MEASUREMENT OF THE FORM-FACTOR RATIOS FOR D-](K)OVER-BAR(STAR-0)L(+)NU(L)()

Authors
AITALA EM AMATO S ANJOS JC APPEL JA ASHERY D BANERJEE S BEDIAGA I BLAYLOCK G BRACKER SB BURCHAT P BURNSTEIN RA CARTER T CARVALHO HS COPTY NK CREMALDI LM DARLING C DENISENKO K FERNANDEZ A FOX GF GAGNON P GOBEL C GOUNDER K HALLING AM HERRERA G HURVITS G JAMES C KASPER PA KWAN S LANGS DC LESLIE J LUNDBERG B MAYTALBECK S MEADOWS B NETO JRTD MIHALCEA D MILBURN RH DEMIRANDA JM NAPIER A NGUYEN A DOLIVEIRA AB OSHAUGHNESSY K PENG KC PERERA LP PUROHIT MV QUINN B RADEZTSKY S RAFATIAN A REAY NW REIDY JJ DOSREIS AC RUBIN HA SANDERS DA SANTHA AKS SANTORO AFS SCHWARTZ AJ SHEAFF M SIDWELL RA SLAUGHTER AJ SOKOLOFF MD SOLANO J STANTON NR STEFANSKI RJ STENSON K SUMMERS DJ TAKACH S THORNE K TRIPATHI AK WATANABE S WEISSBABAI R WIENER J WITCHEY N WOLIN E YI D YANG SM YOSHIDA S ZALIZNYAK R ZHANG C
Citation
Em. Aitala et al., MEASUREMENT OF THE FORM-FACTOR RATIOS FOR D-](K)OVER-BAR(STAR-0)L(+)NU(L)(), Physics letters. Section B, 440(3-4), 1998, pp. 435-441
Citations number
24
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
440
Issue
3-4
Year of publication
1998
Pages
435 - 441
Database
ISI
SICI code
0370-2693(1998)440:3-4<435:MOTFRF>2.0.ZU;2-D
Abstract
The form factor ratios r(V)= V(0)/A(1)(0), r(2)=A(2)(0)/A(1)(0) and r( 3)=A(3)(0)/A(1)(0) in the decay D+-->(K) over bar(0)l(+)nu(l) (K) ove r bar(0) --> K- pi(+) have been measured using data from charm hadrop roduction experiment E791 at Fermilab. From 3034 (595) signal (backgro und) events in the muon channel, we obtain r(V) = 1.84 +/- 0.11 +/- 0. 09, r(2) = 0.75 +/- 0.08 +/- 0.09 and, as a first measurement of r(3), we find 0.04 +/- 0.33 +/- 0.29. The values of the form factor ratios r(V) and r(2) measured for the muon channel are combined with the valu es of r(V) and r(2) that we have measured in the electron channel. The combined E791 results for the muon and electron channels are r(V)= 1. 87 +/- 0.08 +/- 0.07 and r(2) = 0.73 +/- 0.06 +/- 0.08. (C) 1998 Elsev ier Science B.V. All rights reserved.