Observation and Measurement of Forward Proton Scattering in Association with Lepton Pairs Produced via the Photon Fusion Mechanism at ATLAS
Volume
125
Pagination
261801 - ?
Publisher
DOI
10.1103/physrevlett.125.261801
Journal
Physical Review Letters
Issue
ISSN
0031-9007
Metadata
Show full item recordAbstract
The observation of forward proton scattering in association with lepton pairs (
e
+
e
−
+
p
or
μ
+
μ
−
+
p
) produced via photon fusion is presented. The scattered proton is detected by the ATLAS Forward Proton spectrometer, while the leptons are reconstructed by the central ATLAS detector. Proton-proton collision data recorded in 2017 at a center-of-mass energy of
√
s
=
13
TeV
are analyzed, corresponding to an integrated luminosity of
14.6
fb
−
1
. A total of 57 (123) candidates in the
e
e
+
p
(
μ
μ
+
p
) final state are selected, allowing the background-only hypothesis to be rejected with a significance exceeding 5 standard deviations in each channel. Proton-tagging techniques are introduced for cross-section measurements in the fiducial detector acceptance, corresponding to
σ
e
e
+
p
=
11.0
±
2.6
(
stat
)
±
1.2
(
syst
)
±
0.3
(
lumi
)
and
σ
μ
μ
+
p
=
7.2
±
1.6
(
stat
)
±
0.9
(
syst
)
±
0.2
(
lumi
)
fb
in the dielectron and dimuon channel, respectively.
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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