scholarly journals Investigation of Pionic Contribution in the Lepton and Antilepton Production Cross Section in p-Cu and p-Pt Collision

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
R. Rostami ◽  
F. Zolfagharpour
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Nucleon Nucleon ◽  
Distribution Functions ◽  
Lepton Production ◽  
Detailed Explanation ◽  
Hadronic Collisions ◽  
Theoretical Results

For detailed explanation of the experimental results of lepton production cross section in hadronic collisions such as nucleon-nucleon or nucleon-nuclei, it is of great importance to use quarks and sea quarks distribution function inside free and bound nucleons. In this paper, the role of pion cloud inside the nucleus in the structure function of Cu and Pt nuclei and the EMC ratio of these nuclei were investigated by using harmonic oscillator model. Then, in the framework of the Drell-Yan process and conventional nuclear theory, GRV’s quarks distribution functions and pionic quarks distribution functions were used to calculate lepton and antilepton production cross section in p-Cu and p-Pt scattering. From the results and based on the mentioned model, by considering pionic contribution, the theoretical results are improved.

Level density model effects on the production cross-section calculations of some medical isotopes via (α, xn) reactions where x = 1–3

2020 ◽  
Vol 35 (24) ◽  
pp. 2050202
Author(s):  
Mert Şekerci ◽  
Hasan Özdoğan ◽  
Abdullah Kaplan
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Nuclear Reactions ◽  
Theoretical Calculations ◽  
Production Cross ◽  
Level Density ◽  
Medical Application ◽  
Density Model ◽  
Level Density Models ◽  
Theoretical Results

Level density models have an undeniable importance for a better perception on the nature of nuclear reactions, which influences our life via various ways. Many novel and advanced medical application use radioisotopes, which are produced with nuclear reactions. By considering the connection between the level density models and the importance of theoretical calculations for the production routes of medically important isotopes, this study is performed to investigate the level density model effects on the production cross-section calculations of [Formula: see text]Zn, [Formula: see text]Ga, [Formula: see text]Kr, [Formula: see text]Pd, [Formula: see text]In, [Formula: see text]I and [Formula: see text]At radioisotopes via some alpha particle induced and neutron emitting reactions. For theoretical calculations; frequently used computation tools, such as TALYS and EMPIRE codes, are applied. Obtained theoretical results are then compared with the experimental data, taken from Experimental Nuclear Reaction Data (EXFOR) library. For a better interpretation of the results, a mean weighted deviation calculation for each investigated reaction is performed in addition to a visual comparison of the graphical representations of the outcomes.

CONSTRAINTS ON NEUTRAL BOSONS OF THESp(6)L⊗U(1)YMODEL

2002 ◽  
Vol 17 (09) ◽  
pp. 1273-1278 ◽  
Author(s):  
ALI A. BAGNEID
Keyword(s):  
Cross Section ◽  
Gauge Boson ◽  
Production Cross Section ◽  
Production Cross ◽  
Hadron Collider ◽  
Branching Ratio ◽  
Direct Search ◽  
Neutral Gauge Boson ◽  
Lower Limits ◽  
Hadronic Collisions

Lower limits are calculated on the mass of an additional neutral gauge boson, Z′, suggested by the Sp (6)L⊗ U (1)Ymodel, using direct search limits at hadron collider. We found that MZ′≥ 655 GeV . The production cross-section times branching ratio of Z′ decaying into dileptons in hadronic collisions, is found to be generation dependent and can be used to distinguish the model.

HEAVY LEPTON PAIR PRODUCTION FROM NEW Z’ RESONANCES

1987 ◽  
Vol 02 (04) ◽  
pp. 1189-1197
Author(s):  
J.L. Hewett ◽  
T.G. Rizzo
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Gauge Boson ◽  
Production Cross Section ◽  
Production Cross ◽  
Lepton Pair ◽  
Lepton Production ◽  
Heavy Lepton ◽  
Neutral Gauge Boson ◽  
Lepton Pair Production

We examine the possibility that heavy lepton pair production can be significantly enhanced by the existence of a new neutral gauge boson, Z’, at SSC energies. We find that in some models, the heavy lepton production cross section resulting from this mechanism exceeds that from production via other scenarios.

scholarly journals Pomeron-Pomeron Scattering

2019 ◽  
Vol 64 (8) ◽  
pp. 760 ◽  
Author(s):  
I. Szanyi ◽  
V. Svintozelskyi
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Forward Direction ◽  
Small Contribution ◽  
Double Diffraction ◽  
Quantum Numbers ◽  
Pomeron Trajectory ◽  
New Feature

The central exclusive diffractive (CED) production of meson resonances potentially is a factory producing new particles, in particular, a glueball. The produced resonances lie on trajectories with vacuum quantum numbers, essentially on the pomeron trajectory. A tower of resonance recurrences, the production cross-section, and the resonances widths are predicted. A new feature is the form of a non-linear pomeron trajectory, producing resonances (glueballs) with increasing widths. At LHC energies, in the nearly forward direction, the t-channel both in elastic, single, or double diffraction dissociations, as well as in CED, is dominated by the pomeron exchange (the role of secondary trajectories is negligible, however a small contribution from the odderon may be present).

scholarly journals STUDIES OF PROPERTIES OF THE η′ MESON AT THE COSY–11 FACILITY

2011 ◽  
Vol 26 (03n04) ◽  
pp. 640-641
Author(s):  
E. CZERWIŃSKI ◽  
J. KLAJA ◽  
P. KLAJA ◽  
P. MOSKAL
Keyword(s):  
Comparative Analysis ◽  
Invariant Mass ◽  
Mass Distribution ◽  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Nucleon Nucleon ◽  
Total Width ◽  
Mass Distributions ◽  
Isospin Dependence

We shortly discuss results on the isospin dependence of the η′ production cross section in nucleon-nucleon collisions, results of comparative analysis of the invariant mass distributions for the pp → ppη′ and pp → ppη reactions, and we present the value of the total width of the η′ meson as derived directly from the mass distribution measured with the mass resolution of 0.3 MeV/c2.

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