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Accueil > Le LPNHE > Pages du personnel permanent > Malaescu Bogdan

Malaescu Bogdan

par Bogdan MALAESCU - 14 décembre 2023

Family Name : MALAESCU

First Name : Bogdan

Email : malaescu in2p3.fr

ORCID : 0000-0002-8813-3830

Activity : ATLAS

Address : Laboratoire de Physique Nucléaire et des Hautes Énergies (LPNHE), Barre 12/22,
4 place Jussieu,75005 Paris cedex 05
Tél. +33 (0)1 44 27 91 30

PROFESSIONAL EXPERIENCE

  • Since October 2016 : CR1 at CNRS (staff) - that became CR CN in the structure in place since September 2017
  • March 2018 – February 2019 : Scientific Associate with CERN
  • October 2012 – September 2016 : CR2 at CNRS (staff)
  • October 2010 – September 2012 : fellow in the ATLAS group at CERN
  • Major Collaborations
    • Since 2010 : member of the ATLAS collaboration
    • 2007 – 2014 : member of the BABAR collaboration
  • Main responsibilities in the ATLAS experiment
    • April 2020 – March 2022 : convener of the Statistics Committee
    • Since December 2019 : member of the Statistics Committee
    • October 2019 - September 2021 : convener of the LHC EW Working Group (part of the LPCC), on behalf of ATLAS
    • October 2017 – September 2019 : convener of the « Standard Model » group
    • October 2014 – September 2016 : convener of the « Statistics Forum »
    • April 2014 – March 2015 : convener of the « Jets & photons » sub-group
    • October 2012 – September 2013 : convener of the « Jet energy scale and jet energy resolution » sub-group
  • Funded projects
    • Since 2022 : LPNHE representative and team coordinator for the ANR PRC project « Hadronic vacuum polarization and the search for new physics » (HVP4NewPhys)
    • 2022 : Supervisor for the « CoMPLEx » project prepared with Anja BUTTER, accepted for funding through the Marie Skłodowska-Curie Actions (MSCA) ; funding not used as Anja obtained a CNRS CR position
    • Since 2021 : Coordinator of the ANR JCJC project « The Lund Jet Plane for Precision Physics » (LEAP-physics)
    • Since 2021 : Participant to the ANR PRC project « Search for Dark Matter with Long-Lived Particles at the LHC » (DMwithLLPatLHC)
    • Since 2021 : Participant to the SMARTHEP network (EU funding approved in 2021)
    • Since 2019 : member of the COFECUB Ph909/18 project on machine learning applications for high energy physics
    • May 2015 – June 2016 : Co-coordinator of the project “Jets and photons with the ATLAS detector : performance and physics”, for the call “Argentine 2015” (Sorbonne Paris Cité)
  • Since September 2023 : coordinator of the Data-driven HVP subgroup of the Muon g-2 Theory Initiative

EDUCATION

  • 2006-2007 : Master « Concepts Fondamentaux de la Physique », Option of Theoretical Physics – ENS Paris, Ecole Polytechnique, Univesity Paris 6 and University Paris 11, ENS Cachan – France, degree obtained with mention « Good »
  • 2003-2007 : Engineer studies at Ecole Polytechnique, Paris, France – obtained engineer and master degree
  • 2001-2003 : Computer science studies at Polytechnic University of Bucharest, Romania

MAIN ARTICLES (with important personal contributions)

