MODEL-INDEPENDENT EXTRACTION OF VCB FROM SEMILEPTONIC DECAYS

被引：255

作者：

NEUBERT, M

机构：

[1] Institut für Theoretische Physik der Universität Heidelberg, W-6900 Heidelberg

来源：

PHYSICS LETTERS B | 1991年 / 264卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(91)90377-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The possibility of a model-independent extraction of \V(cb)\ from BBAR --> D(*)l-nu-lBAR decays is discussed. In the infinite quark mass limit, the decay rates at zero recoil are fixed by a normalization condition for the hadronic form factors, which, in general, is violated by 1/m(Q) corrections. In the case of BBAR --> D* transitions, however, these are found to vanish at the normalization point. Including the full order alpha-s renormalization of the decay rates, we obtain \V(cb)\ = 0.045 +/- 0.007, a value slightly more precise than the currently best one.

引用

页码：455 / 461

页数：7

共 31 条

[1] MEASUREMENT OF THE DECAY B0-]D-L+V [J].

ALBRECHT, H ;

GLASER, R ;

HARDER, G ;

KRUGER, A ;

NIPPE, A ;

OEST, T ;

REIDENBACH, M ;

SCHAFER, M ;

SCHMIDTPARZEFALL, W ;

SCHRODER, H ;

SCHULZ, HD ;

SEFKOW, F ;

WURTH, R ;

APPUHN, RD ;

DRESCHER, A ;

HAST, C ;

HERRERA, G ;

KOLANOSKI, H ;

LANGE, A ;

LINDNER, A ;

MANKEL, R ;

SCHECK, H ;

SCHWEDA, G ;

SPAAN, B ;

WALTHER, A ;

WEGENER, D ;

PAULINI, M ;

REIM, K ;

VOLLAND, U ;

WEGENER, H ;

FUNK, W ;

STIEWE, J ;

WERNER, S ;

BALL, S ;

GABRIEL, JC ;

GEYER, C ;

HOLSCHER, A ;

HOFMANN, W ;

HOLZER, B ;

KHAN, S ;

SPENGLER, J ;

CHARLESWORTH, CEK ;

EDWARDS, KW ;

FRISKEN, WR ;

KAPITZA, H ;

KRIEGER, P ;

KUTSCHKE, R ;

MACFARLANE, DB ;

MCLEAN, KW ;

ORR, RS .

PHYSICS LETTERS B, 1989, 229 (1-2) :175-180

[2] Measurement of D*+ polarization in the decay (B)over-bar0 -> D*+l-v [J].

ALBRECHT, H ;

BOCKMANN, P ;

GLASER, R ;

HARDER, G ;

KRUGER, A ;

NIPPE, A ;

REIDENBACH, M ;

SCHAFER, M ;

SCHMIDT-PARZEFALL, W ;

SCHRODER, H ;

SCHULZ, HD ;

SEFKOW, F ;

SPENGLER, J ;

WURTH, R ;

APPUHN, RD ;

DRESCHER, A ;

HAST, C ;

HERRERA, G ;

KAMP, D ;

KOLANOSKI, H ;

LINDNER, A ;

MANKEL, R ;

SCHECK, H ;

SCHWEDA, G ;

SPAAN, B ;

WALTHER, A ;

WEGENER, D ;

VOLLAND, U ;

WEGENER, H ;

FUNK, W ;

GABRIEL, JC ;

STIEWE, J ;

WERNER, S ;

CHARLESWORTH, CEK ;

EDWARDS, KW ;

FRISKEN, WR ;

KAPITZA, H ;

KUTSCHKE, R ;

MACFARLANE, DB ;

McLEAN, KW ;

NILSSON, AW ;

ORR, RS ;

PARSONS, JA ;

PATEL, PM ;

PRENTICE, JD ;

SEIDEL, SC ;

SWAIN, JD ;

TSIPOLITIS, G ;

YOON, TS ;

AMMAR, R .

PHYSICS LETTERS B, 1989, 219 (01) :121-126

[3]

BERKELMAN K, 1991, CLNS911044 CORN PREP

[4]

BJORKEN JD, 1990, 1990 RENC DAOST THUI

[5] FACTORIZATION TEST USING BBARO-] D-STAR+PI- AND AN ESTIMATE OF FDS USING B-]DDS- [J].

BORTOLETTO, D ;

STONE, S .

PHYSICAL REVIEW LETTERS, 1990, 65 (24) :2951-2954

[6]

BORTOLETTO D, 1989, THESIS SYRACUSE U

[7] VANISHING OF 1/M CORRECTIONS AT THRESHOLD [J].

BOYD, CG ;

BRAHM, DE .

PHYSICS LETTERS B, 1991, 257 (3-4) :393-398

[8] SPIN-DEPENDENT FORCES IN QUANTUM CHROMODYNAMICS [J].

EICHTEN, E ;

FEINBERG, F .

PHYSICAL REVIEW D, 1981, 23 (11) :2724-2744

[9] AN EFFECTIVE FIELD-THEORY FOR THE CALCULATION OF MATRIX-ELEMENTS INVOLVING HEAVY QUARKS [J].

EICHTEN, E ;

HILL, B .

PHYSICS LETTERS B, 1990, 234 (04) :511-516

[10] HEAVY MESON FORM-FACTORS FROM QCD [J].

FALK, AF ;

GEORGI, H ;

GRINSTEIN, B ;

WISE, MB .

NUCLEAR PHYSICS B, 1990, 343 (01) :1-13

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