https://www.youtube.com/watch?v=gVR_2lyt7gU
Dr. Luca Micheletti (INFN Torino) talks about Quarkonium polarization: a new tool for studying heavy-ion collisionsParticle Physics on the Plains: Experiment

https://indico.ku.edu/event/142/?print=1
Polarization measurements represent an important tool for understanding the particle production mechanisms occurring in proton--proton collisions. In particular, for quarkonium states, the very small polarization measured at the LHC represents a serious and a long-lasting challenge for theoretical models. When considering heavy-ion collisions, particle polarization could also be used to

https://inspirehep.net/files/4747fd94e948092dc5a4ce5d5412039b
ILNUOVOCIMENTO44 C (2021)59. Quarkonium polarization in Pb-Pb collisions at the LHC with ALICE. Luca Micheletti onbehalfofthe ALICE Collaboration. INFN, Sezione di Torino - Torino, Italy. received12January2021 Summary. — Polarization measurements represent an important tool to investi- gate the production mechanisms of quarkonia, bound states

https://www.researchgate.net/publication/354290583_Measurement_of_quarkonium_polarization_in_Pb-Pb_collisions_at_the_LHC_with_ALICE
It provides excellent capabilities to study quarkonium production Kin proton-proton (pp) and heavy-ion (A-A) collisions in the kinematic range of vertical bar y vertical bar < 0.9 and 2.5 < y < 4.

https://www.researchgate.net/publication/2008188_Quarkonium_polarization_in_heavy_ion_collisions_as_a_possible_signature_of_the_quark--gluon_plasma
J/ψ polarization in heavy-ion collisions could be modified with respect to p+p collisions by various effects: 1) Quarkonium produced via (re)combination should be different from that of

https://www.semanticscholar.org/paper/Measurement-of-quarkonium-polarization-in-Pb-Pb-at-Micheletti/248809244e48dcdd83aad130d5edeeee1987f595
Polarization measurements represent an important tool for understanding the particle production mechanisms occurring in proton-proton collisions. In particular, for quarkonium states, the very small polarization measured at the LHC represents a long-lasting challenge for theoretical models. When considering heavy-ion collisions, particle polarization could also be used to investigate the

https://cds.cern.ch/record/2798106
Polarization measurements represent an important tool for understanding the particle production mechanisms occurring in proton-proton collisions. In particular, for quarkonium states, the very small polarization measured at the LHC represents a long-lasting challenge for theoretical models. When considering heavy-ion collisions, particle polarization could also be used to investigate the

https://arxiv.org/pdf/2105.02644v3.pdf
Heavy quarkonium is one of the key candidates to study the fundamental properties of Quark-Gluon Plasma (QGP) created in heavy-ion collisions. Comparing the production of the J= meson in proton-proton and heavy-ion collisions, namely the nuclear modi cation factor (R AA), can pro-vide some quantitative understanding of the QGP. Traditionally, the R

https://pos.sissa.it/387/095/
When considering heavy-ion collisions, particle polarization could also be used to investigate the characteristics of the hot and dense medium (Quark--Gluon Plasma, QGP) created at LHC energies. Recently, it has been hypothesized that quarkonium states could be polarized by the strong magnetic field generated in the early phase of the evolution

https://moriond.in2p3.fr/QCD/2021/FridayMorning/Micheletti.pdf
Rencontres de Moriond 2021 Overview Luca Micheletti ∗𝟎and 𝝓spin alignment in Pb-Pb collisions at 𝒔= . TeV J/ψand Υ(1S) polarization in Pb-Pb collisions at 𝒔= .𝟎 TeV PLB 815 (2021), ALICE collaboration "Measurement of spin-orbital angular momentum interactions in relativistic heavy-ion collisions"

https://www.sciencedirect.com/science/article/pii/S0370269321000861
The polarization of inclusive J / ψ and ϒ ( 1 S) produced in Pb-Pb collisions at s NN = 5.02 TeV at the LHC is measured with the ALICE detector. The study is carried out by reconstructing the quarkonium through its decay to muon pairs in the rapidity region 2.5 < y < 4 and measuring the polar and azimuthal angular distributions of the muons.

