Absorption cross-sections of 25 GeV/c antideuterons in Li, C, Al, Cu and Pb

Binon, Freddy; Denisov, S.; Donskov, S.V.; Duteil, P.; Giacomelli, G.; Gorin, Yu.P.; Kachanov, Vasilij V.A.; Kutyin, V.M.; Peigneux, Jean Pierre; Petrukhin, A.; Prokoshkin, Yu Y.D.; Razuvaev, E.A.; Shuvalov, Rudolph R.S.; Stoyanova, Dina D.A.; Stroot, Jean-Pierre

doi:10.1016/0370-2693(70)90112-7

Cited by 25 publications

(13 citation statements)

References 2 publications

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“…Anti-particle to particle ratios and hadronic interaction of anti-nuclei For a measurement of particle to anti-particle ratios, the correction of the hadronic interaction of the emitted particles with the detector material has to be precisely known. The relevant cross sections are only poorly measured for anti-nuclei heavier than p. The only available data for anti-deuterons from the U-70 Serpukhov accelerator [38,39] are measured at relatively high momenta (p = 13.3 GeV/c and p = 25.0 GeV/c) and provide only a rough constraint. Two approaches are considered to model the correction for hadronic interaction.…”

Section: Resultsmentioning

confidence: 99%

Production of light nuclei and anti-nuclei inppand Pb-Pb collisions at energies available at the CERN Large Hadron Collider

Adam¹,

Adamová²,

Aggarwal³

et al. 2016

Phys. Rev. C

180

172

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The production of (anti-)deuteron and (anti-) 3 He nuclei in Pb-Pb collisions at √ s NN = 2.76 TeV has been studied using the ALICE detector at the LHC. The spectra exhibit a significant hardening with increasing centrality. Combined blast-wave fits of several particles support the interpretation that this behavior is caused by an increase of radial flow. The integrated particle yields are discussed in the context of coalescence and thermal-statistical model expectations. The particle ratios, 3 He /d and 3 He /p, in Pb-Pb collisions are found to be in agreement with a common chemical freeze-out temperature of T chem ≈ 156 MeV. These ratios do not vary with centrality which is in agreement with the thermal-statistical model. In a coalescence approach, it excludes models in which nucleus production is proportional to the particle multiplicity and favors those in which it is proportional to the particle density instead. In addition, the observation of 31 anti-tritons in Pb-Pb collisions is reported. For comparison, the deuteron spectrum in pp collisions at √ s = 7 TeV is also presented. While the p/π ratio is similar in pp and Pb-Pb collisions, the d/p ratio in pp collisions is found to be lower by a factor of 2.2 than in Pb-Pb collisions.

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Section: Resultsmentioning

confidence: 99%

Production of light nuclei and anti-nuclei inppand Pb-Pb collisions at energies available at the CERN Large Hadron Collider

Adam¹,

Adamová²,

Aggarwal³

et al. 2016

Phys. Rev. C

180

172

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“…Unlike previous estimates, the results presented in the current paper are based entirely on experimental data for σ d inel . In order to model the inelastic processes of antideuterons with matter, the results published in [65,111,112] are used to obtain a momentumdependent correction factor for the σ d inel parameterization implemented in Geant4. Fig.…”

Section: Antideuteron Inelastic Cross Sectionmentioning

confidence: 99%

“…5 shows this correction factor as a function of the antideuteron momentum. The experimental data and their uncertainties from [65,111,112] are described with smooth functions using a combination of exponential and polynomial functions in order to interpolate the results into the momentum ranges with no measurements. The last two data points from [65] at p/nucleon 2 GeV/c have been excluded from the fit to obtain a smooth interpolation between the results from ALICE and from U-70 experiments.…”

Section: Antideuteron Inelastic Cross Sectionmentioning

confidence: 99%

Reevaluation of the cosmic antideuteron flux from cosmic-ray interactions and from exotic sources

Šerkšnytė,

Königstorfer,

von Doetinchem

et al. 2022

Preprint

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Cosmic-ray antideuterons could be a key for the discovery of exotic phenomena in our Galaxy, such as dark-matter annihilations or primordial black hole evaporation. Unfortunately the theoretical predictions of the antideuteron flux at Earth are plagued with uncertainties from the mechanism of antideuteron production and propagation in the Galaxy. We present the most up-to-date calculation of the antideuteron fluxes from cosmic-ray collisions with the interstellar medium and from exotic processes. We include for the first time the antideuteron inelastic interaction cross section recently measured by the ALICE collaboration to account for the loss of antideuterons during propagation. In order to bracket the uncertainty in the expected fluxes, we consider several state-of-the-art models of antideuteron production and of cosmic-ray propagation.

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“…To evaluate the reconstruction efficiency GEANT3 was used to propagate the particles through the detectors. In the GEANT3 version used for this analysis, an empirical parametrization of the antideuteron absorption cross section, based on the measurements carried out at the U-70 Serpukhov accelerator [29,30], is used. Elastic scattering processes are not taken into account by this description.…”

Section: E Feed-down From Hypertritonmentioning

confidence: 99%

Production of (anti-)He3 and (anti-)H3
Acharya¹,
Adamová²,
Adler³
et al. 2020
Phys. Rev. C
26
2
16
0
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The transverse momentum (p T) differential yields of (anti-) 3 He and (anti-) 3 H measured in p-Pb collisions at √ s NN = 5.02 TeV with ALICE at the Large Hadron Collider (LHC) are presented. The ratios of the p Tintegrated yields of (anti-) 3 He and (anti-) 3 H to the proton yields are reported, as well as the p T dependence of the coalescence parameters B 3 for (anti-) 3 He and (anti-) 3 H. For (anti-) 3 He, the results obtained in four classes of the mean charged-particle multiplicity density are also discussed. These results are compared to predictions from a canonical statistical hadronization model and coalescence approaches. An upper limit on the total yield of 4 He is determined.

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Absorption cross-sections of 25 GeV/c antideuterons in Li, C, Al, Cu and Pb

Cited by 25 publications

References 2 publications

Production of light nuclei and anti-nuclei inppand Pb-Pb collisions at energies available at the CERN Large Hadron Collider

Production of light nuclei and anti-nuclei inppand Pb-Pb collisions at energies available at the CERN Large Hadron Collider

Reevaluation of the cosmic antideuteron flux from cosmic-ray interactions and from exotic sources

Production of (anti-)He3 and (anti-)H3
Acharya¹,
Adamová²,
Adler³
et al. 2020
Phys. Rev. C
26
2
16
0
View full text Add to dashboard Cite

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Absorption cross-sections of 25 GeV/c antideuterons in Li, C, Al, Cu and Pb

Cited by 25 publications

References 2 publications

Production of light nuclei and anti-nuclei inppand Pb-Pb collisions at energies available at the CERN Large Hadron Collider

Production of light nuclei and anti-nuclei inppand Pb-Pb collisions at energies available at the CERN Large Hadron Collider

Reevaluation of the cosmic antideuteron flux from cosmic-ray interactions and from exotic sources

Production of (anti-)He3 and (anti-)H3Acharya1, Adamová2, Adler3 et al. 2020Phys. Rev. C262160View full textAdd to dashboardCite

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Production of (anti-)He3 and (anti-)H3
Acharya¹,
Adamová²,
Adler³
et al. 2020
Phys. Rev. C
26
2
16
0
View full text Add to dashboard Cite