Development of SAM over Different Phenomenological Models for Better Explanation of Elastic Scattering
Fahmida Sharmin,
Md. Azizur Rahman
Issue:
Volume 2, Issue 2, April 2015
Pages:
22-26
Received:
23 February 2015
Accepted:
9 March 2015
Published:
15 March 2015
Abstract: The information on nuclear bulk properties such as shapes, size and interaction radius can be obtained by studying the elastic scattering phenomena. Absorption is the process through which particles are removed from the entrance channel. In this present work we have discussed different models, found out their ambiguities and finally arrived at SAM, because of which elastic scattering problem becomes simple and experimental data can be described without any knowledge about absorption mechanism.
Abstract: The information on nuclear bulk properties such as shapes, size and interaction radius can be obtained by studying the elastic scattering phenomena. Absorption is the process through which particles are removed from the entrance channel. In this present work we have discussed different models, found out their ambiguities and finally arrived at SAM,...
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Proton−Proton Total Cross−Section Based On New Data of Colliders and Cosmic Rays
Jorge Pérez-Peraza,
Alejandro Sánchez Hertz
Issue:
Volume 2, Issue 2, April 2015
Pages:
27-33
Received:
24 March 2015
Accepted:
10 April 2015
Published:
21 April 2015
Abstract: High energy colliders (accelerators) are fundamental tools in many branches of science. Similarly, cosmic rays observatories are one of the windows to study the universe and high energy particle processes. The last advances in these fields are respectively the LHC (Large Hadron Collider) and the Pierre Auger Observatory. Among the main subjects studied in hadronic physics is the proton-proton (pp) elastic scattering. The Total Cross-Section (σpp), has been recently measured at 7 and 8 TeV in the LHC, and at 57 TeV in the Pierre Auger Observatory. Importance of the σpp lies in studies of elastic and diffractive scattering of protons, and to model the development of showers induced by the interaction of ultra high energy cosmic rays in the atmosphere. The gap in data between accelerators and cosmic ray experiment energies does not allow for the exact knowledge of σpp with energy. Furthermore, since cosmic rays results are of indirect nature, there is consequently a high dispersion in predictions of different authors at this regard. Using the new data, we show here that within the frame of the first-order Glauber multiple diffraction theory the overall data fits very successfully. Our results shows that σpp grows more slowly (compared with previous predictions), within narrow error bands that avoid any fast slope change. We predict that the future experimental value at 13 TeV from the LHC will fall nicely within our fitting curve. Our phenomenological approach allows for the calculation of σpp for any other energy value either at the colliders or cosmic ray energies. A deep knowledge, control and handle of hadron-hadron interactions at very high energies will have useful implications in many branches of physics.
Abstract: High energy colliders (accelerators) are fundamental tools in many branches of science. Similarly, cosmic rays observatories are one of the windows to study the universe and high energy particle processes. The last advances in these fields are respectively the LHC (Large Hadron Collider) and the Pierre Auger Observatory. Among the main subjects stu...
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