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

Title: Measurements of photo-nuclear jet production in Pb + Pb collisions with ATLAS

Abstract

Ultra-peripheral heavy ion collisions provide a unique opportunity to study the parton distributions in the colliding nuclei via the measurement of photo-nuclear jet production. An analysis of jet production in ultra-peripheral Pb+Pb collisions at √ sNN = 5.02 TeV performed using data collected with the ATLAS detector in 2015 is described. The data set corresponds to a total Pb+Pb integrated luminosity of 0.38 nb -1. The ultra-peripheral collisions are selected using a combination of forward neutron and rapidity gap requirements. The cross-sections, not unfolded for detector response, are compared to results from Pythia Monte Carlo simulations re-weighted to match a photon spectrum obtained from the STARlight model. As a result, qualitative agreement between data and these simulations is observed over a broad kinematic range suggesting that using these collisions to measure nuclear parton distributions is experimentally realisable.

Authors:
 [1]
  1. Columbia Univ., New York, NY (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1419310
Alternate Identifier(s):
OSTI ID: 1525253
Grant/Contract Number:  
[AC02-76SF00515; AC02-05CH11231]
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Physics. A
Additional Journal Information:
[ Journal Volume: 967; Journal Issue: C]; Journal ID: ISSN 0375-9474
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; UPC; photoproduction; jets; nuclear parton distributions

Citation Formats

Angerami, Aaron. Measurements of photo-nuclear jet production in Pb + Pb collisions with ATLAS. United States: N. p., 2017. Web. doi:10.1016/j.nuclphysa.2017.06.041.
Angerami, Aaron. Measurements of photo-nuclear jet production in Pb + Pb collisions with ATLAS. United States. doi:10.1016/j.nuclphysa.2017.06.041.
Angerami, Aaron. Mon . "Measurements of photo-nuclear jet production in Pb + Pb collisions with ATLAS". United States. doi:10.1016/j.nuclphysa.2017.06.041. https://www.osti.gov/servlets/purl/1419310.
@article{osti_1419310,
title = {Measurements of photo-nuclear jet production in Pb + Pb collisions with ATLAS},
author = {Angerami, Aaron},
abstractNote = {Ultra-peripheral heavy ion collisions provide a unique opportunity to study the parton distributions in the colliding nuclei via the measurement of photo-nuclear jet production. An analysis of jet production in ultra-peripheral Pb+Pb collisions at √sNN = 5.02 TeV performed using data collected with the ATLAS detector in 2015 is described. The data set corresponds to a total Pb+Pb integrated luminosity of 0.38 nb-1. The ultra-peripheral collisions are selected using a combination of forward neutron and rapidity gap requirements. The cross-sections, not unfolded for detector response, are compared to results from Pythia Monte Carlo simulations re-weighted to match a photon spectrum obtained from the STARlight model. As a result, qualitative agreement between data and these simulations is observed over a broad kinematic range suggesting that using these collisions to measure nuclear parton distributions is experimentally realisable.},
doi = {10.1016/j.nuclphysa.2017.06.041},
journal = {Nuclear Physics. A},
number = [C],
volume = [967],
place = {United States},
year = {2017},
month = {9}
}

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

Figures / Tables:

Fig. 1 Fig. 1: Double-differential cross-sections d2$\tilde{σ}$/d$H$$T$ d$x$A as a function of $x$A (left) and d2$\tilde{σ}$/d$H$$T$ d$z$$γ$ as a function of $z$$γ$ (right) for different bins of $H$$T$ . The cross-sections are scaled by successive powers of 10 to improve visibility. The dashed lines represent the cross-section from Pythia+STARlight scaled to havemore » the same integral as the data within the fiducial region of the measurement.« less

Save / Share:

Figures / Tables found in this record:

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