained at next-to-leading order accuracy in QCD within the framework of a newly developed parton-level Monte Carlo generator that also allows one to study observables associated with the produced heavy quark pair such as its invariant mass distribution or its correlation in azimuthal angle. First phenomenological studies are carried out for various heavy quark distributions in a kinematic regime relevant for a future Electron-Ion Collider with a particular emphasis on the expected size of the corresponding double-spin asymmetries and their sensitivity to the still poorly constrained helicity gluon distribution. Theoretical uncertainties associated with the choice of the factorization scale are discussed for selected observables.
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
H2020_ERC17SFORT_01 - Proton strucure for discovery at the Large Hadron Collider (NNNPDF) - FORTE, STEFANO - H2020_ERC - Horizon 2020_Europern Research Council - 2017
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/863140
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