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Measurement of antiproton production from antihyperon decays in pHe collisions at √ˆšsNN=110 GeV
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- Aaij, R. (author)
- Univ Groningen, Van Swinderen Inst, Groningen, Netherlands;Univ Maastricht, Maastricht, Netherlands
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- Alexander, M. (author)
- Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland.
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- Bobulska, D. (author)
- Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland.
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- Univ Groningen, Van Swinderen Inst, Groningen, Netherlands;Univ Maastricht, Maastricht, Netherlands Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland (creator_code:org_t)
- SPRINGER, 2023
- 2023
- English.
- In: European Physical Journal C. - : SPRINGER. - 1434-6044 .- 1434-6052. ; 83
- Journal article (peer-reviewed)
Abstract
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- The interpretation of cosmic antiproton flux measurements from space-borne experiments is currently limited by the knowledge of the antiproton production cross-section in collisions between primary cosmic rays and the interstellar medium. Using collisions of protons with an energy of 6.5 TeV incident on helium nuclei at rest in the proximity of the interaction region of the LHCb experiment, the ratio of antiprotons originating from antihyperon decays to prompt production is measured for antiproton momenta between 12 and 110 GeV/c. The dominant antihyperon contribution, namely (Lambda) over bar -> (p) over bar pi(+) decays from promptly produced (Lambda) over bar particles, is also exclusively measured. The results complement the measurement of prompt antiproton production obtained from the same data sample. At the energy scale of this measurement, the antihyperon contributions to antiproton production are observed to be significantly larger than predictions of commonly used hadronic production models.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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- ref (subject category)
- art (subject category)
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- Aaij, R.
- Alexander, M.
- Bobulska, D.
- Douglas, L.
- Eklund, Lars
- Friday, D. A.
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- Grillo, L.
- Longstaff, I.
- McHugh, N. T.
- Petric, M.
- Schiller, M.
- Soler, F. J. P.
- Spradlin, P.
- Whitehead, M.
- Zunica, G.
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- Uppsala University
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