S. Orlik and M. Strauch have studied locally analytic principal series representation for
general
-adic
reductive groups generalizing an earlier work of P. Schneider for
and related the condition of irreducibility of such locally analytic
representation with that of a suitable Verma module. We take the case of
and
study the globally analytic principal series representation under the action of the
pro- Iwahori
subgroup of
,
following the notion of globally analytic representations introduced by
M. Emerton. Furthermore, we relate the condition of irreducibility of our
globally analytic principal series to that of a Verma module. Finally, using the
Steinberg tensor product theorem, we construct the Langlands base change
of our globally analytic principal series to a finite unramified extension of
.