In the science of Hadith, the next Sahih on authenticity is

In the science of Hadith, the next Sahih on authenticity after Muttasil is Hasan. Muttasil refers to a Hadith chain that is continuous, with all the narrators in the chain having met and heard from each other. The next level of authenticity is Hasan, which refers to a Hadith that has a good chain of narrators but may have minor defects or weaknesses in the chain or the text. In other words, a Hasan Hadith has a chain of narrators that is reliable and trustworthy but may have minor issues that do not invalidate the Hadith as a whole. These minor issues could include things like a missing narrator or a narrator who is known to make mistakes occasionally. It's important to note that while a Hasan Hadith is considered authentic, it is still not as strong as a Sahih Hadith, which has a chain of narrators that is free from any major defects or weaknesses.