Open Flavour Charmed mesons Q q c b

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

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

Introduction 3

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

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Ø 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 quarkantiquark potential. 7

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S-Wave and P-Wave masses (in Ge. V) of D meson S-Wave and P-Wave masses (in Ge. V) of Ds meson [1] PDG 2006; [7] G. L. Wang PLB 633, 2006; [8] D. Ebert et. al PRD 57, 1998; [9] JNP & PCV Pramana 57, 2001. 10

Decay Constant of D meson Decay Constant of Ds meson [1] PDG 2006; [7] G. L. Wang, PLB 633, 2006; [15] G Cvetic et. al, PLB 596, 2004; [16] A. A Peninand et. al, PRD 65, 2002; [17] D Ebert et. al, MPLA 17, 2002. 11

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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*s. J(2317) → D*sγ (deserve further Experimental Investigations) • One could look at The modes. B → Ds. JM (M= D, K, π) → can further discriminate between quark antiquark and multiquark interpretations. ψ(4415) → D*s Ds. J(2317) → can also investigate charmed resonances 15

Spectroscopy and new particles at Belle 16

Potential model study of Di - mesonic systems: 17

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Weak processes and related Aspects of Heavy flavour Physics b t d, s W+ d, s Wb t c b Wd c s 0 k d 19

TEVATRON, Fermi Lab's Collider: detectors CDF 20

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EXPT. [PDG, 2006] 6. 286 24

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Thanks 29