Conveners
Parallel Session V: Quarkonia Production (II)
- Ramona Vogt (University of California at Davis)
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Gabriele Gaetano Fronze' (Universita e INFN Torino (IT))25/09/2016, 08:30
ALICE (A Large Ion Collider Experiment) is devoted to the study of heavy-ion collisions at LHC energies. It is predicted that a deconfined state of nuclear matter, the Quark-Gluon Plasma (QGP), is created in such collisions. The production of heavy quarkonia is modified in the presence of a QGP compared to the production in pp and p--Pb collisions. In particular, a suppression by colour...
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Zaochen Ye (UNIVERSITY OF ILLINOIS AT CHICAGO)25/09/2016, 08:50
Quark-Gluon Plasma (QGP), a new state of matter where quarks and gluons are de-confined, is believed to have existed up to a few milliseconds after the Big Bang. Quarkonia could dissociate in the QGP due to color screening of quark-antiquark potential by the surrounding partons in the medium, which was suggested as a signature of QGP formation in heavy-ion collisions. Moreover, different...
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Jean-Philippe Lansberg (IPN Orsay, Paris Sud U. / IN2P3-CNRS)25/09/2016, 09:10
We present the first application of the Comover Interaction Model (CIM) to $\Upsilon(nS)$ production in nucleus-nucleus and proton-nucleus collisions from fixed-target to collider energies. The CIM offers an elegant way to explain the relative suppression of the excited $\Upsilon$ states observed in proton-nucleus collisions at the LHC. From these relative suppressions, we are able to...
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Pol Gossiaux (Subatech)25/09/2016, 09:30
The suppression of upsilon Y(1S) states in AA collisions, observed by the STAR collaboration at RHIC and by the CMS and ALICE collaboration at LHC, is one of the most convincing evidence for the creation of the quark gluon plasma. The precise survival of excited Y(2S) and Y(3S) states vs ground state could even allow to measure the highest temperature reached in those collisions, according for...
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Yongsun Kim (Korea University (KR))25/09/2016, 09:50
Bottomonia are important probes of the quark-gluon plasma since they are produced at early times and propagate through the medium, mapping its evolution. The production cross sections of the three Y states (1S, 2S, 3S) were measured by CMS in pp and PbPb collisions at 2.76 TeV. A strong suppression is observed in PbPb collisions, by up to a factor of 2 and 10 for the Y(1S) and Y(2S)...
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