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Electromagnetic processes with quasireal photons in Pb plus Pb collisions: QED, QCD, and the QGP
Brookhaven Natl Lab, Upton, NY 11973 USA.;Brookhaven Natl Lab, Phys Dept, Upton, NY USA..
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3867-0336
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8015-7512
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-5935-7464
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2019 (English)In: Nuclear Physics A, ISSN 0375-9474, E-ISSN 1873-1554, Vol. 982, p. 259-262Article in journal (Refereed) Published
Abstract [en]

Electromagnetic processes, both photon-photon and photon-nucleus, are shown to be useful in studying aspects of QED, QCD, and potentially the QGP. Using lead-lead collisions at root s(NN) = 5.02 TeV, the ATLAS detector has performed measurements of exclusive dimuon production, light-by-light scattering (via exclusive diphoton production), and photo-nuclear dijet production. These are all important examples of ultraperipheral collisions, where the nuclei do not interact hadronically. A recent study of the opening angles of dimuons produced in hadronic heavy-ion collisions, after subtracting heavy-flavor backgrounds, demonstrates that the dimuons carry information correlated with the overlap geometry, potentially about the density of charges in the QGP itself.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2019. Vol. 982, p. 259-262
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Subatomic Physics
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URN: urn:nbn:se:kth:diva-245157DOI: 10.1016/j.nuclphysa.2018.10.087ISI: 000457515500050Scopus ID: 2-s2.0-85060167400OAI: oai:DiVA.org:kth-245157DiVA, id: diva2:1294890
Note

QC 20190308

Available from: 2019-03-08 Created: 2019-03-08 Last updated: 2019-08-12Bibliographically approved

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Jensen, BengtOhm, ChristianRipellino, GiuliaSidebo, P. EdvinStrandberg, Jonas

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