@article{Drnevich_2025,doi={10.1088/2632-2153/ae0def},url={https://doi.org/10.1088/2632-2153/ae0def},year={2025},month=oct,publisher={IOP Publishing},volume={6},number={4},pages={045023},author={Drnevich, Matthew and Jiggins, Stephen and Katzy, Judith and Cranmer, Kyle},title={Neural quasiprobabilistic likelihood ratio estimation with negatively weighted data},journal={Machine Learning: Science and Technology},}
@misc{drnevich2025quasiprobabilisticdensityratioestimation,title={Quasiprobabilistic Density Ratio Estimation with a Reverse Engineered Classification Loss Function},author={Drnevich, Matthew and Jiggins, Stephen and Cranmer, Kyle},year={2025},eprint={2512.19913},archiveprefix={arXiv},primaryclass={stat.ML},url={https://arxiv.org/abs/2512.19913},}
EPJP
Quantum information meets high-energy physics: input to the update of the European strategy for particle physics
Yoav Afik, Federica Fabbri, Matthew Low, and 68 more authors
@article{Afik2025,author={Afik, Yoav and Fabbri, Federica and Low, Matthew and Marzola, Luca and Aguilar-Saavedra, Juan Antonio and Altakach, Mohammad Mahdi and Asbah, Nedaa Alexandra and Bai, Yang and Banks, Hannah and Barr, Alan J. and Bernal, Alexander and Browder, Thomas E. and Caban, Pawe{\l} and Casas, J. Alberto and Cheng, Kun and D{\'e}liot, Fr{\'e}d{\'e}ric and Demina, Regina and Di Domenico, Antonio and Eckstein, Micha{\l} and Fabbrichesi, Marco and Fuks, Benjamin and Gabrielli, Emidio and Gon{\c{c}}alves, Dorival and Grabarczyk, Rados{\l}aw and Grossi, Michele and Han, Tao and Hobbs, Timothy J. and Horodecki, Pawe{\l} and Howarth, James and Hsu, Shih-Chieh and Jiggins, Stephen and Jones, Eleanor and Jung, Andreas W. and Knue, Andrea Helen and Korn, Steffen and Lagouri, Theodota and Lamba, Priyanka and Landi, Gabriel T. and Li, Haifeng and Li, Qiang and Low, Ian and Maltoni, Fabio and McFayden, Josh and McGinnis, Navin and Morales, Roberto A. and Moreno, Jes{\'u}s M. and de Nova, Juan Ramonoz and Negro, Giulia and Pagani, Davide and Pelliccioli, Giovanni and Pinamonti, Michele and Pintucci, Laura and Ravina, Baptiste and Ruzi, Alim and Sakurai, Kazuki and Simpson, Ethan and Sioli, Maximiliano and Su, Shufang and Trifinopoulos, Sokratis and Vahsen, Sven E. and Vallecorsa, Sofia and Vicini, Alessandro and Vos, Marcel and Vryonidou, Eleni and White, Chris D. and White, Martin J. and Wildridge, Andrew J. and Wu, Tong Arthur and Zani, Laura and Zhang, Yulei and Zoch, Knut},title={Quantum information meets high-energy physics: input to the update of the European strategy for particle physics},journal={The European Physical Journal Plus},year={2025},month=sep,day={09},volume={140},number={9},pages={855},issn={2190-5444},doi={10.1140/epjp/s13360-025-06752-9},url={https://doi.org/10.1140/epjp/s13360-025-06752-9},}
EPJC
Search for a new pseudoscalar decaying into a pair of bottom and antibottom quarks in top-associated production in }}\backslashsqrt{s}=13}} TeV proton–proton collisions with the ATLAS detector
@article{Aad2025NewPseudoScalar,author={ATLAS Collaboration},title={Search for a new pseudoscalar decaying into a pair of bottom and antibottom quarks in top-associated production in {\$}{\$}{\backslash}sqrt{\{}s{\}}=13{\$}{\$} TeV proton--proton collisions with the ATLAS detector},journal={The European Physical Journal C},year={2025},month=aug,day={19},volume={85},number={8},pages={886},issn={1434-6052},doi={10.1140/epjc/s10052-025-14507-0},url={https://doi.org/10.1140/epjc/s10052-025-14507-0},}
JHEP
Measurements of WH and ZH production with Higgs boson decays into bottom quarks and direct constraints on the charm Yukawa coupling in 13 TeV pp collisions with the ATLAS detector
A study of the Higgs boson decaying into bottom quarks (H \textrightarrow }} b\backslashoverline{b} }}) and charm quarks (H \textrightarrow }} c\backslashoverline{c} }}) is performed, in the associated production channel of the Higgs boson with a W or Z boson, using 140 fb−1 of proton-proton collision data at }} \backslashsqrt{s} }}= 13 TeV collected by the ATLAS detector. The individual production of WH and ZH with H \textrightarrow }} b\backslashoverline{b} }}is established with observed (expected) significances of 5.3 (5.5) and 4.9 (5.6) standard deviations, respectively. Differential cross-section measurements of the gauge boson transverse momentum within the simplified template cross-section framework are performed in a total of 13 kinematical fiducial regions.
