Warner was withdrawn from Wednesday's drawn Champions Trophy match against New Zealand as reports emerged that he attacked Root in the early hours of Sunday morning.
England and Australia players had been in the Walkabout pub in Birmingham after England's 48-run success at Edgbaston on Saturday, when Warner is alleged to have struck Root, who is understood to have been wearing a fancy dress wig at the time.
Warner has been charged with breaking Cricket Australia's code of conduct regarding "unbecoming behaviour" and CA confirmed a hearing would begin at 9.30am UK time this morning via teleconference. CA code of behaviour commissioner The Hon Justice Gordon Lewis AM will hear the case.
The 26-year-old Warner was last month fined £3,700 for a foul-mouthed tweet exchange with two Australian journalists and CA recently banned four players - including vice-captain Shane Watson - from a Test against India for failing to complete a homework assignment.
On Wednesday he publicly warmed up with the side at Edgbaston yesterday as well as carrying drinks to team-mates as 12th man.
Australia captain George Bailey, who unintentionally raised smirks when he said Warner had taken news of his dropping "on the chin", also attempted to play down the seriousness.
"It's disappointing from my point of view, but it's a very minor incident and it's being dealt with in-house," he said.
"I really enjoy playing cricket with him. I love his enthusiasm, I love his energy, I love the way he plays. I'm looking forward to hopefully playing a lot more with him in whatever career I have."
