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Exploring universality of transversity in proton-proton collisions

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arxiv 1604.06585 v1 pith:2BLAKJBC submitted 2016-04-22 hep-ph hep-exnucl-exnucl-th

Marco Radici , Alessandro M. Ricci , Alessandro Bacchetta , Asmita Mukherjee This is my paper
classification hep-phhep-exnucl-exnucl-th
keywords collisionsproton-protontransversitychargedchiral-oddcorrelationsfragmentationfunction
verification ladder T0 review T1 audit T2 compute T3 formal
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We consider the azimuthal correlations of charged hadron pairs with large total transverse momentum and small relative momentum, produced in proton-proton collisions with one transversely polarized proton. One of these correlations directly probes the chiral-odd transversity parton distribution in connection with a chiral-odd interference fragmentation function. We present predictions for this observable based on previous extractions of transversity (from charged pion pair production in semi-inclusive deep-inelastic scattering) and of the interference fragmentation function (from the production of back-to-back charged pion pairs in electron-positron annihilations). All analyses are performed in the framework of collinear factorization. We compare our predictions to the recent data on proton-proton collisions released by the STAR collaboration at RHIC, and we find them reasonably compatible. This comparison confirms for the first time the predicted role of transversity in proton-proton collisions and it allows to test its universality.

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Cited by 2 Pith papers

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  1. Single spin asymmetry $A _ { U L } ^ { \sin ( 3 \phi _ { h } - \phi_{ R } ) }$ in dihadron production in SIDIS

    hep-ph 2025-09 conditional novelty 6.0 of 10

    A one-loop spectator-model calculation of the previously uncalculated T-odd dihadron fragmentation function predicts a near-zero sin(3phi_h-phi_R) asymmetry at COMPASS and HERMES, matching the weak observed signal.

  2. Impact of Future Dihadron Production Measurements on the Transversity Distributions and Tensor Charges of the Nucleon

    hep-ph 2026-05 unverdicted novelty 4.0 of 10

    Pseudo-data from CLAS12, SoLID, and ePIC experiments are incorporated into the JAMDiFF analysis to forecast reduced uncertainties on transversity PDFs at intermediate-to-large x from JLab and across all x from EIC, pl...

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