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

Abstract

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.

Phenomenological NLO analysis of η production at the LHC in the collider and fixed-target modes

“…Nowadays, the first analysed fixed-target data based on the SMOG LHCb system -initially designed to improve the luminosity determination in LHCb, now used as a low-density-unpolarisedgas target-are coming in [53,54] and confirm that the particle multiplicity in the LHCb detector is such that its performance in the fixed-target mode remains intact. One can thus consider that similar decay channels of the η c as those discussed for the collider mode could be studied if sufficient luminosities can be achieved.…”

On the Possibility to Study Antiproton Production at the SPD Detector at NICA Collider for Dark Matter Search in Astrophysical Experiments

“…2 are almost non-existent. In fact, the first ever measurement of prompt antiproton-production in pHe collisions was published by the LHCb collaboration only last August [21]. The dataset was collected in fixed-target mode with a kinetic energy of 6.5 TeV for the proton beam, and covered a pseudorapidity range of 2 < η < 5.…”

Initial and Final State Temperatures of Antiproton Emission Sources in High Energy Collisions

“…< p T < 2.8 GeV/c Erlang distribution Inverse power-law Antiproton production differential cross-section as a function of momentum, integrated over various transverse momentum ranges, in p+He collisions at 110 GeV. The data represent the results of LHCb Collaboration[39]. The solid and dashed curves represent the results fitted by the Erlang distribution Eq.…”