  • « Tensions in e+e−→π+π−(γ) measurements : the new landscape of data-driven hadronic vacuum polarization predictions for the muon g−2 », M. Davier et al., arXiv:2312.02053.
  • « Event-by-event Comparison between Machine-Learning- and Transfer-Matrix-based Unfolding Methods », M. Backes et al., arXiv:2310.17037.
  • « Study of additional radiation in the initial-state-radiation processes e+e− → μ+μ−γ and e+e− → π+π−γ in the BABAR experiment », the BaBar Collaboration, arXiv:2308.05233.
  • « Hadronic vacuum polarization : comparing lattice QCD and data-driven results in systematically improvable ways », M. Davier et al., arXiv:2308.04221.
  • « Uncertainty components in profile likelihood fits », A. Pinto et al., arXiv:2307.04007.
  • « New techniques for jet calibration with the ATLAS detector », The ATLAS Collaboration, Eur.Phys.J.C 83 (2023) 8, 761, arXiv:2303.17312.
  • « The Euclidean Adler Function and its Interplay with ∆α_QED^had and αs », M. Davier et al., JHEP 04 (2023) 067, arXiv:2302.01359.
  • « 50 Years of Quantum Chromodynamics », F. Gross et al., arXiv:2212.11107.
  • « An unfolding method based on conditional Invertible Neural Networks (cINN) using iterative training », M. Backes et al., arXiv:2212.08674.
  • « The two-photon decay of X(6900) from light-by-light scattering at the LHC », V. Biloshytskyi et al., Phys.Rev.D 106 (2022) 11, L111902, arXiv:2207.13623.
  • Snowmass 2021 whitepapers :
    • « Prospects for precise predictions of aμ in the Standard Model » arXiv:2203.15810.
    • « Proton structure at the precision frontier » arXiv:2203.13923, Contribution : « Delivery of PDFs ; PDF ensemble correlations in critical applications ».
    • « The strong coupling constant : State of the art and the decade ahead » arXiv:2203.08271, Contribution : "Energy range for the RGE test and PDF sensitivity in αS evaluations from jet cross section ratios ».
    • « Machine Learning and LHC Event Generation » arXiv:2203.07460.
  • « Determination of the parton distribution functions of the proton using diverse ATLAS data from pp collisions at √s = 7, 8 and 13 TeV », the ATLAS Collaboration, Eur.Phys.J.C 82 (2022) 5, 438, arXiv:2112.11266.
  • « Precision QCD Physics at the LHC », Thomas Gehrmann and Bogdan Malaescu, Ann.Rev.Nucl.Part.Sci. 72 (2022) 233-258, arXiv:2111.02319.
  • « Presenting Unbinned Differential Cross Section Results », M. Arratia et al., JINST 17 (2022) 01, P01024, arXiv:2109.13243.
  • « Impact of correlations between aμ and αQED on the EW fit », Bogdan Malaescu and Matthias Schott, Eur.Phys.J.C 81 (2021) 1, 46, arXiv:2008.08107.
  • « Jet energy scale and resolution measured in proton–proton collisions at √s = 13 TeV with the ATLAS detector », the ATLAS Collaboration, Eur.Phys.J.C 81 (2021) 8, 689, arXiv:2007.02645.
  • « The anomalous magnetic moment of the muon in the Standard Model », the Muon g-2 Theory Initiative, Phys.Rept. 887 (2020) 1-166, arXiv:2006.04822.
  • « Determination of jet calibration and energy resolution in proton-proton collisions at √s = 8 TeV using the ATLAS detector », the ATLAS Collaboration, Eur.Phys.J.C 80 (2020) 12, 1104, arXiv:1910.04482.
  • « A new evaluation of the hadronic vacuum polarisation contributions to the muon anomalous magnetic moment and to alpha(mZ) », M. Davier et al., Eur.Phys.J.C 80 (2020) 3, 241, arXiv:1908.00921.
  • « In situ calibration of large-R jet energy and mass in 13 TeV proton-proton collisions with the ATLAS detector », the ATLAS Collaboration, Eur.Phys.J. C79 (2019) no.2, 135, arxiv:1807.09477.
  • « Search for low-mass dijet resonances using trigger-level jets with the ATLAS detector in pp collisions at √s=13 TeV », the ATLAS Collaboration, Phys.Rev.Lett. 121 (2018) no.8, 081801, arxiv:1804.03496.
  • « Measurement of inclusive jet and dijet cross-sections in proton-proton collisions at √s=13 TeV with the ATLAS detector », the ATLAS Collaboration, JHEP 1805 (2018) 195, arxiv:1711.02692.
