Perturbative QCD- and power-corrected hadron spectra and spectral moments in the decay B #->#X_sl"+l"-

Leading order (in #alpha#_s) perturbative QCD and power (1/m_b"2) corrections to the hadronic invariant mass and hadron energy spectra in the decay B #-># X_sl"+l"- are reviewed in the standard model using the heavy quark expansion technique (HQET). In particular, the first two hadronic moments left angle S_H"n right angle and left angle E_H"n right angle, n = 1,2, are presented working out their sensitivity on the HQET parameters #lambda#_1 and anti #LAMBDA#. Data from the forthcoming B facilities can be used to measure the short-distance contribution in B #-># X_sl"+l"- and determine the HQET parameters from the moments left angle S_H"n right angle. This could be combined with complementary constraints from the decay B #-># Xl#nu#_l to determine these parameters precisely. (orig.)SIGLEAvailable from TIB Hannover: RA 2999(98-127) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman