Isotopic cross sections of 12C fragmentation on hydrogen measured at 1.87 and 2.69 GeV/nucleon

Korejwo, A.; Giller, M.; Dzikowski, T.; Perelygin, V.; Zarubin, A.

doi:10.1088/0954-3899/28/6/304

Cited by 16 publications

(12 citation statements)

References 17 publications

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“…These values are based on data summarised in Ref. [86][87][88][89][90][91][92]. We extend the result to account for He in the ISM, assuming number density n ISM = 0.9n H + 0.1n He and using the formula in Ref.…”

Section: Calibrating Coalescence With Hbt Correlationsmentioning

confidence: 97%

Cosmic rays, antihelium, and an old navy spotlight

et al. 2017

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Cosmic-ray anti-deuterium and anti-helium have long been suggested as probes of dark matter, as their secondary astrophysical production was thought extremely scarce. But how does one actually predict the secondary flux? Anti-nuclei are dominantly produced in pp collisions, where laboratory cross section data is lacking. We make a new attempt at tackling this problem by appealing to a scaling law of nuclear coalescence with the physical volume of the hadronic emission region. The same volume is probed by Hanbury Brown-Twiss (HBT) two-particle correlations. We demonstrate the consistency of the scaling law with systems ranging from central and off-axis AA collisions to pA collisions, spanning 3 orders of magnitude in coalescence yield. Extending the volume scaling to the pp system, HBT data allows us to make a new estimate of coalescence, that we test against preliminary ALICE pp data. For anti-helium the resulting cross section is 1-2 orders of magnitude higher than most earlier estimates. The astrophysical secondary flux of anti-helium could be within reach of a five-year exposure of AMS02.challenge, instead, is in computing the production cross sections. Invoking the HBT-coalescence relation, we derive new estimates for thed and 3 He yield in pp collisions, forming the basis of our results in Fig.

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Section: Calibrating Coalescence With Hbt Correlationsmentioning

confidence: 97%

Cosmic rays, antihelium, and an old navy spotlight

et al. 2017

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“…In [52] it is argued that this decrease is backed up by the data of Korejwo et al [67,68] Besides the spallation of nuclei on hydrogen, also the spallation on helium contributes significantly to the boron flux. In [86] it was suggested to account for scattering on helium by multiplying the protonic fragmentation cross sections by an energy-dependent enhancement factor of the form…”

Section: Boron Production Cross Sectionmentioning

confidence: 99%

A precision search for WIMPs with charged cosmic rays

Reinert¹,

Winkler²

2018

J. Cosmol. Astropart. Phys.

160

214

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AMS-02 has reached the sensitivity to probe canonical thermal WIMPs by their annihilation into antiprotons. Due to the high precision of the data, uncertainties in the astrophysical background have become the most limiting factor for indirect dark matter detection. In this work we systematically quantify and -where possible -reduce uncertainties in the antiproton background. We constrain the propagation of charged cosmic rays through the combination of antiproton, B/C and positron data. Cross section uncertainties are determined from a wide collection of accelerator data and are -for the first time ever -fully taken into account. This allows us to robustly constrain even subdominant dark matter signals through their spectral properties. For a standard NFW dark matter profile we are able to exclude thermal WIMPs with masses up to 570 GeV which annihilate into bottom quarks. While we confirm a reported excess compatible with dark matter of mass around 80 GeV, its local (global) significance only reaches 2.2 σ (1.1 σ) in our analysis.

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“…Tuning propagated CR abundances to the data in this energy range could lead to significant errors at higher energies if incorrect cross sections are used. [167] Compilations and data bases [RV84] [168] Certain cross sections in this compilation do not have associated error bars. In these cases it is assumed that the relative error is 10% for those cross sections whose value >10 mb, 20% for cross sections <10 mb, and 30% for cross sections <1 mb.…”

Section: Ranked Channels At 10 Gev/nmentioning

confidence: 99%

Current status and desired precision of the isotopic production cross sections relevant to astrophysics of cosmic rays: Li, Be, B, C, and N

et al. 2018

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The accuracy of the current generation of cosmic-ray (CR) experiments, such as AMS-02, PAMELA, CALET, and ISS-CREAM, is now reaching ∼1-3% in a wide range in energy per nucleon from GeV/n to multi-TeV/n. Their correct interpretation could potentially lead to discoveries of new physics and subtle effects that were unthinkable just a decade ago. However, a major obstacle in doing so is the current uncertainty in the isotopic production cross sections that can be as high as 20-50% or even larger in some cases. While there is a recently reached consensus in the astrophysics community that new measurements of cross sections are desirable, no attempt to evaluate the importance of particular reaction channels and their required accuracy has been made yet. It is, however, clear that it is a huge work that requires an incremental approach. The goal of this study is to provide the ranking of the isotopic cross sections contributing to the production of the most astrophysically important CR Li, Be, B, C, and N species. In this paper, we (i) rank the reaction channels by their importance for a production of a particular isotope, (ii) provide comparisons plots between the models and data used, and (iii) evaluate a generic beam time necessary to reach a 3% precision in the production cross-sections pertinent to the AMS-02 experiment. This first roadmap may become a starting point in the planning of new measurement campaigns that could be carried out in several nuclear and/or particle physics facilities around the world. A comprehensive evaluation of other isotopes Z ≤ 30 will be a subject of follow-up studies.

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Isotopic cross sections of 12C fragmentation on hydrogen measured at 1.87 and 2.69 GeV/nucleon

Cited by 16 publications

References 17 publications

Cosmic rays, antihelium, and an old navy spotlight

Cosmic rays, antihelium, and an old navy spotlight

A precision search for WIMPs with charged cosmic rays

Current status and desired precision of the isotopic production cross sections relevant to astrophysics of cosmic rays: Li, Be, B, C, and N

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