Medium-Induced Modification of Z-Tagged Charged Particle Yields in Pb plus Pb Collisions at 5.02 TeV with the ATLAS Detector
Volume
126
Publisher
DOI
10.1103/PhysRevLett.126.072301
Journal
PHYSICAL REVIEW LETTERS
Issue
ISSN
0031-9007
Metadata
Show full item recordAbstract
The yield of charged particles opposite to a
Z
boson with large transverse momentum (
p
T
) is measured in
260
pb
−
1
of
p
p
and
1.7
nb
−
1
of
Pb
+
Pb
collision data at 5.02 TeV per nucleon pair recorded with the ATLAS detector at the Large Hadron Collider. The
Z
boson tag is used to select hard-scattered partons with specific kinematics, and to observe how their showers are modified as they propagate through the quark-gluon plasma created in
Pb
+
Pb
collisions. Compared with
p
p
collisions, charged-particle yields in
Pb
+
Pb
collisions show significant modifications as a function of charged-particle
p
T
in a way that depends on event centrality and
Z
boson
p
T
. The data are compared with a variety of theoretical calculations and provide new information about the medium-induced energy loss of partons in a
p
T
regime difficult to measure through other channels.
Authors
Aad, G; Abbott, B; Abbott, DC; Abud, AA; Abeling, K; Abhayasinghe, DK; Abidi, SH; AbouZeid, OS; Abraham, NL; Abramowicz, HCollections
- Particle Physics [971]
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