@article{Aad2025_WHZH_2025,author={Collaboration, ATLAS},title={Measurements of WH and ZH production with Higgs boson decays into bottom quarks and direct constraints on the charm Yukawa coupling in 13 TeV pp collisions with the ATLAS detector},journal={Journal of High Energy Physics},year={2025},month=apr,day={10},volume={2025},number={4},pages={75},issn={1029-8479},doi={10.1007/JHEP04(2025)075},url={https://doi.org/10.1007/JHEP04(2025)075},}
EPJC
Measurement of the associated production of a top-antitop-quark pair and a Higgs boson decaying into a }}b\backslashbar{b}}}pair in pp collisions at }}\backslashsqrt{s}=13}} TeV using the ATLAS detector at the LHC
This paper reports the measurement of Higgs boson production in association with a }}t\backslashbar{t}}}pair in the }}H\backslashrightarrow b\backslashbar{b}}}decay channel. The analysis uses 140 fb}}^{-1}}}of 13 }}\backslashtext {TeV}}}proton–proton collision data collected with the ATLAS detector at the Large Hadron Collider. The final states with one or two electrons or muons are employed. An excess of events over the expected background is found with an observed (expected) significance of 4.6 (5.4) standard deviations. The }}t\backslashbar{t}H}}cross-section is }}\backslashsigma _{t\backslashbar{t}H} = 411~^{+101}_{-92}~\backslashtext {fb} = 411 \backslashpm 54(\backslashtext {stat.})~^{+85}_{-75}(\backslashtext {syst.})~\backslashtext {fb}}}for a Higgs boson mass of 125.09 }}\backslashtext {GeV}}}, consistent with the prediction of the Standard Model of }}507^{+35}_{-50}}}fb. The cross-section is also measured differentially in bins of the Higgs boson transverse momentum within the simplified template cross-section framework.
