Measurement of Antiproton Production in ${\rm p He}$ Collisions at $\sqrt{s_{NN}}=110$ GeV - INSPIRE

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Measurement of Antiproton Production in ${\rm p He}$ Collisions at $\sqrt{s_{NN}}=110$ GeV

LHCb

Collaboration

Aug 18, 2018

10 pages

Published in:

Phys.Rev.Lett. 121 (2018) 22, 222001

Published: Nov 30, 2018

e-Print:

1808.06127 [hep-ex]

DOI:

10.1103/PhysRevLett.121.222001

Report number:

LHCb-PAPER-2018-031,
CERN-EP-2018-217

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (APS)

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.

Note:

All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2018-031.html •
Submitted to Phys.Rev.Lett.

Elementary Particles and Fields
p nucleus: interaction
anti-p: hadroproduction
anti-p: cosmic radiation
anti-p: momentum
helium: nucleus
helium: gas
vertex: primary
LHC-B
beam transport

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