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Measurement of the flow harmonic correlations in pp, p+Pb and low multiplicity Pb+Pb collisions with the ATLAS detector at the LHC
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.ORCID-id: 0000-0002-1253-8583
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Högenergifysik.
Vise andre og tillknytning
Rekke forfattare: 29192019 (engelsk)Inngår i: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 982, s. 479-482Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Recent measurements of the correlations between flow harmonics obtained using four-particle symmetric cumulants and three-particle asymmetric cumulants with the ATLAS detector at the LHC are described. The data sets of pp, p+Pb and peripheral Pb+Pb collisions at various energies are analyzed, aiming to probe the long-range collective nature of multi-particle production in small systems. The sensitivity of the standard cumulant method to non-flow correlations is investigated by introducing the subevents method. A systematic reduction of non-flow effects is observed when using the two-subevent method. Further reduction is observed with the three-subevent method that is consistent with the results obtained with the four-subevent one. A negative correlation between v(2) and v(3) and a positive correlation between v(2) and v(4), for all studied collision systems and over full multiplicity range, is observed. The correlation strength computed as symmetric cumulants normalized by the < v(n)(2)> is similar for all collision systems and weakly depends on multiplicity. These measurements provide new evidence for long-range multi-particle collectivity in small collision systems and quantify the nature of its event-by-event fluctuations.

sted, utgiver, år, opplag, sider
2019. Vol. 982, s. 479-482
Emneord [en]
QGP, heavy ion collisions, small systems, collectivity, symmetric cumulants, subevent cumulants
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-378202DOI: 10.1016/j.nuclphysa.2018.09.076ISI: 000457515500105OAI: oai:DiVA.org:uu-378202DiVA, id: diva2:1294216
Konferanse
XXVIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2018)
Merknad

For complete list of authors see http://dx.doi.org/10.1016/j.nuclphysa.2018.09.076

Tilgjengelig fra: 2019-03-06 Laget: 2019-03-06 Sist oppdatert: 2019-03-06bibliografisk kontrollert

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Derendarz, DominikAsimakopoulou, Eleni M.Bergeås Kuutmann, ElinBokan, PetarBrenner, RichardEkelöf, TordEllert, MattiasFerrari, ArnaudGradin, P. O. JoakimIsacson, MaxMårtensson, Mikael U. F.Sales De Bruin, Pedro
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