@article{Aad2025_ttH_2025,author={Collaboration, ATLAS},title={Measurement of the associated production of a top-antitop-quark pair and a Higgs boson decaying into a {\$}{\$}b{\backslash}bar{\{}b{\}}{\$}{\$}pair in pp collisions at {\$}{\$}{\backslash}sqrt{\{}s{\}}=13{\$}{\$} TeV using the ATLAS detector at the LHC},journal={The European Physical Journal C},year={2025},month=feb,day={24},volume={85},number={2},pages={210},issn={1434-6052},doi={10.1140/epjc/s10052-025-13740-x},url={https://doi.org/10.1140/epjc/s10052-025-13740-x},}
@misc{drnevich2024neuralquasiprobabilisticlikelihoodratio,title={Neural Quasiprobabilistic Likelihood Ratio Estimation with Negatively Weighted Data},author={Drnevich, Matthew and Jiggins, Stephen and Katzy, Judith and Cranmer, Kyle},year={2024},eprint={2410.10216},archiveprefix={arXiv},primaryclass={stat.ML},url={https://arxiv.org/abs/2410.10216},}
Search for a new leptonically decaying neutral vector boson in association with missing transverse energy in proton–proton collisions at \sqrts=13 TeV with the ATLAS detector
Feb 2023
All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2023-045
@techreport{ATLAS-CONF-2023-045,collaboration={ATLAS},title={{Search for a new leptonically decaying neutral vector
boson in association with missing transverse energy in
proton–proton collisions at $\sqrt{s}=13~$TeV with the
ATLAS detector}},institution={CERN},reportnumber={ATLAS-CONF-2023-045},address={Geneva},year={2023},url={https://cds.cern.ch/record/2870113},note={All figures including auxiliary figures are available at
https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2023-045},}
@techreport{ATL-PHYS-PUB-2022-055,collaboration={ATLAS},title={{Monte Carlo modelling of loop-induced $ZH$ production in
ATLAS}},institution={CERN},reportnumber={ATL-PHYS-PUB-2022-055},address={Geneva},year={2022},url={https://cds.cern.ch/record/2842239},note={All figures including auxiliary figures are available at
https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PUBNOTES/ATL-PHYS-PUB-2022-055},}
@article{Jiggins:2022ZT,author={Jiggins, Stephen},title={{Development of novel experimental techniques to improve the understanding of the Higgs sector by the ATLAS experiment}},doi={10.22323/1.414.0526},journal={PoS},year={2022},volume={ICHEP2022},pages={526},}
JHEP
Modelling and computational improvements to the simulation of single vector-boson plus jet processes for the ATLAS experiment
This paper presents updated Monte Carlo configurations used to model the production of single electroweak vector bosons (W, Z/γ∗) in association with jets in proton-proton collisions for the ATLAS experiment at the Large Hadron Collider. Improvements pertaining to the electroweak input scheme, parton-shower splitting kernels and scale-setting scheme are shown for multi-jet merged configurations accurate to next-to-leading order in the strong and electroweak couplings. The computational resources required for these set-ups are assessed, and approximations are introduced resulting in a factor three reduction of the per-event CPU time without affecting the physics modelling performance. Continuous statistical enhancement techniques are introduced by ATLAS in order to populate low cross-section regions of phase space and are shown to match or exceed the generated effective luminosity. This, together with the lower per-event CPU time, results in a 50% reduction in the required computing resources compared to a legacy set-up previously used by the ATLAS collaboration. The set-ups described in this paper will be used for future ATLAS analyses and lay the foundation for the next generation of Monte Carlo predictions for single vector-boson plus jets production.
@article{Aad2022,author={Collaboration, ATLAS},title={Modelling and computational improvements to the simulation of single vector-boson plus jet processes for the ATLAS experiment},journal={Journal of High Energy Physics},year={2022},month=aug,day={05},volume={2022},number={8},pages={89},issn={1029-8479},doi={10.1007/JHEP08(2022)089},url={https://doi.org/10.1007/JHEP08(2022)089},}
2021
EPJC
Measurements of WH and ZH production in the H →b \barb decay channel in pp collisions at \sqrts = 13 TeV with the ATLAS detector
Measurements of the Standard Model Higgs boson decaying into a }}b\backslashbar{b}}}pair and produced in association with a W or Z boson decaying into leptons, using proton–proton collision data collected between 2015 and 2018 by the ATLAS detector, are presented. The measurements use collisions produced by the Large Hadron Collider at a centre-of-mass energy of }}\backslashsqrt{s} = 13\backslash,\backslashtext {Te}\backslashtext {V}}}, corresponding to an integrated luminosity of }}139\backslash,\backslashmathrm {fb}^{-1}}}. The production of a Higgs boson in association with a W or Z boson is established with observed (expected) significances of 4.0 (4.1) and 5.3 (5.1) standard deviations, respectively. Cross-sections of associated production of a Higgs boson decaying into bottom quark pairs with an electroweak gauge boson, W or Z, decaying into leptons are measured as a function of the gauge boson transverse momentum in kinematic fiducial volumes. The cross-section measurements are all consistent with the Standard Model expectations, and the total uncertainties vary from 30% in the high gauge boson transverse momentum regions to 85% in the low regions. Limits are subsequently set on the parameters of an effective Lagrangian sensitive to modifications of the WH and ZH processes as well as the Higgs boson decay into }}b\backslashbar{b}}}.
