Midrapidity antiproton-to-proton ratio in pp collisons root s=0.9 and 7 TeV measured by the ALICE experiment

K.  Aamodt....[et al.]; Ian Bearden; Hans Bøggild; Hans Hjersing Dalsgaard; Jens Jørgen Gaardhøje; Børge Svane Nielsen; Christian Holm Christensen; Casper Nygaard; Carsten Søgaard; Gaël Renault

doi:10.1103/PhysRevLett.105.072002

Midrapidity antiproton-to-proton ratio in pp collisons root s=0.9 and 7 TeV measured by the ALICE experiment

K. Aamodt....[et al.], Ian Bearden, Hans Bøggild, Hans Hjersing Dalsgaard, Jens Jørgen Gaardhøje, Børge Svane Nielsen, Christian Holm Christensen, Casper Nygaard, Carsten Søgaard, Gaël Renault

89 Citations (Scopus)

Abstract

The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at √s=0.9 and 7 TeV during the initial running periods of the Large Hadron Collider. The measurement covers the transverse momentum interval 0.45<pt<1.05GeV/c and rapidity |y|<0.5. The ratio is measured to be R|y|<0.5=0.957±0.006(stat)±0. 014(syst) at 0.9 TeV and R|y|<0.5=0.991±0.005(stat)±0.014(syst) at 7 TeV and it is independent of both rapidity and transverse momentum. The results are consistent with the conventional model of baryon-number transport and set stringent limits on any additional contributions to baryon-number transfer over very large rapidity intervals in pp collisions.

Original language	English
Journal	Physical Review Letters
Volume	105
Issue number	7
Pages (from-to)	072002
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.105.072002
Publication status	Published - 12 Aug 2010

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Aamodt....[et al.], K., Bearden, I., Bøggild, H., Dalsgaard, H. H., Gaardhøje, J. J., Nielsen, B. S., Christensen, C. H., Nygaard, C., Søgaard, C., & Renault, G. (2010). Midrapidity antiproton-to-proton ratio in pp collisons root s=0.9 and 7 TeV measured by the ALICE experiment. Physical Review Letters, 105(7), 072002. https://doi.org/10.1103/PhysRevLett.105.072002

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abstract = "The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at √s=0.9 and 7 TeV during the initial running periods of the Large Hadron Collider. The measurement covers the transverse momentum interval 0.45",

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AU - Bearden, Ian

AU - Bøggild, Hans

AU - Dalsgaard, Hans Hjersing

AU - Gaardhøje, Jens Jørgen

AU - Nielsen, Børge Svane

AU - Christensen, Christian Holm

AU - Nygaard, Casper

AU - Søgaard, Carsten

AU - Renault, Gaël

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DO - 10.1103/PhysRevLett.105.072002

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Midrapidity antiproton-to-proton ratio in pp collisons root s=0.9 and 7 TeV measured by the ALICE experiment

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