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 anti-Λ → anti-p π+ decays from promptly produced anti-Λ 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.

Aaij, R., Abdelmotteleb, A., Beteta, C.A., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Measurement of Antiproton Production from Antihyperon Decays in p He Collisions at √s_NN = 110 GeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 83(6), 1-19 [10.1140/epjc/s10052-023-11673-x].

Measurement of Antiproton Production from Antihyperon Decays in p He Collisions at √s_NN = 110 GeV

Carbone, A;Ferrari, F;Galli, D;Manuzzi, D;Patrignani, C;Villa, A;Zucchelli, S;
2023

Abstract

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 anti-Λ → anti-p π+ decays from promptly produced anti-Λ 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.
2023
Aaij, R., Abdelmotteleb, A., Beteta, C.A., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Measurement of Antiproton Production from Antihyperon Decays in p He Collisions at √s_NN = 110 GeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 83(6), 1-19 [10.1140/epjc/s10052-023-11673-x].
Aaij, R; Abdelmotteleb, ASW; Beteta, CA; Abudinén, F; Ackernley, T; Adeva, B; Adinolfi, M; Afsharnia, H; Agapopoulou, C; Aidala, CA; Aiola, S; Ajaltou...espandi
File in questo prodotto:
File Dimensione Formato  
2023-AR-08-Meas_Antiproton_Prod_from_Antihyperon_Dec_in_pHe-EPJC.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 2.76 MB
Formato Adobe PDF
2.76 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/951857
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 3
social impact