The cosmic ray antiproton background for AMS-02

Kappl, Reinhard; Winkler, Martin Wolfgang

doi:10.1088/1475-7516/2014/09/051

Cited by 82 publications

(164 citation statements)

References 62 publications

Supporting

Mentioning

159

Contrasting

Order By: Relevance

“…Proton proton scattering constitutes the dominant process and shall be the main focus of this work. We follow our previous study [7] and separate the total antiproton production cross section σ into several pieces σ = σp + σn , σp ,n = σ 0 p,n + σ Λ p,n .…”

Section: Antiproton Production Channelsmentioning

confidence: 99%

“…In [7] symmetry and isospin arguments were used to estimate that f The next section is devoted to the determination of ∆ Λ while we will discuss f 0 p in sections 5 and 6, before turning to ∆ IS in section 8.…”

Section: Antiproton Production Channelsmentioning

confidence: 99%

“…As experimental data indicate that the phase space distributions of the resulting antiprotons matches between the two production modes [7,10], we take ∆ Λ to be only a function of the center-of-mass energy √ s. We can extract it from the parent hyperon production…”

Section: Hyperonsmentioning

confidence: 99%

“…Due to lack of experimental data onΣ production, we follow [7] and use symmetry arguments to estimateΣ/Λ = 0.33. We assume a 25% uncertainty on this ratio.…”

Section: Hyperonsmentioning

confidence: 99%

“…In a previous study we determined the cross sections within the regime of radial/ Feynman scaling [7]. In this work, we identify sources of scaling violation which become relevant at high energies.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Cosmic ray antiprotons at high energies

Winkler

2017

J. Cosmol. Astropart. Phys.

Self Cite

157

View full text Add to dashboard Cite

Cosmic ray antiprotons provide a powerful tool to probe dark matter annihilations in our galaxy. The sensitivity of this important channel is, however, diluted by sizable uncertainties in the secondary antiproton background. In this work, we improve the calculation of secondary antiproton production with a particular focus on the high energy regime. We employ the most recent collider data and identify a substantial increase of antiproton cross sections with energy. This increase is driven by the violation of Feynman scaling as well as by an enhanced strange hyperon production. The updated antiproton production cross sections are made publicly available for independent use in cosmic ray studies. In addition, we provide the correlation matrix of cross section uncertainties for the AMS-02 experiment. At high energies, the new cross sections improve the compatibility of the AMS-02 data with a pure secondary origin of antiprotons in cosmic rays.

show abstract

Section: Antiproton Production Channelsmentioning

confidence: 99%

Section: Antiproton Production Channelsmentioning

confidence: 99%

Section: Hyperonsmentioning

confidence: 99%

“…Due to lack of experimental data onΣ production, we follow [7] and use symmetry arguments to estimateΣ/Λ = 0.33. We assume a 25% uncertainty on this ratio.…”

Section: Hyperonsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cosmic ray antiprotons at high energies

Winkler

2017

J. Cosmol. Astropart. Phys.

Self Cite

157

View full text Add to dashboard Cite

show abstract

The Strong Force meets the Dark Sector: a robust estimate of QCD uncertainties for anti-matter dark matter searches

Jueid,

Kip,

Ruiz de Austri

et al. 2024

J. High Energ. Phys.

View full text Add to dashboard Cite

In dark-matter annihilation channels to hadronic final states, stable particles — such as positrons, photons, antiprotons, and antineutrinos — are produced via complex sequences of phenomena including QED/QCD radiation, hadronisation, and hadron decays. These processes are normally modelled by Monte Carlo (MC) event generators whose limited accuracy imply intrinsic QCD uncertainties on the predictions for indirect-detection experiments like Fermi-LAT, Pamela, IceCube or Ams–02. In this article, we perform a comprehensive analysis of QCD uncertainties, meaning both perturbative and nonperturbative sources of uncertainty are included — estimated via variations of MC renormalization-scale and fragmentation-function parameters, respectively — in antimatter spectra from dark-matter annihilation, based on parametric variations of the Pythia 8 event generator. After performing several retunings of light-quark fragmentation functions, we define a set of variations that span a conservative estimate of the QCD uncertainties. We estimate the effects on antimatter spectra for various annihilation channels and final-state particle species, and discuss their impact on fitted values for the dark-matter mass and thermally-averaged annihilation cross section. We find dramatic impacts which can go up to $$ \mathcal{O} $$ O (40) GeV for uncertainties on the dark-matter mass and up to $$ \mathcal{O} $$ O (10%) for the annihilation cross section. We provide the spectra in tabulated form including QCD uncertainties and code snippets to perform fast dark-matter fits, in this github repository.

show abstract

Constraining the Higgs portal with antiprotons

Urbano

Xue

2015

J. High Energ. Phys.

View full text Add to dashboard Cite

The scalar Higgs portal is a compelling model of dark matter (DM) in which a renormalizable coupling with the Higgs boson provides the connection between the visible world and the dark sector. In this paper we investigate the constraint placed on the parameter space of this model by the antiproton data. Due to the fact that the antiprotonto-proton ratio has relative less systematic uncertainties than the antiproton absolute flux, we propose and explore the possibility to combine all the availablep/p data. Following this approach, we are able to obtain stronger limits if compared with the existing literature. In particular, we show that most of the parameter space close to the Higgs resonance is ruled out by our analysis. Furthermore, by studying the reach of the future AMS-02 antiproton and antideuteron data, we argue that a DM mass of O(150) GeV offers a promising discovery potential. The method of combining all the antiproton-to-proton ratio data proposed in this paper is quite general, and can be straightforwardly applied to other models.

show abstract

The cosmic ray antiproton background for AMS-02

Cited by 82 publications

References 62 publications

Cosmic ray antiprotons at high energies

Cosmic ray antiprotons at high energies

The Strong Force meets the Dark Sector: a robust estimate of QCD uncertainties for anti-matter dark matter searches

Constraining the Higgs portal with antiprotons

Contact Info

Product

Resources

About