arxiv: 2605.04584 · v1 · submitted 2026-05-06 · ⚛️ nucl-ex · hep-ex

Recognition: unknown

Differential measurements of γγtoττ and constraints on τ-lepton electromagnetic moments in Pb+Pb collisions at sqrt{s_{_NN}} = 5.02 TeV with ATLAS

The ATLAS Collaboration

Pith reviewed 2026-05-08 16:26 UTC · model grok-4.3

classification ⚛️ nucl-ex hep-ex

keywords tau leptonanomalous magnetic momentelectric dipole momentgamma gamma collisionsultra-peripheral collisionsPb+Pb collisionsdifferential cross sectionselectromagnetic moments

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The pith

Differential measurements of photon-induced tau pair production in lead-lead collisions are used to set limits on the tau lepton anomalous magnetic moment and electric dipole moment.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The ATLAS experiment reports the first differential fiducial cross-section measurements of the process in which two photons produce a tau lepton pair during ultra-peripheral lead-lead collisions at the LHC. Events are selected where one tau decays to a muon and the other to an electron or charged tracks, divided into three analysis regions. Differential distributions are measured for muon pT, visible decay pT, total pT, invariant mass, and other kinematic variables. A maximum-likelihood fit to the muon pT spectra extracts the 95% CL intervals -0.057 < a_τ < 0.035 for the anomalous magnetic moment and |d_τ| < 2.7 × 10^{-16} e cm for the electric dipole moment.

Core claim

The paper establishes the first differential measurements of the γγ→ττ process in intact Pb+Pb collisions and uses a maximum-likelihood fit to the muon transverse momentum distributions in three fiducial regions to determine the tau-lepton anomalous magnetic moment a_τ and electric dipole moment d_τ, obtaining the observed intervals -0.057 < a_τ < 0.035 and |d_τ| < 2.7 × 10^{-16} e cm at 95% confidence level.

What carries the argument

A maximum-likelihood fit to the muon transverse-momentum distributions before unfolding, using theoretical templates that include the effects of non-zero electromagnetic moments on the tau pair kinematics.

If this is right

The measurements allow tests of photon flux models and spin correlation effects in the predictions.
Comparisons to next-to-leading-order electroweak predictions are made in the muon-electron channel.
The extracted limits constrain possible beyond-Standard-Model contributions to tau electromagnetic properties.
The differential information in multiple variables strengthens the constraints compared to rate-only measurements.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

The same data could be reanalyzed with improved theoretical models to potentially tighten the bounds on d_τ.
This method provides a new avenue for studying lepton electromagnetic moments that complements measurements from other experiments.
Future LHC runs with higher integrated luminosity in heavy-ion mode could significantly improve these constraints.

Load-bearing premise

The theoretical templates accurately capture how non-zero a_τ and d_τ values modify the observed muon transverse momentum distributions, including all effects from photon flux, spin correlations, backgrounds, and detector response.

What would settle it

An independent measurement or reanalysis of the Pb+Pb data that finds the best-fit values of a_τ or d_τ outside the stated 95% CL intervals after using the same or better modeling would show the current limits to be incorrect.

Figures

Figures reproduced from arXiv: 2605.04584 by The ATLAS Collaboration.

**Figure 1.** Figure 1: FIG. 1. 1 muon 1 electronIG. 1. 1 muon 1 electron ure 1: Schematic diagrams of view at source ↗

read the original abstract

This paper presents the first differential fiducial measurements of $\gamma\gamma\to\tau\tau$ using 1.93 nb$^{-1}$ of Pb+Pb data at $\sqrt{s_{_\text{NN}}} = 5.02$ TeV recorded by the ATLAS detector. Events in which one of the $\tau$-leptons decays into a muon and two neutrinos $\tau\to\nu_\tau\bar{\nu}_\mu\mu$ are selected and are categorized into three regions by the presence of an electron or either one or three charged-particle track(s) from the second $\tau$-lepton decay. The measurement is performed in events where both Pb ions remain intact and no neutrons are emitted. Differential cross-sections are measured for seven variables in three fiducial regions at particle level. The measurements are compared to theory predictions with different photon flux models and spin correlation effects. For the fiducial region with one muon and one electron in the final state, comparisons to next-to-leading-order electroweak predictions are also made. The transverse momentum ($p_\text{T}$) of the decay muon, the $p_\text{T}$ of the visible decay particles of the other $\tau$-lepton, the total $p_\text{T}$, invariant mass, and pseudorapidity of the visible particles from the di-$\tau$ system, and the rapidity and acoplanarity of the visible decay particles from either $\tau$-lepton are measured. A maximum-likelihood fit to the muon transverse-momentum distributions in the three regions before unfolding is performed to extract the $\tau$-lepton anomalous magnetic moment $a_{\tau}$ and electric dipole moment $d_{\tau}$, the latter for the first time in heavy ion collisions. The observed 95% confidence level intervals are $-0.057 <a_{\tau}< 0.035$ and $|d_{\tau}|< 2.7 \times 10^{-16}~e\text{cm}$.}

