Branching fraction and photon energy spectrum for b→sγ

CLEO Collaboration

doi:10.1103/PhysRevLett.87.251807

Branching fraction and photon energy spectrum for b→sγ

CLEO Collaboration

Physics

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University of Texas at Austin
University of Texas-Pan American
Vanderbilt University
Virginia Polytechnic Institute and State University
Wayne State University
California Institute of Technology
University of California at San Diego

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Abstract

We have measured the branching fraction and photon energy spectrum for the radiative penguin process b→sγ. We find B(b→sγ)=(3.21 ±0.43±0.27_−0.10^+0.18)×10⁻⁴, where the errors are statistical, systematic, and from theory corrections. We obtain first and second moments of the photon energy spectrum above 2.0 GeV,(E_γ)=2.346±0.032±0.011GeV, and (E_γ²)−(E_γ)²=0.0226±0.0066±0.0020 GeV², where the errors are statistical and systematic. From the first moment, we obtain (in the modified minimal subtraction renormalization scheme, to order 1/M_B³ and β₀α_s²) the heavy quark effective theory parameter Λ^¯0.35 ±0.08±0.10 GeV.

Original language	English
Journal	Physical Review Letters
Volume	87
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.87.251807
State	Published - Dec 3 2001

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10.1103/PhysRevLett.87.251807

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@article{a4989d01d59240eda387ff3b6023b49b,

title = "Branching fraction and photon energy spectrum for b→sγ",

abstract = "We have measured the branching fraction and photon energy spectrum for the radiative penguin process b→sγ. We find B(b→sγ)=(3.21 ±0.43±0.27−0.10+0.18)×10−4, where the errors are statistical, systematic, and from theory corrections. We obtain first and second moments of the photon energy spectrum above 2.0 GeV,(Eγ)=2.346±0.032±0.011GeV, and (Eγ2)−(Eγ)2=0.0226±0.0066±0.0020 GeV2, where the errors are statistical and systematic. From the first moment, we obtain (in the modified minimal subtraction renormalization scheme, to order 1/MB3 and β0αs2) the heavy quark effective theory parameter Λ¯0.35 ±0.08±0.10 GeV.",

author = "\{CLEO Collaboration\} and S. Chen and Hinson, \{J. W.\} and J. Lee and Miller, \{D. H.\} and V. Pavlunin and Shibata, \{E. I.\} and Shipsey, \{I. P.J.\} and D. Cronin-Hennessy and Lyon, \{A. L.\} and Thorndike, \{E. H.\} and Coan, \{T. E.\} and V. Fadeyev and Gao, \{Y. S.\} and Y. Maravin and I. Narsky and R. Stroynowski and J. Ye and T. Wlodek and M. Artuso and K. Benslama and C. Boulahouache and K. Bukin and E. Dambasuren and G. Majumder and R. Mountain and T. Skwarnicki and S. Stone and Wang, \{J. C.\} and A. Wolf and S. Kopp and M. Kostin and Mahmood, \{A. H.\} and Csorna, \{S. E.\} and I. Danko and McLean, \{K. W.\} and Z. Xu and R. Godang and G. Bonvicini and D. Cinabro and M. Dubrovin and S. McGee and Zhou, \{G. J.\} and A. Bornheim and E. Lipeles and Pappas, \{S. P.\} and A. Shapiro and Sun, \{W. M.\} and Weinstein, \{A. J.\} and Jaffe, \{D. E.\} and J. Ernst",

year = "2001",

month = dec,

day = "3",

doi = "10.1103/PhysRevLett.87.251807",

language = "English",

volume = "87",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "25",

}

TY - JOUR

T1 - Branching fraction and photon energy spectrum for b→sγ

AU - CLEO Collaboration

AU - Chen, S.

AU - Hinson, J. W.

AU - Lee, J.

AU - Miller, D. H.

AU - Pavlunin, V.

AU - Shibata, E. I.

AU - Shipsey, I. P.J.

AU - Cronin-Hennessy, D.

AU - Lyon, A. L.

AU - Thorndike, E. H.

AU - Coan, T. E.

AU - Fadeyev, V.

AU - Gao, Y. S.

AU - Maravin, Y.

AU - Narsky, I.

AU - Stroynowski, R.

AU - Ye, J.

AU - Wlodek, T.

AU - Artuso, M.

AU - Benslama, K.

AU - Boulahouache, C.

AU - Bukin, K.

AU - Dambasuren, E.

AU - Majumder, G.

AU - Mountain, R.

AU - Skwarnicki, T.

AU - Stone, S.

AU - Wang, J. C.

AU - Wolf, A.

AU - Kopp, S.

AU - Kostin, M.

AU - Mahmood, A. H.

AU - Csorna, S. E.

AU - Danko, I.

AU - McLean, K. W.

AU - Xu, Z.

AU - Godang, R.

AU - Bonvicini, G.

AU - Cinabro, D.

AU - Dubrovin, M.

AU - McGee, S.

AU - Zhou, G. J.

AU - Bornheim, A.

AU - Lipeles, E.

AU - Pappas, S. P.

AU - Shapiro, A.

AU - Sun, W. M.

AU - Weinstein, A. J.

AU - Jaffe, D. E.

AU - Ernst, J.

PY - 2001/12/3

Y1 - 2001/12/3

N2 - We have measured the branching fraction and photon energy spectrum for the radiative penguin process b→sγ. We find B(b→sγ)=(3.21 ±0.43±0.27−0.10+0.18)×10−4, where the errors are statistical, systematic, and from theory corrections. We obtain first and second moments of the photon energy spectrum above 2.0 GeV,(Eγ)=2.346±0.032±0.011GeV, and (Eγ2)−(Eγ)2=0.0226±0.0066±0.0020 GeV2, where the errors are statistical and systematic. From the first moment, we obtain (in the modified minimal subtraction renormalization scheme, to order 1/MB3 and β0αs2) the heavy quark effective theory parameter Λ¯0.35 ±0.08±0.10 GeV.

AB - We have measured the branching fraction and photon energy spectrum for the radiative penguin process b→sγ. We find B(b→sγ)=(3.21 ±0.43±0.27−0.10+0.18)×10−4, where the errors are statistical, systematic, and from theory corrections. We obtain first and second moments of the photon energy spectrum above 2.0 GeV,(Eγ)=2.346±0.032±0.011GeV, and (Eγ2)−(Eγ)2=0.0226±0.0066±0.0020 GeV2, where the errors are statistical and systematic. From the first moment, we obtain (in the modified minimal subtraction renormalization scheme, to order 1/MB3 and β0αs2) the heavy quark effective theory parameter Λ¯0.35 ±0.08±0.10 GeV.

UR - https://www.scopus.com/pages/publications/45849154779

U2 - 10.1103/PhysRevLett.87.251807

DO - 10.1103/PhysRevLett.87.251807

M3 - Article

SN - 0031-9007

VL - 87

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

ER -

Branching fraction and photon energy spectrum for b→sγ

Abstract

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