Subthreshold φ meson production in heavy-ion collisions

Barz, H.W.; Zétényi, M.; Wolf, Gy.; Kämpfer, B.

doi:10.1016/s0375-9474(02)00593-6

Cited by 43 publications

(60 citation statements)

References 32 publications

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“…is already considered, which means that the Δ mass shape has to be sampled in the first step with the pure function g Δ (m) without using condition (6). This is ensured by the Pluto framework automatically.…”

Section: Models Returning Dγ/dmmentioning

confidence: 99%

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A versatile method for simulating pp $ \rightarrow$ ppe+e- and dp $ \rightarrow$ pne+e-pspec reactions

et al. 2010

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Abstract.We have developed a versatile software package for the simulation of di-electron production in pp and dp collisions at moderate beam kinetic energies (1-2 GeV). Particular attention has been paid to incorporate different descriptions of the Dalitz decay Δ → Ne + e − via a common interface. In addition, suitable parameterizations for the virtual bremsstrahlung process NN → NNe + e − based on one-boson exchange models have been implemented. Such simulation tools with high flexibility of the framework are important for the interpretation of the di-electron data taken with the HADES spectrometer and demonstrates the wide applicability within the field of nuclear and hadronic physics.

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Section: Models Returning Dγ/dmmentioning

confidence: 99%

“…There exist a multitude of predictions, partially conflicting in details, awaiting verification or falsification [2][3][4][5][6][7]. Due to negligible final-state interactions with nuclear matter, di-electrons or di-muons are considered to be useful penetrating probes for this purpose.…”

Section: Introductionmentioning

confidence: 99%

A versatile method for simulating pp $ \rightarrow$ ppe+e- and dp $ \rightarrow$ pne+e-pspec reactions

et al. 2010

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“…Furthermore, q and q pole denote the pion 3-momenta in the rest frame of the Δ(1232) with mass M and M pole , respectively. In [16] the authors investigate the effect of different cutoff prescriptions [44,45], in particular on the dielectron spectra for high masses. The resulting uncertainties are larger than a factor of 3.…”

Section: The Datamentioning

confidence: 99%

“…Various prescriptions are used in model calculations (for details, see sect. 3 and [16]) which differ at high resonance masses. As a consequence, the resulting dielectron yield from the resonance Dalitz decays has a large uncertainty, as shown for Δ(1232) in [16].…”

Section: Introductionmentioning

confidence: 99%

Inclusive dielectron spectra in p+p collisions at 3.5 GeV kinetic beam energy

Agakishiev¹,

Bałanda²,

Belver³

et al. 2012

Eur. Phys. J. A

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Abstract. We present the inclusive invariant mass, transverse momentum and rapidity distributions of dielectrons (e + e − pairs) in p+p interactions at 3.5 GeV beam kinetic energy. In the vector meson mass region, a distinct peak corresponding to direct ω decays is reconstructed with a 2% mass resolution. The data is compared to predictions from three model calculations. Due to the large acceptance of the HADES apparatus for e + e − invariant masses above 0.2 GeV/c 2 and for transverse pair momenta pt < 1 GeV/c, acceptance corrections are, to a large extent, model independent. This allows us to extract from dielectron data for the first time at this energy the inclusive production cross-sections for light vector mesons. Inclusive production cross-sections for π 0 and η mesons are also reported. The obtained results will serve as an important reference for the study of vector meson production in proton-nucleus and heavy-ion collisions. Furthermore, using this data, an improved value for the upper bound of the branching ratio for direct η decays into the electron-positron channel is obtained.Eur. Phys. J. A (2012) 48: 64

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“…N N →N N η describes the process of production of an off-shell η meson in a NN collision, while the amplitude T (2) η→γe + e − describes the Dalitz decay of the produced η meson into a real photon and a di-electron. In the propagator of the η meson the mass m η has been replaced by m η − iΓ η,tot /2 to take into account the finite life time of the η meson.…”

Section: E Cross Section For Pp → Ppηmentioning

confidence: 99%

Di-electrons from η -meson Dalitz decay in proton-proton collisions

Kaptari

Kämpfer

2007

Eur. Phys. J. A

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The reaction pp → ppη → ppγe + e − is discussed within a covariant effective meson-nucleon theory. The model is adjusted to data of the subreaction pp → ppη. Our focus is on di-electrons from Dalitz decays of η mesons, η → γγ * → γe + e − , and the role of the corresponding transition form factor F ηγγ * . Numerical results are presented for the intermediate energy kinematics of HADES experiments.

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Subthreshold φ meson production in heavy-ion collisions

Cited by 43 publications

References 32 publications

A versatile method for simulating pp $ \rightarrow$ ppe+e- and dp $ \rightarrow$ pne+e-pspec reactions

A versatile method for simulating pp $ \rightarrow$ ppe+e- and dp $ \rightarrow$ pne+e-pspec reactions

Inclusive dielectron spectra in p+p collisions at 3.5 GeV kinetic beam energy

Di-electrons from η -meson Dalitz decay in proton-proton collisions

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