  • « Reevaluation of the hadronic vacuum polarisation contributions to the Standard Model predictions of the muon g-2 and alpha(mZ) using newest hadronic cross-section data », M. Davier et al., Eur.Phys.J. C77 (2017) no.12, 827, arXiv:1706.09436.
  • « Measurement of the inclusive jet cross-sections in proton-proton collisions at √s=8 TeV with the ATLAS detector », the ATLAS Collaboration, JHEP 09 (2017) 020, arxiv:1706.03192.
  • « Jet energy scale measurements and their systematic uncertainties in proton-proton collisions at √s=13 TeV with the ATLAS detector », the ATLAS Collaboration, Phys. Rev. D 96 (2017) 072002, arXiv:1703.09665.
  • « Search for new phenomena in dijet events using 37 fb^-1 of pp collision data collected at √s=13 TeV with the ATLAS detector », the ATLAS Collaboration, Phys. Rev. D 96 (2017) 052004, arXiv:1703.09127.
  • « Measurement of the inclusive jet cross-section in proton-proton collisions at √s=7 TeV using 4.5 fb^-1 of data with the ATLAS detector », the ATLAS Collaboration, JHEP 1502 (2015) 153, arXiv:1410.8857.
  • « Jet energy measurement and its systematic uncertainty in proton-proton collisions at √s=7TeV with the ATLAS detector », the ATLAS collaboration, Eur. Phys. J. C (2015) 75:17, arXiv:1406.0076.
  • « Measurement of dijet cross sections in pp collisions at 7 TeV centre-of-mass energy using the ATLAS detector », the ATLAS collaboration, JHEP 1405 (2014) 059, arXiv:1312.3524.
  • « Update of the ALEPH non-strange spectral functions from hadronic tau decays », M. Davier et al., Eur.Phys.J. C74 (2014) 2803, arXiv:1312.1501.
  • « Comments on « An Update of the HLS Estimate of the Muon g-2 » by M.Benayoun et al., arXiv:1210.7184v3 », M. Davier and B. Malaescu, Eur. Phys. J. C (2013) 73 : 2597, arXiv:1306.6374.
  • « Precision Measurement of the e+ e- —> K+ K- (gamma) Cross Section with the Initial-State Radiation Method at BaBar », the BABAR collaboration, Phys. Rev. D 88 (2013) 032013, arXiv:1306.3600.
  • « Measurement of the inclusive jet cross section in pp collisions at sqrt(s)=2.76 TeV and comparison to the inclusive jet cross section at sqrt(s)=7 TeV using the ATLAS detector », the ATLAS collaboration, Eur. Phys. J C 73 (2013) 2509, arXiv:1304.4739.
  • « Precise Measurement of the e+ e- —> pi+ pi- (gamma) Cross Section with the Initial-State Radiation Method at BABAR », the BABAR collaboration, Phys. Rev. D 86 (2012) 032013, arXiv:1205.2228.
  • « Evaluation of the Strong Coupling Constant alpha_s Using the ATLAS Inclusive Jet Cross-Section Data », B. Malaescu and P. Starovoitov, Eur.Phys.J. C72 (2012) 2041, arXiv:1203.5416.
  • « Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV », the ATLAS collaboration, Eur. Phys. J. C 73 (2013) 2304, arXiv:1112.6426.
  • « Measurement of inclusive jet and dijet production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector », the ATLAS collaboration, Phys. Rev. D 86 (2012) 014022, arXiv:1112.6297.
  • « Reevaluation of the Hadronic Contributions to the Muon g-2 and to alpha(MZ) », M. Davier et al., Eur.Phys.J.C71:1515,2011, arXiv:1010.4180.
  • « A note on renormalon models for the determination of alpha_s(M_tau) », S. Descotes-Genon and B. Malaescu, arXiv:1002.2968.
  • « Reevaluation of the hadronic contribution to the muon magnetic anomaly using new e+ e- ---> pi+ pi- cross section data from BABAR », M.Davier et al., Eur.Phys.J.C66:1-9,2010, arXiv:0908.4300.
  • « Precise measurement of the e+ e- ---> pi+ pi- (gamma) cross section with the Initial State Radiation method at BABAR », the BABAR collaboration, Phys.Rev.Lett.103:231801,2009, arXiv:0908.3589.
  • « An Iterative, dynamically stabilized method of data unfolding », B. Malaescu, arXiv:0907.3791.
  • « The Discrepancy Between tau and e+e- Spectral Functions Revisited and the Consequences for the Muon Magnetic Anomaly », M. Davier et al., Eur.Phys.J.C66:127-136,2010, arXiv:0906.5443.
  • « The Determination of alpha_s from Tau Decays Revisited », M. Davier et al., Eur.Phys.J.C56:305-322,2008, arXiv:0803.0979.

