Measurement of the B semileptonic branching fraction with lepton tags

B. Barish; M. Chadha; S. Chan; G. Eigen; J. S. Miller; C. O’grady; J. Urheim; A. J. Weinstein; F. Würthwein; D. M. Asner; M. Athanas; D. W. Bliss; W. S. Brower; G. Masek; H. P. Paar; J. Gronberg; C. M. Korte; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; D. Roberts; A. Ryd; H. Tajima; M. S. Witherell; R. Balest; K. Cho; W. T. Ford; M. Lohner; H. Park; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; M. Dickson; P. S. Drell; Y. Kubota; R. Poling; CLEO Collaboration

doi:10.1103/PhysRevLett.76.1570

Measurement of the B semileptonic branching fraction with lepton tags

B. Barish, M. Chadha, S. Chan, G. Eigen, J. S. Miller, C. O’grady, J. Urheim, A. J. Weinstein, F. Würthwein, D. M. Asner, M. Athanas, D. W. Bliss, W. S. Brower, G. Masek, H. P. Paar, J. Gronberg, C. M. Korte, R. Kutschke, S. Menary, R. J. MorrisonS. Nakanishi, H. N. Nelson, T. K. Nelson, C. Qiao, J. D. Richman, D. Roberts, A. Ryd, H. Tajima, M. S. Witherell, R. Balest, K. Cho, W. T. Ford, M. Lohner, H. Park, P. Rankin, J. G. Smith, J. P. Alexander, C. Bebek, B. E. Berger, K. Berkelman, K. Bloom, T. E. Browder, D. G. Cassel, H. A. Cho, D. M. Coffman, D. S. Crowcroft, M. Dickson, P. S. Drell, Y. Kubota, R. Poling, CLEO Collaboration

Physics and Astronomy (Twin Cities)

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Abstract

We have used the CLEO II detector and 2.06fb⁻¹ of ϒ(4S) data to measure the B-meson semileptonic branching fraction. The B → Xeν momentum spectrum was obtained over nearly the full momentum range by using charge and kinematic correlations in events with a high-momentum lepton tag and an additional electron. We find B (B → Xeν) = (10.49 ± 0.17 ± 0.43)%, with overall systematic uncertainties less than those of untagged single-lepton measurements. We use this result to calculate the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element V_cb and to set an upper limit on the fraction of ϒ(4S) decays to final states other than BB¯.

Original language	English (US)
Pages (from-to)	1570-1574
Number of pages	5
Journal	Physical review letters
Volume	76
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.76.1570
State	Published - Mar 4 1996

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10.1103/PhysRevLett.76.1570

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Barish, B., Chadha, M., Chan, S., Eigen, G., Miller, J. S., O’grady, C., Urheim, J., Weinstein, A. J., Würthwein, F., Asner, D. M., Athanas, M., Bliss, D. W., Brower, W. S., Masek, G., Paar, H. P., Gronberg, J., Korte, C. M., Kutschke, R., Menary, S., ... CLEO Collaboration (1996). Measurement of the B semileptonic branching fraction with lepton tags. Physical review letters, 76(10), 1570-1574. https://doi.org/10.1103/PhysRevLett.76.1570

Barish, B, Chadha, M, Chan, S, Eigen, G, Miller, JS, O’grady, C, Urheim, J, Weinstein, AJ, Würthwein, F, Asner, DM, Athanas, M, Bliss, DW, Brower, WS, Masek, G, Paar, HP, Gronberg, J, Korte, CM, Kutschke, R, Menary, S, Morrison, RJ, Nakanishi, S, Nelson, HN, Nelson, TK, Qiao, C, Richman, JD, Roberts, D, Ryd, A, Tajima, H, Witherell, MS, Balest, R, Cho, K, Ford, WT, Lohner, M, Park, H, Rankin, P, Smith, JG, Alexander, JP, Bebek, C, Berger, BE, Berkelman, K, Bloom, K, Browder, TE, Cassel, DG, Cho, HA, Coffman, DM, Crowcroft, DS, Dickson, M, Drell, PS, Kubota, Y, Poling, R & CLEO Collaboration 1996, 'Measurement of the B semileptonic branching fraction with lepton tags', Physical review letters, vol. 76, no. 10, pp. 1570-1574. https://doi.org/10.1103/PhysRevLett.76.1570

