A MODEL-INDEPENDENT DETERMINATION OF THE INCLUSIVE SEMILEPTONIC DECAY FRACTION OF B-MESONS

被引：53

作者：

ALBRECHT, H

EHRLICHMANN, H

HAMACHER, T

HOFMANN, RP

KIRCHHOFF, T

NAU, A

NOWAK, S

SCHRODER, H

SCHULZ, HD

WALTER, M

WURTH, R

HAST, C

KOLANOSKI, H

KOSCHE, A

LANGE, A

LINDNER, A

MANKEL, R

SCHIEBER, M

SIEGMUND, T

SPAAN, B

THURN, H

TOPFER, D

WEGENER, D

BITTNER, M

ECKSTEIN, P

PAULINI, M

REIM, K

WEGENER, H

ECKMANN, R

MUNDT, R

OEST, T

REINER, R

SCHMIDTPARZEFALL, W

FUNK, W

STIEWE, J

WERNER, S

EHRET, K

HOFMANN, W

HUPPER, A

KHAN, S

KNOPFLE, KT

SEEGER, M

SPENGLER, J

BRITTON, DI

CHARLESWORTH, CEK

EDWARDS, KW

HYATT, ERF

KAPITZA, H

KRIEGER, P

MACFARLANE, DB

机构：

[1] UNIV DORTMUND,INST PHYS,W-4600 DORTMUND 50,GERMANY

[2] TECH UNIV DRESDEN,INST KERN & TEILCHENPHYS,O-8027 DRESDEN,GERMANY

[3] UNIV ERLANGEN NURNBERG,INST PHYS,W-8520 ERLANGEN,GERMANY

[4] UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG 13,GERMANY

[5] UNIV HEIDELBERG,INST HOCHENERGIEPHYS,W-6900 HEIDELBERG,GERMANY

[6] MAX PLANCK INST NUCL PHYS,W-6900 HEIDELBERG 1,GERMANY

[7] UNIV KARLSRUHE,INST EXPTL KERNPHYS,W-7500 KARLSRUHE,GERMANY

[8] UNIV LJUBLJANI,INST J STEFAN & ODDELEK FIZ,LJUBLJANA,SLOVENIA

[9] INST THEORET & EXPTL PHYS,MOSCOW,RUSSIA

来源：

PHYSICS LETTERS B | 1993年 / 318卷 / 02期

关键词：

D O I：

10.1016/0370-2693(93)90146-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

With the ARGUS detector at the e+e- storage ring DORIS II, we have determined decay fraction and electron momentum spectrum of the inclusive decay mode B --> e(upsilon) X. Using lepton tags from the second B meson in 209 000 UPSILON(4S) --> BBBAR decays, we could determine the spectrum for all electron momenta p(e) > 0.6 GeV/c. Including the small extrapolation to p(e) > 0, we find the model-independent decay fraction beta(B --> eupsilonX) = (9.6 +/- 0.5 +/- 0.4)%. Adding D meson tags, our result is (9.7 +/- 0.5 +/- 0.4)%.

引用

页码：397 / 404

页数：8

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