LEPTON ASYMMETRY MEASUREMENTS IN (B)OVER-BAR-]D-ASTERISK-L-(NU)OVER-BAR-L AND IMPLICATIONS FOR V-A AND THE FORM-FACTORS

被引：36

作者：

SANGHERA, S

SKWARNICKI, T

STROYNOWSKI, R

ARTUSO, M

GOLDBERG, M

HORWITZ, N

KENNETT, R

MONETI, GC

MUHEIM, F

PLAYFER, S

ROZEN, Y

RUBIN, P

STONE, S

THULASIDAS, M

YAO, WM

ZHU, G

BARNES, AV

BARTELT, J

CSORNA, SE

EGYED, Z

JAIN, V

SHELDON, P

AKERIB, DS

BARISH, B

CHADHA, M

COWEN, DF

EIGEN, G

MILLER, JS

URHEIM, J

WEINSTEIN, AJ

ACOSTA, D

MASEK, G

ONG, B

PAAR, H

SIVERTZ, M

BEAN, A

GRONBERG, J

KUTSCHKE, R

MENARY, S

MORRISON, RJ

NELSON, H

RICHMAN, J

TAJIMA, H

SCHMIDT, D

SPERKA, D

WITHERELL, M

PROCARIO, M

DAOUDI, M

FORD, WT

JOHNSON, DR

机构：

[1] SYRACUSE UNIV,SYRACUSE,NY 13244

[2] VANDERBILT UNIV,NASHVILLE,TN 37235

[3] CALTECH,PASADENA,CA 91125

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

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

[6] CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213

[7] UNIV COLORADO,BOULDER,CO 80309

[8] CORNELL UNIV,ITHACA,NY 14853

[9] UNIV FLORIDA,GAINESVILLE,FL 32611

[10] HARVARD UNIV,CAMBRIDGE,MA 02138

[11] ITHACA COLL,ITHACA,NY 14850

[12] UNIV KANSAS,LAWRENCE,KS 66045

[13] UNIV MINNESOTA,MINNEAPOLIS,MN 55455

[14] SUNY ALBANY,ALBANY,NY 12222

[15] OHIO STATE UNIV,COLUMBUS,OH 43210

[16] UNIV OKLAHOMA,NORMAN,OK 73019

[17] PURDUE UNIV,W LAFAYETTE,IN 47907

[18] UNIV ROCHESTER,ROCHESTER,NY 14627

来源：

PHYSICAL REVIEW D | 1993年 / 47卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.47.791

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a measurement of the lepton decay asymmetry A(fb) in the reaction BBAR --> D*l-v(l)BAR using data collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The value of A(fb) confirms that the chirality of the weak interaction is predominantly left-handed in b --> c transitions as expected in the standard model, if it is assumed that the lepton current is also left-handed. Using A(fb) and the previously determined branching ratio, q2 distribution, and D* polarization, we obtain the first measurement of the form-factor ratios that are used to describe this semileptonic decay.

引用

页码：791 / 798

页数：8

共 19 条

[1] Measurement of D*+ polarization in the decay (B)over-bar0 -> D*+l-v [J].

ALBRECHT, H ;

BOCKMANN, P ;

GLASER, R ;

HARDER, G ;

KRUGER, A ;

NIPPE, A ;

REIDENBACH, M ;

SCHAFER, M ;

SCHMIDT-PARZEFALL, W ;

SCHRODER, H ;

SCHULZ, HD ;

SEFKOW, F ;

SPENGLER, J ;

WURTH, R ;

APPUHN, RD ;

DRESCHER, A ;

HAST, C ;

HERRERA, G ;

KAMP, D ;

KOLANOSKI, H ;

LINDNER, A ;

MANKEL, R ;

SCHECK, H ;

SCHWEDA, G ;

SPAAN, B ;

WALTHER, A ;

WEGENER, D ;

VOLLAND, U ;

WEGENER, H ;

FUNK, W ;

GABRIEL, JC ;

STIEWE, J ;

WERNER, S ;

CHARLESWORTH, CEK ;

EDWARDS, KW ;

FRISKEN, WR ;

KAPITZA, H ;

KUTSCHKE, R ;

MACFARLANE, DB ;

McLEAN, KW ;

NILSSON, AW ;

ORR, RS ;

PARSONS, JA ;

PATEL, PM ;

PRENTICE, JD ;

SEIDEL, SC ;

SWAIN, JD ;

TSIPOLITIS, G ;

YOON, TS ;

AMMAR, R .