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Desk Editor's Note private letter to a colleague

ATLAS has delivered the first differential fiducial cross sections for γγ→ττ in Pb+Pb collisions plus the first d_τ limit from that channel, extracted via a pre-unfolding ML fit to muon p_T.

read the letter

The paper's core advance is the set of differential measurements in seven variables across three fiducial regions, all in events with no neutron emission from the Pb ions. They select one-muon events and split by the second tau decay (electron, one track, or three tracks), then compare the data to predictions that vary the photon flux model and include spin correlations. In the eμ channel they also show NLO electroweak comparisons. That is concrete new information on a process that has so far been measured only in total rate or in other collider environments. The a_τ and d_τ limits come from a maximum-likelihood fit directly to the observed muon p_T spectra in the three regions. Doing the fit before unfolding keeps the procedure simple and avoids propagating unfolding uncertainties into the moment extraction. The abstract notes that alternative photon-flux models were tested, which is the right check to make. The reported intervals are -0.057 < a_τ < 0.035 and |d_τ| < 2.7 × 10^{-16} e cm at 95 % CL. The main modeling assumption is that the templates correctly translate non-zero a_τ or d_τ into changes in the muon p_T shape, including all spin and background effects. If that mapping is accurate, the limits are valid; any residual mismatch would move the bounds. Nothing in the abstract suggests an internal inconsistency or circularity. The work is standard ATLAS quality with clear fiducial definitions and explicit theory comparisons. It is aimed at people who need differential data on photon-photon tau production or who want to use heavy-ion collisions to constrain tau electromagnetic moments. The measurement is solid enough and the d_τ result is new enough that it should go to peer review rather than a desk reject.

Referee Report

2 major / 2 minor

Summary. The manuscript reports the first differential fiducial measurements of the γγ→ττ process in ultraperipheral Pb+Pb collisions at √s_NN = 5.02 TeV with the ATLAS detector, using 1.93 nb^{-1} of data. Events are selected with one τ decaying to μνν and categorized into three regions according to the second τ decay (electron, one track, or three tracks). Differential cross sections are measured for seven kinematic variables in three fiducial regions at particle level and compared to predictions with varying photon-flux models and spin correlations; NLO electroweak predictions are also shown for the μe channel. A maximum-likelihood fit to the muon p_T distributions in the three regions (performed before unfolding) extracts 95% CL intervals on the τ anomalous magnetic moment a_τ and electric dipole moment d_τ (the latter for the first time in heavy-ion collisions): -0.057 < a_τ < 0.035 and |d_τ| < 2.7 × 10^{-16} e cm.

Significance. If the central extraction holds, the work supplies the first differential γγ→ττ data in heavy-ion collisions together with the first d_τ constraint from this channel. The differential distributions test photon-flux modeling and spin correlations in ultraperipheral collisions, while the direct fit to muon p_T provides competitive limits on the τ electromagnetic moments. These results are relevant for BSM searches and for validating theoretical tools used in future UPC studies.

major comments (2)

[maximum-likelihood fit procedure] The maximum-likelihood fit to the muon p_T distributions (described in the abstract and the results section): the reported 95% CL intervals on a_τ and d_τ rest on the assumption that the theoretical templates accurately propagate the effects of non-zero moments into the observed p_T shapes, including the chosen photon-flux model, spin correlations, backgrounds, and detector response. The manuscript notes comparisons to alternative photon-flux models and NLO electroweak predictions in one channel, but does not quantify the impact of these variations (or of residual mismatches in moment-induced kinematics, especially for d_τ) on the fitted intervals. This modeling step is load-bearing for the central claim.
[differential cross-section results] Differential cross-section measurements in the three fiducial regions: the paper performs unfolding after the fit, yet provides limited detail on the unfolding method, regularization, and propagation of systematic uncertainties from the three regions into the final distributions. Without this, it is difficult to assess whether the reported agreement with theory predictions is robust or whether unaccounted biases affect the subsequent moment extraction.

