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Photon-photon fusion and tau g-2 measurement in ATLAS

by Agnieszka Ogrodnik

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Submission summary

Authors (as registered SciPost users): Agnieszka Ogrodnik
Submission information
Preprint Link:  (pdf)
Date accepted: 2023-07-04
Date submitted: 2022-10-03 12:40
Submitted by: Ogrodnik, Agnieszka
Submitted to: SciPost Physics Proceedings
Proceedings issue: 51st International Symposium on Multiparticle Dynamics (ISMD2022)
Ontological classification
Academic field: Physics
  • High-Energy Physics - Experiment
  • Nuclear Physics - Experiment
Approach: Experimental


Relativistic heavy-ion beams at the LHC are accompanied by a large flux of equivalent photons. New measurements of exclusive dilepton production (electron, muon, and tau pairs) performed by the ATLAS experiment are discussed. We present the photon-induced production of tau pairs and constraints on the tau lepton's anomalous magnetic dipole moment. In addition, measurements of photon-induced electron and muon pair production are presented, which provide strong constraints on the nuclear photon flux and its dependence on the impact parameter and photon energy. Forward neutrons are utilised to provide an experimental handle on the impact parameter range sampled in the events.

Published as SciPost Phys. Proc. 15, 003 (2024)

Reports on this Submission

Anonymous Report 1 on 2022-11-28 (Invited Report)

  • Cite as: Anonymous, Report on arXiv:2209.15506v1, delivered 2022-11-28, doi: 10.21468/SciPost.Report.6219


1. A very clear and compact summary of recent ATLAS results in measurements of all three charged-lepton flavours in UPC interactions.


1. Some discussion of the meaning, origin, or significance of the model/data deviations and the tau g-2 fit (esp. the bifurcation) would have been nice, but the space was very limited.

2. Very minor presentational details such as some missing "the" articles and italic mu symbols in units (\textmu helps). But none obstructing comprehension.


A very good summary of the experimental activity in this area. Very suitable for publication in these proceedings. I recommend immediate publication and if the author feels they want to optionally resubmit with any additions in response to the comments, I am sure that can be accommodated.

Requested changes


  • validity: top
  • significance: high
  • originality: high
  • clarity: high
  • formatting: excellent
  • grammar: good

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