The measurement of isotopic cross sections of<sup>12</sup>C beam fragmentation on liquid hydrogen at 3.66 GeV/nucleon

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

doi:10.1088/0954-3899/26/8/306

Cited by 18 publications

(19 citation statements)

References 28 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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“…Comparison between fragmentation model in DRAGON2 and measurements for the main channels fragmenting in 6 Li and 7 Li. Measurements shown with green (diamond) points are taken from GALPROP database, with red (circle) points from EXFOR and blue (triangle) from [36,37]. scaling phenomena for fragments reflect general properties of the reaction, and play a crucial role in the determination of semi-empirical formulae.…”

Section: Fragmentation Processesmentioning

confidence: 99%

Cosmic-ray propagation with DRAGON2: II. Nuclear interactions with the interstellar gas

Evoli

Gaggero

Vittino

et al. 2018

J. Cosmol. Astropart. Phys.

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Understanding the isotopic composition of cosmic rays (CRs) observed near Earth represents a milestone towards the identification of their origin. Local fluxes contain all the known stable and long-lived isotopes, reflecting the complex history of primaries and secondaries as they traverse the interstellar medium. For that reason, a numerical code which aims at describing the CR transport in the Galaxy must unavoidably rely on accurate modelling of the production of secondary particles.In this work we provide a detailed description of the nuclear cross sections and decay network as implemented in the forthcoming release of the galactic propagation code DRAGON2.We present the secondary production models implemented in the code and we apply the different prescriptions to compute quantities of interest to interpret local CR fluxes (e.g., nuclear fragmentation timescales, secondary and tertiary source terms). In particular, we develop a nuclear secondary production model aimed at accurately computing the light secondary fluxes (namely: Li, Be, B) above 1 GeV/n. This result is achieved by fitting existing empirical or semi-empirical formalisms to a large sample of measurements in the energy range 100 MeV/n to 100 GeV/n and by considering the contribution of the most relevant decaying isotopes up to iron. Concerning secondary antiparticles (positrons and antiprotons), we describe a collection of models taken from the literature, and provide a detailed quantitative comparison.

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The measurement of isotopic cross sections of¹²C beam fragmentation on liquid hydrogen at 3.66 GeV/nucleon

Cited by 18 publications

References 28 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

Cosmic-ray propagation with DRAGON2: II. Nuclear interactions with the interstellar gas

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The measurement of isotopic cross sections of12C beam fragmentation on liquid hydrogen at 3.66 GeV/nucleon

Cited by 18 publications

References 28 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

Cosmic-ray propagation with DRAGON2: II. Nuclear interactions with the interstellar gas

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Product

Resources

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The measurement of isotopic cross sections of¹²C beam fragmentation on liquid hydrogen at 3.66 GeV/nucleon