QCD ANALYSIS OF DEEP INELASTIC LEPTON-NUCLEON SCATTERING DATA

1992 ◽  
Vol 07 (25) ◽  
pp. 2307-2315
Author(s):  
S. I. BILENKAYA ◽  
D. B. STAMENOV
Keyword(s):  
Cross Section ◽  
Scale Parameter ◽  
Structure Functions ◽  
Mass Scale ◽  
Scattering Data ◽  
Nucleon Structure ◽  
Leading Order ◽  
Parton Distributions ◽  
Qcd Analysis ◽  
Good Agreement

A combined next-to-leading order QCD analysis of BCDMS µ H 2 ( D 2) and CDHS [Formula: see text] scattering data is presented. The nucleon structure functions are given in terms of parton distributions. Unlike most of the papers on this subject, the cross-section scattering data (not the values for the nucleon structure functions extracted from these data by additional extrapolations and assumptions) are fitted. A very good agreement of the data with the predictions of QCD for the parton distributions is observed. The QCD mass scale parameter Λ is determined from these data both in a flavor nonsinglet approximation and with a complete flavor singlet and non-singlet treatment. These two fits to the data give consistent results for Λ.

Next-to-leading-order QCD analysis of structure functions with the help of Jacobi polynomials

1990 ◽  
Vol 48 (2) ◽  
pp. 347-353 ◽  
Author(s):  
V. G. Krivokhizhin ◽  
S. P. Kurlovich ◽  
R. Lednicky ◽  
S. Nemecek ◽  
V. V. Sanadze ◽  
...  
Keyword(s):  
Jacobi Polynomials ◽  
Structure Functions ◽  
Leading Order ◽  
Qcd Analysis

H1 INCLUSIVE CROSS-SECTION MEASUREMENTS AND AN EXTRACTION OF PARTON DISTRIBUTION FUNCTIONS

2005 ◽  
Vol 20 (21) ◽  
pp. 1557-1571
Author(s):  
BURKARD REISERT
Keyword(s):  
Cross Section ◽  
Parton Distribution ◽  
Inclusive Cross Section ◽  
Distribution Functions ◽  
Parton Distribution Functions ◽  
Single Experiment ◽  
Parton Distributions ◽  
The Standard Model ◽  
Qcd Analysis

An extraction of the parton distributions of the proton by a next-to-leading order QCD fit in the framework of the Standard Model is presented. The fit implements a novel decomposition of the quark species into up- and down-type quark distributions, which is the key to enable a determination of flavor separated parton distributions from a single experiment. The fit is performed on the inclusive unpolarized neutral and charged current cross-section measurements by the H1 collaboration at HERA. The discussion of uncertainties of parton distribution functions is based upon but extends the QCD analysis published together with the H1 data.

scholarly journals DEEP INELASTIC NEUTRINO INTERACTIONS

2005 ◽  
Vol 20 (19) ◽  
pp. 4664-4669
Author(s):  
MARY HALL RENO
Keyword(s):  
Cross Section ◽  
Leading Order ◽  
Weak Mixing Angle ◽  
Weak Mixing ◽  
Parton Distributions ◽  
Mixing Angle ◽  
Neutrino Interactions ◽  
Isospin Violation

Next-to-leading order QCD corrections, order 1 GeV mass corrections and the role of a strangeness asymmetry and isospin violation in the x dependence of parton distributions are evaluated in the context of the neutrino-nucleon cross section. Their contributions to evaluations of the weak mixing angle using the Paschos-Wolfenstein relation are discussed.

Prediction of rms charge radius of proton using proton-proton elastic scattering data at TeV

2021 ◽  
Vol 67 (3 May-Jun) ◽  
pp. 491
Author(s):  
S. Zahra ◽  
B. Shafaq
Keyword(s):  
Experimental Data ◽  
Form Factor ◽  
Elastic Scattering ◽  
Cross Section ◽  
Charge Radius ◽  
Scattering Data ◽  
Proton Proton ◽  
Proton Elastic Scattering ◽  
Predicted Values ◽  
Good Agreement

Using  proton–proton elastic scattering data  at  TeV and squared four-momentum transfer 0.36 < -t <  0.76 (GeV/c)2 for 13 σBeam distance  and  0.07 < -t <  0.46 (GeV/c)2 for 4.3 σBeam distance, form factor of proton is predicted. Simplest version of Chou–Yang model is employed to extract the form factor by fitting experimental data of differential cross section from TOTEM experiment (for 13σBeamand 4.3 σBeam distance) to a single Gaussian. Root mean square (rms) charge radius of proton is calculated using this form factor.  It is found to be equal to 0.91 fm and 0.90 fm respectively. Which is in good agreement with experimental data and theoretically predicted values.

scholarly journals ONCE MORE ON THE RADIATIVE CORRECTIONS TO THE NUCLEON STRUCTURE FUNCTIONS IN QCD

1995 ◽  
Vol 10 (27) ◽  
pp. 2029-2039 ◽  
Author(s):  
D.B. STAMENOV
Keyword(s):  
Structure Functions ◽  
Nucleon Structure ◽  
Radiative Corrections ◽  
Parton Distributions ◽  
Logarithmic Approximation

A new representation of the next-to-leading QCD corrections to the nucleon structure functions is given in terms of parton distributions. All O(αs) corrections to the leading logarithmic approximation (LLA) are included. In contrast to the similar representations in the literature terms of order [Formula: see text] do not appear in our expressions for the nucleon structure functions taken in the next-to-leading logarithmic approximation. This result is generalized for any order in αs beyond the LLA. Terms of order [Formula: see text] which belong only to the approximation considered are present in such a representation for the structure functions.

scholarly journals Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method

2022 ◽  
Vol 82 (1) ◽  
Author(s):  
M. I. Abdulhamid ◽  
M. A. Al-Mashad ◽  
A. Bermudez Martinez ◽  
G. Bonomelli ◽  
I. Bubanja ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Cross Section ◽  
Parton Shower ◽  
Good Description ◽  
Leading Order ◽  
High Transverse Momentum ◽  
Azimuthal Correlation ◽  
Azimuthal Correlations ◽  
The Matrix ◽  
Good Agreement

AbstractThe azimuthal correlation, $$\Delta \phi _{12}$$ Δ ϕ 12 , of high transverse momentum jets in pp collisions at $$\sqrt{s}=13$$ s = 13  TeV is studied by applying PB-TMD distributions to NLO calculations via MCatNLO together with the PB-TMD parton shower. A very good description of the cross section as a function of $$\Delta \phi _{12}$$ Δ ϕ 12 is observed. In the back-to-back region of $${\Delta \phi _{12}}\rightarrow \pi $$ Δ ϕ 12 → π , a very good agreement is observed with the PB-TMD Set 2 distributions while significant deviations are obtained with the PB-TMD Set 1 distributions. Set 1 uses the evolution scale while Set 2 uses transverse momentum as an argument in $$\alpha _\mathrm {s}$$ α s , and the above observation therefore confirms the importance of an appropriate soft-gluon coupling in angular ordered parton evolution. The total uncertainties of the predictions are dominated by the scale uncertainties of the matrix element, while the uncertainties coming from the PB-TMDs and the corresponding PB-TMD shower are very small. The $$\Delta \phi _{12}$$ Δ ϕ 12 measurements are also compared with predictions using MCatNLO together Pythia8, illustrating the importance of details of the parton shower evolution.

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