STUDY OF THE DECAYS D-]K-PI-PI-EV AND D-]K-STAR-PI-EV

被引：7

作者：

ANJOS, JC

APPEL, JA

BEAN, A

BRACKER, SB

BROWDER, TE

CREMALDI, LM

DUBOSCQ, JE

ELLIOTT, JR

ESCOBAR, CO

GIBNEY, MC

HARTNER, GF

HUBER, J

KARCHIN, PE

KUMAR, BR

LOSTY, MJ

LUSTE, GJ

MANTSCH, PM

MARTIN, JF

MCHUGH, S

MENARY, SR

MORRISON, RJ

NASH, T

PINFOLD, J

PUNKAR, G

PUROHIT, MV

ROSS, WR

SANTORO, AFS

SCHMIDT, DM

SHOUP, AL

SLIWA, K

SOKOLOFF, MD

SOUZA, MHG

SPERKA, DJ

STREETMAN, ME

STUNDZIA, AB

WITHERELL, MS

机构：

[1] UNIV CALIF SANTA BARBARA, SANTA BARBARA, CA 93106 USA

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

[3] UNIV CINCINNATI, CINCINNATI, OH 45221 USA

[4] UNIV COLORADO, BOULDER, CO 80309 USA

[5] FERMI NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA

[6] NATL RES COUNCIL CANADA, OTTAWA K1A 0R6, ONTARIO, CANADA

[7] PRINCETON UNIV, PRINCETON, NJ 08544 USA

[8] UNIV SAO PAULO, SAO PAULO, BRAZIL

[9] UNIV TORONTO, TORONTO M5S 1A7, ONTARIO, CANADA

[10] UNIV MISSISSIPPI, OXFORD, MS 38677 USA

[11] YALE UNIV, NEW HAVEN, CT 06511 USA

来源：

PHYSICAL REVIEW D | 1992年 / 45卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.45.R2177

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have searched for the exclusive semileptonic decay modes D+ --> K-pi-pi-eBAR+ nu(e) and D+ --> KBAR* pi-e+ nu(e) in the data from the Fermilab photoproduction experiment E691. With good sensitivity, we observe no signals in the channels D+ --> K- pi+pi(0)e+ nu(e) and D+ --> K0BAR pi+pi-e+ nu(e), and set upper limits of B(D+ --> all K*BAR pi-e+ nu(e)) < 1.2% and B(D+ --> all K-pi-pi-eBAR+ nu(e)) < 0.9%, at the 90% confidence level. (For these limits we use isospin invariance to extract limits which include all charge states.) These modes are expected to be the most common semileptonic decays next to the dominant Ke+BAR v(e) and K*E+BAR v(e), but the observed limits represent a small fraction of the inclusive semileptonic branching ratio of (17.0 +/- 1.9 +/- 1.7)%.

引用

页码：R2177 / R2180

页数：4

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