s-wave charmed baryon resonances from a coupled-channel approach with heavy quark symmetry

We study N and Δ hidden-charm baryon resonances that are generated dynamically from the s-wave interaction of pseudoscalar and vector mesons with 1/2+ and 3/2+ baryons. We use a unitary coupled-channels model that fulfills heavy-quark spin symmetry and respects spin-flavor symmetry in the light sector. We predict seven N-like and five Δ-like states with masses around 4 GeV, most of them as bound states. Some of these states form heavy-quark spin multiplets, which are almost degenerate in mass.

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χ-SU(3) BETHE SALPETER MODEL: EXTENSION TO SU(6) AND SU(8) SPIN-FLAVOR SYMMETRIES

Modern Physics Letters A ◽

10.1142/s021773230802923x ◽

2008 ◽

Vol 23 (27n30) ◽

pp. 2297-2300

Author(s):

J. NIEVES ◽

C. GARCÍA-RECIO ◽

L. L. SALCEDO ◽

V. MAGAS ◽

A. RAMOS ◽

...

Keyword(s):

Degrees Of Freedom ◽

Negative Parity ◽

S Wave ◽

Charmed Baryons ◽

Flavor Symmetries ◽

Heavy Quark Symmetry ◽

Model Extension ◽

Shell Approximation ◽

Baryon Resonances ◽

D Wave

Consistent SU(6) and SU(8) spin-flavor extensions of the SU(3) flavor Weinberg-Tomozawa (WT) meson-baryon chiral Lagrangian are constructed, which incorporate vector meson degrees of freedom. In the charmless sector, the on-shell approximation to the Bethe-Salpeter (BS) approach successfully reproduces previous SU(3) WT results for the lowest-lying s–wave negative parity baryon resonances. It also provides some information on the dynamics of heavier ones and of the lightest d-wave negative parity resonances, as e.g. the Λ(1520). For charmed baryons the scheme is consistent with heavy quark symmetry, and our preliminary results in the strangeness-less charm C = +1 sector describe the main features of the three-star JP = 1/2− Λc(2595) and JP = 3/2− Λc(2625) resonances. We also find a second broad JP = 1/2− state close to the Λc(2595).

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Ratios ofB andD meson decay constants with heavy quark symmetry

Pramana ◽

10.1007/bf02847770 ◽

1996 ◽

Vol 47 (3) ◽

pp. 261-261

Author(s):

A K Giri ◽

L Maharana ◽

R Mohanta

Keyword(s):

Heavy Quark ◽

Meson Decay ◽

Decay Constants ◽

Heavy Quark Symmetry

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Non-Relativistic Model for the Semileptonic Λb→Λc Decay

Modern Physics Letters A ◽

10.1142/s0217732397000194 ◽

1997 ◽

Vol 12 (03) ◽

pp. 195-204 ◽

Cited By ~ 6

Author(s):

Debrupa Chakraverty ◽

Triptesh De ◽

Binayak Dutta-Roy ◽

K. S. Gupta

Keyword(s):

Heavy Quark ◽

Decay Width ◽

Branching Ratio ◽

Relativistic Model ◽

Heavy Quark Symmetry ◽

Heavy Baryons

We calculate the decay width for [Formula: see text] in the framework of a non-relativistic quark (NRQ) model of heavy baryons where the light quarks play the role of spectators. Our calculation does not make an explicit use of the heavy quark symmetry. The branching ratio for the above process as calculated here agrees reasonably well with the experimental value.

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