Abstract
New results on the transverse spin azimuthal asymmetries in semi-inclusive DIS reactions extracted by the COMPASS Collaboration from the data collected with a transversely polarised proton target are presented. A noticeable similarity between the Collins asymmetry and the dihadron asymmetry, already been observed and reported, triggered a more deep investigation on the angular correlations and the relevant kinematical variables. The resulting phenomenological analysis of the transversity induced asymmetries, presented in this talk, allows to establish quantitative relationships, providing strong indication that the underlying fragmentation mechanisms are all driven by a common physical process.
Highlights
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The analysis of the data collected by the COMPASS Collaboration during the years 2007 and 2010 by scattering 160 GeV longitudinally polarised positive muons on a transversely polarised proton target (NH3) has provided several interesting measurements on the transverse spin structure of the proton
In particular the year 2010 was fully dedicated to these measurements and COMPASS published precise results on the Collins asymmetries [1] obtained for positive and negative hadrons in SIDIS reactions μp → μ hX and on the di-hadron asymmetry [2] obtained using all the possible pairs formed by one positive and one negative hadron in μp → μ h+h−X
Summary
This content has been downloaded from IOPscience. Please scroll down to see the full text. Ser. 678 012021 (http://iopscience.iop.org/1742-6596/678/1/012021) View the table of contents for this issue, or go to the journal homepage for more. Download details: IP Address: 131.169.4.70 This content was downloaded on 12/06/2016 at 22:49 Please note that terms and conditions apply
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