@article{8762b6e982ec46a09e82488f1e0542bf,

title = "Measurement of the B semileptonic branching fraction with lepton tags",

abstract = "We have used the CLEO II detector and 2.06fb−1 of ϒ(4S) data to measure the B-meson semileptonic branching fraction. The B → Xeν momentum spectrum was obtained over nearly the full momentum range by using charge and kinematic correlations in events with a high-momentum lepton tag and an additional electron. We find B (B → Xeν) = (10.49 ± 0.17 ± 0.43)%, with overall systematic uncertainties less than those of untagged single-lepton measurements. We use this result to calculate the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vcb and to set an upper limit on the fraction of ϒ(4S) decays to final states other than BB¯.",

author = "B. Barish and M. Chadha and S. Chan and G. Eigen and Miller, {J. S.} and C. O{\textquoteright}grady and J. Urheim and Weinstein, {A. J.} and F. W{\"u}rthwein and Asner, {D. M.} and M. Athanas and Bliss, {D. W.} and Brower, {W. S.} and G. Masek and Paar, {H. P.} and J. Gronberg and Korte, {C. M.} and R. Kutschke and S. Menary and Morrison, {R. J.} and S. Nakanishi and Nelson, {H. N.} and Nelson, {T. K.} and C. Qiao and Richman, {J. D.} and D. Roberts and A. Ryd and H. Tajima and Witherell, {M. S.} and R. Balest and K. Cho and Ford, {W. T.} and M. Lohner and H. Park and P. Rankin and Smith, {J. G.} and Alexander, {J. P.} and C. Bebek and Berger, {B. E.} and K. Berkelman and K. Bloom and Browder, {T. E.} and Cassel, {D. G.} and Cho, {H. A.} and Coffman, {D. M.} and Crowcroft, {D. S.} and M. Dickson and Drell, {P. S.} and Y. Kubota and R. Poling and {CLEO Collaboration}",

year = "1996",

month = mar,

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doi = "10.1103/PhysRevLett.76.1570",

language = "English (US)",

volume = "76",

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T1 - Measurement of the B semileptonic branching fraction with lepton tags

AU - Barish, B.

AU - Chadha, M.

AU - Chan, S.

AU - Eigen, G.

AU - Miller, J. S.

AU - O’grady, C.

AU - Urheim, J.

AU - Weinstein, A. J.

AU - Würthwein, F.

AU - Asner, D. M.

AU - Athanas, M.

AU - Bliss, D. W.

AU - Brower, W. S.

AU - Masek, G.

AU - Paar, H. P.

AU - Gronberg, J.

AU - Korte, C. M.

AU - Kutschke, R.

AU - Menary, S.

AU - Morrison, R. J.

AU - Nakanishi, S.

AU - Nelson, H. N.

AU - Nelson, T. K.

AU - Qiao, C.

AU - Richman, J. D.

AU - Roberts, D.

AU - Ryd, A.

AU - Tajima, H.

AU - Witherell, M. S.

AU - Balest, R.

AU - Cho, K.

AU - Ford, W. T.

AU - Lohner, M.

AU - Park, H.

AU - Rankin, P.

AU - Smith, J. G.

AU - Alexander, J. P.

AU - Bebek, C.

AU - Berger, B. E.

AU - Berkelman, K.

AU - Bloom, K.

AU - Browder, T. E.

AU - Cassel, D. G.

AU - Cho, H. A.

AU - Coffman, D. M.

AU - Crowcroft, D. S.

AU - Dickson, M.

AU - Drell, P. S.

AU - Kubota, Y.

AU - Poling, R.

AU - CLEO Collaboration

PY - 1996/3/4

Y1 - 1996/3/4

N2 - We have used the CLEO II detector and 2.06fb−1 of ϒ(4S) data to measure the B-meson semileptonic branching fraction. The B → Xeν momentum spectrum was obtained over nearly the full momentum range by using charge and kinematic correlations in events with a high-momentum lepton tag and an additional electron. We find B (B → Xeν) = (10.49 ± 0.17 ± 0.43)%, with overall systematic uncertainties less than those of untagged single-lepton measurements. We use this result to calculate the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vcb and to set an upper limit on the fraction of ϒ(4S) decays to final states other than BB¯.

AB - We have used the CLEO II detector and 2.06fb−1 of ϒ(4S) data to measure the B-meson semileptonic branching fraction. The B → Xeν momentum spectrum was obtained over nearly the full momentum range by using charge and kinematic correlations in events with a high-momentum lepton tag and an additional electron. We find B (B → Xeν) = (10.49 ± 0.17 ± 0.43)%, with overall systematic uncertainties less than those of untagged single-lepton measurements. We use this result to calculate the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vcb and to set an upper limit on the fraction of ϒ(4S) decays to final states other than BB¯.

UR - http://www.scopus.com/inward/record.url?scp=0001101721&partnerID=8YFLogxK

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U2 - 10.1103/PhysRevLett.76.1570

DO - 10.1103/PhysRevLett.76.1570

M3 - Article

AN - SCOPUS:0001101721

SN - 0031-9007

VL - 76

SP - 1570

EP - 1574

JO - Physical review letters

JF - Physical review letters

IS - 10

ER -

Measurement of the B semileptonic branching fraction with lepton tags

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