Analysis of the dilepton invariant mass spectrum in C + C collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>2</mml:mn><mml:mi>A</mml:mi></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mi>A</mml:mi></mml:mrow></mml:math>GeV

Thomere, M.; Hartnack, C.; Wolf, Gy.; Aichelin, J.

doi:10.1103/physrevc.75.064902

Cited by 24 publications

(31 citation statements)

References 51 publications

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“…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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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: 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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“…Such approaches rely on a realistic treatment of elementary nucleon-nucleon and mesonnucleon interactions, as described in the previous paragraphs, to calculate double-differential cross-sections of the produced particles [33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

Agakishiev¹,

Álvarez‐Pol²,

Bałanda³

et al. 2012

Eur. Phys. J. A

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Abstract. We present measurements of exclusive π +,0 and η production in pp reactions at 1.25 GeV and 2.2 GeV beam kinetic energy in hadron and dielectron channels. In the case of π + and π 0 , high-statistics invariant-mass and angular distributions are obtained within the HADES acceptance as well as acceptancecorrected distributions, which are compared to a resonance model. The sensitivity of the data to the yield Page 2 of 17 Eur. Phys. J. A (2012) 48: 74 and production angular distribution of Δ(1232) and higher-lying baryon resonances is shown, and an improved parameterization is proposed. The extracted cross-sections are of special interest in the case of pp → ppη, since controversial data exist at 2.0 GeV; we find σ = 0.142 ± 0.022 mb. Using the dielectron channels, the π 0 and η Dalitz decay signals are reconstructed with yields fully consistent with the hadronic channels. The electron invariant masses and acceptance-corrected helicity angle distributions are found in good agreement with model predictions.

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“…The plain bremsstrahlung contribution is expected to be small at the present beam energy [27]. Similar cocktails have also been considered in previous attempts to describe the dielectron production in pp, pd and pA collisions [23,25,[28][29][30][31][32][33][34]. Schematically, the differential distribution of dielectrons with invariant mass M ee can be expressed as a superposition of the above-mentioned decay channels…”

Section: The Datamentioning

confidence: 94%

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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Analysis of the dilepton invariant mass spectrum in C + C collisions at2Aand1AGeV

Cited by 24 publications

References 51 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

Study of exclusive one-pion and one-eta production using hadron and dielectron channels in pp reactions at kinetic beam energies of 1.25 GeV and 2.2 GeV with HADES

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

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