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.
|Titolo:||Midrapidity Antiproton-to-Proton Ratio in pp Collisons root s=0.9 and 7 TeV Measured by the ALICE Experiment|
|Data di pubblicazione:||2010|
|Citazione:||Midrapidity Antiproton-to-Proton Ratio in pp Collisons root s=0.9 and 7 TeV Measured by the ALICE Experiment / Vacchi, Andrea. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 105:7(2010).|
|Appare nelle tipologie:||1.1 Articolo in rivista|