Phenomenological constraints on AN in p↑p→πX from Lorentz invariance relations

Leonard Gamberg; Zhong-Bo Kang; Daniel Pitonyak; Alexei Prokudin

doi:10.1016/j.physletb.2017.04.061

Physics Letters B (Jul 2017)

Phenomenological constraints on AN in p↑p→πX from Lorentz invariance relations

Leonard Gamberg,
Zhong-Bo Kang,
Daniel Pitonyak,
Alexei Prokudin

Affiliations

Leonard Gamberg: Division of Science, Penn State University Berks, Reading, PA 19610, USA
Zhong-Bo Kang: Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA
Daniel Pitonyak: Division of Science, Penn State University Berks, Reading, PA 19610, USA
Alexei Prokudin: Division of Science, Penn State University Berks, Reading, PA 19610, USA

DOI: https://doi.org/10.1016/j.physletb.2017.04.061
Journal volume & issue: Vol. 770, no. C
pp. 242 – 251

Abstract

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We present a new analysis of AN in p↑p→πX within the collinear twist-3 factorization formalism. We incorporate recently derived Lorentz invariance relations into our calculation and focus on input from the kinematical twist-3 functions, which are weighted integrals of transverse momentum dependent (TMD) functions. In particular, we use the latest extractions of the Sivers and Collins functions with TMD evolution to compute certain terms in AN. Consequently, we are able to constrain the remaining contributions from the lesser known dynamical twist-3 correlators.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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