Study of exclusive charmless semileptonic B decays and extraction of |Vub| at CLEO

被引：6

作者：

Asner, D. M. ^{[1
]}

Edwards, K. W.

Briere, R. A.

Ferguson, T.

Tatishvili, G.

Vogel, H.

Watkins, M. E.

Rosner, J. L.

Adam, N. E.

Alexander, J. P.

Cassel, D. G.

Duboscq, J. E.

Ehrlich, R.

Fields, L.

Gibbons, L.

Gray, R.

Gray, S. W.

Hartill, D. L.

Heltsley, B. K.

Hertz, D.

Jones, C. D.

Kandaswamy, J.

Kreinick, D. L.

Kuznetsov, V. E.

Mahlke-Krueger, H.

Meyer, T. O.

Onyisi, P. U. E.

Patterson, J. R.

Peterson, D.

Pivarski, J.

Riley, D.

Ryd, A.

Sadoff, A. J.

Schwarthoff, H.

Shi, X.

Stroiney, S.

Sun, W. M.

Wilksen, T.

Weinberger, M.

Athar, S. B.

Patel, R.

Potlia, V.

Yelton, J.

Rubin, P.

Cawlfield, C.

Eisenstein, B. I.

Karliner, I.

Kim, D.

Lowrey, N.

Naik, P.

机构：

[1] Carleton Univ, Ottawa, ON K1S 5B6, Canada

[2] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[3] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[4] Cornell Univ, Ithaca, NY 14853 USA

[5] Univ Florida, Gainesville, FL 32611 USA

[6] George Mason Univ, Fairfax, VA 22030 USA

[7] Univ Illinois, Urbana, IL 61801 USA

[8] Indiana Univ, Bloomington, IN 47405 USA

[9] Univ Kansas, Lawrence, KS 66045 USA

[10] Luther Coll, Iowa City, IA 52101 USA

[11] Univ Minnesota, Minneapolis, MN 55455 USA

[12] Northwestern Univ, Evanston, IL 60208 USA

[13] SUNY Albany, Albany, NY 12222 USA

[14] SUNY Buffalo, Buffalo, NY 14260 USA

[15] Univ Oklahoma, Norman, OK 73019 USA

[16] Univ Pittsburgh, Pittsburgh, PA 15260 USA

[17] Univ Puerto Rico, Mayaguez, PR 00681 USA

[18] Purdue Univ, W Lafayette, IN 47907 USA

[19] Rensselaer Polytech Inst, Troy, NY 12180 USA

[20] Univ Rochester, Rochester, NY 14627 USA

[21] So Methodist Univ, Dallas, TX 75275 USA

[22] Syracuse Univ, Syracuse, NY 13244 USA

[23] Wayne State Univ, Detroit, MI 48202 USA

来源：

PHYSICAL REVIEW D | 2007年 / 76卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.76.012007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have studied semileptonic B decay to the exclusive charmless states pi, rho/omega, eta and eta(') using the full 15.5 fb(-1) CLEO Upsilon(4S) sample, with measurements performed in subregions of phase space to minimize dependence on a priori knowledge of the form factors involved. We find total branching fractions B(B-0 ->pi(-)l(+)nu)=(1.37 +/- 0.15(stat)+/- 0.11(sys))x10(-4) and B(B-0 ->rho(-l+)nu)=(2.93 +/- 0.37(stat)+/- 0.37(sys))x10(-4). We find evidence for B+->eta('l+)nu, with B(B+->eta('l+)nu)=(2.66 +/-+/- 0.80(stat)+/- 0.56(sys))x10(-4) and 1.20x10(-4)< B(B+->eta('l+)nu)< 4.46x10(-4) (90% CL). We also limit B(B+->eta(l+)nu)< 1.01x10(-4) (90% CL). By combining our B ->pi l nu information with unquenched lattice calculations, we find |V-ub|=(3.6 +/- 0.4(stat)+/- 0.2(sys-0.4thy)(+0.6))x10(-3).

引用

页数：22

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