minor comments (2)

The abstract states the integrated luminosity as 1.93 nb^{-1}; ensure this value and the corresponding uncertainty are repeated with the same precision in the main text and tables.
[event selection] Clarify the exact definition of the three fiducial regions (electron, one-track, three-track) in a dedicated table or equation to avoid ambiguity when readers compare to the fit inputs.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their thorough review and for recognizing the significance of our results on the first differential measurements of γγ→ττ in heavy-ion collisions and the constraints on τ electromagnetic moments. We address the major comments below and will revise the manuscript accordingly to improve clarity and robustness.

read point-by-point responses

Referee: [maximum-likelihood fit procedure] The maximum-likelihood fit to the muon p_T distributions (described in the abstract and the results section): the reported 95% CL intervals on a_τ and d_τ rest on the assumption that the theoretical templates accurately propagate the effects of non-zero moments into the observed p_T shapes, including the chosen photon-flux model, spin correlations, backgrounds, and detector response. The manuscript notes comparisons to alternative photon-flux models and NLO electroweak predictions in one channel, but does not quantify the impact of these variations (or of residual mismatches in moment-induced kinematics, especially for d_τ) on the fitted intervals. This modeling step is load-bearing for the central claim.

Authors: We agree that quantifying the impact of modeling variations on the extracted intervals is important for assessing the robustness of the limits. In the revised version, we will add a dedicated study in the results section that evaluates the variation in the 95% CL intervals for a_τ and d_τ when using alternative photon-flux models (such as those compared in the differential cross-section measurements) and when incorporating NLO electroweak corrections for the μe channel. For d_τ, we will include a discussion of the sensitivity to potential kinematic mismatches in the templates. This will demonstrate that the central intervals are stable within the quoted uncertainties. revision: yes
Referee: [differential cross-section results] Differential cross-section measurements in the three fiducial regions: the paper performs unfolding after the fit, yet provides limited detail on the unfolding method, regularization, and propagation of systematic uncertainties from the three regions into the final distributions. Without this, it is difficult to assess whether the reported agreement with theory predictions is robust or whether unaccounted biases affect the subsequent moment extraction.

Authors: We acknowledge the need for more detailed documentation of the unfolding procedure. The revised manuscript will include an expanded description of the unfolding method, including the algorithm employed, the regularization procedure and its validation through closure tests, and the full propagation of systematic uncertainties from the three analysis regions to the unfolded distributions. We will also add information on how the post-unfolding distributions are used to validate the modeling assumptions underlying the moment extraction. revision: yes

Circularity Check

0 steps flagged

No circularity: extraction is a direct fit to data using external templates

full rationale

The paper performs differential cross-section measurements in fiducial regions and then conducts a maximum-likelihood fit directly to the observed muon p_T distributions (before unfolding) to extract a_τ and d_τ limits. This fit uses theoretical templates that incorporate the moments, photon flux, spin correlations, backgrounds, and detector response. No step reduces by the paper's own equations to a self-definition, a prior fit renamed as prediction, or a load-bearing self-citation chain; the reported 95% CL intervals are independent outputs from the data. The derivation chain is self-contained against external benchmarks and modeling assumptions.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The central claim rests on established Standard Model predictions for tau decays, photon-photon interactions, and detector response; no new free parameters, axioms beyond domain standards, or invented entities are introduced.

axioms (1)

domain assumption Standard Model predictions for tau lepton decays and photon flux in ultra-peripheral collisions are sufficiently accurate for template construction
Invoked when comparing data to theory predictions with different a_τ and d_τ values and when performing the maximum-likelihood fit

pith-pipeline@v0.9.0 · 5687 in / 1327 out tokens · 27822 ms · 2026-05-08T16:26:18.548204+00:00 · methodology

discussion (0)

Reference graph

Works this paper leans on

113 extracted references · 86 canonical work pages · 4 internal anchors

[1]

