MEASUREMENT OF CABIBBO-SUPPRESSED DECAYS OF THE TAU-LEPTON

被引：32

作者：

BATTLE, M

ERNST, J

KWON, Y

ROBERTS, S

THORNDIKE, EH

WANG, CH

DOMINICK, J

LAMBRECHT, M

SANGHERA, S

SHELKOV, V

SKWARNICKI, T

STROYNOWSKI, R

VOLOBOUEV, I

WEI, G

ZADOROZHNY, P

ARTUSO, M

GOLDBERG, M

HE, D

HORWITZ, N

KENNETT, R

MOUNTAIN, R

MONETI, GC

MUHEIM, F

MUKHIN, Y

PLAYFER, S

ROZEN, Y

STONE, S

THULASIDAS, M

VASSEUR, G

ZHU, G

BARTELT, J

CSORNA, SE

EGYED, Z

JAIN, V

KINOSHITA, K

EDWARDS, KW

OGG, M

BRITTON, DI

HYATT, ERF

MACFARLANE, DB

PATEL, PM

AKERIB, DS

BARISH, B

CHADHA, M

CHAN, S

COWEN, DF

EIGEN, G

MILLER, JS

OGRADY, C

URHEIM, J

机构：

[1] SO METHODIST UNIV,DALLAS,TX 75275

[2] SYRACUSE UNIV,SYRACUSE,NY 13244

[3] VANDERBILT UNIV,NASHVILLE,TN 37235

[4] VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061

[5] CARLETON UNIV,OTTAWA K1S 5B6,ONTARIO,CANADA

[6] INST PARTICLE PHYS,MONTREAL,PQ,CANADA

[7] MCGILL UNIV,MONTREAL H3A 2T8,QUEBEC,CANADA

[8] CALTECH,PASADENA,CA 91125

[9] UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093

[10] UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106

[11] CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213

[12] UNIV COLORADO,BOULDER,CO 80309

[13] CORNELL UNIV,ITHACA,NY 14853

[14] UNIV FLORIDA,GAINESVILLE,FL 32611

[15] HARVARD UNIV,CAMBRIDGE,MA 02138

[16] UNIV ILLINOIS,URBANA,IL 61801

[17] ITHACA COLL,ITHACA,NY 14850

[18] UNIV KANSAS,LAWRENCE,KS 66045

[19] UNIV MINNESOTA,MINNEAPOLIS,MN 55455

[20] SUNY ALBANY,ALBANY,NY 12222

[21] OHIO STATE UNIV,COLUMBUS,OH 43210

[22] UNIV OKLAHOMA,NORMAN,OK 73019

[23] PURDUE UNIV,W LAFAYETTE,IN 47907

[24] INP,NOVOSIBIRSK,RUSSIA

[25] UNIV HAWAII MANOA,HONOLULU,HI 96822

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.73.1079

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Branching ratios for the dominant Cabibbo-suppressed decays of the tau lepton have been measured by CLEO II in e+e- annihilation at the Cornell Electron Storage Ring (square-root s approximately 10.6 GeV) using kaons with momenta below 0.7 GeV/c. The inclusive branching ratio into one charged kaon is (1.60 +/- 0.12 +/- 0.19)%. For the exclusive decays, B(tau- --> K- nu(tau)) = (0.66 +/- 0.07 +/- 0.09)%, B(tau- --> K-pi0nu(tau) = (0.51 +/- 0.10 +/- 0.07)%, and, based on three events, B(tau- --> K-2pi0nu(tau) < 0.3% at the 90% confidence level. These represent significant improvements over previous results. B(tau- --> K- pi0nu(tau)) is measured for the first time with exclusive pi0 reconstruction.

引用

页码：1079 / 1083

页数：5

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