Measurement of lepton momentum moments in the decay B̄ → Xℓv̄ and determination of the heavy quark expansion parameters and |Vcb|

A. H. Mahmood; S. E. Csorna; I. Danko; G. Bonvicini; D. Cinabro; M. Dubrovin; S. McGee; A. Bornheim; E. Lipeles; S. P. Pappas; A. Shapiro; W. M. Sun; A. J. Weinstein; R. A. Briere; G. P. Chen; T. Ferguson; G. Tatishvili; H. Vogel; N. E. Adam; J. P. Alexander; K. Berkelman; V. Boisvert; D. G. Cassel; P. S. Drell; J. E. Duboscq; K. M. Ecklund; R. Ehrlich; R. S. Galik; L. Gibbons; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; L. Hsu; C. D. Jones; J. Kandaswamy; D. L. Kreinick; A. Magerkurth; H. Mahlke-Krüger; T. O. Meyer; N. B. Mistry; J. R. Patterson; D. Peterson; J. Pivarski; S. J. Richichi; D. Riley; A. J. Sadoff; H. Schwarthoff; M. R. Shepherd; J. G. Thayer

doi:10.1103/PhysRevD.67.072001

Measurement of lepton momentum moments in the decay B̄ → Xℓv̄ and determination of the heavy quark expansion parameters and |V_cb|

A. H. Mahmood, S. E. Csorna, I. Danko, G. Bonvicini, D. Cinabro, M. Dubrovin, S. McGee, A. Bornheim, E. Lipeles, S. P. Pappas, A. Shapiro, W. M. Sun, A. J. Weinstein, R. A. Briere, G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, N. E. Adam, J. P. AlexanderK. Berkelman, V. Boisvert, D. G. Cassel, P. S. Drell, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, R. S. Galik, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, A. Magerkurth, H. Mahlke-Krüger, T. O. Meyer, N. B. Mistry, J. R. Patterson, D. Peterson, J. Pivarski, S. J. Richichi, D. Riley, A. J. Sadoff, H. Schwarthoff, M. R. Shepherd, J. G. Thayer

Physics and Astronomy (Twin Cities)

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Abstract

We measure the primary lepton momentum spectrum in B̄→Xℓ v̄ decays, for p_ℓ≥ 1.5 GeV/c in the B rest frame. From this, we calculate various moments of the spectrum. In particular, we find R₀ ≡ ∫_1.7 _GeV(dΓ/dE _sl)dE_ℓ/∫_1.5 _GeV(dΓ/ dE_sl)dE_ℓ=0.6187±0.0014_stat±0. 0016_sys and R₁≡_1.5 _GeVE _ℓ(dΓ/dE_sl)dE_ℓ/∫ _1.5 _GeV(dΓ/dE_sl)dE_ℓ=(1. 7810±0.0007_stat±0.0009_sys) GeV. We use these moments to determine non-perturbative parameters governing the semileptonic width. In particular, we extract the heavy quark expansion parameters Λ̄=(0.39±0.03_stat±0.06 _sys±0.12_th) GeV and λ₁ = (-0.25±0.02_stat±0.05_sys ±0.14 _th) GeV². The theoretical constraints used are evaluated through order 1/M_B ³ in the non-perturbative expansion and β₀α_s ² in the perturbative expansion. We use these parameters to extract |V_cb| from the world average of the semileptonic width and find |V_cb| = (40.8±0.5 _Γsl±0.4 _{(λ1,Λ̄)exp}±0.9_th)× 10 ^-3. In addition, we extract the short range b-quark mass m _b ^1S=(4.82±0.070_exp±0.11 _th) GeV/c². Finally, we discuss the implications of our measurements for the theoretical understanding of inclusive semileptonic processes.

Original language	English (US)
Article number	072001
Journal	Physical Review D
Volume	67
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.67.072001 https://doi.org/10.1103/PhysRevD.67.072001
State	Published - Apr 23 2003

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Mahmood, A. H., Csorna, S. E., Danko, I., Bonvicini, G., Cinabro, D., Dubrovin, M., McGee, S., Bornheim, A., Lipeles, E., Pappas, S. P., Shapiro, A., Sun, W. M., Weinstein, A. J., Briere, R. A., Chen, G. P., Ferguson, T., Tatishvili, G., Vogel, H., Adam, N. E., ... Thayer, J. G. (2003). Measurement of lepton momentum moments in the decay B̄ → Xℓv̄ and determination of the heavy quark expansion parameters and |V_cb|. Physical Review D, 67(7), Article 072001. https://doi.org/10.1103/PhysRevD.67.072001, https://doi.org/10.1103/PhysRevD.67.072001

