Proposing a new constraint for predictions of pp, pbar p total cross sections and rho ratio at LHC

Abstract

We propose a new constraint(1) corresponding to the FESR (with the moment n=-1) free from unphysical regions. Using this constraint(1) together with the constraint(2) (with the moment n=1), we search for the simultaneous best fit to the data points of sigma-tot and rho ratio up to the SPS energies to determine those values at higher energies. We then predict sigma-tot=107.1 +- 2.6 mb, rho=0.127 +- 0.004 at the LHC energy(E=14 TeV).