Home Works Symposium Session at JPS Halfday symposium

Home Works

Symposium Session at JPS Half-day symposium session “Multi-quark hadrons probed by various flavors” @ March JPS meeting, Rikkyo University (Used Language: Englsih) Please come !

Write-up All speakers; • Please provide us with a 1(or 2)-page summary with figure. • Send it to hadron_ws@hepl. phys. nagoya-u. ac. jp by the end of this month. • We post it on the web.

Home Works for Belle • • • B(Ds. J(2317) Dsg)/ B(Ds. J(2317) Dsp 0) B D*+p-p+ (65 MBB): M(D*+p-) update , D^ ? B(X(3872) y’g) : 3 x. B(X(3872) J/yg) ? X(3872) J/y p 0 p 0 ? (I=0 or 1) X(3872) or X(tetra-quark) wg, h. Dg ? • e+e- Q +(1520)/L (1405)/baryon X • e+e- h X Fragmentation Func. (K/p/f 0(980)) • X- Be/Si scattering LL • Threshold effects for three-particles.

Home Works for NP people • Proposal for analyses at Belle – Some topics as the first goal. • Belle BGM, March 23 -24 • S-Belle BGM, March 17 -19 Pass the PRC review, Nakano-san !

Home Works for Theorists • So far works are done mainly for interpreting the observed phenomena. But, we need more predictions

Multiquarks • Tetraquark qq- q*q*-correlations, [ud], etc for σ, κ, f 0, a 0, Ds, … • Molecular type, Λ(1405), N(1535), … Heavy baryon analogues? Dynamical questions: • qq or qq* correlations -> formation of diquarks in hadrons • What is appropriate picture of hadron excitations quark excitation -> single particle -> quarkonia qq* creation -> multiquakrs • Mixing of different seeds. Do the number of states conserve? • Do they change as functions of flavors, density and temperature How to? • Spectroscopy, decays, productions, fragmentation functions Reaction dynamics • Effective Lagrangian method, tree level • Coupled channel dynamics-> interference, threshold effects • Physical meaning of model parameters, hadron loop, quark structure

Roles of symmetry • Spontaneous breaking of chiral symmetry • mass generation of light quarks, constituent quarks • Dynamics of pions • Vector mesons • Gauge symmetry, Hidden gauge symmetry • Symmetry for heavy quark systems • change in spin-spin interactions (non-perturbative? ) Make predictions and proposals for experiments Work with Lattice for inputs of models Find a reasonable effective model with quasi-particles From simplicity to variety

Acknowledgement • • • Kato-san (G-COE office) Sugiura-san Harada-san Hara-san Students from H-lab. and N-lab. – Takemoto-san, Yamaoka-san, Hoshino-san, Wakayama-san. – Shiizuka-san, Arita-san.

Thank you for coming to Weekend Workshop! Have a safe back.