Masses of Scalar and Axial-Vector B Mesons: A Challenge to the Quark Model?

時間:4月27日(四) 13:20 ~ 15:10

題目:Masses of Scalar and Axial-Vector B Mesons: A Challenge to the Quark Model?
講者:鄭海揚 特聘研究員

服務單位:中央研究院 物理研究所

地點:本校基礎科學教學研究大樓1樓 157室

對象:本所博士生及碩士生、或其他有興趣之師生

摘要:
The SU(3) quark model encounters a great challenge in describing even-parity mesons.
Specifically, the two-quark model has difficulties in understanding the light scalar mesons below 1 GeV,
scalar and axial-vector charmed mesons and the charmonium-like state X(3872).
A common wisdom for the resolution of these difficulties lies on the coupled channel
effects which will distort the quark model calculations. In this talk, I’ll focus on
the near mass degeneracy of scalar charmed mesons and discuss its implications on B physics.