Study of the B0 semileptonic decay spectrum at the Y(4S) resonance

M. Artuso; A. Efimov; F. Frasconi; M. Gao; M. Goldberg; D. He; S. Kopp; G. C. Moneti; R. Mountain; Y. Mukhin; S. Schuh; T. Skwarnicki; S. Stone; G. Viehhauser; X. Xing; J. Bartelt; S. E. Csorna; V. Jain; S. Marka; A. Freyberger; R. Godang; K. Kinoshita; I. C. Lai; P. Pomianowski; S. Schrenk; G. Bonvicini; D. Cinabro; R. Greene; L. P. Perera; B. Barish; M. Chadha; S. Chan; G. Eigen; J. S. Miller; C. O'Grady; M. Schmidtler; J. Urheim; A. J. Weinstein; F. Würthwein; D. M. Asner; D. W. Bliss; W. S. Brower; G. Masek; H. P. Paar; V. Sharma; J. Gronberg; R. Kutschke; D. J. Lange; S. Menary; R. J. Morrison; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; D. Roberts; A. Ryd; M. S. Witherell; R. Balest; B. H. Behrens; K. Cho; W. T. Ford; H. Park; P. Rankin; J. Roy; J. G. Smith; J. P. Alexander; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; M. Dickson; P. S. Drell; K. M. Ecklund; R. Ehrlich; R. Elia; A. D. Foland; P. Gaidarev; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; P. I. Hopman; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; T. Lee; Y. Liu; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; M. Ogg

doi:10.1016/S0370-2693(97)00336-5

Study of the B⁰ semileptonic decay spectrum at the Y(4S) resonance

M. Artuso, A. Efimov, F. Frasconi, M. Gao, M. Goldberg, D. He, S. Kopp, G. C. Moneti, R. Mountain, Y. Mukhin, S. Schuh, T. Skwarnicki, S. Stone, G. Viehhauser, X. Xing, J. Bartelt, S. E. Csorna, V. Jain, S. Marka, A. FreybergerR. Godang, K. Kinoshita, I. C. Lai, P. Pomianowski, S. Schrenk, G. Bonvicini, D. Cinabro, R. Greene, L. P. Perera, B. Barish, M. Chadha, S. Chan, G. Eigen, J. S. Miller, C. O'Grady, M. Schmidtler, J. Urheim, A. J. Weinstein, F. Würthwein, D. M. Asner, D. W. Bliss, W. S. Brower, G. Masek, H. P. Paar, V. Sharma, J. Gronberg, R. Kutschke, D. J. Lange, S. Menary, R. J. Morrison, H. N. Nelson, T. K. Nelson, C. Qiao, J. D. Richman, D. Roberts, A. Ryd, M. S. Witherell, R. Balest, B. H. Behrens, K. Cho, W. T. Ford, H. Park, P. Rankin, J. Roy, J. G. Smith, J. P. Alexander, C. Bebek, B. E. Berger, K. Berkelman, K. Bloom, D. G. Cassel, H. A. Cho, D. M. Coffman, D. S. Crowcroft, M. Dickson, P. S. Drell, K. M. Ecklund, R. Ehrlich, R. Elia, A. D. Foland, P. Gaidarev, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, P. I. Hopman, J. Kandaswamy, N. Katayama, P. C. Kim, D. L. Kreinick, T. Lee, Y. Liu, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, C. R. Ng, E. Nordberg, M. Ogg

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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 reconstruction of B⁰ → D*^- l⁺v̄. This spectrum, measured with 2.38 fb^-1 of data collected at the Y(4S) resonance by the CLEO II detector, is compared directly to the inclusive lepton spectrum from all Y(4S) events in the same data set. These two spectra are consistent with having the same shape above 1.5 GeV/c. From the two spectra and two other CLEO measurements, we obtain the B⁰ and B⁺ semileptonic branching fractions, b₀ and b₊, their ratio, and the production ratio f_+-/f₀₀ of B⁺ and B⁰ pairs at the Y(4S). We report b₊/b₀ = 0.950^+0.117_-0.080 ± 0.091, b₀ = (10.78 ± 0.60 ± 0.69)%, and b₊ = (10.25 ± 0.57 ± 0.65)%. b₊/b₀ is equivalent to the ratio of charged to neutral B lifetimes, τ₊/τ₀.

Original language	English (US)
Pages (from-to)	321-328
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	399
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(97)00336-5
State	Published - May 1 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/S0370-2693(97)00336-5

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Artuso, M., Efimov, A., Frasconi, F., Gao, M., Goldberg, M., He, D., Kopp, S., Moneti, G. C., Mountain, R., Mukhin, Y., Schuh, S., Skwarnicki, T., Stone, S., Viehhauser, G., Xing, X., Bartelt, J., Csorna, S. E., Jain, V., Marka, S., ... Ogg, M. (1997). Study of the B⁰ semileptonic decay spectrum at the Y(4S) resonance. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 399(3-4), 321-328. https://doi.org/10.1016/S0370-2693(97)00336-5