Breit and J

G. Breit and J. A. Wheeler,Collision of Two Light Quanta, Phys. Rev.46(1934) 1087

1934
[2]

Heisenberg and H

W. Heisenberg and H. Euler,Folgerungen aus der Diracschen Theorie des Positrons, Zeitschrift für Physik98(1936) 714, arXiv:physics/0605038

work page arXiv 1936
[3]

Schwinger,On Gauge Invariance and Vacuum Polarization, Phys

J. Schwinger,On Gauge Invariance and Vacuum Polarization, Phys. Rev.82(1951) 664

1951
[4]

S. R. Klein and P. Steinberg, Photonuclear and Two-Photon Interactions at High-Energy Nuclear Colliders, Ann. Rev. Nucl. Part. Sci.70(2020) 323, arXiv:2005.01872 [nucl-ex]

work page arXiv 2020
[5]

A. J. Baltz et al.,The physics of ultraperipheral collisions at the LHC, Phys. Rept.458(2008) 1, arXiv:0706.3356 [nucl-ex]

work page arXiv 2008
[6]

de Favereau de Jeneret et al.,High energy photon interactions at the LHC, (2009), arXiv:0908.2020 [hep-ph]

J. de Favereau de Jeneret et al.,High energy photon interactions at the LHC, (2009), arXiv:0908.2020 [hep-ph]

work page arXiv 2009
[7]

V. M. Budnev, I. F. Ginzburg, G. V. Meledin, and V. G. Serbo,The two-photon particle production mechanism. Physical problems. Applications. Equivalent photon approximation, Phys. Rept.15(1975) 181

1975
[8]

M.-S. Chen, I. J. Muzinich, H. Terazawa, and T. P. Cheng, Lepton Pair Production from Two-Photon Processes, Phys. Rev. D7(1973) 3485

1973
[9]

Eidelman and M

S. Eidelman and M. Passera,Theory of the𝜏lepton anomalous magnetic moment, Mod. Phys. Lett.A22(2007) 159, arXiv:hep-ph/0701260 [hep-ph]. 30

work page arXiv 2007
[10]

Yamaguchi and N

Y. Yamaguchi and N. Yamanaka,Large Long-Distance Contributions to the Electric Dipole Moments of Charged Leptons in the Standard Model, Phys. Rev. Lett.125(24 2020) 241802

2020
[11]

A. D. Sakharov,Violation of CP Invariance, C asymmetry, and baryon asymmetry of the universe, Pisma Zh. Eksp. Teor. Fiz.5(1967) 32

1967
[12]

Moyotl and G

A. Moyotl and G. Tavares-Velasco,Weak properties of the𝜏lepton via a spin-0 unparticle, Phys. Rev. D86(1 2012) 013014

2012
[13]

Iguro and T

S. Iguro and T. Kitahara,Electric dipole moments as probes of the𝑅𝐷 (∗) anomaly, Phys. Rev. D110(2024) 075008, arXiv:2307.11751 [hep-ph]

work page arXiv 2024
[14]

ATLAS Collaboration,Observation of the𝛾𝛾→𝜏𝜏Process in Pb+Pb Collisions and Constraints on the𝜏-Lepton Anomalous Magnetic Moment with the ATLAS Detector, Phys. Rev. Lett.131(2023) 151802, arXiv:2204.13478 [hep-ex]

work page arXiv 2023
[15]

CMS Collaboration,Observation of𝜏Lepton Pair Production in Ultraperipheral Pb–Pb Collisions at√𝑠NN =5.02TeV, Phys. Rev. Lett.131(2023) 151803, arXiv:2206.05192 [nucl-ex]

work page arXiv 2023
[16]

CMS Collaboration,Observation of𝛾𝛾→𝜏𝜏in proton-proton collisions and limits on the anomalous electromagnetic moments of the𝜏lepton, Rept. Prog. Phys.87(2024) 107801, arXiv:2406.03975 [hep-ex]

work page arXiv 2024
[17]

DELPHI Collaboration,Study of tau-pair production in photon-photon collisions at LEP and limits on the anomalous electromagnetic moments of the tau lepton, Eur. Phys. J. C35(2004) 159, arXiv:hep-ex/0406010 [hep-ex]

work page arXiv 2004
[18]

Acciarri et al.,Production of𝑒,𝜇and𝜏pairs in untagged two photon collisions at LEP, Phys

