SCATTERING AMPLITUDE ZERO IN dū→γH−

1988 ◽  
Vol 03 (12) ◽  
pp. 1199-1203 ◽  
Author(s):  
XIAO-GANG HE ◽  
H. LEW
Keyword(s):  
Angular Distribution ◽  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Scattering Amplitude ◽  
Higgs Bosons ◽  
Factorization Property ◽  
High Energies ◽  
Charged Higgs ◽  
Charged Higgs Bosons

In models with physical charged Higgs bosons, the angular distribution of dū→γH− exhibits a factorization property. The differential cross section has a zero at the scattering cos -1(-⅓) in the γH− C.M. frame. The processes [Formula: see text] are also studied. It is found, at high energies, that the contribution of the sea quarks are significant enough to wash the zero away.

THE FORWARD PEAK OF ELASTIC HARDON-HADRON SCATTERING AND UNITARITY BOUNDS FOR THE DIFFERENTIAL CROSS-SECTION

1992 ◽  
Vol 07 (21) ◽  
pp. 1905-1913 ◽  
Author(s):  
M. KAWASAKI ◽  
T. MAEHARA ◽  
M. YONEZAWA
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Scattering Amplitude ◽  
High Energy ◽  
Forward Peak ◽  
Forward Scattering Amplitude ◽  
Interaction Radius ◽  
Interaction Range ◽  
Small Momentum

Unitarity bounds for the differential cross-section of high-energy elastic hadron-hadron scattering are obtained under the constraints of fixed total cross-section σt, elasticity x, real part to imaginary part ratio ρ of the forward scattering amplitude, and forward slope b by assuming a finite interaction range. The obtained upper bound has an observed curvature structure at small momentum transfers and is nearly saturated by the experimental data of pp and [Formula: see text] scattering at −t=0−0.3 (GeV/c)2 in the energy region [Formula: see text] , if we take the interaction radius scaled as [Formula: see text].

ELASTIC pd SCATTERING AT HIGH ENERGIES

1988 ◽  
Vol 03 (05) ◽  
pp. 1301-1319 ◽  
Author(s):  
V.M. BRAUN ◽  
L.G. DAKHNO ◽  
V.A. NIKONOV
Keyword(s):  
Experimental Data ◽  
Differential Cross Section ◽  
Multiple Scattering ◽  
Cross Section ◽  
Differential Cross ◽  
Scattering Theory ◽  
High Energy ◽  
Multiple Scattering Theory ◽  
High Energies

High energy differential pd cross section is calculated in the framework of the multiple scattering theory, inelastic correction included. Special attention is paid to the analysis of the calculation uncertainties. The results agree well with the experimental data obtained at ISR energies in the q2 range 0.06–1.05 (GeV/c) 2. The calculation accuracy is proved to be not worse than 10–20% at q2~0.2 (GeV/c) 2 and much better at small q2, namely, ~1% in the optical point. Prediction for the differential cross section at UNK energy E lab =3 TeV is given.

Elastische Streuung von Protonen an Bleikernen bei 19,2 GeV/c

1963 ◽  
Vol 18 (11) ◽  
pp. 1182-1184
Author(s):  
H. Going
Keyword(s):  
Angular Distribution ◽  
Differential Cross Section ◽  
Proton Beam ◽  
Cross Section ◽  
Differential Cross ◽  
Forward Direction ◽  
Nuclear Scattering

The very well collimated 19,2 GeV/c CERN proton-beam hits a Pb-target. Small emulsions behind the target measure the angular distribution of scattered protons between 0.1° — 0.6°. This distribution yields a radius of interaction R=5.6 ·10-13 cm for Pb nuclei. The differential cross section for elastic nuclear scattering in the forward direction is found to be σ(0°) =2.15 ·105 barn/ster. These results are compared with those obtained by other authors.

scholarly journals Reactive Scattering of Oxygen Atoms With Bromine Molecules

1988 ◽  
Vol 9 (4-6) ◽  
pp. 265-276 ◽  
Author(s):  
N. C. Firth ◽  
N. W. Keane ◽  
D. J. Smith ◽  
R. Grice
Keyword(s):  
Angular Distribution ◽  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Rotational Motion ◽  
Correlation Time ◽  
Cross Correlation ◽  
Translational Energy ◽  
Reactive Scattering ◽  
Centre Of Mass

Reactive scattering of O atoms with Br2 molecules has been studied at an initial translational energy E~35 kJ mol−1 using cross-correlation time-of-flight analysis with resolution improved over previous measurements. The centre-of-mass differential cross section peaks in the forward and backward directions with a higher product translational energy for backward Scattering. The angular distribution traced at the peak of the product velocity distribution peaks more sharply in the forward than the backward direction but the angular distribution of product flux shows a distribution which is more nearly symmetrical about θ = 90°. The observed scattering is attributed to a triplet OBrBr complex intermediate with a lifetime which is shorter than the period of overall rotation of the axis of the heavy BrBr diatomic but which is long compared with the period of vibrational and rotational motion of the light O atom.

2S Excitation of atomic hydrogen by electron impact at high energies

1983 ◽  
Vol 61 (5) ◽  
pp. 748-752 ◽  
Author(s):  
N. Saha
Keyword(s):  
Differential Cross Section ◽  
Total Cross Section ◽  
Electron Impact ◽  
Cross Section ◽  
Differential Cross ◽  
Atomic Hydrogen ◽  
Excitation Cross Section ◽  
High Energies ◽  
Comparison Of The Results ◽  
Theoretical Results

The 2S excitation cross section of atomic hydrogen by electron impact at high energies has been calculated following the method of Das. Comparison of the results for the differential cross section with other theoretical results, and comparison of the results for the total cross section with those of other theories and experiments, shows that the results of the present calculations are fairly accurate.

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