MEASUREMENT OF THE D-]PI-PI BRANCHING FRACTIONS

Authors
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 SNOW J WANG PL WOOD M BORTOLETTO D BROWN DN FAST J MCILWAIN RL MIAO T MILLER DH MODESITT M SCHAFFNER SF SHIBATA EI SHIPSEY IPJ WANG PN BATTLE M ERNST J KROHA H ROBERTS S SPARKS K THORNDIKE EH WANG CH DOMINICK J SANGHERA S SKWARNICKI T STROYNOWSKI R ARTUSO M HE D GOLDBERG M HORWITZ N KENNETT 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 SHELDON P AKERIB DS BARISH B CHADHA M CHAN S COWEN DF EIGEN G MILLER JS OGRADY C URHEIM J WEINSTEIN AJ ACOSTA D ATHANAS M MASEK G ONG B PAAR H SIVERTZ M BEAN A GRONBERG J KUTSCHKE R MENARY S MORRISON RJ NAKANISHI S NELSON HN NELSON TK RICHMAN JD RYD A TAJIMA H SCHMIDT D SPERKA D WITHERELL MS PROCARIO M YANG S BALEST R CHO K DAOUDI M FORD WT JOHNSON DR LINGEL K LOHNER M RANKIN P SMITH JG ALEXANDER JP BEBEK C BERKELMAN K BESSON D BROWDER TE CASSEL DG CHO HA COFFMAN DM DRELL PS EHRLICH R GARCIASCIVERES M GEISER B GITTELMAN B GRAY SW HARTILL DL HELTSLEY BK JONES CD JONES SL KANDASWAMY J KATAYAMA N KIM PC KREINICK DL LUDWIG GS MASUI J MEVISSEN J MISTRY NB NG CR NORDBERG E OGG M PATTERSON JR PETERSON D RILEY D SALMAN S SAPPER M WORDEN H WURTHWEIN F AVERY P FREYBERGER A RODRIGUEZ J STEPHENS R YELTON J CINABRO D HENDERSON S KINOSHITA K LIU T SAULNIER M SHEN F WILSON R YAMAMOTO H
Citation
M. Selen et al., MEASUREMENT OF THE D-]PI-PI BRANCHING FRACTIONS, Physical review letters, 71(13), 1993, pp. 1973-1977
Citations number
16
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
71
Issue
13
Year of publication
1993
Pages
1973 - 1977
Database
ISI
SICI code
0031-9007(1993)71:13<1973:MOTDBF>2.0.ZU;2-O
Abstract
Using data from CLEO II at the Cornell Electron Storage Ring we provid e a new measurement of the branching fraction for D0 --> pi+pi-, and w e present the first measurements of D0 --> pi0pi0 and of D+ --> pi+pi0 , which is due to an isospin changing DELTAI = 3/2 transition. From th ese data we extract the ratio of isospin amplitudes \A2/A0\, and the c osine of the relative phase delta = delta2 - delta0 between these ampl itudes, for D --> pipi decays. Unlike the situation in kaon decay wher e A2 is strongly suppressed, we find \A2/A0\ = 0.72 +/- 0.13 +/- 0.11 and cos delta = 0.14 +/- 0.13 +/- 0.09.