Threshold behavior of electron pair production in<i>p</i>-Be collisions

Naudet, C. J.; Bystrický, J.; Carroll, J.; Gordon, J.; Hallman, T. J.; Igo, G.; Kirk, P.; Krebs, G. F.; Lallier, E.; Landaud, G.; Letessier‐Selvon, A.; Madansky, L.; Matis, H. S.; Miller, Donald H.; Roche, G.; Schroeder, L. S.; Seidl, P.A.; Wang, Z. F.; Welsh, Robert C.; Yegneswaran, A.

doi:10.1103/physrevlett.62.2652

Cited by 96 publications

(33 citation statements)

References 21 publications

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“…At higher masses, an enhancement is observed in the region of the p-ro mesons; while a dip-bump structure occurs in the region of 250-300 MeV, near the 2m 1t threshold, possibly rising from the annihilation of pions in the nuclear medium. Additional insight into this structure may be obtained by studying the energy dependence of the integrated cross section for dielectrons with pair masses >200 MeV [3]. As seen in Figure 2b, the integrated DLS data (squares) rise rapidly to join with the two higher energy points.…”

Section: Early Results From the Dls -mentioning

confidence: 92%

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Probing nuclear matter with dielectrons—results from the Bevalac

Schroeder

1992

Nuclear Physics A

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Section: Early Results From the Dls -mentioning

confidence: 92%

“…A systematic study of dieledron (e+e-) production has been carried out by the DLS collaboration [1] at the Bevalac in p-A and A-A collisions [2][3][4][5]. Recently, p-p and p-d measurements have been added to complement these earlier results.…”

Section: Introductionmentioning

confidence: 99%

Probing nuclear matter with dielectrons—results from the Bevalac

Schroeder

1992

Nuclear Physics A

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“…In our previous works [10,11,12] we have calculated the dilepton anisotropy for elementary nucleon-nucleon collisions and for p + d reactions at BEVALAC energies. First results for proton-nucleus and nucleus-nucleus collisions at 1 -2 GeV/A are reported in [13], where the calculated inclusive dilepton spectra were compared to the DLS data [1,2,3].…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, dileptons are used as electromagnetic signals from the hot and dense nuclear phase in heavy-ion collisions at BEVALAC/SIS [1,2,3] or SPS energies [4,5,6]. The information carried out by leptons may tell us not only about the interaction dynamics of colliding nuclei, but also on properties of hadrons in the nuclear environment or on a possible phase transition of hadrons into a quark-gluon plasma (cf.…”

Section: Introductionmentioning

confidence: 99%

Probing hadronic polarizations with dilepton anisotropies

Bratkovskaya

Cassing

Mosel

1997

Zeitschrift f�r Physik C Particles and Fields

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We investigate the production of e + e − pairs from p + Be and nucleus-nucleus collisions from 2 GeV/A to 200 GeV/A within a covariant transport approach and focus on the dilepton angular anisotropies as a function of the dilepton invariant mass. Whereas the low mass regime yields information about the Dalitz decays of the ∆, η and ω, above M ≈0.5 GeV the angular anisotropies provide additional information about the π + π − → ρ 0 → e + e − channel in the medium. The anisotropy coefficient is found to change its sign for M > 0.5 GeV in case of nucleus-nucleus reactions when increasing the bombarding energy from 2 GeV/A to 200 GeV/A which sheds some light on the ππ → ρ dynamics.

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“…During the last several years, the Dilepton Spectrometer (DLS) collaboration 1,2,3,4,5 has studied the production of dileptons in both p-A collisions and A-A collisions. These publications demonstrated that there was a measurable dilepton cross section at Bevalac energies in the range of 1-2 A⋅GeV.…”

Section: Introduction To Dilepton Productionmentioning

confidence: 99%

Dilepton production from p-p to CaCa at the Bevalac

et al. 1995

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The DLS collaboration has recently completed a high statistics study of dilepton production at the Bevalac. In particular, we have measured dielectrons (e + e -) from p-p and p-d collisions to understand the basic dilepton production mechanisms in the energy range from 1.05 -4.9 GeV. These data can be used to determine the basic processes which contribute to nucleon-nucleon dilepton production such as hadronic bremsstrahlung, vector meson processes, and hadronic Dalitz decay. The data show that a simple elastic bremsstrahlung calculation is insufficient to explain the data. Theoretical models are compared with the data. A new high statistics study of Ca-Ca at 1.05 A⋅GeV has been made to study the collectivity of A-A collisions.

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Threshold behavior of electron pair production inp-Be collisions

Cited by 96 publications

References 21 publications

Probing nuclear matter with dielectrons—results from the Bevalac

Probing nuclear matter with dielectrons—results from the Bevalac

Probing hadronic polarizations with dilepton anisotropies

Dilepton production from p-p to CaCa at the Bevalac

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