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Midrapidity antiproton-to-proton ratio in pp collisons at sqrt[s]=0.9 and 7 TeV measured by the ALICE experiment.
- Source :
-
Physical review letters [Phys Rev Lett] 2010 Aug 13; Vol. 105 (7), pp. 072002. Date of Electronic Publication: 2010 Aug 12. - Publication Year :
- 2010
-
Abstract
- The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at sqrt[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&#95;{t}<1.05 GeV/c and rapidity |y|<0.5. The ratio is measured to be R&#95;{|y|<0.5}=0.957±0.006(stat)±0.014(syst) at 0.9 TeV and R&#95;{|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.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 105
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 20868032
- Full Text :
- https://doi.org/10.1103/PhysRevLett.105.072002