Proton-proton and proton-deuteron elastic scattering experiments at N. A. L

1973 ◽  
Vol 335 (1603) ◽  
pp. 453-460
Keyword(s):  
Elastic Scattering ◽  
Momentum Transfer ◽  
Energy Dependence ◽  
Cross Sections ◽  
Differential Cross ◽  
Scattering Amplitude ◽  
Proton Proton ◽  
The Real ◽  
Diffraction Region ◽  
Momentum Transfer Range

Differential cross-sections for p-p and p-d elastic scattering have been measured at N. A. L. for 80 < s < 600 GeV 2 in the four-momentum transfer range 0.001 < | t | < 0.15 (GeV/ c ) 2 . Preliminary values are given for the slope parameters in the diffraction region and for the ratio of the real to the imaginary scattering amplitude. The energy dependence of these parameters is discussed.

scholarly journals Anomaly in the differential cross sections at 13 TeV

2021 ◽  
pp. 2150148
Author(s):  
O. V. Selyugin
Keyword(s):  
Elastic Scattering ◽  
Momentum Transfer ◽  
Cross Sections ◽  
Differential Cross ◽  
Scattering Amplitude ◽  
Small Momentum Transfer ◽  
Small Momentum ◽  
Transfer Region ◽  
Elastic Scattering Amplitude ◽  
Unusual Phenomenon

The analysis of the new TOTEM data at 13 TeV in a wide momentum transfer region reveals the unusual phenomenon — the presence in the elastic scattering amplitude of a term with a very large slope that is responsible for the behavior of hadron scattering at a very small momentum transfer. This term can be connected with hadron interactions at large distances.

An experimental investigation of small angle photon elastic scattering

1979 ◽  
Vol 57 (3) ◽  
pp. 343-352 ◽  
Author(s):  
N. Ramanathan ◽  
T. J. Kennett ◽  
W. V. Prestwich
Keyword(s):  
Experimental Investigation ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Small Angle ◽  
Differential Cross ◽  
Bound States ◽  
Scattering Amplitude ◽  
Form Factors ◽  
Differential Cross Sections

The differential cross sections for photon elastic scattering have been determined for targets of Cu, Cd, Ta, and Pb, at angles of 2.4, 3.5, 5.1., 6.0, 8.0, and 10.0° and incident energies of 244.7, 344.3, 443.9, 778.9, 964.0, 1085.8, 1112.0, 1274.2, and 1408.0 keV. The data indicate that presently calculated form factors may be too large, and suggest that intermediate bound states may influence the scattering amplitude.

Airy minima in 4He +28Si elastic and inelastic scattering

2020 ◽  
Vol 35 (19) ◽  
pp. 2050159
Author(s):  
Yu. A. Berezhnoy ◽  
A. S. Molev
Keyword(s):  
Elastic Scattering ◽  
Inelastic Scattering ◽  
Energy Dependence ◽  
Cross Sections ◽  
Differential Cross ◽  
Second Order ◽  
Differential Cross Sections ◽  
First Order ◽  
Elastic And Inelastic Scattering ◽  
Matrix Description

We present the results of the [Formula: see text]-matrix description of the [Formula: see text] elastic and inelastic scattering differential cross-sections between 40 and 240 MeV with allocation of Airy minima of various orders. The first-order Airy minima have been unambiguously identified in the differential cross-sections for elastic scattering and inelastic scattering to the first [Formula: see text] state of [Formula: see text] at energies [Formula: see text] MeV, and the second-order Airy minima — at [Formula: see text] MeV. The angular positions of these minima obey an inverse dependence on energy. The intensities of nuclear refraction and absorption also obey the same energy dependence.

The effect of breakup of 6Li on elastic scattering and fusion with 28Si at near barrier energies

2016 ◽  
Vol 25 (01) ◽  
pp. 1650003 ◽  
Author(s):  
Mandira Sinha ◽  
Subinit Roy ◽  
P. Basu ◽  
H. Majumdar
Keyword(s):  
Elastic Scattering ◽  
Energy Dependence ◽  
Cross Sections ◽  
Model Potential ◽  
Angular Distributions ◽  
The Real ◽  
Optical Model Potential ◽  
Coupled Channel ◽  
Potential Parameters ◽  
Existing Data