M. Acciarri et al.,Production of𝑒,𝜇and𝜏pairs in untagged two photon collisions at LEP, Phys. Lett. B407(1997) 341

1997
[19]

Achard et al.,Muon-pair and tau-pair production in two-photon collisions at LEP, Phys

P. Achard et al.,Muon-pair and tau-pair production in two-photon collisions at LEP, Phys. Lett. B585(2004) 53, arXiv:hep-ex/0402037

work page arXiv 2004
[20]

ATLAS Collaboration,A measurement of the high-mass𝜏¯𝜏production cross-section at√𝑠=13TeV with the ATLAS detector and constraints on new particles and couplings, JHEP10(2025) 054, arXiv:2503.19836 [hep-ex]

work page arXiv 2025
[21]

OPAL Collaboration,An upper limit on the anomalous magnetic moment of the𝜏lepton, Phys. Lett. B431(1998) 188, arXiv:hep-ex/9803020 [hep-ex]

work page arXiv 1998
[22]

L3 Collaboration, Measurement of the anomalous magnetic and electric dipole moments of the tau lepton, Phys. Lett. B434(1998) 169

1998
[23]

Belle Collaboration,An improved search for the electric dipole moment of the𝜏lepton, JHEP04(2022) 110, arXiv:2108.11543 [hep-ex]

work page arXiv 2022
[24]

ARGUS Collaboration,A search for the electric dipole moment of the𝜏−lepton, Phys. Lett. B485(2000) 37, arXiv:hep-ex/0004031

work page arXiv 2000
[25]

del Aguila, F

F. del Aguila, F. Cornet, and J. I. Illana,The possibility of using a large heavy-ion collider for measuring the electromagnetic properties of the tau lepton, Phys. Lett. B271(1991) 256

1991
[26]

Beresford and J

L. Beresford and J. Liu,New physics and tau𝑔−2using LHC heavy ion collisions, Phys. Rev. D102(2020) 113008, arXiv:1908.05180 [hep-ph]. 31

work page arXiv 2020
[27]

Dyndał, M

M. Dyndał, M. Kłusek-Gawenda, A. Szczurek, and M. Schott,Anomalous electromagnetic moments of𝜏lepton in𝛾𝛾→𝜏 +𝜏− reaction in Pb+Pb collisions at the LHC, Phys. Lett. B809(2020) 135682, arXiv:2002.05503 [hep-ph]

work page arXiv 2020
[28]

Bhide and V

K. Bhide and V. Lang, Probing optimal measurements of the electromagnetic dipole moments of the𝜏lepton, (2024), arXiv:2410.23070 [hep-ph]

work page arXiv 2024
[29]

D. Shao, B. Yan, S.-R. Yuan, and C. Zhang,Spin asymmetry and dipole moments in𝜏-pair production with ultraperipheral heavy ion collisions, Science China Physics, Mechanics & Astronomy67(2024) 281062, arXiv:2310.14153 [hep-ph]

work page arXiv 2024
[30]

Burmasov, E

N. Burmasov, E. Kryshen, P. Bühler, and R. Lavicka,Feasibility Studies of Tau-Lepton Anomalous Magnetic Moment Measurements in Ultraperipheral Collisions at the LHC, Physics of Particles and Nuclei54(2023) 590

2023
[31]

Verducci, C

M. Verducci, C. Roda, V. Cavasinni, and N. Vignaroli,Study of the measurement of the𝜏lepton anomalous magnetic moment in high energy lead-lead collisions at the LHC, Phys. Rev. D110(2024) 052001, arXiv:2307.15160 [hep-ph]

work page arXiv 2024
[32]

N. A. Burmasov, Search for New Physics in Ultraperipheral Collisions at the Large Hadron Collider, Physics of Atomic Nuclei85(2022) 942

2022
[33]

V. P. Goncalves, D. E. Martins, and M. S. Rangel, Exclusive dilepton production at forward rapidities in𝑃𝑏𝑃𝑏collisions, Eur. Phys. J. C81(2021) 220, arXiv:2012.08923 [hep-ph]

work page arXiv 2021
[34]

Atağ and A

S. Atağ and A. A. Billur,Possibility of determining𝜏lepton electromagnetic moments in 𝛾𝛾→𝜏 +𝜏− process at the CERN-LHC, JHEP11(2010) 060, arXiv:1005.2841 [hep-ph]

work page arXiv 2010
[35]