My full list of publications can be found here.

BOOK

  • 2014-2015 : “Hadron Contribution to Vacuum Polarization” chapter (M. Davier et al.) part of the book “The Standard Theory of Particle Physics”, edited by Luciano Maiani and Gigi Rolandi, in the series “Essays in the 60th Anniversary of CERN”, World Scientific Publishing

INTERNATIONAL CONFERENCES, INVITED SEMINARS AND WORKSHOPS : talks, organisation, session convenership

  • March 2022 : chair of the « g-2 session » at Moriond QCD.
  • November 2021 : Member of the program committee and chair of one session at the Strong 2020 Virtual Workshop on « Spacelike and Timeline determination of the Hadronic Leading Order contribution to the Muon g-2 » (Mini-Proceedings).
  • April 2013 : convener of the « QCD and Hadronic Final State » session at the conference DIS2013, Marseille ; plenary talk summarizing the experimental talks of the session, PoS DIS2013 (2013) 020.

Other attended conferences and workshops : Lattice2023 (August 2023) ; First Lund Jet Plane Institute (July 2023) ; Systematic Effects and Nuisance Parameters in Particle Physics Data Analyses (April 2023) ; Precision calculations for future e+e– colliders : targets and tools (June 2022) ; FCC Week 2022 (May 2022) ; « Dealing with uncertainties workshop » and « Learning to discover conference » (April 2022) ; Energy frontier workshop (March 2022) ; LHC EWWG general meeting (February 2022) ; 3rd FCC-France Workshop (December 2021) ; PHYSTAT-Systematics 2021 (November 2021) ; Virtual workshop on the « Theoretical evaluation of the muon g-2 » (FCCP 2021) (September 2021) ; ML4Jets2021 (July 2021) ; Muon g-2 theory initiative workshop (June/July 2021) ; Atelier « Technologies quantiques des deux infinis » (QT2I) (June 2021) ; Physique ATLAS France SM & Top (June 2021) ; Physics at TeV Colliders 2021 (« PhysTeV ») workshop (Les Houches) (June 2021) ; LHCP (June 2021) ; GDR-QCD/QCD@short distances and STRONG2020/PARTONS/FTE@LHC/NLOAccess (Online, IJClab, June 2021) ; Breakfast with g-2 : Tackling muon g-2 : theoretical efforts and latest results (Online, IJClab, May 2021) ; SM@LHC (Online, April 2021) ; GDR QCD general meeting (France, Online, March 2021) ; Unveiling hidden BSM @ LHC workshop (CERN, Online, March 2021) ; FCC November week 2020 and 4th FCC Physics and Experiments workshop (CERN, Online, November 2021) ; PHYSTAT-Flavour 2020 (CERN, Online, October 2020) ; FCC France Workshop (LPNHE, Online, May 2020) ; FCC workshop 2019 (Paris, France) ; Moriond 2019 (la Thuile, Italy) ; ICHEP 2010 (Paris, France)

SEMINARS AND PUBLIC MEETINGS : talks and organisation

TEACHING AND SUPERVISION EXPERIENCE

  • Since March 2023 : collaboration with Léonard POLAT, PostDoc funded through the HVP4NewPhys ANR project, working mainly on measurements of the e+e− → π+π−γ cross-section using BABAR data and the HVP contribution to the muon g-2, LPNHE and IJCLab, CNRS, France
  • Since July 2022 : collaboration with Lata PANWAR, PostDoc funded through the LEAP-physics ANR project, working mainly on jet substructure studies for ATLAS and FCC-ee, and on the jet energy calibration for ATLAS data, LPNHE, CNRS, France
  • November 2013 – October 2016 : collaboration with Dimitris VAROUCHAS, PostDoc working mainly on the differential ttbar cross-section measurement and on the jet energy calibration and resolution, LPNHE, CNRS, France
  • Since October 2022 : co-supervisor of Laura BOGGIA, PhD student working on applications of interpretable machine leaning techniques for jet performance and anomaly detection studies
  • Since October 2022 : co-supervisor of Line DELAGRANGE, PhD student working on the jet energy calibration and resolution, as well as on the extraction of alpha_S from jet cross-sections, at ATLAS and FCC-ee
  • October 2020 – September 2023 : co-supervisor of Louis GINABAT, PhD student working on the jet energy calibration and on the measurement of jet production cross-sections
  • October 2016 – September 2019 : co-supervisor of Robert HANKACHE, PhD student working on the jet energy calibration and resolution, the measurement jet cross-sections and searches of New Physics using jets, CERN-THESIS-2019-193, LPNHE, France
  • October 2012 – September 2014 : co-supervisor of Guillaume LEFEBVRE, PhD student working on the jet energy calibration and resolution, and the measurement of the ttbar cross-section, CERN-THESIS-2014-234, LPNHE, CNRS, France
  • March-July 2022 – co-supervisor for the internship of Line DELAGRANGE, Master 2 student on the in-situ jet energy calibration using the eta-intercalibration method, LPNHE, CNRS, France
  • November-December 2021 : Co-supervisor of the mini-internship NPAC of Line DELAGRANGE and Marie HARTMANN, on the calorimetry at FCC-ee
  • August-September 2021 : Co-supervision of Oscar TOVEY GARCIA, CERN summer student, on CI limits using inclusive jet measurements
  • March-June 2021 : co-supervisor for the internship of Sukyung KIM, Master 2 student on the extraction of alpha_S using di-jet and three-jet events at FCC-ee ; LPNHE, CNRS, France
  • March-June 2020 – supervisor for the internship of Louis GINABAT, Master 2 student on the absolute in-situ jet energy calibration using the eta-intercalibration method, LPNHE, CNRS, France
  • March – June 2016 : supervisor for the internship of Robert HANKACHE, Master 2 student, working on the in-situ jet energy calibration, LPNHE, CNRS, France
  • March – June 2015 : supervisor for the internship of Mathis CARISTAN, Master 2 student, working on the fiducial ttbar cross-section measurement, LPNHE, CNRS, France
  • April-June 2013 : supervisor for the internship of Oleh KIVERNYK, Master 2 student, working on the energy calibration and the measurement of the energy resolution of jets, LPNHE, CNRS, France
  • 2011 and 2012 : main supervisor for two CERN summer student projects : « Binning optimization for unfolded data spectra and applications for the inclusive jet cross section »
  • 2007-2010 : teaching assistant for second year students at University Paris 11

