Influence of gluon behavior on heavy-quark pair production

Abstract

We check the impact of the gluon distribution due to the number of active flavor employed in the calculation of heavy-quark deep-inelastic scattering (DIS) electro-production on the reduced cross section and structure functions determined in the leading order (LO) and next-to-leading order (NLO) quantum chromodynamics (QCD) analysis using the Hadron Electron Ring Accelerator (HERA) combined data. The charm and beauty structure functions are determined and compared with the HERA combined data. The results are in good agreement with respect to the experimental data. We also compare the obtained charm and bottom structure functions with the results from CTEQ6.6 [Phys.Rev.D{\bf78}, 013004(2008)] and NNPDF3.1[Eur.Phys.J.C{\bf77}, 663(2017)] parameterization models. The effect of gluon density on these calculations depends on the number of active flavor at asymptotical values of the momentum transfer $Q^2$. Also, in the HERA kinematic range, the ratio of $F_2^{c\overline{c}}/F_2$ and $F_2^{b\overline{b}}/F_2$ are obtained. These results and comparison with the HERA combined data demonstrate that the suggested method can be applied in analysis of new colliders.

References in corpus (45)

• New parton distributions for collider physics
• Parton distributions from high-precision collider data
• Implications of CTEQ global analysis for collider observables
• Combined Measurement and QCD Analysis of the Inclusive ep Scattering Cross Sections at HERA
• Parton Distribution Functions, ${\alpha }_s$ and Heavy-Quark Masses for LHC Run II
• Measurement of the neutral current cross section and F2 structure function for deep inelastic e+p scattering at HERA
• Impact of Heavy Quark Masses on Parton Distributions and LHC Phenomenology
• Parton distribution functions and benchmark cross sections at NNLO
• Heavy quarks in deep-inelastic scattering
• The 3-, 4-, and 5-flavor NNLO Parton from Deep-Inelastic-Scattering Data and at Hadron Colliders
• A Variable-Flavour Number Scheme for NNLO
• Rates for Inclusive Deep-Inelastic Electroproduction of Charm Quarks at HERA
• Measurement of the Proton Structure Function F_2 at Very Low Q^2 at HERA
• Heavy-quark mass dependence in global PDF analyses and 3- and 4-flavour parton distributions
• Effect of changes of variable flavor number scheme on parton distribution functions and predicted cross sections
• Inclusive $D^0$ and $D^{\ast }\pm$ Production in Deep Inelastic $ep$ Collisions at HERA
• Heavy-quark deep-inelastic scattering with a running mass
• The Longitudinal Heavy Quark Structure Function F_{L}^{Q\bar{Q}} in the Region Q^2 \gg m^2 at O(α_s^3)
• Connection of the virtual ${\gamma }^{\ast }p$ cross section of $ep$ deep inelastic scattering to real $\gamma p$ scattering, and the implications for $\nu N$ and $ep$ total cross sections
• On the role of heavy flavor parton distributions at high energy colliders
• Measurement of beauty and charm production in deep inelastic scattering at HERA and measurement of the beauty-quark mass
• The contribution of off-shell gluons to the structure functions F_2^c and F_L^c$ and the unintegrated gluon distributions
• The color dipole BFKL-Regge expansion: from DIS on protons to pions to rise of hadronic cross sections
• Analytic Expression for the Joint x and Q^2 Dependences of the Structure Functions of Deep Inelastic Scattering
• Inclusive diffraction in future electron-proton and electron-ion colliders
• Heavy-quark contributions to the ratio F_L/F_2 at low x
• The Variable Flavor Number Scheme at Next-to-Leading Order
• The Ratio $R=F_L/F_T$ in DIS as a Probe of the Charm Content of the Proton
• How open charm production and scaling violations probe the rightmost hard BFKL pole exchange
• On the Perturbative Stability of the QCD Predictions for the Ratio $R=F_L/F_T$ in Heavy-Quark Leptoproduction
• Phenomenology of diffractive DIS in the framework of fracture functions and determination of diffractive parton distribution functions
• The BFKL-Regge factorization and $F_2^b$, $F_2^c$, $F_L$ at HERA: physics implications of nodal properties of the BFKL eigenfunctions
• F2c at low x
• Beauty, charm and $F_L$ at HERA: new data vs. early predictions
• The Role of Different Schemes in the QCD Analysis and Determination of the Strong Coupling
• The ratio of the beauty structure functions $R^b=F_L^b/F_2^b$ at low x
• The predictions of the charm structure function exponents behaviour at low x in deep inelastic scattering
• Phenomenology of leading nucleon production in $ep$ collisions at HERA in the framework of fracture functions
• Effects of next-to-leading order DGLAP evolution on generalized parton distributions of the proton and deeply virtual Compton scattering at high energy
• Geometrical scaling in charm structure function ratios
• NLO corrections to the hard pomeron behavior of the charm structure functions $F_k^c(k=2,L)$ at low x
• The Ratio of the Charm Structure Functions $F_k^c(k=2,L)$ at Low x in Deep Inelastic Scattering with Respect to the Expansion Method
• Running heavy-quark masses in DIS
• The behavior of the heavy-quarks structure functions at small-$x$
• Future Deep Inelastic Scattering with the LHeC

Cited by in corpus (4)

• Effect of the parameterization of the distribution functions on the longitudinal structure function at small $x$
• Heavy quark structure functions from unifying the color dipole picture and double asymptotic scaling approaches
• Collinear approach for top quark production at ep colliders
• Geometrical scaling of heavy-quark contributions in the low $x$ region