And when they believed Philip, proclaiming good news, the things concerning the reign of God and the name of Jesus Christ, they were baptized both men and women; and Simon also himself did believe, and, having been baptized, he was continuing with Philip, beholding also signs and mighty acts being done, he was amazed. And the apostles in Jerusalem having heard that Samaria hath received the word of God, did send unto them Peter and John, who having come down did pray concerning them, that they may receive the Holy Spirit, — for as yet he was fallen upon none of them, and only they have been baptized — to the name of the Lord Jesus; then were they laying hands on them, and they received the Holy Spirit.
Acts 8:12-17 YLT1898
Correct..the apostles had to be involved in the receipt of the Holy Spirit, in order to cause these believers to be "attached" to the central church in Jerusalem. By having the apostles lay hands upon them to receive the Holy Spirit, this sent the message that they were not to form their own separate church. With the Samaritans this was especially important due to the antagonism between them and the Jews historically.