Elastic scattering angular distributions for 6Li+[Formula: see text]Si system were measured at [Formula: see text] and analyzed along with the existing data from the previous measurements in the energy range of [Formula: see text]. The measured cross-sections and the existing data, forming a set of angular distributions over a range of E/[Formula: see text], were analyzed using the phenomenological optical model potential (OMP). Three different sets of potential parameters were used. The energy dependence of the real and the imaginary potential strengths were, subsequently, extracted at the radius of sensitivity ([Formula: see text]) for the system. Continuum Discretized Coupled Channel (CDCC) calculation was performed to explore the contribution of projectile break-up (BU) on the observed energy dependence of the effective potential for elastic scattering of 6Li from [Formula: see text]Si. The energy variation of the strength of the real potential with continuum coupling was found to agree with the energy dependence of the same extracted from the (OMP) analysis at energies around the barrier. But the behavior of the imaginary strength appeared to be different. The calculated fusion cross-sections, including the effect of BU, clearly overestimated the measured fusion excitation function data in the below and near barrier energies but compared well with the data at higher energies.

scholarly journals Observation of Odderon effects at LHC energies: a real extended Bialas–Bzdak model study

2021 ◽  
Vol 81 (7) ◽  
Author(s):  
T. Csörgő ◽  
I. Szanyi
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Scattering Amplitude ◽  
Proton Collision ◽  
Differential Cross Sections ◽  
Proton Antiproton ◽  
Proton Proton ◽  
Elastic Proton

AbstractThe unitarily extended Bialas–Bzdak model of elastic proton–proton scattering is applied, without modifications, to describe the differential cross-section of elastic proton–antiproton collisions in the TeV energy range, and to extrapolate these differential cross-sections to LHC energies. In this model-dependent study we find that the differential cross-sections of elastic proton–proton collision data at 2.76 and 7 TeV energies differ significantly from the differential cross-section of elastic proton–antiproton collisions extrapolated to these energies. The elastic proton–proton differential cross-sections, extrapolated to 1.96 TeV energy with the help of this extended Bialas–Bzdak model do not differ significantly from that of elastic proton–antiproton collisions, within the theoretical errors of the extrapolation. Taken together these results provide a model-dependent, but statistically significant evidence for a crossing-odd component of the elastic scattering amplitude at the at least 7.08 sigma level. From the reconstructed Odderon and Pomeron amplitudes, we determine the $$\sqrt{s}$$ s dependence of the corresponding total and differential cross-sections.

Differential elastic electron scattering

1996 ◽  
Vol 74 (7-8) ◽  
pp. 461-467 ◽  
Author(s):  
Albert Crowe ◽  
Danica Cvejanović
Keyword(s):  
Elastic Scattering ◽  
Energy Dependence ◽  
Electron Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Rare Gas ◽  
Differential Cross Sections ◽  
Elastic Electron ◽  
Elastic Electron Scattering ◽  
Positron Scattering

We present the energy dependence of electron–argon and electron–krypton differential cross sections for elastic scattering, discuss their general characteristics, and compare them with existing equivalent data on positron scattering. The present measurements were stimulated by corresponding positron–heavy rare-gas-atom results. Our first aim is to provide a set of data that can be directly compared with the data on positron scattering and hence possibly contribute to the understanding of structures in that data.

Multipomeron theory in the Gribov approach

2016 ◽  
Vol 31 (28n29) ◽  
pp. 1645013
Author(s):  
V. A. Abramovsky ◽  
N. V. Abramovskaya ◽  
N. V. Evstigneeva
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Imaginary Part ◽  
Cross Sections ◽  
Energy Region ◽  
Scattering Amplitude ◽  
The Real ◽  
Elastic Scattering Amplitude

Pomeron and non vacuum reggeon parameters which reasonably describe total and elastic cross sections are obtained. The ratio of the real and imaginary part of the forward elastic scattering amplitude is calculated with these parameters and it coincides with the experimental data in the whole energy region. The shower enhancement coefficient in the quasi-eikonal approach appears to be less than unity which corresponds to the definite distribution of parton showers in incident hadrons.

scholarly journals THE EFFECTS OF THE SMALL-t PROPERTIES OF HADRONIC SCATTERING AMPLITUDE ON THE DETERMINATION OF ITS REAL PART

2012 ◽  
Vol 27 (20) ◽  
pp. 1250113 ◽  
Author(s):  
O. V. SELYUGIN
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Scattering Amplitude ◽  
Differential Cross Sections ◽  
Small Momentum Transfer ◽  
Proton Elastic Scattering ◽  
Spin Flip ◽  
The Impact

Taking into account the different forms of the Coulomb-hadron interference phase and the possible spin-flip contribution the new analysis of the experimental data of the proton–antiproton elastic scattering at 3.8<pL<6.0 GeV/c and small momentum transfer is carried out. It is shown that the size of the spin-flip amplitude can be determined from the form of the differential cross-sections at small-t, and the deviation of ρ(s, t) obtained from the examined experimental data of the [Formula: see text] scattering from the analysis1, based on the dispersion relations, is conserved in all examined assumptions. The analysis of the proton–proton elastic scattering at 9<pL<70 GeV/c also shows the impact of the examined effects on the form of the differential cross-sections.

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