Beresford, S

L. Beresford, S. Clawson, and J. Liu, Strategy to measure tau g-2 via photon fusion in LHC proton collisions, Phys. Rev. D110(2024) 092016, arXiv:2403.06336 [hep-ph]

work page arXiv 2024
[36]

Haisch, L

U. Haisch, L. Schnell, and J. Weiss,LHC tau-pair production constraints on𝑎𝜏 and𝑑 𝜏, SciPost Phys.16(2024) 048, arXiv:2307.14133 [hep-ph]

work page arXiv 2024
[37]

Galon, A

I. Galon, A. Rajaraman, and T. M. P. Tait, 𝐻→𝜏 +𝜏−𝛾as a probe of the𝜏magnetic dipole moment, JHEP12(2016) 111, arXiv:1610.01601 [hep-ph]

work page arXiv 2016
[38]

Cao, H.-R

Q.-H. Cao, H.-R. Jiang, B. Li, Y. Liu, and G. Zeng, Probing magnetic moment operators in𝑯𝛾production and𝑯→𝜏 +𝜏−𝛾rare decay, Chinese Physics C45(2021) 093108, arXiv:2106.04143 [hep-ph]

work page arXiv 2021
[39]

Bernabéu, G.A

J. Bernabéu, G.A. González-Sprinberg, J. Papavassiliou and J. Vidal, Tau anomalous magnetic moment form factor at super B/flavor factories, Nuclear Physics B790(2008) 160,issn: 0550-3213

2008
[40]

Bernabéu, G.A

J. Bernabéu, G.A. González-Sprinberg and J. Vidal, Tau spin correlations and the anomalous magnetic moment, Journal of High Energy Physics2009(2009) 062. 32

2009
[41]

Eidelman, D

S. Eidelman, D. Epifanov, M. Fael, L. Mercolli, and M. Passera, 𝜏dipole moments via radiative leptonic𝜏decays, JHEP03(2016) 140, arXiv:1601.07987 [hep-ph]

work page arXiv 2016
[42]

A. S. Fomin, A. Y. Korchin, A. Stocchi, S. Barsuk, and P. Robbe,Feasibility of𝜏-lepton electromagnetic dipole moments measurement using bent crystal at the LHC, JHEP03(2019) 156, arXiv:1810.06699 [hep-ph]

work page arXiv 2019
[43]

Fu et al.,Novel Method for the Direct Measurement of the𝜏Lepton Dipole Moments, Phys

J. Fu et al.,Novel Method for the Direct Measurement of the𝜏Lepton Dipole Moments, Phys. Rev. Lett.123(2019) 011801, arXiv:1901.04003 [hep-ex]

work page arXiv 2019
[44]

ATLAS Collaboration,The ATLAS Experiment at the CERN Large Hadron Collider, JINST3(2008) S08003

2008
[45]

ATLAS Collaboration,ATLAS Insertable B-Layer Technical Design Report, ATLAS-TDR-19; CERN-LHCC-2010-013, 2010, url:https://cds.cern.ch/record/1291633, Addendum: ATLAS-TDR-19-ADD-1; CERN-LHCC-2012-009, 2012,url:https://cds.cern.ch/record/1451888

work page arXiv 2010
[46]

Abbott et al.,Production and integration of the ATLAS Insertable B-Layer, JINST13(2018) T05008, arXiv:1803.00844 [physics.ins-det]

B. Abbott et al.,Production and integration of the ATLAS Insertable B-Layer, JINST13(2018) T05008, arXiv:1803.00844 [physics.ins-det]

work page arXiv 2018
[47]

ATLAS Collaboration,Zero Degree Calorimeters for ATLAS, CERN-LHCC-2007-001, 2007, url:https://cds.cern.ch/record/1009649

work page arXiv 2007
[48]

Avoni et al., The new LUCID-2 detector for luminosity measurement and monitoring in ATLAS, JINST13(2018) P07017

G. Avoni et al., The new LUCID-2 detector for luminosity measurement and monitoring in ATLAS, JINST13(2018) P07017

2018
[49]

ATLAS Collaboration,Performance of the ATLAS trigger system in 2015, Eur. Phys. J. C77(2017) 317, arXiv:1611.09661 [hep-ex]

work page Pith review arXiv 2015
[50]