Mahmood, AH, Csorna, SE, Danko, I, Bonvicini, G, Cinabro, D, Dubrovin, M, McGee, S, Bornheim, A, Lipeles, E, Pappas, SP, Shapiro, A, Sun, WM, Weinstein, AJ, Briere, RA, Chen, GP, Ferguson, T, Tatishvili, G, Vogel, H, Adam, NE, Alexander, JP, Berkelman, K, Boisvert, V, Cassel, DG, Drell, PS, Duboscq, JE, Ecklund, KM, Ehrlich, R, Galik, RS, Gibbons, L, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Hsu, L, Jones, CD, Kandaswamy, J, Kreinick, DL, Magerkurth, A, Mahlke-Krüger, H, Meyer, TO, Mistry, NB, Patterson, JR, Peterson, D, Pivarski, J, Richichi, SJ, Riley, D, Sadoff, AJ, Schwarthoff, H, Shepherd, MR & Thayer, JG 2003, 'Measurement of lepton momentum moments in the decay B̄ → Xℓv̄ and determination of the heavy quark expansion parameters and |V_cb|', Physical Review D, vol. 67, no. 7, 072001. https://doi.org/10.1103/PhysRevD.67.072001, https://doi.org/10.1103/PhysRevD.67.072001

@article{9f053a9c710e4cf498db89b4d747f357,

title = "Measurement of lepton momentum moments in the decay {\=B} → Xℓ{\=v} and determination of the heavy quark expansion parameters and |Vcb|",

abstract = "We measure the primary lepton momentum spectrum in {\=B}→Xℓ {\=v} decays, for pℓ≥ 1.5 GeV/c in the B rest frame. From this, we calculate various moments of the spectrum. In particular, we find R0 ≡ ∫1.7 GeV(dΓ/dE sl)dEℓ/∫1.5 GeV(dΓ/ dEsl)dEℓ=0.6187±0.0014stat±0. 0016sys and R1≡1.5 GeVE ℓ(dΓ/dEsl)dEℓ/∫ 1.5 GeV(dΓ/dEsl)dEℓ=(1. 7810±0.0007stat±0.0009sys) GeV. We use these moments to determine non-perturbative parameters governing the semileptonic width. In particular, we extract the heavy quark expansion parameters {\=Λ}=(0.39±0.03stat±0.06 sys±0.12th) GeV and λ1 = (-0.25±0.02stat±0.05sys ±0.14 th) GeV2. The theoretical constraints used are evaluated through order 1/MB 3 in the non-perturbative expansion and β0αs 2 in the perturbative expansion. We use these parameters to extract |Vcb| from the world average of the semileptonic width and find |Vcb| = (40.8±0.5 Γsl±0.4 (λ1,{\=Λ})exp±0.9th)× 10 -3. In addition, we extract the short range b-quark mass m b 1S=(4.82±0.070exp±0.11 th) GeV/c2. Finally, we discuss the implications of our measurements for the theoretical understanding of inclusive semileptonic processes.",

author = "Mahmood, {A. H.} and Csorna, {S. E.} and I. Danko and G. Bonvicini and D. Cinabro and M. Dubrovin and S. McGee and A. Bornheim and E. Lipeles and Pappas, {S. P.} and A. Shapiro and Sun, {W. M.} and Weinstein, {A. J.} and Briere, {R. A.} and Chen, {G. P.} and T. Ferguson and G. Tatishvili and H. Vogel and Adam, {N. E.} and Alexander, {J. P.} and K. Berkelman and V. Boisvert and Cassel, {D. G.} and Drell, {P. S.} and Duboscq, {J. E.} and Ecklund, {K. M.} and R. Ehrlich and Galik, {R. S.} and L. Gibbons and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and L. Hsu and Jones, {C. D.} and J. Kandaswamy and Kreinick, {D. L.} and A. Magerkurth and H. Mahlke-Kr{\"u}ger and Meyer, {T. O.} and Mistry, {N. B.} and Patterson, {J. R.} and D. Peterson and J. Pivarski and Richichi, {S. J.} and D. Riley and Sadoff, {A. J.} and H. Schwarthoff and Shepherd, {M. R.} and Thayer, {J. G.}",

year = "2003",

month = apr,

day = "23",

doi = "10.1103/PhysRevD.67.072001",

language = "English (US)",

volume = "67",

journal = "Physical Review D",

issn = "0556-2821",

publisher = "American Institute of Physics Publising LLC",

number = "7",

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TY - JOUR

T1 - Measurement of lepton momentum moments in the decay B̄ → Xℓv̄ and determination of the heavy quark expansion parameters and |Vcb|

AU - Mahmood, A. H.

