title: New Measurement of the π0 radiative decay width.
abstract: High precision measurements of the differential cross sections for π0 photoproduction at forward angles for two nuclei, 12C and 208Pb, have been performed for incident photon energies of 4.9-5.5 GeV to extract the π0→γγ decay width. The experiment was done at Jefferson Lab using the Hall B photon tagger and a high-resolution multichannel calorimeter. The π0→γγ decay width was extracted by fitting the measured cross sections using recently updated theoretical models for the process. The resulting value for the decay width is Γ(π0→γγ)=7.82±0.14(stat)±0.17(syst)  eV. With the 2.8% total uncertainty, this result is a factor of 2.5 more precise than the current Particle Data Group average of this fundamental quantity, and it is consistent with current theoretical predictions.
authors: Alikhanov Institute for Theoretical and Experimental Physics, Moscow, Russia.
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authors: P
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authors: P
authors: P
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authors: D
authors: Dale
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authors: Danagoulian
authors: G
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authors: A
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authors: Dolgolenko
authors: G
authors: G
authors: Dzyubenko
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authors: Gabrielyan
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authors: M
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authors: X
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authors: P
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authors: Martel
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authors: B
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authors: M
authors: Payen
authors: R
authors: R
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authors: Rodrigues
authors: C
authors: C
authors: Salgado
authors: A
authors: A
authors: Shahinyan
authors: A
authors: A
authors: Sitnikov
authors: D
authors: D
authors: Sober
authors: S
authors: S
authors: Stepanyan
authors: W
authors: W
authors: Stephens
authors: J
authors: J
authors: Underwood
authors: A
authors: A
authors: Vasiliev
authors: V
authors: V
authors: Vishnyakov
authors: M
authors: M
authors: Wood
authors: S
authors: S
authors: Zhou