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P.C.Vinodkumar Department of Physics Sardar Patel University, Vallabh Vidyanagar

This talk delves into the analysis of open charm mesons using potential models and spectroscopy, addressing new particles from recent experiments, quark model predictions, puzzles in charmed states, di-meson systems, weak processes in heavy flavor physics, and future experiments.

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P.C.Vinodkumar Department of Physics Sardar Patel University, Vallabh Vidyanagar

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  1. q b Q c Open Flavour Charmed mesons P.C.Vinodkumar Department of Physics Sardar Patel University, Vallabh Vidyanagar pothodivinod@yahoo.com

  2. Plan of the Talk • Introduction • Spectroscopy & New Particles from Recent experiments • Quark model Analysis: - A Potential model Predictions of Open Charm mesons (CPP) • Puzzles about these new states • A Potential model study of Di - mesonic systems • Weak processes and related Aspects of Heavy flavour Physics • Future Experiments and Expectations

  3. Introduction

  4. Spectroscopy & New Particles from BaBar, Belle, Cleo and Focus Collaborations

  5. Quark model Analysis: Potential Models HQET QCD Sum rule Chiral Model Lattice etc…

  6. A potential model Predictions (CPP) The Hamiltonian for the case be written as [Hwang et al,1996] Where M is the heavy quark mass, m is the light quark mass, p is the relativistic momentum of each quark and V(r) is the quark- antiquark potential.

  7. S-Wave and P-Wave masses (in GeV) of D meson S-Wave and P-Wave masses (in GeV) of Dsmeson [1] PDG 2006; [7] G. L. Wang PLB633,2006; [8] D. Ebert et. al PRD57,1998; [9] JNP & PCV Pramana57, 2001.

  8. Decay Constant of Dmeson Decay Constant of Ds meson [1] PDG 2006; [7] G. L. Wang, PLB633,2006; [15] G Cvetic et. al, PLB596,2004; [16] A.A Peninand et. al, PRD65, 2002; [17] D Ebert et. al, MPLA17, 2002.

  9. Puzzles about these states * Near equality of the masses of non strange and strange charmed states – Not theoretically reproduced. * The missing evidence of the radiative decay mode D*sJ(2317) → D*sγ (deserve further Experimental Investigations) • One could look at The modes- B → DsJM (M= D,K,π) → can further discriminate between quark antiquark and multiquark interpretations. ψ(4415) → D*sDsJ(2317)→ can also investigate charmed resonances

  10. Spectroscopy and new particles at Belle

  11. Potential model study of Di - mesonic systems:

  12. t d,s b c c b W+ W- W- s b d d,s d k0 t Weak processes and related Aspects of Heavy flavour Physics

  13. TEVATRON, Fermi Lab's Collider: CDF detectors

  14. EXPT.[PDG,2006] 6.286

  15. Thanks

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