@article{Aad2021,author={Collaboration, The ATLAS},title={Measurements of WH and ZH production in the $H \rightarrow b \bar{b}$
decay channel in pp collisions at $ \sqrt{s} = 13$~TeV with the ATLAS detector},journal={The European Physical Journal C},year={2021},month=feb,day={22},volume={81},number={2},pages={178},issn={1434-6052},doi={10.1140/epjc/s10052-020-08677-2},url={https://doi.org/10.1140/epjc/s10052-020-08677-2},}
PLB
Measurement of the associated production of a Higgs boson decaying into b-quarks with a vector boson at high transverse momentum in pp collisions at \sqrts=13 TeV with the ATLAS detector
The associated production of a Higgs boson with a W or Z boson decaying into leptons and where the Higgs boson decays to a bb¯ pair is measured in the high vector-boson transverse momentum regime, above 250 GeV, with the ATLAS detector. The analysed data, corresponding to an integrated luminosity of 139 fb−1, were collected in proton–proton collisions at the Large Hadron Collider between 2015 and 2018 at a centre-of-mass energy of s=13 TeV. The measured signal strength, defined as the ratio of the measured signal yield to that predicted by the Standard Model, is 0.72−0.36+0.39 corresponding to an observed (expected) significance of 2.1 (2.7) standard deviations. Cross-sections of associated production of a Higgs boson decaying into b quark pairs with a W or Z gauge boson, decaying into leptons, are measured in two exclusive vector boson transverse momentum regions, 250–400 GeV and above 400 GeV, and interpreted as constraints on anomalous couplings in the framework of a Standard Model effective field theory.
@article{2021136204,title={Measurement of the associated production of a Higgs boson decaying into
b-quarks with a vector boson at high transverse momentum in pp collisions at $\sqrt{s}=13$~TeV
with the ATLAS detector},journal={Physics Letters B},volume={816},pages={136204},year={2021},issn={0370-2693},doi={https://doi.org/10.1016/j.physletb.2021.136204},url={https://www.sciencedirect.com/science/article/pii/S0370269321001441},author={Collaboration, The ATLAS},}
2020
JHEP
Search for pairs of scalar leptoquarks decaying into quarks and electrons or muons in }} \backslashsqrt{s} }}= 13 TeV pp collisions with the ATLAS detector
A search for new-physics resonances decaying into a lepton and a jet performed by the ATLAS experiment is presented. Scalar leptoquarks pair-produced in pp collisions at }} \backslashsqrt{s} }}= 13 TeV at the Large Hadron Collider are considered using an integrated luminosity of 139 fb−1, corresponding to the full Run 2 dataset. They are searched for in events with two electrons or two muons and two or more jets, including jets identified as arising from the fragmentation of c- or b-quarks. The observed yield in each channel is consistent with the Standard Model background expectation. Leptoquarks with masses below 1.8 TeV and 1.7 TeV are excluded in the electron and muon channels, respectively, assuming a branching ratio into a charged lepton and a quark of 100%, with minimal dependence on the quark flavour. Upper limits on the aforementioned branching ratio are also given as a function of the leptoquark mass.
@article{Aad2020,author={Collaboration, ATLAS},title={Search for pairs of scalar leptoquarks decaying into quarks and electrons or muons in {\$}{\$} {\backslash}sqrt{\{}s{\}} {\$}{\$}= 13 TeV pp collisions with the ATLAS detector},journal={Journal of High Energy Physics},year={2020},month=oct,day={16},volume={2020},number={10},pages={112},issn={1029-8479},doi={10.1007/JHEP10(2020)112},url={https://doi.org/10.1007/JHEP10(2020)112},}
2019
JHEP
Measurement of VH, }} \backslashmathrm{H}\backslashto \backslashmathrm{b}\backslashoverline{\backslashmathrm{b}} }}production as a function of the vector-boson transverse momentum in 13 TeV pp collisions with the ATLAS detector
Cross-sections of associated production of a Higgs boson decaying into bottomquark pairs and an electroweak gauge boson, W or Z, decaying into leptons are measured as a function of the gauge boson transverse momentum. The measurements are performed in kinematic fiducial volumes defined in the ‘simplified template cross-section’ framework. The results are obtained using 79.8 fb−1 of proton-proton collisions recorded by the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 13 TeV. All measurements are found to be in agreement with the Standard Model predictions, and limits are set on the parameters of an effective Lagrangian sensitive to modifications of the Higgs boson couplings to the electroweak gauge bosons.
