Relaxation of axially confined 400 GeV/c protons to planar channeling in a bent crystal
L. Bandiera, A. Mazzolari, E. Bagli, G. Germogli, V. Guidi, A. Sytov, I. V. Kirillin, N. F. Shul’ga, A. Berra, D. Lietti, M. Prest, D. De Salvador and E. Vallazza