Inclusive semileptonic decays of polarized Lambda(b) baryons into polarized tau leptons - INSPIRE

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Inclusive semileptonic decays of polarized Lambda(b) baryons into polarized tau leptons

S. Balk
(
- Mainz U., Inst. Phys.
)
,
J.G. Korner
(
- Mainz U., Inst. Phys.
)
,
D. Pirjol
(
- Technion
)

Mar, 1997

32 pages

Published in:

Eur.Phys.J.C 1 (1998) 221-233

e-Print:

hep-ph/9703344 [hep-ph]

DOI:

10.1007/BF01245811

Report number:

MZ-TH-95-21,
TECHNION-PH-97-02

View in:

ADS Abstract Service

reference search21 citations

Citations per year

Abstract: (arXiv)

We employ OPE techniques within HQET to calculate the inclusive semileptonic decays of polarized

\Lambda_b

baryons. Lepton mass effects are included which enables us to also discuss rates into polarized

\tau

-leptons. We present explicit results for the longitudinal polarization of the

\tau

in the

\Lambda_b

rest frame as well as in the

(\tau ^-, \bar \nu_\tau)

c.m. frame. In both cases we make use of novel calculational techniques which considerably simplify the calculations. The transverse polarization components of the

\tau

are calculated in the

(\tau^-,\bar\nu_\tau)

c.m. frame. We delineate how to measure the full set of 14 polarized and unpolarized structure functions of the decay process by angular correlation measurements. A set of observables are identified that allow one to isolate the contributions of the two

O(1/m_b^2)

nonperturbative matrix elements

K_b

and

\epsilon_b

.

Note:

32 pages RevTex with 2 included figures

Lambda/b0: semileptonic decay
decay: inclusive reaction
Lambda/b0: polarization
HQET model
operator product expansion
lepton: mass
tau: polarization
polarization: longitudinal
polarization: transverse
structure function: polarization

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Figures(0)

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