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Measurement of Transverse Spin Dependent Azimuthal Correlations of π+π− in p↑p Collisions at s√=200 GeV at STAR
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Conference proceeding
Date
2022-01-15
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Physics
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http://dx.doi.org/10.7566/jpscp.37.020121
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 hq1(x) 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 azimuthal correlations of di-hadron pairs directly probe hq1(x). We report the measurement of di-pion (π+π−) correlation asymmetries in p↑p, which is sensitive to the valence quark transversity.
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Measurement of Transverse Spin Dependent Azimuthal Correlations of \(\pi ^{ + }\pi ^{ - }\) in \(p^{ \uparrow }p\) Collisions at \(\sqrt{s} = 200\) GeV at STAR Babu Pokhrel Proceedings of the 24th International Spin Symposium (SPIN2021), 10.7566/JPSCP.37.020121
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Journal of the Physical Society of Japan
Has part
JPS Conference Proceedings, Proceedings of the 24th International Spin Symposium (SPIN2021), Vol. 37
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