Thinkpad T460 - how do I disable the touchpad?

I recently got a Thinkpad T460 and am running Ubuntu 20.04 on it. I don't use a DE, just plain old i3. I'm like to keep my hands on the keyboard. That's why I like the trackpoint. However, I keep accidentally touching the touchpad, resulting in unwanted mouse movements and even clicks (even though I barely touch it!) I'm exploring multiple options to improve the situation. This question is about disabling the touchpad completely. According to xinput list, there is only one device (see below):

$ xinput list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ PS/2 Synaptics TouchPad                   id=11   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Sleep Button                              id=8    [slave  keyboard (3)]
    ↳ Integrated Camera: Integrated C           id=9    [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=10   [slave  keyboard (3)]
    ↳ ThinkPad Extra Buttons                    id=12   [slave  keyboard (3)]

And if I run xinput disable 11, both trackpoint and touchpad are disabled. How can I disable ONLY the touchpad?