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Rapidity loss, spin and angular asymmetries in scattering of a quark from color field of a proton (nucleus)

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arxiv 1912.08878 v1 pith:V7BOAUE7 submitted 2019-12-18 hep-ph nucl-th

classification hep-phnucl-th
keywords quarkscatteringangularasymmetriesgluonshelicitylargeloss
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We calculate the helicity amplitudes for scattering of a quark from both large and small $x$ gluons of a target proton or nucleus using spinor helicity formalism. We show that scattering from large $x$ gluons of the target results in non-zero spin asymmetry at intermediate $p_t$ as well as rapidity loss of the projectile quark. We comment on how this can also generate angular asymmetries in particle production in high energy collisions.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Analytic Solution for the Helicity Evolution Equations at Small $x$ and Large $N_c\&N_f$

    hep-ph 2025-07 conditional novelty 7.0 of 10

    An exact analytic solution of the revised large-Nc and large-Nf small-x helicity evolution equations in QCD, yielding all-order polarized DGLAP anomalous dimensions and small-x growth intercepts.

  2. Forward parton-nucleus scattering at next-to-eikonal accuracy in the CGC

    hep-ph 2024-11 conditional novelty 7.0 of 10

    Full next-to-eikonal quark and gluon propagators in a dynamical gluon background are derived, and forward quark and gluon production cross sections are computed for quark-nucleus and gluon-nucleus scattering.

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