ATLAS Collaboration,Operation of the ATLAS trigger system in Run 2, JINST15(2020) P10004, arXiv:2007.12539 [physics.ins-det]

work page arXiv 2020
[51]

ATLAS Collaboration,The ATLAS Collaboration Software and Firmware, ATL-SOFT-PUB-2021-001, 2021,url:https://cds.cern.ch/record/2767187

work page arXiv 2021
[52]

ATLAS Collaboration, ATLAS data quality operations and performance for 2015–2018 data-taking, JINST15(2020) P04003, arXiv:1911.04632 [physics.ins-det]

work page arXiv 2015
[53]

S. R. Klein, J. Nystrand, J. Seger, Y. Gorbunov, and J. Butterworth, STARlight: A Monte Carlo simulation program for ultra-peripheral collisions of relativistic ions, Comput. Phys. Commun.212(2017) 258, arXiv:1607.03838 [hep-ph]

work page arXiv 2017
[54]

An Introduction to PYTHIA 8.2

T. Sjöstrand et al.,An introduction to PYTHIA 8.2, Comput. Phys. Commun.191(2015) 159, arXiv:1410.3012 [hep-ph]

work page internal anchor Pith review arXiv 2015
[55]

Jadach, Z

S. Jadach, Z. Was, R. Decker, and J. H. Kühn,The𝜏decay library TAUOLA, version 2.4, Comput. Phys. Commun.76(1993) 361

1993
[56]

Davidson, G

N. Davidson, G. Nanava, T. Przedzinski, E. Richter-Was, and Z. Was, Universal interface of TAUOLA: Technical and physics documentation, Comput. Phys. Commun.183(2012) 821, arXiv:1002.0543 [hep-ph]. 33

work page arXiv 2012
[57]

Davidson, T

N. Davidson, T. Przedzinski, and Z. Was, PHOTOS interface in C++: Technical and Physics Documentation, Comput. Phys. Commun.199(2016) 86, arXiv:1011.0937 [hep-ph]

work page arXiv 2016
[58]

A. Yu. Korchin, E. Richter-Was, and Z. Was, TauSpinner Algorithms for Including Spin and New Physics Effects in𝛾𝛾→𝜏𝜏Process, Acta Phys. Polon. B56(2025) 10, arXiv:2506.15213 [hep-ph]

work page arXiv 2025
[59]

Przedzinski, E

T. Przedzinski, E. Richter-Was, and Z. Was,Documentation of𝑇 𝑎𝑢𝑆 𝑝𝑖𝑛𝑛𝑒𝑟 algorithms: program for simulating spin effects in𝜏-lepton production at LHC, Eur. Phys. J. C79(2019) 91, arXiv:1802.05459 [hep-ph]

work page arXiv 2019
[60]

Czyczula, T

Z. Czyczula, T. Przedzinski, and Z. Was, TauSpinner Program for Studies on Spin Effect in tau Production at the LHC, Eur. Phys. J. C72(2012) 1988, arXiv:1201.0117 [hep-ph]

work page arXiv 2012
[61]

Shao and D

H.-S. Shao and D. d’Enterria,gamma-UPC: automated generation of exclusive photon-photon processes in ultraperipheral proton and nuclear collisions with varying form factors, JHEP09(2022) 248, arXiv:2207.03012 [hep-ph]

work page arXiv 2022
[62]

J. Alwall et al.,The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations, JHEP07(2014) 079, arXiv:1405.0301 [hep-ph]

work page internal anchor Pith review arXiv 2014
[63]

ATLAS Collaboration,Exclusive dimuon production in ultraperipheral Pb+Pb collisions at√𝑠NN =5.02TeV with ATLAS, Phys. Rev. C104(2021) 024906, arXiv:2011.12211 [nucl-ex]

work page arXiv 2021
[64]

L. A. Harland-Lang, V. A. Khoze, and M. G. Ryskin, Exclusive LHC physics with heavy ions: SuperChic 3, Eur. Phys. J. C79(2019) 39, arXiv:1810.06567 [hep-ph]

work page arXiv 2019
[65]

ATLAS Collaboration,Exclusive dielectron production in ultraperipheral Pb+Pb collisions at√𝑠NN =5.02TeV with ATLAS, JHEP06(2023) 182, arXiv:2207.12781 [nucl-ex]

work page arXiv 2023
[66]

