Measurement of Antiproton Production in p−He Collisions at sNN=110 GeV

Measurement of Antiproton Production in p−He Collisions at sNN=110 GeV

The cross section for prompt antiproton production in collisions of protons with an energy of 6.5 TeV incident on helium nuclei at rest is measured with the LHCb experiment from a data set corresponding to an integrated luminosity of 0.5 nb−1. The target is provided by injecting helium gas into the...

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Bibliographic Details
Published in:Physical review letters Vol. 121; no. 22; pp. 222001 - 222010
Main Author: Aaij, R
Format: Journal Article
Language:English
Published: College Park American Physical Society 29-11-2018
Subjects:
Antiparticles
Antiprotons
Collisions
Cosmic rays
Experiments
Física de partícules
Helium
Large Hadron Collider
Luminosity
Nuclear cross sections
Nuclei (nuclear physics)
Particle physics
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Description
Summary:The cross section for prompt antiproton production in collisions of protons with an energy of 6.5 TeV incident on helium nuclei at rest is measured with the LHCb experiment from a data set corresponding to an integrated luminosity of 0.5 nb−1. The target is provided by injecting helium gas into the LHC beam line at the LHCb interaction point. The reported results, covering antiproton momenta between 12 and 110 GeV/c, represent the first direct determination of the antiproton production cross section in p−He collisions, and impact the interpretation of recent results on antiproton cosmic rays from space-borne experiments.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.121.222001