Radiative Width of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi></mml:math>Meson

Browman, A.; Dewire, J. W.; Gittleman, B.; Hanson, K.; Loh, E. C.; Lewis, R.

doi:10.1103/physrevlett.32.1067

Cited by 123 publications

(68 citation statements)

References 9 publications

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“…For the case of Cornell experiment [23], on the other hand, the cross sections of η photoproduction from complex nuclei were not published and the only information available are the meson yields, which are the number of two γ events within the invariant mass of the η meson at a given angular bin. Therefore, in order to compare theory and experiment, a separate Monte Carlo algorithm was developed to account for the η → γ γ decay.…”

Section: Extracting the η → γ γ Decay Width Via The Primakoff Methodmentioning

confidence: 99%

“…Such amplitude is not known precisely at our energies of interest and we adopted the same parametrization of Ref. [23] for the case of η photoproduction (L = 4k). The NI cross section is obtained from the cascade calculations such that:…”

Section: Extracting the η → γ γ Decay Width Via The Primakoff Methodmentioning

confidence: 99%

“…At extreme forward angles, the total cross section for pseudoscalar meson photoproduction from complex nuclei is assumed to be in the form [2,3,23,57,58]:…”

Section: Extracting the η → γ γ Decay Width Via The Primakoff Methodmentioning

confidence: 99%

“…The η → γ γ decay width has been measured in collider experiments [17][18][19][20][21][22] and also using the Primakoff method at Cornell [23]. There is also another Primakoff-type experiment [24], but the uncertainty from the separation of the Coulomb and nuclear contributions was probably underestimated.…”

Section: Introductionmentioning

confidence: 99%

“…The calculations for incoherent π 0 photoproduction are successfully applied for the interpretation of the magnitude and energy dependence of the measured ratio σ γ A /σ γ N taken for several nuclei (Be, C, Al, Cu, Ag, and Pb) at Cornell [29]. In this section we also present a detailed explanation for the incoherent background of η mesons in another Cornell experiment [23], extracting the η → γ γ decay width via the Primakoff method. The conclusions and final remarks are presented in Sec.…”

Section: Introductionmentioning

confidence: 99%

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Nuclear incoherent photoproduction ofπ0andηfrom 4 to 12 GeV

Rodrigues¹,

Arruda‐Neto²,

Mesa³

et al. 2010

Phys. Rev. C

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The mechanism of incoherent π 0 and η photoproduction from complex nuclei is investigated from 4 to 12 GeV with an extended version of the multicollisional Monte Carlo (MCMC) intranuclear cascade model. The calculations take into account the elementary photoproduction amplitudes via a Regge model and the nuclear effects of photon shadowing, Pauli blocking, and meson-nucleus final-state interactions. The results for π 0 photoproduction reproduced for the first time the magnitude and energy dependence of the measured rations σ γ A /σ γ N for several nuclei (Be, C, Al, Cu, Ag, and Pb) from a Cornell experiment. The results for η photoproduction fitted the inelastic background in Cornell's yields remarkably well, which is clearly not isotropic as previously considered in Cornell's analysis. With this constraint for the background, the η → γ γ decay width was extracted using the Primakoff method, combining Be and Cu data [ η→γ γ = 0.476 (62)

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Section: Extracting the η → γ γ Decay Width Via The Primakoff Methodmentioning

confidence: 99%

Section: Extracting the η → γ γ Decay Width Via The Primakoff Methodmentioning

confidence: 99%

“…At extreme forward angles, the total cross section for pseudoscalar meson photoproduction from complex nuclei is assumed to be in the form [2,3,23,57,58]:…”

Section: Extracting the η → γ γ Decay Width Via The Primakoff Methodmentioning

confidence: 99%