Masses of Scalar and Axial-Vector B Mesons: A challenge to the quark model?

by Prof. Hai-Yang Cheng (Academia Sinica)

Thursday 22 Jun 2017, 10:00 → 11:00 Asia/Shanghai

A511

Abstract: The quark model encounters a great challenge in describing even-parity mesons such as 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 we point out that the closeness of strange and non-strange scalar charmed mesons will lead to the same degeneracy phenomenon in the B meson sector. a short CV for Prof. Hai-Yang Cheng, December, 1980 Ph.D. in Physics, Purdue University, USA July, 1973 M.S. in Physics, National Tsing Hua University, Taiwan July, 1971 B.S. in Physics, National Cheng Kung University, Taiwan 2012- Distinguished Research Fellow, Institute of Physics, Academia Sinica 1988-2012 Full Research Fellow, Institute of Physics, Academia Sinica 2010 Visiting Professor, SUNY at Stony Brook 2009-2010 Visiting Professor, Brookhaven National Lab 2001-2002 Visiting Professor, SUNY at Stony Brook 2000-2001 Visiting Professor, Brookhaven National Lab 1987-1988 Visiting Expert, Academia Sinica 1986-1987 Visiting Scientist, Indiana University 1985-1986 Chester Davis Fellow, Indiana University 1983-1985 Research Associate, Brandeis University 1982-1983 Visiting Assistant Professor, Purdue University 1980-1982 Research Associate, Purdue University Main achievement: For his contribution to the understanding of CP violation pheomenology in meson systems and the decay dynamics of heavy hadrons Speciality: Particle Physics Phenomenology including Nonleptonic Weak Decays, CP Violation, Heavy Quark Effective Theory, Proton Spin Structure, Polarized Structure Functions

Slides Degeneracy_IHEP.pdf Degeneracy_IHEP.ppt