STUDY OF THE B-0 SEMILEPTONIC DECAY SPECTRUM AT THE Y(4S) RESONANCE

Authors
ARTUSO M EFIMOV A FRASCONI F GAO M GOLDBERG M HE D KOPP S MONETI GC MOUNTAIN R MUKHIN Y SCHUH S SKWARNICKI T STONE S VIEHHAUSER G XING X BARTELT J CSORNA SE JAIN V MARKA S FREYBERGER A GODANG R KINOSHITA K LAI IC POMIANOWSKI P SCHRENK S BONVICINI G CINABRO D GREENE R PERERA LP BARISH B CHADHA M CHAN S EIGEN G MILLER JS OGRADY C SCHMIDTLER M URHEIM J WEINSTEIN AJ WURTHWEIN F ASNER D BLISS DW BROWER WS MASEK G PAAR HP SHARMA V GRONBERG J KUTSCHKE R LANGE DJ MENARY S MORRISON RJ NELSON HN NELSON TK QIAO C RICHMAN JD ROBERTS D RYD A WITHERELL MS BALEST R BEHRENS BH CHO K FORD WT PARK H RANKIN P ROY J SMITH JG ALEXANDER JP BEBEK C BERGER BE BERKELMAN K BLOOM K CASSEL DG CHO HA COFFMAN DM CROWCROFT DS DICKSON M DRELL PS ECKLUND KM EHRLICH R ELIA R FOLAND AD GAIDAREV P GITTELMAN B GRAY SW HARTILL DL HELTSLEY BK HOPMAN PI KANDASWAMY J KATAYAMA N KIM PC KREINICK DL LEE T LIU Y LUDWIG GS MASUI J MEVISSEN J MISTRY NB NG CR NORDBERG E OGG M PATTERSON JR PETERSON D RILEY D SOFFER A WARD C ATHANAS M AVERY P JONES CD LOHNER M PRESCOTT C YANG S YELTON J ZHENG J BRANDENBURG G BRIERE RA GAO YS KIM DYJ WILSON R YAMAMOTO H BROWDER TE LI F LI Y RODRIGUEZ JL BERGFELD T EISENSTEIN BI ERNST J GLADDING GE GOLLIN GD HANS RM JOHNSON E KARLINER I MARSH MA PALMER M SELEN M THALER JJ EDWARDS KW BELLERIVE A JANICEK R MACFARLANE DB MCLEAN KW PATEL PM SADOFF AJ 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 FISHER KD 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 FAST J GERNDT E HINSON JW MENON N MILLER DH SHIBATA EI SHIPSEY IPJ YURKO M GIBBONS L JOHNSON SD KWON J ROBERTS S THORNDIKE EH JESSOP CP LINGEL K MARSISKE H PERL ML SCHAFFNER SF UGOLINI D WANG R ZHOU X COAN TE FADEYEV V KOROLKOV I MARAVIN Y NARSKY I SHELKOV V STAECK J STROYNOWSKI R VOLOBOUEV I YE J
Citation
M. Artuso et al., STUDY OF THE B-0 SEMILEPTONIC DECAY SPECTRUM AT THE Y(4S) RESONANCE, Physics letters. Section B, 399(3-4), 1997, pp. 321-328
Citations number
15
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
399
Issue
3-4
Year of publication
1997
Pages
321 - 328
Database
ISI
SICI code
0370-2693(1997)399:3-4<321:SOTBSD>2.0.ZU;2-A
Abstract
We have made a first measurement of the lepton momentum spectrum in a sample of events enriched in neutral B's through a partial reconstruct ion of B-0 --> D(-)l(+)<(nu)over bar>. This spectrum, measured with 2 .38 fb(-1) of data collected at the Y(4S) resonance by the CLEO II det ector, is compared directly to the inclusive lepton spectrum from all Y(4S) events in the same data set. These two spectra are consistent wi th having the same shape above 1.5 GeV/c. From the two spectra and two other CLEO measurements, we obtain the B-0 and B+ semileptonic branch ing fractions, b(0) and b(+), their ratio, and the production ratio f( +-)/f(00) of B+ and B-0 pairs at the Y(4S). We report b(+)/b(0) = 0.95 0(-0.080) (+0.117) +/- 0.091, b(0) = (10.78 +/- 0.60 +/- 0.69)%, and b (+) = (10.25 +/- 0.57 +/- 0.65)%. b(+)/b(0) is equivalent to the ratio of charged to neutral B lifetimes, tau(+)/tau(0). (C) 1997 Published by Elsevier Science B.V.