VCB FROM SEMILEPTONIC B-DECAYS AND THE RELIABILITY OF THE INFINITE QUARK MASS LIMIT

被引：33

作者：

BALL, P

机构：

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

来源：

PHYSICS LETTERS B | 1992年 / 281卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(92)90287-E

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the latest experimental results on semi-leptonic B-decays, we extract \V(cb)\ by means of both QCD sum rules and sum rules in the infinite quark mass limit. It is shown that corrections from finite quark mass and the analytical structure of the Isgur-Wise function near the normalization point play a crucial part and question the reliability of the limit of infinitely heavy quarks for b --> c decays. From QCD sum rules we obtain \V(cb)\(tau(B)/1.32 ps)1/2 = 0.037 +/- 0.002 +/- 0.003, where the first error is experimental, and the second comes from uncertainties in the sum rule parameters.

引用

页码：133 / 140

页数：8

共 28 条

[1] MEASUREMENT OF THE DECAY B- -] D(STAR0)L(-)NU-BAR [J].

ALBRECHT, H ;

EHRLICHMANN, H ;

HAMACHER, T ;

KRUGER, A ;

NAU, A ;

NIPPE, A ;

NOWAK, S ;

REIDENBACH, M ;

SCHAFER, M ;

SCHRODER, H ;

SCHULZ, HD ;

WALTER, M ;

WURTH, R ;

APPUHN, RD ;

HAST, C ;

HERRERA, G ;

KOLANOSKI, H ;

LANGE, A ;

LINDNER, A ;

MANKEL, R ;

SCHIEBER, M ;

SIEGMUND, T ;

SPAAN, B ;

THURN, H ;

TOPFER, D ;

WALTHER, A ;

WEGENER, D ;

PAULINI, M ;

REIM, K ;

WEGENER, H ;

MUNDT, R ;

OEST, T ;

SCHMIDTPARZEFALL, W ;

FUNK, W ;

STIEWE, J ;

WERNER, S ;

EHRET, K ;

HOLSCHER, A ;

HOFMANN, W ;

HUPPER, A ;

KHAN, S ;

KNOPFLE, KT ;

SPENGLER, J ;

BRITTON, DI ;

CHARLESWORTH, CEK ;

EDWARDS, KW ;

KAPITZA, H ;

KRIEGER, P ;

MACFARLANE, DB ;

PATEL, PM .

PHYSICS LETTERS B, 1992, 275 (1-2) :195-201

[2]

ALIEV TM, 1983, SOV J NUCL PHYS+, V38, P936

[3]

ATWOOD WB, SLACPUB5671 PREPR

[4] QCD SUM-RULES IN THE EFFECTIVE HEAVY QUARK THEORY [J].

BAGAN, E ;

BALL, P ;

BRAUN, VM ;

DOSCH, HG .

PHYSICS LETTERS B, 1992, 278 (04) :457-464

[5] DECAY-B-]DL-NU-BAR FROM QCD SUM-RULES [J].

BAIER, VN ;

GROZIN, AG .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1990, 47 (04) :669-675

[6] FORM-FACTORS OF SEMILEPTONIC D-DECAYS FROM QCD SUM-RULES [J].

BALL, P ;

BRAUN, VM ;

DOSCH, HG .

PHYSICAL REVIEW D, 1991, 44 (11) :3567-3581

[7]

BALL P, HDTHEP929 HEID PREPR

[8]

BJORKEN J, 1990, SLACPUB5278 PREPR

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

FALK, AF ;

GEORGI, H ;

GRINSTEIN, B ;

WISE, MB .

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

[10] AN EFFECTIVE FIELD-THEORY FOR HEAVY QUARKS AT LOW ENERGIES [J].

GEORGI, H .

PHYSICS LETTERS B, 1990, 240 (3-4) :447-450

← 1 2 3 →