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Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN=2.76TeV
- Acharya, S;
- Acosta, F T-;
- Adamová, D;
- Adolfsson, J;
- Aggarwal, MM;
- Rinella, G Aglieri;
- Agnello, M;
- Agrawal, N;
- Ahammed, Z;
- Ahn, SU;
- Aiola, S;
- Akindinov, A;
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- Alam, SN;
- Albuquerque, DSD;
- Aleksandrov, D;
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- Bartsch, E;
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- Basu, S;
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- Batzing, PC;
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- Bearden, IG;
- Beck, H;
- Bedda, C;
- Behera, NK;
- Belikov, I;
- Bellini, F;
- Martinez, H Bello;
- Bellwied, R;
- Beltran, LGE;
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- Bencedi, G;
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- Cosentino, MR;
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- Cuautle, E;
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- Degenhardt, HF;
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- Dietel, T;
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- Djuvsland, Ø;
- Dobrin, A;
- Gimenez, D Domenicis;
- Dönigus, B;
- Dordic, O;
- Doremalen, LVR;
- Dubey, AK;
- Dubla, A;
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- Dudi, S;
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- Feldkamp, L;
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- Feofilov, G;
- Téllez, A Fernández;
- Ferretti, A;
- Festanti, A;
- Feuillard, VJG;
- Figiel, J;
- Figueredo, MAS;
- Filchagin, S;
- Finogeev, D;
- Fionda, FM;
- Fiorenza, G;
- Floris, M;
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- Foka, P;
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- Gianotti, P;
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- Giubilato, P;
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- Grabski, V;
- Graczykowski, LK;
- Graham, KL;
- Greiner, L;
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- Grigoriev, V;
- Grigoryan, A;
- Grigoryan, S;
- Gronefeld, JM;
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- Guerzoni, B;
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- Gulbrandsen, K;
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- Gupta, A;
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- Hannigan, R;
- Haque, MR;
- Harris, JW;
- Harton, A;
- Hassan, H;
- Hatzifotiadou, D;
- Hayashi, S;
- Heckel, ST;
- Hellbär, E;
- Helstrup, H;
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- Hernandez, EG;
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- Herrmann, F;
- Hetland, KF;
- Hilden, TE;
- Hillemanns, H;
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- Hohlweger, B;
- Horak, D;
- Hornung, S;
- Hosokawa, R;
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Published Web Location
https://doi.org/10.1103/PhysRevC.99.064901No data is associated with this publication.
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.