If you can't locate a driver, for scanning try using the Image Capture app in your Applications folder.
Launch Image Capture.
Connect the scanner to your Mac whether Wi-Fi or USB.
Click the very small black box bottom left side of the Image Capture window.
You'll see this pop up menu: Connecting this (device) opens:
You can select a default app to scan (Image Capture) and select a folder from the Import To pop up menu on the right to save scanned files to.
If you need help with the Image Capture software, click Help from the Image Capture menu bar.
< help with Image Capture software
And see if your HP model is listed for printing here > OS X: Printer and scanner software available for download
And you could try a reset > OS X Mavericks: Reset the printing system