scholarly journals Bounds on the Asymptotic Behavior of an Elastic Scattering Amplitude near the Forward Direction

1971 ◽  
Vol 46 (2) ◽  
pp. 559-576 ◽  
Author(s):  
Fujio Takagi
Keyword(s):  
Asymptotic Behavior ◽  
Elastic Scattering ◽  
Scattering Amplitude ◽  
Forward Direction ◽  
Elastic Scattering Amplitude

Glaubere−- Li elastic scattering amplitude

1976 ◽  
Vol 14 (1) ◽  
pp. 189-192 ◽  
Author(s):  
F. T. Chan ◽  
C. H. Chang
Keyword(s):  
Elastic Scattering ◽  
Scattering Amplitude ◽  
Elastic Scattering Amplitude

scholarly journals First determination of the $${\rho }$$ parameter at $${\sqrt{s} = 13}$$ TeV: probing the existence of a colourless C-odd three-gluon compound state

2019 ◽  
Vol 79 (9) ◽  
Author(s):  
G. Antchev ◽  
P. Aspell ◽  
I. Atanassov ◽  
V. Avati ◽  
J. Baechler ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Total Cross Section ◽  
Cross Section ◽  
Scattering Amplitude ◽  
Theoretical Models ◽  
Proton Proton ◽  
Slowing Down ◽  
Proton Elastic Scattering ◽  
Compound State ◽  
Elastic Scattering Amplitude

Abstract The TOTEM experiment at the LHC has performed the first measurement at $$\sqrt{s} = 13\,\mathrm{TeV}$$s=13TeV of the $$\rho $$ρ parameter, the real to imaginary ratio of the nuclear elastic scattering amplitude at $$t=0$$t=0, obtaining the following results: $$\rho = 0.09 \pm 0.01$$ρ=0.09±0.01 and $$\rho = 0.10 \pm 0.01$$ρ=0.10±0.01, depending on different physics assumptions and mathematical modelling. The unprecedented precision of the $$\rho $$ρ measurement, combined with the TOTEM total cross-section measurements in an energy range larger than $$10\,\mathrm{TeV}$$10TeV (from 2.76 to $$13\,\mathrm{TeV}$$13TeV), has implied the exclusion of all the models classified and published by COMPETE. The $$\rho $$ρ results obtained by TOTEM are compatible with the predictions, from other theoretical models both in the Regge-like framework and in the QCD framework, of a crossing-odd colourless 3-gluon compound state exchange in the t-channel of the proton–proton elastic scattering. On the contrary, if shown that the crossing-odd 3-gluon compound state t-channel exchange is not of importance for the description of elastic scattering, the $$\rho $$ρ value determined by TOTEM would represent a first evidence of a slowing down of the total cross-section growth at higher energies. The very low-|t| reach allowed also to determine the absolute normalisation using the Coulomb amplitude for the first time at the LHC and obtain a new total proton–proton cross-section measurement $$\sigma _{\mathrm{tot}} = (110.3 \pm 3.5)\,\mathrm{mb}$$σtot=(110.3±3.5)mb, completely independent from the previous TOTEM determination. Combining the two TOTEM results yields $$\sigma _{\mathrm{tot}} = (110.5 \pm 2.4)\,\mathrm{mb}$$σtot=(110.5±2.4)mb.

The real part of p forward elastic scattering amplitude at 0.7 GeV/c

1976 ◽  
Vol 61 (2) ◽  
pp. 203-206 ◽  
Author(s):  
H. Kaseno ◽  
R. Hamatsu ◽  
K. Kawano ◽  
M. Kimura ◽  
M. Takanaka ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Scattering Amplitude ◽  
The Real ◽  
Elastic Scattering Amplitude

Measurement of the real part of π−p elastic scattering amplitude in the coulomb interference region at 3.5 GeV/c

1966 ◽  
Vol 22 (3) ◽  
pp. 350-352 ◽  
Author(s):  
A.A. Nomofilov ◽  
I.M. Sitnik ◽  
L.A. Slepets ◽  
L.N. Strunov ◽  
L.S. Zolin
Keyword(s):  
Elastic Scattering ◽  
Scattering Amplitude ◽  
The Real ◽  
Interference Region ◽  
Elastic Scattering Amplitude
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