https://researchportal.helsinki.fi/files/164808953/1_s2.0_S0370269321000861_main.pdf
https://helda.helsinki.fi First measurement of quarkonium polarization in nuclear collisions at the LHC The ALICE collaboration 2021-04-10

https://arxiv.org/pdf/1207.2050.pdf
We also discuss (Sect. 6) how the polarization of vector quarkonia, measured from dilepton event samples, can be used as an instrument to study the suppression of ˜ c and ˜ b in heavy-ion collisions, where a direct determination of signal yields involving the identi cation of low-energy photons is essentially impossible. 2. Basic concepts

https://www.researchgate.net/publication/359390551_Quarkonium_polarization_in_PbPb_collisions_in_the_improved_color_evaporation_model
L. Micheletti [ALICE Collaboration], Measurement of quarkonium polarization in Pb-Pb collisions at the LHC with ALICE, PoS HardProbes2020, 095 (2021). Recommended publications Discover more about

https://www.semanticscholar.org/paper/New-approach-to-quarkonium-polarization-studies-Faccioli-Louren%C3%A7o/b7c59b07ce1eea6e39ff4af7804f3f2f6d594557
Significant progress in understanding quarkonium production requires improved polarization measurements, fully considering the intrinsic multidimensionality of the problem. We propose a frame-invariant formalism which minimizes the dependence of the measured result on the experimental acceptance, facilitates the comparison with theoretical calculations, and provides a much needed control over

https://arxiv.org/abs/2108.04524
Studies of quarkonium production in heavy-ion collisions can be used for probing QGP properties. The suppression and regeneration of bound quarkonium states is sensitive to the medium properties. Modifications of the quarkonium polarization in Pb-Pb collisions with respect to pp collisions may give further insight into the suppression and regeneration mechanisms in the QGP. Quarkonia are also

https://www.osti.gov/biblio/1868402
Sequential regeneration of charmonia in heavy-ion collisions. Du, Xiaojian; Rapp, Ralf ... Rigorous QCD analysis of inclusive annihilation and production of heavy quarkonium [Phys. Rev. D 51, 1125 (1995)] ... Measurement of quarkonium polarization in Pb-Pb collisions at the LHC with ALICE. Micheletti, Luca

https://inspirehep.net/literature/1121716
Abstract: (arXiv) Polarization measurements are the best instrument to understand how quark and antiquark combine into the different quarkonium states, but no model has so far succeeded in explaining the measured J/psi and Upsilon polarizations. On the other hand, the experimental data in proton-antiproton and proton-nucleus collisions are

https://www.researchgate.net/publication/228445677_Questions_and_prospects_in_quarkonium_polarization_measurements_fromproton-proton_to_nucleus-nucleus_collisions
This study sets the context for future low-pT quarkonium polarization measurements in proton- and pion-nucleus collisions, such as those to be made by the AMBER experiment, and shows that such

https://www.sciencedirect.com/science/article/pii/S014664102100065X
For a given heavy-quark mass, m Q, heavy-quarkonium production in hadron-hadron collisions can be divided into three kinematic regimes: P T 2 ≫ m Q 2, P T 2 ∼ m Q 2, and P T 2 ≪ m Q 2, which provide tools sensitive to very different, but often complementary, physics issues. For heavy-quarkonium production, QCD factorisation connects the

https://arxiv.org/pdf/2005.11128.pdf
hadrons [38]. Among the experimental observables studied in heavy-ion collisions the suppression of heavy quarkonium production is a fundamental signal, since QGP formation prevents the binding of the heavy-quark pair due to the screening of the color charge [39] and, more generally, has strong effects on the spectral functions [40]. At LHC

https://www.researchgate.net/publication/349727735_Jpsi_polarization_in_high_multiplicity_pp_and_pA_collisions_CGCNRQCD_approach
In this paper, we provide predictions on J/ψ polarization parameters in. high multiplicity proton-proton ( pp) and proton-n ucleus ( pA) collisions within the CGC+NRQCD. framework. Theoretical

https://www.researchgate.net/publication/341615529_First_measurement_of_quarkonium_polarization_in_nuclear_collisions_at_the_LHC
The study is carried out by reconstructing the quarkonium through its decay to muon pairs in the rapidity region $2.5<y<4$ and measuring the polar and azimuthal angular distributions of the muons