Measurement of the {ovr {ital B}} {r_arrow} {ital Dl}{ovr {nu} } Partial Width and Form Factor Parameters

Journal Article · Mon Sep 01 00:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.2208· OSTI ID:628705

Athanas, M; Avery, P; Jones, C D; Lohner, M; Prescott, C; Yelton, J; Zheng, J ^[1]; Brandenburg, G; Briere, R A; Ershov, A; Gao, Y S; Kim, D Y; Wilson, R; Yamamoto, H ^[2]; Browder, T E; Li, F; Li, Y; Rodriguez, J L ^[3]; Bergfeld, T; Eisenstein, B I ; Ernst, J; Gladding, G E; Gollin, G D; Hans, R M; Johnson, E; Karliner, I; Marsh, M A; Palmer, M; Selen, M; Thaler, J J ^[4]; Edwards, K W; Edwards, K W ^[5]; Bellerive, A; Bellerive, A; Janicek, R; Janicek, R; MacFarlane, D B; MacFarlane, D B; Patel, P M; Patel, P M ^[5]; Sadoff, A J ^[6]; Ammar, R; Baringer, P; Bean, A; Besson, D; Coppage, D; Darling, C; Davis, R; Hancock, N; Kotov, S; Kravchenko, I; Kwak, N ^[7]; Anderson, S; Kubota, Y; Lee, S J; ONeill, J J; Patton, S; Poling, R; Riehle, T; Savinov, V; Smith, A ^[8]; Alam, M S; Athar, S B; Ling, Z; Mahmood, A H; Severini, H; Timm, S; Wappler, F ^[9]; Anastassov, A; Blinov, S; Duboscq, J E; Fujino, D; Gan, K K; Hart, T; Honscheid, K; Kagan, H; Kass, R; Lee, J; Spencer, M B; Sung, M; Undrus, A; Wanke, R; Wolf, A; Zoeller, M M ^[10]; Nemati, B; Richichi, S J; Ross, W R; Skubic, P ^[11]; Bishai, M; Fast, J; Gerndt, E; Hinson, J W; Menon, N; Miller, D H; Shibata, E I; others, and

---

1. University of Florida, Gainesville, Florida 32611 (United States)
2. Harvard University, Cambridge, Massachusetts 02138 (United States)
3. University of Hawaii at Manoa, Honolulu, Hawaii 96822 (United States)
4. University of Illinois, Champaign-Urbana, Illinois 61801 (United States)
5. the Institute of Particle Physics (Canada)
6. Ithaca College, Ithaca, New York 14850 (United States)
7. University of Kansas, Lawrence, Kansas 66045 (United States)
8. University of Minnesota, Minneapolis, Minnesota 55455 (United States)
9. State University of New York at Albany, Albany, New York 12222 (United States)
10. Ohio State University, Columbus, Ohio 43210 (United States)
11. University of Oklahoma, Norman, Oklahoma 73019 (United States)

We have studied the decay {bar B}{r_arrow}Dl{bar {nu}} , where l=e or {mu} . From a fit to the differential decay rate d{Gamma}/dw we measure the rate normalization F{sub D}(1){vert_bar}V{sub cb}{vert_bar} and form factor slope {cflx {rho}}{sup 2}{sub D} , and, using measured values of {tau}{sub B} , find {Gamma}({bar B}{r_arrow}Dl{bar {nu}}) = (12.0{plus_minus}0.9{plus_minus}2.1) ns{sup {minus}1}. The resulting branching fractions are B({bar B}{sup 0}{r_arrow}D{sup +}l{sup {minus}}{bar {nu}})=(1.87{plus_minus}0.15{plus_minus} 0.32){percent} and B(B{sup {minus}}{r_arrow}D{sup 0} l{sup {minus}}{bar {nu}})=(1.94{plus_minus}0.15{plus_minus}0.34){percent} . The form factor parameters are in agreement with those measured in {bar B}{r_arrow}D{sup *}l{bar {nu}} decays, as predicted by heavy quark effective theory. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 628705
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANTI-D NEUTRAL MESONS
BRANCHING RATIO
FORM FACTORS
KOBAYASHI-MASKAWA MATRIX
LIFETIME
MATRIX ELEMENTS
QUARKS
SEMILEPTONIC DECAY
WIDTH