Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV
- Acharya, S;
- Acosta, FT;
- Adamová, D;
- Adolfsson, J;
- Aggarwal, MM;
- Aglieri Rinella, G;
- Agnello, M;
- Agrawal, N;
- Ahammed, Z;
- Ahn, SU;
- Aiola, S;
- Akindinov, A;
- Al-Turany, M;
- Alam, SN;
- Albuquerque, DSD;
- Aleksandrov, D;
- Alessandro, B;
- Alfaro Molina, R;
- Ali, Y;
- Alici, A;
- Alkin, A;
- Alme, J;
- Alt, T;
- Altenkamper, L;
- Altsybeev, I;
- Andrei, C;
- Andreou, D;
- Andrews, HA;
- Andronic, A;
- Angeletti, M;
- Anguelov, V;
- Anson, C;
- Antičić, T;
- Antinori, F;
- Antonioli, P;
- Anwar, R;
- Apadula, N;
- Aphecetche, L;
- Appelshäuser, H;
- Arcelli, S;
- Arnaldi, R;
- Arnold, OW;
- Arsene, IC;
- Arslandok, M;
- Audurier, B;
- Augustinus, A;
- Averbeck, R;
- Azmi, MD;
- Badalà, A;
- Baek, YW;
- Bagnasco, S;
- Bailhache, R;
- Bala, R;
- Baldisseri, A;
- Ball, M;
- Baral, RC;
- Barbano, AM;
- Barbera, R;
- Barile, F;
- Barioglio, L;
- Barnaföldi, GG;
- Barnby, LS;
- Barret, V;
- Bartalini, P;
- Barth, K;
- Bartsch, E;
- Bastid, N;
- Basu, S;
- Batigne, G;
- Batyunya, B;
- Batzing, PC;
- Bazo Alba, JL;
- Bearden, IG;
- Beck, H;
- Bedda, C;
- Behera, NK;
- Belikov, I;
- Bellini, F;
- Bello Martinez, H;
- Bellwied, R;
- Beltran, LGE;
- Belyaev, V;
- Bencedi, G;
- Beole, S;
- Bercuci, A;
- Berdnikov, Y;
- Berenyi, D;
- Bertens, RA;
- Berzano, D;
- Betev, L;
- Bhaduri, PP;
- Bhasin, A;
- Bhat, IR;
- Bhatt, H;
- Bhattacharjee, B;
- Bhom, J;
- Bianchi, A;
- Bianchi, L;
- Bianchi, N;
- Bielčík, J
- et al.
Published Web Location
https://doi.org/10.1103/PhysRevC.99.064901Abstract
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.