AU - Csorna, S. E.

AU - Danko, I.

AU - Bonvicini, G.

AU - Cinabro, D.

AU - Dubrovin, M.

AU - McGee, S.

AU - Bornheim, A.

AU - Lipeles, E.

AU - Pappas, S. P.

AU - Shapiro, A.

AU - Sun, W. M.

AU - Weinstein, A. J.

AU - Briere, R. A.

AU - Chen, G. P.

AU - Ferguson, T.

AU - Tatishvili, G.

AU - Vogel, H.

AU - Adam, N. E.

AU - Alexander, J. P.

AU - Berkelman, K.

AU - Boisvert, V.

AU - Cassel, D. G.

AU - Drell, P. S.

AU - Duboscq, J. E.

AU - Ecklund, K. M.

AU - Ehrlich, R.

AU - Galik, R. S.

AU - Gibbons, L.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Hsu, L.

AU - Jones, C. D.

AU - Kandaswamy, J.

AU - Kreinick, D. L.

AU - Magerkurth, A.

AU - Mahlke-Krüger, H.

AU - Meyer, T. O.

AU - Mistry, N. B.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Pivarski, J.

AU - Richichi, S. J.

AU - Riley, D.

AU - Sadoff, A. J.

AU - Schwarthoff, H.

AU - Shepherd, M. R.

AU - Thayer, J. G.

PY - 2003/4/23

Y1 - 2003/4/23

N2 - We measure the primary lepton momentum spectrum in B̄→Xℓ v̄ decays, for pℓ≥ 1.5 GeV/c in the B rest frame. From this, we calculate various moments of the spectrum. In particular, we find R0 ≡ ∫1.7 GeV(dΓ/dE sl)dEℓ/∫1.5 GeV(dΓ/ dEsl)dEℓ=0.6187±0.0014stat±0. 0016sys and R1≡1.5 GeVE ℓ(dΓ/dEsl)dEℓ/∫ 1.5 GeV(dΓ/dEsl)dEℓ=(1. 7810±0.0007stat±0.0009sys) GeV. We use these moments to determine non-perturbative parameters governing the semileptonic width. In particular, we extract the heavy quark expansion parameters Λ̄=(0.39±0.03stat±0.06 sys±0.12th) GeV and λ1 = (-0.25±0.02stat±0.05sys ±0.14 th) GeV2. The theoretical constraints used are evaluated through order 1/MB 3 in the non-perturbative expansion and β0αs 2 in the perturbative expansion. We use these parameters to extract |Vcb| from the world average of the semileptonic width and find |Vcb| = (40.8±0.5 Γsl±0.4 (λ1,Λ̄)exp±0.9th)× 10 -3. In addition, we extract the short range b-quark mass m b 1S=(4.82±0.070exp±0.11 th) GeV/c2. Finally, we discuss the implications of our measurements for the theoretical understanding of inclusive semileptonic processes.

AB - We measure the primary lepton momentum spectrum in B̄→Xℓ v̄ decays, for pℓ≥ 1.5 GeV/c in the B rest frame. From this, we calculate various moments of the spectrum. In particular, we find R0 ≡ ∫1.7 GeV(dΓ/dE sl)dEℓ/∫1.5 GeV(dΓ/ dEsl)dEℓ=0.6187±0.0014stat±0. 0016sys and R1≡1.5 GeVE ℓ(dΓ/dEsl)dEℓ/∫ 1.5 GeV(dΓ/dEsl)dEℓ=(1. 7810±0.0007stat±0.0009sys) GeV. We use these moments to determine non-perturbative parameters governing the semileptonic width. In particular, we extract the heavy quark expansion parameters Λ̄=(0.39±0.03stat±0.06 sys±0.12th) GeV and λ1 = (-0.25±0.02stat±0.05sys ±0.14 th) GeV2. The theoretical constraints used are evaluated through order 1/MB 3 in the non-perturbative expansion and β0αs 2 in the perturbative expansion. We use these parameters to extract |Vcb| from the world average of the semileptonic width and find |Vcb| = (40.8±0.5 Γsl±0.4 (λ1,Λ̄)exp±0.9th)× 10 -3. In addition, we extract the short range b-quark mass m b 1S=(4.82±0.070exp±0.11 th) GeV/c2. Finally, we discuss the implications of our measurements for the theoretical understanding of inclusive semileptonic processes.

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DO - 10.1103/PhysRevD.67.072001

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ER -

Measurement of lepton momentum moments in the decay B̄ → Xℓv̄ and determination of the heavy quark expansion parameters and |V_cb|

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