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 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.
| Original language | English (US) |
|---|---|
| Article number | 064901 |
| Journal | Physical Review C |
| Volume | 99 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 4 2019 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Cite this
Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV. / ALICE Collaboration.
In: Physical Review C, Vol. 99, No. 6, 064901, 04.06.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV
AU - ALICE Collaboration
AU - Acharya, S.
AU - Acosta, F. T.
AU - Adamová, D.
AU - Adolfsson, J.
AU - Aggarwal, M. M.
AU - Aglieri Rinella, G.
AU - Agnello, M.
AU - Agrawal, N.
AU - Ahammed, Z.
AU - Ahn, S. U.
AU - Aiola, S.
AU - Akindinov, A.
AU - Al-Turany, M.
AU - Alam, S. N.
AU - Albuquerque, D. S.D.
AU - Aleksandrov, D.
AU - Alessandro, B.
AU - Alfaro Molina, R.
AU - Ali, Y.
AU - Alici, A.
AU - Alkin, A.
AU - Alme, J.
AU - Alt, T.
AU - Altenkamper, L.
AU - Altsybeev, I.
AU - Andrei, C.
AU - Andreou, D.
AU - Andrews, H. A.
AU - Andronic, A.
AU - Angeletti, M.
AU - Anguelov, V.
AU - Anson, C.
AU - Antičić, T.
AU - Antinori, F.
AU - Antonioli, P.
AU - Anwar, R.
AU - Apadula, N.
AU - Aphecetche, L.
AU - Appelshäuser, H.
AU - Arcelli, S.
AU - Arnaldi, R.
AU - Arnold, O. W.
AU - Arsene, I. C.
AU - Arslandok, M.
AU - Audurier, B.
AU - Augustinus, A.
AU - Averbeck, R.
AU - Azmi, M. D.
AU - Badalà, A.
AU - Seger, J. E.
PY - 2019/6/4
Y1 - 2019/6/4
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevC.99.064901
DO - 10.1103/PhysRevC.99.064901
M3 - Article
AN - SCOPUS:85067416487
VL - 99
JO - Physical Review C
JF - Physical Review C
SN - 2469-9985
IS - 6
M1 - 064901
ER -