PHYSICS LETTERS B, 1989, 219 (01) :121-126

[2] WEAK MIXING ANGLES FROM SEMILEPTONIC DECAYS IN THE QUARK-MODEL - COMMENT [J].

ALTOMARI, T ;

WOLFENSTEIN, L .

PHYSICAL REVIEW LETTERS, 1987, 58 (15) :1583-1583

[3]

BARBIELLINI G, 1988, RIV NUOVO CIMENTO, V9, P1

[4] FORMFACTOR EFFECTS IN EXCLUSIVE D-DECAYS AND B-DECAY [J].

BAUER, M ;

WIRBEL, M .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1989, 42 (04) :671-678

[5] STUDY OF THE DECAY BBARO-]D-STAR+L-VBAR [J].

BORTOLETTO, D ;

GOLDBERG, M ;

HORWITZ, N ;

MESTAYER, MD ;

MONETI, GC ;

SHARMA, V ;

SHIPSEY, IPJ ;

SKWARNICKI, T ;

CSORNA, SE ;

LETSON, T ;

BROCK, IC ;

FERGUSON, T ;

ALEXANDER, J ;

ARTUSO, M ;

BEBEK, C ;

BERKELMAN, K ;

CASSEL, DG ;

CHEU, E ;

COFFMAN, DM ;

CRAWFORD, G ;

DEWIRE, JW ;

DRELL, PS ;

EHRLICH, R ;

GALIK, RS ;

GITTELMAN, B ;

GRAY, SW ;

HALLING, AM ;

HARTILL, DL ;

HELTSLEY, BK ;

KANDASWAMY, J ;

KOWALEWSKI, R ;

KREINICK, DL ;

KUBOTA, Y ;

LEWIS, JD ;

MISTRY, NB ;

MUELLER, J ;

NAMJOSHI, R ;

NANDI, S ;

NORDBERG, E ;

OGRADY, C ;

PETERSON, D ;

PISHARODY, M ;

RILEY, D ;

SAPPER, M ;

SILVERMAN, A ;

STONE, S ;

WORDEN, H ;

WORRIS, M ;

SADOFF, AJ ;

AVERY, P .

PHYSICAL REVIEW LETTERS, 1989, 63 (16) :1667-1670

[6] FACTORIZATION TEST USING BBARO-] D-STAR+PI- AND AN ESTIMATE OF FDS USING B-]DDS- [J].

BORTOLETTO, D ;

STONE, S .

PHYSICAL REVIEW LETTERS, 1990, 65 (24) :2951-2954

[7] DESIGN AND CONSTRUCTION OF THE CLEO-II DRIFT CHAMBER [J].

CASSEL, DG ;

DESALVO, R ;

DOBBINS, J ;

GILCHRIESE, MGD ;

GRAY, S ;

HARTILL, D ;

MUELLER, J ;

PETERSON, D ;

PISHARODY, M ;

RILEY, D ;

KINOSHITA, K .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1986, 252 (2-3) :325-330

[8] TESTING THE CHIRALITY OF B TO C COUPLING IN B-]D-ASTERISK-L-NU [J].

GRONAU, M ;

WAKAIZUMI, S .

PHYSICS LETTERS B, 1992, 280 (1-2) :79-84

[9] DOES THE B-QUARK DECAY LEFT-HANDEDLY [J].

GRONAU, M ;

WAKAIZUMI, S .

PHYSICAL REVIEW LETTERS, 1992, 68 (12) :1814-1817

[10]

HERNANDEZ JJ, 1990, PHYS LETT B, V239, P1

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