The production of the ρ(770)0 meson has been measured at midrapidity (|y| < 0.5) in pp and centrality differential Pb-Pb collisions at √s NN = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The particles have been reconstructed in the ρ(770)0 → π +π − decay channel in the transverse-momentum (pT ) range 0.5–11 GeV/c. A centrality-dependent suppression of the ratio of the integrated yields 2ρ(770)0/(π + + π − ) is observed. The ratio decreases by ∼40% from pp to central Pb-Pb collisions. A study of the pT -differential 2ρ(770) 0/(π + + π − ) ratio reveals that the suppression occurs at low transverse momenta, pT < 2 GeV/c. At higher momentum, particle ratios measured in heavy-ion and pp collisions are consistent. The observed suppres- sion is very similar to that previously measured for the K∗(892) 0 /K ratio and is consistent with EPOS3 predictions that may imply that rescattering in the hadronic phase is a dominant mechanism for the observed suppression

The production of the ρ(770)0 meson has been measured at midrapidity (|y| < 0.5) in pp and centrality differential Pb-Pb collisions at √sNN = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The particles have been reconstructed in the ρ(770)0 → π+π− decay channel in the transverse-momentum (pT ) range 0.5–11 GeV/c. A centrality-dependent suppression of the ratio of the integrated yields 2ρ(770)0/(π+ + π−) is observed. The ratio decreases by ∼40% from pp to central Pb-Pb collisions. A study of the pT -differential 2ρ(770)0/(π+ + π−) ratio reveals that the suppression occurs at low transverse momenta, pT < 2 GeV/c. At higher momentum, particle ratios measured in heavy-ion and pp collisions are consistent. The observed suppression is very similar to that previously measured for the K∗ (892)0 /K ratio and is consistent with EPOS3 predictions that may imply that rescattering in the hadronic phase is a dominant mechanism for the observed suppression.qu

Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV / Acharya, S., Acosta, F.T.-., Adamová, D., Adolfsson, J., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S.U., Aiola, S., Akindinov, A., Al-Turany, M., Alam, S.N., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Ali, Y., Alici, A., et al.. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 99:6(2019). [10.1103/PhysRevC.99.064901]

Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV

Cunqueiro, L.;Toppi, M.;
2019

Abstract

The production of the ρ(770)0 meson has been measured at midrapidity (|y| < 0.5) in pp and centrality differential Pb-Pb collisions at √s NN = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The particles have been reconstructed in the ρ(770)0 → π +π − decay channel in the transverse-momentum (pT ) range 0.5–11 GeV/c. A centrality-dependent suppression of the ratio of the integrated yields 2ρ(770)0/(π + + π − ) is observed. The ratio decreases by ∼40% from pp to central Pb-Pb collisions. A study of the pT -differential 2ρ(770) 0/(π + + π − ) ratio reveals that the suppression occurs at low transverse momenta, pT < 2 GeV/c. At higher momentum, particle ratios measured in heavy-ion and pp collisions are consistent. The observed suppres- sion is very similar to that previously measured for the K∗(892) 0 /K ratio and is consistent with EPOS3 predictions that may imply that rescattering in the hadronic phase is a dominant mechanism for the observed suppression
2019
The production of the ρ(770)0 meson has been measured at midrapidity (|y| &lt; 0.5) in pp and centrality differential Pb-Pb collisions at √sNN = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The particles have been reconstructed in the ρ(770)0 → π+π− decay channel in the transverse-momentum (pT ) range 0.5–11 GeV/c. A centrality-dependent suppression of the ratio of the integrated yields 2ρ(770)0/(π+ + π−) is observed. The ratio decreases by ∼40% from pp to central Pb-Pb collisions. A study of the pT -differential 2ρ(770)0/(π+ + π−) ratio reveals that the suppression occurs at low transverse momenta, pT &lt; 2 GeV/c. At higher momentum, particle ratios measured in heavy-ion and pp collisions are consistent. The observed suppression is very similar to that previously measured for the K∗ (892)0 /K ratio and is consistent with EPOS3 predictions that may imply that rescattering in the hadronic phase is a dominant mechanism for the observed suppression.qu
quark gluon plasma
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Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV / Acharya, S., Acosta, F.T.-., Adamová, D., Adolfsson, J., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S.U., Aiola, S., Akindinov, A., Al-Turany, M., Alam, S.N., Albuquerque, D.S.D., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Ali, Y., Alici, A., et al.. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 99:6(2019). [10.1103/PhysRevC.99.064901]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1488816
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