Prog. Theor. Phys. Vol. 96 No. 3 (1996) pp. 659-663

[ Full Text PDF : FREE ACCESS (200K) ]

Letters

The Ξ_Q - Ξ′_Q Mixing and Heavy Baryon Masses

Toshiaki Ito and Yoshimitsu Matsui

Department of Physics, Nagoya University, Nagoya 464-01

(Received May 12, 1996)

Abstract:

We examine the Ξ_Q - Ξ′_Q mixing and heavy baryon masses in the heavy quark effective theory with 1/m_Q corrections. In the conventional baryon assignment, we obtain the mixing angle cos ² θ= 0.88 ±0.12 by virtue of the Gell-Mann – Okubo mass relation. On the other hand, if we adopt the new baryon assignment given by Falk, the allowed region of the Σ_c mass is greater than 2372 MeV.

URL : http://ptp.ipap.jp/link?PTP/96/659/
DOI : 10.1143/PTP.96.659

References:

N. Isgur and M. B. Wise, Phys. Lett. B232 (1989), 113; B237 (1990), 527.
M. Neubert, Phys. Rep. 245 (1994), 259[CrossRef].
T. Ito, T. Morii and M. Tanimoto, Z. Phys. C59 (1993), 57.
N. Isgur and M. B. Wise, Phys. Rev. Lett. 66 (1991), 1130[APS].
A. F. Falk, JHU-TIPAC-96007, hep-ph/9603389[e-print arXiv].
M. E. Luke, Phys. Lett. B252 (1990), 447.
Particle Data Group, Phys. Rev. D50 (1994), `Review of Particle Properties' and 1995 off-year partial update for the 1996 edition.
WA89 Collaboration, `Charmed Baryon Production in the CERN Hyperon Beam', presented by E. Chudakov at Heavy Quark '94, Virginia, October, 1994.
CLEO Collaboration, Phys. Rev. Lett. 75 (1995), 4364[APS].
DELPHI Collaboration, DELPHI 95-107.

Citing Article(s) :

Progress of Theoretical Physics Vol. 99 No. 2 (1998) pp. 271-280 :
New Possibility of Solving the Problem of the Lifetime Ratio τ(Λ_b ) / τ(B_d)

Toshiaki Ito, Masahisa Matsuda and Yoshimitsu Matsui

[PTP HOME] [BROWSE] [SEARCH] [SUBSCRIPTION] [SUBMISSION] [REGISTRATION]