skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electromagnetic processes with quasireal photons in Pb+Pb collisions: QED, QCD, and the QGP

Abstract

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 √ sNN = 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. Here 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.

Authors:
ORCiD logo [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1503103
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Physics. A
Additional Journal Information:
Journal Volume: 982; Journal Issue: C; Journal ID: ISSN 0375-9474
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Steinberg, Peter. Electromagnetic processes with quasireal photons in Pb+Pb collisions: QED, QCD, and the QGP. United States: N. p., 2019. Web. doi:10.1016/j.nuclphysa.2018.10.087.
Steinberg, Peter. Electromagnetic processes with quasireal photons in Pb+Pb collisions: QED, QCD, and the QGP. United States. doi:10.1016/j.nuclphysa.2018.10.087.
Steinberg, Peter. Tue . "Electromagnetic processes with quasireal photons in Pb+Pb collisions: QED, QCD, and the QGP". United States. doi:10.1016/j.nuclphysa.2018.10.087. https://www.osti.gov/servlets/purl/1503103.
@article{osti_1503103,
title = {Electromagnetic processes with quasireal photons in Pb+Pb collisions: QED, QCD, and the QGP},
author = {Steinberg, Peter},
abstractNote = {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 √sNN = 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. Here 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.},
doi = {10.1016/j.nuclphysa.2018.10.087},
journal = {Nuclear Physics. A},
issn = {0375-9474},
number = C,
volume = 982,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: (left) Acoplanarity distribution from exclusive dimuon production from photon-photon interactions. (right) Measured dimuon pair rapidity-dependent cross sections for three mass selections, compared to STARLIGHT 1.1 calculations. Results from Ref. [6].

Save / Share:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.