CERN Accelerating science

LHCb Note
Report number	arXiv:1705.05438 ; CERN-LHCb-PROC-2018-005
Title	Fixed target measurements at LHCb for cosmic rays physics
Author(s)	Graziani, Giacomo (Universita e INFN, Firenze (IT))
Collaboration	LHCb Collaboration
Note	Proceedings for the 52nd Rencontres de Moriond EW 2017
Submitted to	52nd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 18 - 25 Mar 2017, pp.261-268
Submitted by	[email protected] on 11 Jan 2018
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; LHCb
Abstract	The LHCb experiment has the unique possibility, among the LHC experiments, to be operated in fixed target mode, using its internal gas target. The energy scale achievable at the LHC, combined with the LHCb forward geometry and detector capabilities, allow to explore particle production in a wide Bjorken-$x$ range at the $\sqrt {s_{NN}} ~$ ~ 100 GeV energy scale, providing novel inputs to nuclear and cosmic ray physics. The first measurement of antiproton production in collisions of LHC protons on helium nuclei at rest is presented. The knowledge of this cross-section is of great importance for the study of the cosmic antiproton flux, and the LHCb results are expected to improve the interpretation of the recent high-precision measurements of cosmic antiprotons performed by the space-borne PAMELA and AMS-02 experiments.
Copyright/License	License Preprint: (License: CC-BY-4.0)

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