@article{Aaboud2019,author={Collaboration, ATLAS},title={Measurement of VH, {\$}{\$} {\backslash}mathrm{\{}H{\}}{\backslash}to {\backslash}mathrm{\{}b{\}}{\backslash}overline{\{}{\backslash}mathrm{\{}b{\}}{\}} {\$}{\$}production as a function of the vector-boson transverse momentum in 13 TeV pp collisions with the ATLAS detector},journal={Journal of High Energy Physics},year={2019},month=may,day={23},volume={2019},number={5},pages={141},issn={1029-8479},doi={10.1007/JHEP05(2019)141},url={https://doi.org/10.1007/JHEP05(2019)141},}
2018
PLB
Observation of H→\barbb decays and VH production with the ATLAS detector
@article{201859,title={Observation of $H\rightarrow \bar{b}b$ decays and VH production with the ATLAS detector},journal={Physics Letters B},volume={786},pages={59-86},year={2018},issn={0370-2693},doi={https://doi.org/10.1016/j.physletb.2018.09.013},url={https://www.sciencedirect.com/science/article/pii/S0370269318307056},author={Collaboration, ATLAS},}
JHEP
Search for heavy resonances decaying into a W or Z boson and a Higgs boson in final states with leptons and b-jets in 36 fb−1 of }} \backslashsqrt{s}=13 }}TeV pp collisions with the ATLAS detector
A search is conducted for new resonances decaying into a W or Z boson and a 125 GeV Higgs boson in the }} \backslashnu \backslashoverline{\backslashnu}b\backslashoverline{b} }}, }} {\backslashell}^{\backslashpm}\backslashnu b\backslashoverline{b} }}, and }} {\backslashell}^{+}{\backslashell}^{-}b\backslashoverline{b} }}final states, where ℓ\textpm = e\textpm or μ\textpm, in pp collisions at }} \backslashsqrt{s}=13 }}TeV. The data used correspond to a total integrated luminosity of 36.1 fb−1 collected with the ATLAS detector at the Large Hadron Collider during the 2015 and 2016 data-taking periods. The search is conducted by examining the reconstructed invariant or transverse mass distributions of W h and Zh candidates for evidence of a localised excess in the mass range of 220 GeV up to 5 TeV. No significant excess is observed and the results are interpreted in terms of constraints on the production cross-section times branching fraction of heavy W\textasciiacutex and Z\textasciiacutex resonances in heavy-vector-triplet models and the CP-odd scalar boson A in two-Higgs-doublet models. Upper limits are placed at the 95% confidence level and range between 9.0 \texttimes 10−4 pb and 7.3 \texttimes 10−1 pb depending on the model and mass of the resonance.
