Dark matter gets its own dark force

 作者:施蔻喁     |      日期:2019-02-26 01:01:00
By Zeeya Merali The behaviour of the Bullet cluster – the poster-child for the existence of dark matter – is provoking some cosmologists to propose that there might be a fifth fundamental force. Most physicists are confident that they have uncovered all the forces that affect ordinary matter: gravity, electromagnetism, and the strong and weak nuclear forces. If there was a fifth force that influenced only dark matter, however, it could easily be at work without us realising,