Azimuthal Asymmetry and Ratio $R= F_L / F_T$ as Probes of the Charm Content of the Proton
| Autor: | Ivanov, N. Ya. |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | J.Contemp.Phys. 47 (2012) 47-52 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3103/S1068337212020016 |
| Popis: | We study two experimental ways to measure the heavy-quark content of the proton: using the Callan-Gross ratio $R(x,Q^2)=F_L/F_T$ and/or azimuthal $\cos(2\varphi)$ asymmetry in deep inelastic lepton-nucleon scattering. Our approach is based on the perturbative stability of the QCD predictions for these two quantities. We resume the mass logarithms of the type $\alpha_{s}\ln\left( Q^{2}/m^{2}\right)$ and conclude that heavy-quark densities in the nucleon can, in principle, be determined from data on the Callan-Gross ratio and/or azimuthal asymmetry. In particular, the charm content of the proton can be measured in future studies at the proposed Large Hadron-Electron (LHeC) and Electron-Ion (EIC) Colliders. Comment: 6 pages, 4 figures, revtex. arXiv admin note: substantial text overlap with arXiv:1010.5424, arXiv:1212.3785, arXiv:0812.0722 |
| Databáze: | arXiv |
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