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Measurement of Transverse Spin Dependent Azimuthal Correlations of Charged Pion(s) in p↑p Collisions at √s=200 GeV at STAR
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Journal article
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2022-07-12
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Physics
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http://dx.doi.org/10.21468/scipostphysproc.8.047
Abstract
At the leading twist, the transversity distribution function, hq1(x), where x is the longitudinal momentum fraction of the proton carried by quark q, encodes the transverse spin structure of the nucleon. Extraction of it is difficult because of its chiral-odd nature. In transversely polarized proton-proton collisions (p↑p), hq1(x) can be coupled with another chiral-odd partner, a spin-dependent fragmentation function (FF). The resulting asymmetries in hadron(s) azimuthal correlations directly probe hq1(x). We report the measurement of correlation asymmetries for charged pion(s) in p↑p, through the Collins and the Interference FF channel.
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SciPost Physics Proceedings, Vol. 8
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