# JPS IFF Proceedings (SPIN 2021)

**Details**

**Conference**

Proceedings of the 24th International Spin Symposium (SPIN2021)

JPS Conference Proceedings

**Title
** Measurement of Transverse Spin Dependent Azimuthal Correlations of \(\pi ^{ + }\pi ^{ - }\) in \(p^{ \uparrow }p\) Collisions at \(\sqrt{s} = 200\) GeV at STAR

**Abstract
** At the leading twist, the transversity distribution function, \(h_{1}^{q}(x)\), where x is the longitudinal momentum fraction of the proton carried by quark q, encodes the transverse spin structure of the nucleon. Extraction of \(h_{1}^{q}(x)\) is difficult because of its chiral-odd nature. In transversely polarized proton–proton collisions (\(p^{ \uparrow }p\)), \(h_{1}^{q}(x)\) 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 \ (h_{1}^{q} (x)\). We report the measurement of di-pion (\(\pi ^{ + }\pi ^{ - }\)) correlation asymmetries in \(p^{ \uparrow }p\), which is sensitive to the valence quark transversity.

**Author(s)**

**https://doi.org/10.7566/JPSCP.37.020121**

** ****eISBN**

489027-150-3

**BibTex Citation
**

**@inbook{doi:10.7566/JPSCP.37.020121,**

author = { Babu Pokhrel},

title = {Measurement of Transverse Spin Dependent Azimuthal Correlations of <inline-formula><tex-math version="MathJax" xml:space="preserve">\(\pi ^{ + }\pi ^{ - }\)</tex-math></inline-formula> in <inline-formula><tex-math version="MathJax" xml:space="preserve">\(p^{ \uparrow }p\) </tex-math></inline-formula> Collisions at <inline-formula><tex-math version="MathJax" xml:space="preserve">\(\sqrt{s} = 200\) </tex- math> </inline- formula> GeV at STAR},

booktitle = {Proceedings of the 24th International Spin Symposium (SPIN2021)},

chapter = {},

pages = {},

doi = {10.7566/JPSCP.37.020121},

URL = {https://journals.jps.jp/doi/abs/10.7566/JPSCP.37.020121},

eprint = {https://journals.jps.jp/doi/pdf/10.7566/JPSCP.37.020121} }

author = { Babu Pokhrel},

title = {Measurement of Transverse Spin Dependent Azimuthal Correlations of <inline-formula><tex-math version="MathJax" xml:space="preserve">\(\pi ^{ + }\pi ^{ - }\)</tex-math></inline-formula> in <inline-formula><tex-math version="MathJax" xml:space="preserve">\(p^{ \uparrow }p\) </tex-math></inline-formula> Collisions at <inline-formula><tex-math version="MathJax" xml:space="preserve">\(\sqrt{s} = 200\) </tex- math> </inline- formula> GeV at STAR},

booktitle = {Proceedings of the 24th International Spin Symposium (SPIN2021)},

chapter = {},

pages = {},

doi = {10.7566/JPSCP.37.020121},

URL = {https://journals.jps.jp/doi/abs/10.7566/JPSCP.37.020121},

eprint = {https://journals.jps.jp/doi/pdf/10.7566/JPSCP.37.020121} }

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