Differential cross sections in a thick brane world scenario

2018 ◽  
Vol 96 (2) ◽  
pp. 183-188
Author(s):  
R. Arceo ◽  
Omar Pedraza ◽  
L.A. López ◽  
Ariel Flores-Rosas ◽  
G. León-Soto
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Brane World ◽  
Length Scale ◽  
Electromagnetic Potential ◽  
Low Energies ◽  
Elastic Differential Cross Section ◽  
Kaluza Klein

The elastic differential cross section is calculated at low energies for the elements 3He, 20Ne, 40Ar, 14N, 12C, and for 208Pb using an effective 4D electromagnetic potential coming from the contribution of the massive Kaluza–Klein modes of the 5D vector field in a thick brane scenario. The length scale is adjusted in the potential to compare with known experimental data and to set bounds for the parameter of the model.

Elastic total cross-sections in an RSIIp scenario

2016 ◽  
Vol 25 (10) ◽  
pp. 1650084 ◽  
Author(s):  
R. Arceo ◽  
Omar Pedraza ◽  
L. A. López ◽  
L. Valencia-Palomo ◽  
E. González-Espinosa ◽  
...  
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Cross Sections ◽  
Extra Dimensions ◽  
Length Scale ◽  
Electromagnetic Potential ◽  
Total Cross Sections

The total elastic nucleon–nucleus cross-section is calculated at energies up to 600 MeV for the elements [Formula: see text]C, [Formula: see text]Pb, [Formula: see text]O, 9Be, 4He, 2H, [Formula: see text]U and [Formula: see text]Al using a finite electromagnetic potential, which is obtained considering a Randall–Sundrum II scenario modified by the inclusion of [Formula: see text] compact extra dimensions. The length scale bound is set in the potential to compare with known experimental data.

scholarly journals Differential cross-section measurements for the 7Li(p,p0)7Li, 7Li(p,p1)7Li, 7Li(p,α0)4He, 19F(p,p0)19F, 19F(p,α0)16O and 19F(p,α1,2)16O reactions

2012 ◽  
Vol 20 ◽  
pp. 89
Author(s):  
V. Paneta ◽  
A. Lagoyannis ◽  
A. Kafkarkou ◽  
M. Kokkoris
Keyword(s):  
Experimental Data ◽  
Differential Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Differential Cross Sections ◽  
Variable Energy

Differential cross sections of the 7Li(p,p0)7Li, 7Li(p,p1)7Li, 7Li(p,α0)4He, 19F(p,p0), 19F(p,α0)16O and 19F(p,α1,2)16O reactions have been determined for proton energies Elab=1500-7000 keV, using a variable energy step and for detection angles between 140-170 degrees in steps of 10 degrees. To validate the obtained results, benchmarking measurements were performed, using thick and mirror-polished BaF2 and LiF targets. The experimental data are compared to data from literature, when available, and similarities and discrepancies are presented and analyzed.

Scattering of Ions VI. Elastic Scattering of N+ on Ne, Ar, Kr, and Xe

1974 ◽  
Vol 29 (8) ◽  
pp. 1143-1151 ◽  
Author(s):  
H.-P. Weise ◽  
H.-U. Mittmann
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Rare Gas ◽  
Single Group ◽  
Potential Depth ◽  
Different Types ◽  
Elastic Differential Cross Section

In the elastic differential cross-section of the N+-rare gas systems two different types of oscillations have been observed. At an energy of a few eV a primary rainbow was detected for all systems. In the case of N+ - Ar, secondary rainbows were resolved too. From these experimental data the potential depths were determined to be: ε (N+ - Ne) = 0.4 eV, ε (N+ - Kr) = 0.29 eV, ε(N+ - Xe) = 0.92 eV. For the system N+ - Ar the shape of the reduced potential was obtained by evaluating the positions of the secondary rainbow extrema. The potential depth was found to be 2.16 eV. At higher energies and large scattering angles additional oscillations appeared which are presumed to be Stueckelberg oscillations. For N+ - Ne a single group of strongly marked oscillations appeared up to the highest energies used (EL = 220 eV). In the case of N+ - Ar the amplitudes of these undulations are strongly quenched. For N+ - Kr and N+ - Xe several groups of oscillations with different amplitudes and frequencies seem to be superimposed in the differential cross-section. They are attributed for all systems to crossings of the incoming state with the charge exchanged state.

scholarly journals The Elastic Scattering of 20 eV Electrons from Magnesium

1995 ◽  
Vol 48 (1) ◽  
pp. 71 ◽  
Author(s):  
MJ Brunger ◽  
RK Houghton ◽  
PJO Teubner
Keyword(s):  
Elastic Scattering ◽  
Differential Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Elastic Cross Section ◽  
Complex Phase ◽  
Shift Analysis ◽  
Order Of Magnitude ◽  
Elastic Differential Cross Section

