A measurement of the Michel parameters in leptonic decays of the tau

被引：12

作者：

Ammar, R

Baringer, P

Bean, A

Besson, D

Coppage, D

Darling, C

Davis, R

Hancock, N

Kotov, S

Kravchenko, I

Kwak, N

Anderson, S

Kubota, Y

Lattery, M

ONeill, JJ

Patton, S

Poling, R

Riehle, T

Savinov, V

Smith, A

Alam, MS

Athar, SB

Ling, Z

Mahmood, AH

Severini, H

Timm, S

Wappler, F

Anastassov, A

Blinov, S

Duboscq, JE

Fujino, D

Fulton, R

Gan, KK

Hart, T

Honscheid, K

Kagan, H

Kass, R

Lee, J

Spencer, MB

Sung, M

Undrus, A

Wanke, R

Wolf, A

Zoeller, MM

Nemati, B

Richichi, SJ

Ross, WR

Skubic, P

Wood, M

Bishai, M

机构：

[1] UNIV MINNESOTA,MINNEAPOLIS,MN 55455

[2] SUNY ALBANY,ALBANY,NY 12222

[3] OHIO STATE UNIV,COLUMBUS,OH 43210

[4] UNIV OKLAHOMA,NORMAN,OK 73019

[5] PURDUE UNIV,W LAFAYETTE,IN 47907

[6] UNIV ROCHESTER,ROCHESTER,NY 14627

[7] STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309

[8] SO METHODIST UNIV,DALLAS,TX 75275

[9] VANDERBILT UNIV,NASHVILLE,TN 37235

[10] SYRACUSE UNIV,SYRACUSE,NY 13244

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

[12] WAYNE STATE UNIV,DETROIT,MI 48202

[13] CALTECH,PASADENA,CA 91125

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

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

[16] UNIV COLORADO,BOULDER,CO 80309

[17] CORNELL UNIV,ITHACA,NY 14853

[18] UNIV FLORIDA,GAINESVILLE,FL 32611

[19] HARVARD UNIV,CAMBRIDGE,MA 02138

[20] UNIV HAWAII MANOA,HONOLULU,HI 96822

[21] UNIV ILLINOIS,CHAMPAIGN,IL 61801

[22] CARLETON UNIV,OTTAWA,ON K1S 5B6,CANADA

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

[24] MCGILL UNIV,MONTREAL,PQ H3A 2T8,CANADA

[25] ITHACA COLL,ITHACA,NY 14850

[26] BINP,RU-630090 NOVOSIBIRSK,RUSSIA

[27] LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551

[28] UNIV TEXAS,AUSTIN,TX 78712

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.78.4686

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the spectral shape Michel parameters rho and eta using leptonic decays of the tau, recorded by the CLEO II detector. Assuming e-mu universality in the vectorlike couplings, we find rho(e mu) = 0.735 +/- 0.013 +/- 0.008 and eta(e mu) = -0.015 +/- 0.061 +/- 0.062, where the first error is statistical and the second systematic. We also present measurements for the parameters for e and mu final states separately.

引用

页码：4686 / 4690

页数：5

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