You can use Maven search: opt for advanced search and paste the class name. Then from the search results, pick the relevant version (4.8.0 in your case); this will show you the jar.
You can also search for both version and class name. Use v
for version and fc
for class name, e.g. the full query would look like as follows:
v:"4.8.0" fc:"org.apache.lucene.analysis.standard.StandardAnalyzer"