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arXiv · 1611.05974

Linearly polarized gluons in charmonium and bottomonium production in color octet model

Asmita Mukherjee·Sangem Rajesh
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Abstract

We study the possibility to probe the unpolarized and linearly polarized transverse momentum- dependent gluon distributions in unpolarized pp collision in charmonium and bottomonium produc- tion, employing non-relativistic QCD (NRQCD) based color octet model within transverse momentum dependent (TMD) factorization framework. The transverse momentum (p T ) and rapidity distributions of J/{\psi} and {\Upsilon}(1S) at LHCb, RHIC and AFTER energies are estimated. Significant modulations in transverse momentum spectrum of quarkonium in the low p T region is obtained when contributions of linearly polarized gluons inside an unpolarized proton are taken into account. The results of quarko- nium production in color octet model and color evaporation model are compared.

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Asmita Mukherjee, Sangem Rajesh. 2016-11-18. Linearly polarized gluons in charmonium and bottomonium production in color octet model. https://doi.org/10.1103/physrevd.95.034039

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