effect enhanced by an increase of $B$ \[18,19\]. For these reasons, the first order transition along $B_m(T)$ will be weakened with increasing $B$ and will disappear at some upper critical point $B_{\rm
ucp}$. Then, it is clear that the vortex state just below the thermal first order transition and below $B_{\rm ucp}$ need not have a positional order. Actually, as explained above, the glass transition line begins to deviate from $B_m(T)$ to lower temperature with increasing $\Delta_{\rm eff}(T)$ or $B$ and approaches $B_{\rm VG}^\infty(T)$ at high enough fields. Note that $B_{\rm
VG}^\infty(T)$ decreases with reducing the pinning strength and, as suggested below eq.(2.17), decreases more rapidly than $B_m(T)$ with increasing $\theta_f$. Hence, there is a possibility \[17\] of a wider window of the so-called vortex slush regime \[35\] in cleaner systems as far as it is not masked by the BrG phase which may exist at lower fields (see Fig.3 below).

Of course, the vortex slush regime is a part of the vortex liquid region and hence, of the normal metal phase because the linear resistance is finite there. In the present theory, the in-plane resistivity $\rho_{xx}$ ($= \rho_{yy}$) in this regime vanishes algebraically on approacing the glass transition, as 