Fermi,Über die Theorie des Stoßes zwischen Atomen und elektrisch geladenen Teilchen, Zeitschrift für Physik29(1924) 315

E. Fermi,Über die Theorie des Stoßes zwischen Atomen und elektrisch geladenen Teilchen, Zeitschrift für Physik29(1924) 315

1924
[67]

Fermi,Sulla teoria dell’ urto tra atomi e corpuscoli elettrici, Il Nuovo Cimento (1924-1942)2(1925) 143, ed

E. Fermi,Sulla teoria dell’ urto tra atomi e corpuscoli elettrici, Il Nuovo Cimento (1924-1942)2(1925) 143, ed. by W. J. Marciano and S. White, arXiv:hep-th/0205086

work page arXiv 1924
[68]

Weizsäcker,Ausstrahlung bei Stößen sehr schneller Elektronen, Zeitschrift für Physik88(1934) 612

C. Weizsäcker,Ausstrahlung bei Stößen sehr schneller Elektronen, Zeitschrift für Physik88(1934) 612

1934
[69]

E. J. Williams,Correlation of certain collision problems with radiation theory, Kong. Dan. Vid. Sel. Mat. Fys. Med.13N4(1935) 1, url:https://gymarkiv.sdu.dk/MFM/kdvs/mfm%2010-19/mfm-13-4.pdf

1935
[70]

M. S. Zolotorev and K. T. McDonald, Classical Radiation Processes in the Weizsacker-Williams Approximation, 2000, arXiv:physics/0003096 [physics.class-ph]

work page arXiv 2000
[71]

A. J. Baltz, Y. Gorbunov, S. R. Klein, and J. Nystrand, Two-Photon Interactions with Nuclear Breakup in Relativistic Heavy Ion Collisions, Phys. Rev. C80(2009) 044902, arXiv:0907.1214 [nucl-ex]. 34

work page arXiv 2009
[72]

The Monte Carlo Event Generator DPMJET-III,

S. Roesler, R. Engel, and J. Ranft, “The Monte Carlo Event Generator DPMJET-III,” International Conference on Advanced Monte Carlo for Radiation Physics, Particle Transport Simulation and Applications (MC 2000), 2001 1033, arXiv:hep-ph/0012252

work page arXiv 2000
[73]

Agostinelli et al.,Geant4– a simulation toolkit, Nucl

S. Agostinelli et al.,Geant4– a simulation toolkit, Nucl. Instrum. Meth. A506(2003) 250

2003
[74]

ATLAS Collaboration,The ATLAS Simulation Infrastructure, Eur. Phys. J. C70(2010) 823, arXiv:1005.4568 [physics.ins-det]

work page Pith review arXiv 2010
[75]

ATLAS Collaboration,Muon reconstruction and identification efficiency in ATLAS using the full Run 2𝑝 𝑝collision data set at√𝑠=13TeV, Eur. Phys. J. C81(2021) 578, arXiv:2012.00578 [hep-ex]

work page arXiv 2021
[76]

ATLAS Collaboration,Electron and photon performance measurements with the ATLAS detector using the 2015–2017 LHC proton–proton collision data, JINST14(2019) P12006, arXiv:1908.00005 [hep-ex]

work page arXiv 2015
[77]

ATLAS Collaboration,Measurement of light-by-light scattering and search for axion-like particles with2.2nb −1 of Pb+Pb data with the ATLAS detector, JHEP03(2021) 243, arXiv:2008.05355 [hep-ex], Erratum: JHEP11(2021) 050

work page arXiv 2021
[78]

Akesson et al.,ATLAS tracking event data model, (2006), url:https://cds.cern.ch/record/973401

F. Akesson et al.,ATLAS tracking event data model, (2006), url:https://cds.cern.ch/record/973401

2006
[79]

T. G. Cornelissen et al.,Updates of the ATLAS Tracking Event Data Model (Release 13), (2007), url:https://cds.cern.ch/record/1038095

work page arXiv 2007
[80]

ATLAS Collaboration, Early Inner Detector Tracking Performance in the 2015 Data at√𝑠=13TeV, ATL-PHYS-PUB-2015-051, 2015,url:https://cds.cern.ch/record/2110140

work page arXiv 2015

Showing first 80 references.