A modulated crossed-beam technique has been used to measure the differential cross section for elastic scattering of electrons from the 31S state in magnesium at an impact electron energy of 20 eV. The cross section was measured over a range of scattering angles from 15� to 1300? Our results agree with the previous experimental cross sections of Williams and Trajmar within the combined uncertainties, however, the present data reduce the uncertainty by about an order of magnitude, thereby allowing a meaningful comparison to be made with the predictions of the various theories. At this time no theory accurately predicts the behaviour of the elastic differential cross section over the whole angular range. A complex phase-shift analysis is applied to the present data to derive the 20 e V integral elastic cross section. This integral cross section is also compared with the results of previous experiment and theory.

ELASTIC SCATTERING OF 28Si–27Al IN A REALISTIC OPTICAL POTENTIAL

1996 ◽  
Vol 05 (03) ◽  
pp. 533-541 ◽  
Author(s):  
M. RASHDAN
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Optical Potential ◽  
Realistic Model ◽  
Entire Energy Range ◽  
Entire Energy ◽  
Soft Core Potential

Within a realistic model for the optical potential between nuclei based on the solution of the Bethe-Goldstone equation with the Reid soft-core potential, the differential cross-sections of the 28 Si –27 Al system, recently measured at energies around the Coulomb barrier, are calculated. The experimental data are well-reproduced over the entire energy range without any adjustable parameters to fit the cross-section.

EFFECT OF SHORT-RANGE NUCLEAR CORRELATIONS ON THE (γ,p) CROSS SECTIONS FOR 208Pb IN A PARTICLE-HOLE MODEL

2001 ◽  
Vol 10 (02) ◽  
pp. 83-89
Author(s):  
THORSTEN RITZ ◽  
WERNER SCHEID
Keyword(s):  
Experimental Data ◽  
Total Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Short Range ◽  
Differential Cross Sections ◽  
Hole Model ◽  
Short Range Correlations ◽  
Correlation Factors

One-proton photodissociation cross sections are studied for the reaction 208 Pb (γ,p)207 Tl at photon energies between 20 and 80 MeV. The transition into the 1g7/2 state of 207Tl is calculated in a particle-hole model with short-range correlations and compared with estimated cross sections based on experimental differential cross sections of Bobeldijk (1995). The short-range correlations are described by Jastrow factors. The correlation factors increase the total cross section. This result is in better agreement with experimental data than calculations without short-range correlations.

ISOSPIN DECOMPOSITION OF pp → NNππ CROSS SECTIONS — DO WE SEE A SIGN OF Δ(1600) EXCITATION IN THE nnπ+π+ CHANNEL?

2009 ◽  
Vol 24 (02n03) ◽  
pp. 450-453
Author(s):  
◽  
T. SKORODKO ◽  
M. BASHKANOV ◽  
D. BOGOSLOWSKY ◽  
H. CALÉN ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Differential Cross ◽  
Pion Production ◽  
Significant Contribution ◽  
Differential Cross Sections ◽  
Pp Collisions ◽  
Theoretical Predictions ◽  
Order Of Magnitude ◽  
The Cross

The two-pion production in pp-collisions has been investigated in exclusive measurements from threshold up to Tp = 1.36 GeV . Total and differential cross sections have been obtained for the channels pnπ+π0, ppπ+π-, ppπ0π0 and also nnπ+π+. For intermediate incident energies Tp > 1 GeV , i.e. in the region, which is beyond the Roper excitation but at the onset of ΔΔ excitation the total ppπ0π0 cross section falls behind theoretical predictions by as much as an order of magnitude near 1.2 GeV, whereas the nnπ+π+ cross section is a factor of five larger than predicted. A model-unconstrained isospin decompostion of the cross section points to a significant contribution of an isospin 3/2 resonance other than the Δ(1232). As a possible candidate the Δ(1600) is discussed.

HADRON SPIN-FLIP AMPLITUDE AND SLOPE OF DIFFERENTIAL CROSS-SECTIONS

1999 ◽  
Vol 14 (03) ◽  
pp. 223-230 ◽  
Author(s):  
O. V. SELYUGIN
Keyword(s):  
Experimental Data ◽  
Cross Sections ◽  
Differential Cross ◽  
Scattering Amplitude ◽  
Previous Analysis ◽  
Differential Cross Sections ◽  
Spin Flip ◽  
Flip Amplitude

A possibility to obtain restrictions of the magnitude of the elastic spin-flip hadron scattering amplitude from accurately measured experimental data on the differential cross-sections of elastic hadron–hadron scattering is shown. Appropriate estimations confirm the previous analysis of experimental data at [Formula: see text] GeV and a probable contribution of the hadron spin-flip amplitude.

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