At the International Conference on Kaon Physics last year, a group of researchers searching for rare forms of kaon decays announced preliminary results that—if confirmed to be signal and not background—defy the standard model. Now, Kohsaku Tobioka of Florida State University, Tallahassee, and colleagues propose three explanations for the unexpected detections that involve new physics beyond the standard model, including the possibility of new particles.
To read more, click here.