@article{Aaboud2018,author={Collaboration, ATLAS},title={Search for heavy resonances decaying into a W or Z boson and a Higgs boson in final states with leptons and b-jets in 36 fb−1 of {\$}{\$} {\backslash}sqrt{\{}s{\}}=13 {\$}{\$}TeV pp collisions with the ATLAS detector},journal={Journal of High Energy Physics},year={2018},month=mar,day={28},volume={2018},number={3},pages={174},issn={1029-8479},doi={10.1007/JHEP03(2018)174},url={https://doi.org/10.1007/JHEP03(2018)174},}
2017
PLB
Search for new resonances decaying to a W or Z boson and a Higgs boson in the ℓ+ℓ−bb¯, ℓνbb¯, and νν¯bb¯ channels with pp collisions at s=13 TeV with the ATLAS detector
@article{201732,title={Search for new resonances decaying to a W or Z boson and a Higgs boson in the ℓ+ℓ−bb¯, ℓνbb¯, and νν¯bb¯ channels with pp collisions at s=13 TeV with the ATLAS detector},journal={Physics Letters B},volume={765},pages={32-52},year={2017},issn={0370-2693},doi={https://doi.org/10.1016/j.physletb.2016.11.045},url={https://www.sciencedirect.com/science/article/pii/S0370269316307080},author={Collaboration, The ATLAS},}
JHEP
Measurement of b-hadron pair production with the ATLAS detector in proton-proton collisions at }} \backslashsqrt{s}=8 }}TeV
A measurement of b-hadron pair production is presented, based on a data set corresponding to an integrated luminosity of 11.4 fb−1 of proton-proton collisions recorded at }} \backslashsqrt{s}=8 }}TeV with the ATLAS detector at the LHC. Events are selected in which a b-hadron is reconstructed in a decay channel containing J/ψ\textrightarrow μμ, and a second b-hadron is reconstructed in a decay channel containing a muon. Results are presented in a fiducial volume defined by kinematic requirements on three muons based on those used in the analysis. The fiducial cross section is measured to be 17.7 \textpm 0.1(stat.) \textpm 2.0(syst.) nb. A number of normalised differential cross sections are also measured, and compared to predictions from the Pythia8, Herwig++, MadGraph5_aMC@NLO+Pythia8 and Sherpa event generators, providing new constraints on heavy flavour production.
@article{Aaboud2017,author={Collaboration, ATLAS},title={Measurement of b-hadron pair production with the ATLAS detector in proton-proton collisions at {\$}{\$} {\backslash}sqrt{\{}s{\}}=8 {\$}{\$}TeV},journal={Journal of High Energy Physics},year={2017},month=nov,day={10},volume={2017},number={11},pages={62},issn={1029-8479},doi={10.1007/JHEP11(2017)062},url={https://doi.org/10.1007/JHEP11(2017)062},}
@techreport{ATLAS-CONF-2016-015,title={{Search for a CP-odd Higgs boson decaying to Zh in pp
collisions at √s = 13 TeV with the ATLAS detector}},institution={CERN},reportnumber={ATLAS-CONF-2016-015},address={Geneva},year={2016},url={https://cds.cern.ch/record/2141003},note={All figures including auxiliary figures are available at
https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2016-015},}
2015
NIMA
Photon counting imaging with an electron-bombarded CCD: Towards wide-field time-correlated single photon counting (TCSPC)
Single photon detecting capabilities of an electron-bombarded CCD (EBCCD), where a photon is converted into a photoelectron that is accelerated through a high voltage before hitting the CCD chip, were characterised. The photon event pulse height distribution was found to be linearly dependent on the gain voltage. Based on these results, we propose that a gain voltage sweep during exposure in an EBCCD or EBCMOS camera would allow photon arrival time determination from the photon event pulse height with sub-frame exposure time resolution. This effectively uses an electron-bombarded sensor as a parallel-processing photoelectronic time-to-amplitude converter (TAC), or a 2-dimensional streak camera. Several applications that require timing of photon arrival, including fluorescence lifetime imaging microscopy (FLIM), may benefit from this approach. Moreover, the EBCCD was used on a fluorescence microscope to image fluorescently labelled cells in single photon counting mode.
@article{HIRVONEN2015323,title={Photon counting imaging with an electron-bombarded CCD: Towards wide-field time-correlated single photon counting (TCSPC)},journal={Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},volume={787},pages={323-327},year={2015},note={New Developments in Photodetection NDIP14},issn={0168-9002},doi={https://doi.org/10.1016/j.nima.2015.01.031},url={https://www.sciencedirect.com/science/article/pii/S0168900215000583},author={Hirvonen, Liisa M. and Jiggins, Stephen and Sergent, Nicolas and Zanda, Gianmarco and Suhling, Klaus},keywords={Fluorescence microscopy, Electron-bombarded CCD, Fluorescence lifetime imaging, Single photon counting},}