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Abstract <p>In this article we describe the <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11450_2025_3577_Article_IEq5.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">\(\eta_{c}\)</EquationSource> <!--NuclPhys2570030Saleev-m5--> </InlineEquation> production in proton–proton collisions at small values of the transverse momentum of the charmonium. Soft gluon resummation is used as a TMD factorization approach. At small transverse momenta, the color singlet contribution dominates, allowing us to use <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11450_2025_3577_Article_IEq5.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">\(\eta_{c}\)</EquationSource> <!--NuclPhys2570030Saleev-m6--> </InlineEquation> as a test of the resummation scheme for the noncollinear gluon PDF. The cross sections of <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11450_2025_3577_Article_IEq5.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">\(\eta_{c}\)</EquationSource> <!--NuclPhys2570030Saleev-m7--> </InlineEquation> production at <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11450_2025_3577_Article_IEq8.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="66" /> </InlineMediaObject> <EquationSource Format="TEX">\(\sqrt{s}=27\)</EquationSource> <!--NuclPhys2570030Saleev-m8--> </InlineEquation> GeV, <InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11450_2025_3577_Article_IEq9.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="25" /> </InlineMediaObject> <EquationSource Format="TEX">\(115\)</EquationSource> <!--NuclPhys2570030Saleev-m9--> </InlineEquation> GeV and <InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11450_2025_3577_Article_IEq10.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="18" /> </InlineMediaObject> <EquationSource Format="TEX">\(13\)</EquationSource> <!--NuclPhys2570030Saleev-m10--> </InlineEquation> TeV are predicted.</p>

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Small-\({p}_{{T}}\) Production of \(\eta_{{c}}\) Mesons within the Soft Gluon Resummation Approach

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • V. A. Saleev,
  • K. K. Shilyaev

摘要

Abstract

In this article we describe the \(\eta_{c}\) production in proton–proton collisions at small values of the transverse momentum of the charmonium. Soft gluon resummation is used as a TMD factorization approach. At small transverse momenta, the color singlet contribution dominates, allowing us to use \(\eta_{c}\) as a test of the resummation scheme for the noncollinear gluon PDF. The cross sections of \(\eta_{c}\) production at \(\sqrt{s}=27\) GeV, \(115\) GeV and \(13\) TeV are predicted.