Azimuthal asymmetries in unpolarized SIDIS and Drell-Yan processes: a case study towards TMD factorization at subleading twist

Abstract

We consider the azimuthal distribution of the final observed hadron in semi-inclusive deep-inelastic scattering and the lepton pair in the Drell-Yan process. In particular, we focus on the $\cos \varphi$ modulation of the unpolarized cross section and on its dependence upon transverse momentum. At low transverse momentum, for these observables we propose a factorized expression based on tree-level approach and conjecture that the same formula is valid in transverse-momentum dependent (TMD) factorization when written in terms of subtracted TMD parton distributions. Our formula correctly matches with the collinear factorization results at high transverse momentum, solves a long-standing problem and is a necessary step towards the extension of the TMD factorization theorems up to the subleading twist.

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Cited by in corpus (17)

• Unpolarized Transverse Momentum Distributions from a global fit of Drell-Yan and Semi-Inclusive Deep-Inelastic Scattering data
• Drell-Yan $q_T$ Resummation of Fiducial Power Corrections at N${}^3$LL
• Azimuthal Angular Asymmetry of Soft Gluon Radiation in Jet Production
• Anisotropy in Dijet Production in Exclusive and Inclusive Processes
• A Fixed-Target Programme at the LHC: Physics Case and Projected Performances for Heavy-Ion, Hadron, Spin and Astroparticle Studies
• Flavor dependence of unpolarized quark Transverse Momentum Distributions from a global fit
• Factorization for Azimuthal Asymmetries in SIDIS at Next-to-Leading Power
• Transverse structure of the pion beyond leading twist with basis light-front quantization
• Observation of Beam Spin Asymmetries in the Process $ep\to e{\pi }^{+}{\pi }^{-}X$ with CLAS12
• Transverse $\Lambda$ Polarization in $e^{+}{e}^{-}$ collisions
• Definition and evolution of transverse momentum dependent distribution of twist-three
• The Drell-Yan process with pions and polarized nucleons
• Perturbative $T$-odd asymmetries in the Drell-Yan process revisited
• Semi-inclusive deep inelastic scattering off a tensor-polarized spin-1 target
• Leading and higher twist transverse momentum dependent parton distribution functions in the spectator model
• Evolution of unpolarized transverse momentum dependent parton distributions of twist-3
• QCD Beyond Leading Power