CMT05

Coupling of order-parameter modes with l>1 to zero sound in ³He-B

Abstract:
The frequencies of B-phase order-parameter modes are calculated with l>1 pairing interactions and all Landau parameters included. The two modes that have been observed are modified by v₃ and the l=2 Landau parameters. The corrections from v₃ and F₂^a can explain the observed frequency and temperature dependence of the 2+ mode (real squashing mode). A new mode with J=4, whose frequency depends on v₃, v₅, and F₄^s, may be observable in the zerosound dispersion.

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