@article{645b9413286a4d7e9ba490c6ee852b0b,

title = "Study of the B0 semileptonic decay spectrum at the Y(4S) resonance",

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 reconstruction of B0 → D*- l+{\=v}. This spectrum, measured with 2.38 fb-1 of data collected at the Y(4S) resonance by the CLEO II detector, is compared directly to the inclusive lepton spectrum from all Y(4S) events in the same data set. These two spectra are consistent with having the same shape above 1.5 GeV/c. From the two spectra and two other CLEO measurements, we obtain the B0 and B+ semileptonic branching fractions, b0 and b+, their ratio, and the production ratio f+-/f00 of B+ and B0 pairs at the Y(4S). We report b+/b0 = 0.950+0.117-0.080 ± 0.091, b0 = (10.78 ± 0.60 ± 0.69)%, and b+ = (10.25 ± 0.57 ± 0.65)%. b+/b0 is equivalent to the ratio of charged to neutral B lifetimes, τ+/τ0.",

author = "M. Artuso and A. Efimov and F. Frasconi and M. Gao and M. Goldberg and D. He and S. Kopp and Moneti, {G. C.} and R. Mountain and Y. Mukhin and S. Schuh and T. Skwarnicki and S. Stone and G. Viehhauser and X. Xing and J. Bartelt and Csorna, {S. E.} and V. Jain and S. Marka and A. Freyberger and R. Godang and K. Kinoshita and Lai, {I. C.} and P. Pomianowski and S. Schrenk and G. Bonvicini and D. Cinabro and R. Greene and Perera, {L. P.} and B. Barish and M. Chadha and S. Chan and G. Eigen and Miller, {J. S.} and C. O'Grady and M. Schmidtler and J. Urheim and Weinstein, {A. J.} and F. W{\"u}rthwein and Asner, {D. M.} and Bliss, {D. W.} and Brower, {W. S.} and G. Masek and Paar, {H. P.} and V. Sharma and J. Gronberg and R. Kutschke and Lange, {D. J.} and S. Menary and Morrison, {R. J.} and Nelson, {H. N.} and Nelson, {T. K.} and C. Qiao and Richman, {J. D.} and D. Roberts and A. Ryd and Witherell, {M. S.} and R. Balest and Behrens, {B. H.} and K. Cho and Ford, {W. T.} and H. Park and P. Rankin and J. Roy and Smith, {J. G.} and Alexander, {J. P.} and C. Bebek and Berger, {B. E.} and K. Berkelman and K. Bloom and Cassel, {D. G.} and Cho, {H. A.} and Coffman, {D. M.} and Crowcroft, {D. S.} and M. Dickson and Drell, {P. S.} and Ecklund, {K. M.} and R. Ehrlich and R. Elia and Foland, {A. D.} and P. Gaidarev and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and Hopman, {P. I.} and J. Kandaswamy and N. Katayama and Kim, {P. C.} and Kreinick, {D. L.} and T. Lee and Y. Liu and Ludwig, {G. S.} and J. Masui and J. Mevissen and Mistry, {N. B.} and Ng, {C. R.} and E. Nordberg and M. Ogg",

note = "Funding Information: acknowledge the effort of the CESR us with excellent luminosity and run-J.P.A., J.R.P., and I.P.J.S. thank the the NSF, M.S. thanks the PFF pro- Funding Information: gram of the NSF, G.E. thanks the Heisenberg Foundation, K.K.G., M.S., H.N.N., T.S., and H.Y. thank the OJI program of DOE, J.R.P., K.H., MS. and V.S. thank the A.P. Sloan Foundation, and A.W. and R.W. thank the Alexander von Humboldt Stiftung for support. M.S. is supported as a Cottrell Scholar of Research Corporation. This work was supported by the National Science Foundation, the US Department of Energy, and the Natural Sciences and Engineering Research Council of Canada.",

year = "1997",

month = may,

day = "1",

doi = "10.1016/S0370-2693(97)00336-5",

language = "English (US)",

volume = "399",

pages = "321--328",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "3-4",

}

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, O'Grady, C, Schmidtler, M, Urheim, J, Weinstein, AJ, Würthwein, F, Asner, DM, 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 1997, 'Study of the B⁰ semileptonic decay spectrum at the Y(4S) resonance', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 399, no. 3-4, pp. 321-328. https://doi.org/10.1016/S0370-2693(97)00336-5

TY - JOUR

T1 - Study of the B0 semileptonic decay spectrum at the Y(4S) resonance

AU - Artuso, M.

AU - Efimov, A.

AU - Frasconi, F.

AU - Gao, M.

AU - Goldberg, M.

AU - He, D.

AU - Kopp, S.

AU - Moneti, G. C.

AU - Mountain, R.

AU - Mukhin, Y.

AU - Schuh, S.

AU - Skwarnicki, T.

AU - Stone, S.

AU - Viehhauser, G.

AU - Xing, X.

AU - Bartelt, J.

AU - Csorna, S. E.

AU - Jain, V.

AU - Marka, S.

AU - Freyberger, A.

AU - Godang, R.

AU - Kinoshita, K.

AU - Lai, I. C.

AU - Pomianowski, P.

AU - Schrenk, S.

