Longitudinal structure function from logarithmic slopes of 
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 at low 
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Boroun, G. R.

doi:10.1103/physrevc.97.015206

Cited by 21 publications

(6 citation statements)

References 35 publications

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“…Parton distribution functions (PDFs) extracted from global QCD fits of deep inelastic electron proton (ep) scattering at HERA as well as proton-(anti)proton (pp) collision at hadron colliders such as LHC, are a fundamental input into hadron collider physics and has been very important in the investigation of the partonic structure of the nucleon, (see [1][2][3][4] for a recent review and [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] for recent determination of different types of PDFs). Much effort also have been made by theoretical and experimental particle physics communities to improve our understanding on the partonic structure of the nucleon and nuclei [2,[22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41]. These studies mostly include the the potential of recent measurements at high energy collider to better constrain our present knowledge of the PDFs and the importance or resulting PDFs for predictions of processes at the LHC and possible future high energy and high luminosity lepton and hadron colliders.…”

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confidence: 99%

First QCD analysis of charged hadron fragmentation functions and their uncertainties at next-to-next-to-leading order

2018

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In this paper, we present SGK18 FFs, a first global QCD analysis of parton-to-unidentified charged hadrons fragmentation functions (FFs) at next-to-next-to-leading order (NNLO) accuracy in perturbative QCD. This analysis is based on single-inclusive charged hadron production in electronpositron (e − e + ) annihilation. The uncertainties in the extraction of SGK18 FFs as well as the corresponding observables are estimated using the "Hessian" technique. We study the quality of the SGK18 FFs determined in this analysis by comparing with the recent results in literature. We also show how SGK18 FFs results describe the available data for single-inclusive unidentified charged hadron production in e − e + annihilation. We demonstrate that the theoretical uncertainties due to the variation of the renormalization and factorization scales improve when NNLO QCD corrections are considered. We find that the resulting SGK18 FFs are in good agreement with all data analyzed and the inclusion of NNLO corrections tends to improve the data description with somewhat smaller uncertainty.

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confidence: 99%

First QCD analysis of charged hadron fragmentation functions and their uncertainties at next-to-next-to-leading order

2018

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“…with e 2 i = 4/9 (1/9) for up (down) type quarks, where the parton densities are readily available through the LHAPDF 6 library interface [20]. The longitudinal structure function F L can be related to gluon densities within pQCD, an interesting topic also algorithmically, for a recent work see [17].…”

Section: Photon-photon Interactionsmentioning

confidence: 99%

GRANIITTI: A Monte Carlo Event Generator for High Energy Diffraction

Mieskolainen¹

2019

Preprint

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We describe the physics and computational power of Graniitti Monte Carlo event generator, a new fully multithreaded engine designed for high energy diffraction, written in modern C++. The emphasis is especially on the lowmass domain of central exclusive processes of the S-matrix, where exotic QCD phenomena such as glueballs are expected and holographic dualities with gravity may be tested. The generator includes photon-photon, photon-pomeron, pomeron-pomeron, Durham QCD model and Tensor pomeron model type scattering amplitudes and advanced spin analysis tools. The generator combines a full parametric resonance spectrum with continuum interference and forward + central spin correlations together with event-by-event eikonal screening loop and forward proton excitation kinematics. We demonstrate the state-of-the-art capabilities and show how the enigmatic 'glueball filter' observable is driven by spin polarization.

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“…at high-order corrections [7]. In pQCD, the Altarelli-Martinelli equation for longitudinal structure function in terms of coefficient functions is given by [8][9] gluonic term :…”

Section: Introductionmentioning

confidence: 99%

The exponent of the longitudinal structure function $$F_{\text {L}}$$ at low x

Boroun

2020

Eur. Phys. J. Plus

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We present a set of formula to extract exponents of the longitudinal structure function and reduced cross section from the Regge-like behavior at small x. The exponents are found to be independent of Q 2 at NNLO analysis. As a result, we show that the reduced cross section exponents do not have the same behavior at some values of x. This difference predicts the non-linear effects and some evidence for shadowing and antishadowing at LHeC. Also the ratio F 2 σ is calculated and compared with the corresponding HERA data. Our calculations show a very good agreement with the DIS experimental data throughout the small values of x.

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Longitudinal structure function from logarithmic slopes of F2 at low x

Cited by 21 publications

References 35 publications

First QCD analysis of charged hadron fragmentation functions and their uncertainties at next-to-next-to-leading order

First QCD analysis of charged hadron fragmentation functions and their uncertainties at next-to-next-to-leading order

GRANIITTI: A Monte Carlo Event Generator for High Energy Diffraction

The exponent of the longitudinal structure function $$F_{\text {L}}$$ at low x

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