B meson decays to baryons in the diquark model - INSPIRE

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B meson decays to baryons in the diquark model

Dec, 2001

9 pages

Published in:

Eur.Phys.J.C 23 (2002) 691-699

e-Print:

hep-ph/0112219 [hep-ph]

DOI:

10.1007/s100520200894

View in:

ADS Abstract Service

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Abstract:

We study B meson decays to two charmless baryons in the diquark model, including strong and electroweak penguins as well as the tree operators. It is shown that penguin operators can enhance \bar{B} \to \Bb_s \bar{\Bb} considerably, but affect \bar{B} \to \Bb_1 \bar{\Bb}_2 only slightly, where \Bb_{(1,2)} and \Bb_s are non-strange and strange baryons, respectively. The

\gamma

dependence of the decay rates due to tree-penguin interference is illustrated. In principle, some of the \Bb_s \bar{\Bb} modes could dominate over \Bb_1 \bar{\Bb}_2 for

\gamma > 90^\circ

, but in general the effect is milder than their mesonic counterparts. This is because the

O_6

operator can only produce vector but not scalar diquarks, while the opposite is true for

O_1

and

O_4

. Predictions from diquark model are compared to those from the sum rule calculation. The decays \bar{B} \to \Bb_s \bar{\Bb}_s and inclusive baryonic decays are also discussed.

Note:

9 pages, 6 figures, Revtex

B: hadronic decay
hyperon
quark: diquark
effect: penguin
electromagnetic interaction
strong interaction
tree approximation: interference
decay: inclusive reaction
decay: exclusive reaction
B: width

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