Measurement of antiproton production from antihyperon decays in [Formula omitted] collisions at [Formula omitted][Formula omitted]

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 [Formula om...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2023-06, Vol.83 (6)
Main Authors: Aaij, R, Abdelmotteleb, A. S. W, Beteta, C. Abellan, Abudinén, F, Ackernley, T, Adeva, B, Adinolfi, M
Format: Article
Language:English
Subjects:
Collisions (Nuclear physics)
Measurement
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Summary: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 [Formula omitted] 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 [Formula omitted]. The dominant antihyperon contribution, namely [Formula omitted] decays from promptly produced [Formula omitted] 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.
ISSN:1434-6044
DOI:10.1140/epjc/s10052-023-11673-x