Some additional comments about the determination of p, the ratio between the real part and the imaginary part of the forward elastic amplitude, in hadron collisions at high energies

• Main Authors: Antonio Braz de Pádua, Cléia Guiotti de Pádua
• Format: Article
• Language: English
• Published: Universidade Estadual de Londrina 2004-01-01
• Series: Semina: Ciências Exatas e Tecnológicas
• Subjects: Elastic Scattering; High Energies; Proton; Antiproton; Elastic Scattering Amplitude; Elastic Differential Cross Section; Small Momentum Transfer; Coulomb Region; Coulomb Interference Region; Hadronic Region
• Online Access: http://www.uel.br/revistas/uel/index.php/semexatas/article/view/1561

The correct method of determination of ?, the ratio between the real and imaginary part of the elastic scattering amplitude in the forward direction, in the hadronic collisions at high energy, remains as an is still considered an open subject up till now. In this work we come back to discuss this problem and present two alternative fits for adjustment of the experimental data of d?/dt in the Coulomb – Hadronic Interference region are presented, consequently obtaining as well as the value of ?. Our proposals were tested with the data obtained in the polemic experiment accomplished in CERN in 1986 by the UA4/1 collaboration for the pp collision at s = 546GeV. Using these same data, we calculated the variable ? again and we found values much smaller than the original value of 0.24 ± 0.04, namely, 0.197 ± 0.020 and 0.189 ± 0.030.