AU - Bonvicini, G.

AU - Cinabro, D.

AU - Greene, R.

AU - Perera, L. P.

AU - Barish, B.

AU - Chadha, M.

AU - Chan, S.

AU - Eigen, G.

AU - Miller, J. S.

AU - O'Grady, C.

AU - Schmidtler, M.

AU - Urheim, J.

AU - Weinstein, A. J.

AU - Würthwein, F.

AU - Asner, D. M.

AU - Bliss, D. W.

AU - Brower, W. S.

AU - Masek, G.

AU - Paar, H. P.

AU - Sharma, V.

AU - Gronberg, J.

AU - Kutschke, R.

AU - Lange, D. J.

AU - Menary, S.

AU - Morrison, R. J.

AU - Nelson, H. N.

AU - Nelson, T. K.

AU - Qiao, C.

AU - Richman, J. D.

AU - Roberts, D.

AU - Ryd, A.

AU - Witherell, M. S.

AU - Balest, R.

AU - Behrens, B. H.

AU - Cho, K.

AU - Ford, W. T.

AU - Park, H.

AU - Rankin, P.

AU - Roy, J.

AU - Smith, J. G.

AU - Alexander, J. P.

AU - Bebek, C.

AU - Berger, B. E.

AU - Berkelman, K.

AU - Bloom, K.

AU - Cassel, D. G.

AU - Cho, H. A.

AU - Coffman, D. M.

AU - Crowcroft, D. S.

AU - Dickson, M.

AU - Drell, P. S.

AU - Ecklund, K. M.

AU - Ehrlich, R.

AU - Elia, R.

AU - Foland, A. D.

AU - Gaidarev, P.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Hopman, P. I.

AU - Kandaswamy, J.

AU - Katayama, N.

AU - Kim, P. C.

AU - Kreinick, D. L.

AU - Lee, T.

AU - Liu, Y.

AU - Ludwig, G. S.

AU - Masui, J.

AU - Mevissen, J.

AU - Mistry, N. B.

AU - Ng, C. R.

AU - Nordberg, E.

AU - Ogg, M.

N1 - Funding Information: acknowledge the effort of the CESR us with excellent luminosity and run-J.P.A., J.R.P., and I.P.J.S. thank the the NSF, M.S. thanks the PFF pro- Funding Information: gram of the NSF, G.E. thanks the Heisenberg Foundation, K.K.G., M.S., H.N.N., T.S., and H.Y. thank the OJI program of DOE, J.R.P., K.H., MS. and V.S. thank the A.P. Sloan Foundation, and A.W. and R.W. thank the Alexander von Humboldt Stiftung for support. M.S. is supported as a Cottrell Scholar of Research Corporation. This work was supported by the National Science Foundation, the US Department of Energy, and the Natural Sciences and Engineering Research Council of Canada.

PY - 1997/5/1

Y1 - 1997/5/1

N2 - We have made a first measurement of the lepton momentum spectrum in a sample of events enriched in neutral B's through a partial reconstruction of B0 → D*- l+v̄. This spectrum, measured with 2.38 fb-1 of data collected at the Y(4S) resonance by the CLEO II detector, is compared directly to the inclusive lepton spectrum from all Y(4S) events in the same data set. These two spectra are consistent with having the same shape above 1.5 GeV/c. From the two spectra and two other CLEO measurements, we obtain the B0 and B+ semileptonic branching fractions, b0 and b+, their ratio, and the production ratio f+-/f00 of B+ and B0 pairs at the Y(4S). We report b+/b0 = 0.950+0.117-0.080 ± 0.091, b0 = (10.78 ± 0.60 ± 0.69)%, and b+ = (10.25 ± 0.57 ± 0.65)%. b+/b0 is equivalent to the ratio of charged to neutral B lifetimes, τ+/τ0.

AB - We have made a first measurement of the lepton momentum spectrum in a sample of events enriched in neutral B's through a partial reconstruction of B0 → D*- l+v̄. This spectrum, measured with 2.38 fb-1 of data collected at the Y(4S) resonance by the CLEO II detector, is compared directly to the inclusive lepton spectrum from all Y(4S) events in the same data set. These two spectra are consistent with having the same shape above 1.5 GeV/c. From the two spectra and two other CLEO measurements, we obtain the B0 and B+ semileptonic branching fractions, b0 and b+, their ratio, and the production ratio f+-/f00 of B+ and B0 pairs at the Y(4S). We report b+/b0 = 0.950+0.117-0.080 ± 0.091, b0 = (10.78 ± 0.60 ± 0.69)%, and b+ = (10.25 ± 0.57 ± 0.65)%. b+/b0 is equivalent to the ratio of charged to neutral B lifetimes, τ+/τ0.

UR - http://www.scopus.com/inward/record.url?scp=0039375153&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0039375153&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(97)00336-5

DO - 10.1016/S0370-2693(97)00336-5

M3 - Article

AN - SCOPUS:0039375153

SN - 0370-2693

VL - 399

SP - 321

EP - 328

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -

Study of the B⁰ semileptonic decay spectrum at the Y(4S) resonance

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