Exotic pentaquark observation at LHCb

par Liming Zhang (Tsinghua University - China)

mardi 1 déc. 2015, 11:00 → 12:00 Europe/Paris

Auditorium Pierre Lehmann (LAL)

I will discuss the discovery of two pentaquark states both decaying into a J/ψ meson and a proton. The decay mode defines the quark content as c cbar, u, u, d, and thus are called charmonium pentaquarks. These exotic structures are found in Λb→J/ψ K- p decays using a full amplitude analysis using 7 and 8 TeV pp collisions from 3/fb of data collected by the LHCb experiment. The two states will be shown to be of opposite parity and have spins 3/2 and 5/2. Finally different models of pentaquark structure will be discussed.

Poster Sem_20151201.pdf

Transparents Seminar-liming.pptx