Photoproduction of Neutral Rho Mesons from Complex Nuclei

Alvensleben, H.; Becker, U.; Bertram, William K.; Chen, M.; Cohen, Kenneth J.; Knasel, T.M.; Marshall, R.; Quinn, D. J.; Rohde, M.; Sanders, G. H.; Schubel, H.; Ting, Samuel C.C.

doi:10.1103/physrevlett.24.786

Cited by 70 publications

(9 citation statements)

References 22 publications

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“…An alternative method to study the ω self energy in nuclei is an attenuation measurement of the ω flux in ω photoproduction off nuclei. Already in early experiments on the ρ meson properties in nuclei [17] this method has been used to yield the first extraction of the ρN cross section from photoproduction experiments on nuclei. More recently, the authors of [18] haven taken this up for the case of φ photoproduction.…”

Section: Introductionmentioning

confidence: 99%

ω attenuation in nuclei

Mühlich¹,

Mosel²

2006

Nuclear Physics A

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Section: Introductionmentioning

confidence: 99%

ω attenuation in nuclei

Mühlich¹,

Mosel²

2006

Nuclear Physics A

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“…[6] have pointed out that there is a possibility to study at least the imaginary part of the φ self energy in nuclei by an attenuation measurement of the φ flux in nuclear φ photoproduction. This is a method that has been used already in early experiments on the ρ meson properties in nuclei [11] and has led there to the first extraction of the ρN cross section from photoproduction experiments. For the φ meson this suggestion has been taken up by a nuclear φ photoproduction experiment at SPring8/Osaka that is optimized to measure φ mesons under forward angles by detecting the K + K − decay channel [12].…”

mentioning

confidence: 99%

“…In the very same spirit as in [11] for the case of ρ photoproduction in nuclei the authors of [12] used a simple Glauber formula in order to extract the total φN cross section from the measured nuclear φ photoproduction cross sections. To this end nuclear effects as Fermi motion, Pauli blocking, quasi elastic scattering, etc.…”

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confidence: 99%

Attenuation of ϕ mesons in γA reactions

Mühlich

Mosel

2006

Nuclear Physics A

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We present a theoretical analysis of inclusive photoproduction of φ mesons in nuclei. In particular the dependence of the total φ meson yield on the target mass number is investigated. The calculations are done using the semi-classical BUU transport approach that combines the initial state interaction of the incoming photon with the coupled-channel dynamics of the final state particles. The conditions of the calculations are chosen such as to match the set-up of a recent experiment performed at SPring8/Osaka. Whereas the observables prove to be rather sensitive to the φ self energy in the medium, the attribution of deviations from the standard scenario to a particular in-medium effect seems to be impossible.  2005 Elsevier B.V. All rights reserved. PACS: 25.20.Lj; 13.25.-k; 14.40.Cs Keywords: Photonuclear reactions; φ decay in nuclei; Medium properties of mesonsThe question of how the properties of the light vector mesons change once they are put into a strongly interacting environment provides a field of very active research. In particular the theoretical and experimental determination of the vector and isoscalar spectral densities in systems with either finite temperature or baryon density has attracted much attention [1]. In particular the φ meson provides a well suited probe as it is a very sharp resonance in vacuum. One could thus expect to observe even smallest deviations of its spectral distribution in the nuclear medium from its properties in vacuum. Numerous authors have studied the medium modifications of the φ properties in different approaches as effective Lagrangians and QCD sum rules [2-6]. As a general picture from these studies emerges a quite small shift of the φ meson pole mass, but a sizeable renormalization of its width as temperature and/or density increase. Particular numbers

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“…In column 5 we show this last model with regenerative contributions omitted. In this case this model is easily shown to reduce to the Glauber theory with an "optical" approximation -i.e., the approximation in which one ignores the q2 dependence of the nucleon-nucleon elastic scattering amplitude when compared to that of the nuclear form factor Nuclear radii deduced from p photoproduction [22] have been used in this last model. The electromagnetic radii would yield cross sections Table 2 A comparison of our measured total cross sections at 26.5 GeV/c (column 1) with those calculated from several theories (columns 2-5).…”

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confidence: 99%

Neutron total cross sections on protons and nuclei in the 10 to 30 GeV/c momentum range

et al. 1971

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We present the results of a recent AGS measurement of the total cross section for neutrons on protons, deuterons and other nuclei in the momentum range 10 to 30 GeV/c. The standard good-geometry transmission technique was used with a total absorption spectrometer to detect the transmitted neutrons. Biasing the spectrometer towards high neutron momenta together with the strongly-peaked momentum spectrum of the beam gave relatively good momentum resolution. Measurements were made at mean momenta of 12, 13, 18 and 26.5 GeV/c. Results are presented and the cross sections for nuclei are compared with theoretical predictions.

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Photoproduction of Neutral Rho Mesons from Complex Nuclei

Cited by 70 publications

References 22 publications

ω attenuation in nuclei

ω attenuation in nuclei

Attenuation of ϕ mesons in γA reactions

Neutron total cross sections on protons and nuclei in the 10 to 30 GeV/c momentum range

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