Recently at LHC one has obtained measurements of the total, elastic, and diffractive cross sections in pp collisions at very high energy. The total cross section is in good agreement with predictions based on a leading behavior σ_tot(s) ∝ (ln s/s0)2, on the other hand the elastic cross section is lower than most expectations and the diffractive cross section is higher. It is remarkable that the ratio (σ_el + σ_diff)/σ_tot calculated combining the results of the TOTEM and ALICE detectors is 0.495+0.05−0.06, very close to the maximum theoretically allowed value of 1/2 known as the Miettinen–Pumplin bound. In this work we discuss these results using the frameworks of single- and multi-channel eikonal models, and we outline the main difficulties for a consistent interpretation of the data
Interpretation of the measurements of total, elastic, and diffractive cross sections at LHC / Paolo, Lipari; Lusignoli, Maurizio. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 73:11(2013), pp. 2630-2644. [10.1140/epjc/s10052-013-2630-4]
Interpretation of the measurements of total, elastic, and diffractive cross sections at LHC
LUSIGNOLI, Maurizio
2013
Abstract
Recently at LHC one has obtained measurements of the total, elastic, and diffractive cross sections in pp collisions at very high energy. The total cross section is in good agreement with predictions based on a leading behavior σ_tot(s) ∝ (ln s/s0)2, on the other hand the elastic cross section is lower than most expectations and the diffractive cross section is higher. It is remarkable that the ratio (σ_el + σ_diff)/σ_tot calculated combining the results of the TOTEM and ALICE detectors is 0.495+0.05−0.06, very close to the maximum theoretically allowed value of 1/2 known as the Miettinen–Pumplin bound. In this work we discuss these results using the frameworks of single- and multi-channel eikonal models, and we outline the main difficulties for a consistent interpretation of the dataI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
