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Midrapidity Antiproton-to-Proton Ratio in pp Collisons root s=0.9 and 7 TeV Measured by the ALICE Experiment

Aamodt K.
•
Abel N.
•
Abeysekara U.
altro
Zynovyev M.
2010
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at root 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 < p(t) < 1.05 GeV/c and rapidity vertical bar y vertical bar < 0.5. The ratio is measured to be R(vertical bar y vertical bar<0.5) = 0.957 +/- 0.006(stat) +/- 0.0014(syst) at 0.9 Tev and R(vertical bar y vertical bar<0.5) = 0.991 +/- 0.005 +/- 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.
DOI
10.1103/PhysRevLett.105.072002
WOS
WOS:000280850600005
Archivio
http://hdl.handle.net/11390/1125160
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77955626838
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metadata only access
Scopus© citazioni
97
Data di acquisizione
Jun 7, 2022
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Web of Science© citazioni
152
Data di acquisizione
Mar 28, 2024
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Data di acquisizione
Apr 19, 2024
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