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.

Midrapidity Antiproton-to-Proton ratio in pp Collisons at sqrt s=0.9 and 7 TeV measured by the ALICE experiment / Aamodt, K., Abel, N., Abeysekara, U., Abrahantes Quintana, A., Abramyan, A., Adamová, D., Aggarwal, M.M., Aglieri Rinella, G., Agocs, A.G., Aguilar Salazar, S., Ahammed, Z., Ahmad, A., Ahmad, N., Ahn, S.U., Akimoto, R., Akindinov, A., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Alici, A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 105:7(2010). [10.1103/PhysRevLett.105.072002]

Midrapidity Antiproton-to-Proton ratio in pp Collisons at sqrt s=0.9 and 7 TeV measured by the ALICE experiment

Bruno, G. E.;
2010

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.
2010
Midrapidity Antiproton-to-Proton ratio in pp Collisons at sqrt s=0.9 and 7 TeV measured by the ALICE experiment / Aamodt, K., Abel, N., Abeysekara, U., Abrahantes Quintana, A., Abramyan, A., Adamová, D., Aggarwal, M.M., Aglieri Rinella, G., Agocs, A.G., Aguilar Salazar, S., Ahammed, Z., Ahmad, A., Ahmad, N., Ahn, S.U., Akimoto, R., Akindinov, A., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Alici, A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 105:7(2010). [10.1103/PhysRevLett.105.072002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/2386
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