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New Class of Rare Quark Observed

Posted on | December 10, 2010 | Comments Off

Kurtis Nishimura headshot

Mānoa graduate student Kurtis Nishimura, working with other UH colleagues on the Belle experiment, reported the first observation of a new class of rare “penguin decays” of the beauty quark in the Nov. 5 issue of Physical Review Letters. Nishimura is the first author of this paper, which was the basis for his PhD dissertation.

B Factories are high energy particle accelerators that produce particles containing b (beauty) quarks in large numbers, over 100 million/year. The Belle experiment at KEKB factory in Tsukuba, Japan, is celebrated for its critical role in experimentally verifying the theoretical scheme for matter-antimatter asymmetry of Kobayashi and Maskawa, who were awarded the 2008 Nobel Prize in Physics.

Other UH Mānoa participants in Belle include faculty members Tom Browder, Mike Peters, Sven Vahsen, Gary Varner, research professor Michael Jones, post-doctoral fellows Chengping Shen, Igal Jaegle, Jared Yamaoka, engineers Matt Andrew and Marc Rosen, graduate students Jamal Rorie and Himansu Sahoo.

Read the news release.

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