scholarly journals Implementation of target mass corrections and higher-twist effects in the xFitter framework

2020 ◽  
Vol 101 (7) ◽  
Author(s):  
Muhammad Goharipour ◽  
S. Rostami
Keyword(s):  
Higher Twist Effects ◽  
Target Mass

scholarly journals PQCD ANALYSIS OF PARTON-HADRON DUALITY

2011 ◽  
Vol 04 ◽  
pp. 190-199 ◽  
Author(s):  
SIMONETTA LIUTI
Keyword(s):  
Resonance Region ◽  
Infrared Region ◽  
Coupling Constant ◽  
Final State ◽  
Higher Twist Effects ◽  
Power Corrections ◽  
Target Mass ◽  
Running Coupling ◽  
Running Coupling Constant ◽  
Bjorken X

We propose an extraction of the running coupling constant of QCD in the infrared region from experimental data on deep inelastic inclusive scattering at Bjorken x → 1. We first attempt a perturbative fit of the data that extends NLO PQCD evolution to large x values and final state invariant mass, W, in the resonance region. We include both target mass corrections and large x resummation effects. These effects are of order [Formula: see text], and they improve the agreement with the Q2dependence of the data. Standard analyses require the presence of additional power corrections, or dynamical higher twists, to achieve a fully quantitative fit. Our analysis, however, is regulated by the value of the strong coupling in the infrared region that enters through large x resummation effects, and that can suppress, or absorb, higher twist effects. Large x data therefore indirectly provide a measurement of this quantity that can be compared to extractions from other observables.

SOME CHARACTERISTICS OF THE COMPOUND MULTIPLICITY IN HIGH-ENERGY NUCLEUS–NUCLEUS INTERACTIONS

2011 ◽  
Vol 20 (08) ◽  
pp. 1735-1754 ◽  
Author(s):  
M. MOHERY ◽  
M. ARAFA
Keyword(s):  
Experimental Data ◽  
Impact Parameter ◽  
Mass Number ◽  
Multiplicity Distribution ◽  
High Energy ◽  
Projectile Nucleus ◽  
Target Mass ◽  
Compound Multiplicity ◽  
Multiplicity Distributions ◽  
The Impact

The present paper deals with the interactions of 22 Ne and 28 Si nuclei at (4.1–4.5)A GeV /c with emulsion. Some characteristics of the compound multiplicity nc given by the sum of the number of shower particles ns and grey particles ng have been investigated. The present experimental data are compared with the corresponding ones calculated according to modified cascade evaporation model (MCEM). The results reveal that the compound multiplicity distributions for these two reactions are consistent with the corresponding ones of MCEM data. It can also be seen that the peak of these distributions shifts towards a higher value of nc with increasing projectile mass. It may further be seen that the compound multiplicity distributions becomes broader with increasing target size and its width increases with the size of the projectile nucleus. In addition, it has been found that the MCEM can describe the compound multiplicity characteristics of the different projectile, target and the correlation between different emitted particles. The values of average compound multiplicity increase with increasing mass of the projectile. Furthermore, it is observed that while the value of 〈nc〉 depends on the mass number of the projectile Ap and the target mass number At, the value of the ratio 〈nc〉/D(nc) seems to be independent of Ap and At. The impact parameter is found to affect the shape of the compound multiplicity distribution. Finally, the dependence of the average compound multiplicity on the numbers of grey and black particles, and the sum of them, is obvious. The values of the slope have been found to be independent of the projectile nucleus.

scholarly journals Parton Distributions,d/u, and Higher Twist Effects at Highx

1999 ◽  
Vol 82 (12) ◽  
pp. 2467-2470 ◽  
Author(s):  
U. K. Yang ◽  
A. Bodek
Keyword(s):  
Higher Twist Effects ◽  
Parton Distributions

Nuclear Temperature and its Dependence on Target Mass in Low Energy Fission

2020 ◽  
Vol 84 (12) ◽  
pp. 1540-1544
Author(s):  
M. N. Andronenko ◽  
L. N. Andronenko ◽  
W. Neubert
Keyword(s):  
Low Energy ◽  
Target Mass ◽  
Nuclear Temperature
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