MEASUREMENT OF THE D-]PI-PI BRANCHING FRACTIONS

被引：31

作者：

SELEN, M

SADOFF, AJ

AMMAR, R

BALL, S

BARINGER, P

COPPAGE, D

COPTY, N

DAVIS, R

HANCOCK, N

KELLY, M

KWAK, N

LAM, H

KUBOTA, Y

LATTERY, M

NELSON, JK

PATTON, S

PERTICONE, D

POLING, R

SAVINOV, V

SCHRENK, S

WANG, R

ALAM, MS

KIM, IJ

NEMATI, B

ONEILL, JJ

SEVERINI, H

SUN, CR

ZOELLER, MM

CRAWFORD, G

DAUBENMIER, CM

FULTON, R

FUJINO, D

GAN, KK

HONSCHEID, K

KAGAN, H

KASS, R

LEE, J

MALCHOW, R

MORROW, F

SKOVPEN, Y

SUNG, M

WHITE, C

WHITMORE, J

WILSON, P

BUTLER, F

FU, X

KALBFLEISCH, G

LAMBRECHT, M

ROSS, WR

SKUBIC, P

机构：

[1] ITHACA COLL,ITHACA,NY 14850

[2] UNIV KANSAS,LAWRENCE,KS 66045

[3] UNIV MINNESOTA,MINNEAPOLIS,MN 55455

[4] SUNY,ALBANY,NY 12222

[5] OHIO STATE UNIV,COLUMBUS,OH 43210

[6] UNIV OKLAHOMA,NORMAN,OK 73019

[7] PURDUE UNIV,W LAFAYETTE,IN 47907

[8] UNIV ROCHESTER,ROCHESTER,NY 14627

[9] SO METHODIST UNIV,DALLAS,TX 75275

[10] VANDERBILT UNIV,NASHVILLE,TN 37235

[11] CALTECH,PASADENA,CA 91125

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

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

[14] CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213

[15] UNIV COLORADO,BOULDER,CO 80309

[16] CORNELL UNIV,ITHACA,NY 14853

[17] UNIV FLORIDA,GAINESVILLE,FL 32611

[18] HARVARD UNIV,CAMBRIDGE,MA 02138

[19] SYRACUSE UNIV,SYRACUSE,NY 13244

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.71.1973

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using data from CLEO II at the Cornell Electron Storage Ring we provide a new measurement of the branching fraction for D0 --> pi+pi-, and we present the first measurements of D0 --> pi0pi0 and of D+ --> pi+pi0, which is due to an isospin changing DELTAI = 3/2 transition. From these data we extract the ratio of isospin amplitudes \A2/A0\, and the cosine of the relative phase delta = delta2 - delta0 between these amplitudes, for D --> pipi decays. Unlike the situation in kaon decay where A2 is strongly suppressed, we find \A2/A0\ = 0.72 +/- 0.13 +/- 0.11 and cos delta = 0.14 +/- 0.13 +/- 0.09.

引用

页码：1973 / 1977

页数：5

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