INVITED SCIENTIFIC COLLABORATORS

  • July-August 2022 : invited PostDoc A. Rodriguez to LPNHE, work on precision QCD studies with low energy e+e- data.
  • July-October 2022 : invited student D. Diaz Calderon to LPNHE, work on precision QCD studies with low energy e+e- data.
  • October 2016 : invited student F. Daneri to LPNHE, for 1 week, work on the jet calibration, supported by a Sorbonne Paris Cité funding.
  • October 2015 : invited scientist P. Loch to LPNHE, for 1 month, work on new methods of jet calibration, supported by a Lagrange funding.
  • October 2015 : invited student G. Marceca to LPNHE, for 3 weeks, work on the jet calibration and cross section measurements, supported by a Sorbonne Paris Cité funding.

SCIENTIFIC STAYS IN FOREIGN LABORATORIES

  • December 2022 : stay at the Federal University of Rio de Janeiro, for 10 days, work on Machine Learning applications for high energy physics with Jose Manoel Seixas and Yara do Amaral Coutinho, supported by a COFECUB funding ; talk at the ATLAS Brazil workshop (« On Jet Performance and Physics Studies in ATLAS »)
  • November 2017 – February 2020 : long term stay at CERN, mainly in the context of the ATLAS Standard Model convenership work
  • January 2016 : stay at the University of Buenos Aires, for 2.5 weeks, work on the jet calibration and the jet cross section measurements with R. Piegaia and his students J. Bossio and G. Marceca, supported by an EPLANET funding.

ORGANISATION OF SCIENTIFIC MEETINGS

  • April 2020 - March 2022 : Organized monthly ATLAS Statistics Forum meetings and bi-weekly ATLAS Statistics Committee meetings, as part of the convenership of the « Statistics Committee »
  • October 2017 – September 2019 : Organized weekly ATLAS meetings as part of the convenership of the « Standard Model » group
  • 2018 : Co-organizer of a workshop on the ATLAS forward physics program, a workshop on the studies done using low-mu data collected with ATLAS, two workshops on the effective field theory studies using ATLAS data (CERN) and an ATLAS Standard Model workshop (London, UK)
  • 2017 : Co-organizer of two workshops on ATLAS data reinterpretation (CERN)
  • October 2014 – September 2016 : Organized monthly ATLAS meetings as part of the convenership of the « Statistics Forum »
  • April 2014 – March 2015 : Organized weekly ATLAS meetings as part of the convenership of the sub-group « Jets & photons »
  • 2014 : Representative of the ATLAS LPNHE group for organizing the Physics ATLAS France workshop in November 2014, and chair of the SM/Top session
  • October 2012 – September 2013 : Organized weekly ATLAS meetings as part of the convenership of the sub-group « Jet energy scale and jet energy resolution »
  • 2014-2015 : As co-convener of the sub-group « Jets & photons », contributed to the organization of the ATLAS Standard Model workshop, Annecy, France
  • 2013 : As co-convener of the sub-group « Jet energy scale and jet energy resolution », contributed to the organization of the ATLAS « Hadronic calibration workshop », Chicago, USA
  • 2011 – 2014 : Co-organizer and contributor to three ATLAS workshops on unfolding, CERN

COMMISSIONS OF TRUST

  • April 2022 : Member of the ATLAS committee for the appointment of the physics groups conveners
  • Referee of the QCD section of PDG (2021)
  • Since 2020 : Referee for the Progress in Particle and Nuclear Physics journal ; referee for the JHEP ; referee for the Computing and Software for Big Science journal
  • Since 2019 : Referee for the NPJ Quantum Information
  • Since 2016 : Referee for the PRD journal ; referee for the NIM A journal
  • Since 2014 : Referee for the JINST journal
  • Since 2012 : Referee for the European Physics Journal C
  • Since 2011 : Member of several editorial boards for ATLAS publications ; author of numerous ATLAS paper reviews, one of them being performed on behalf of the ATLAS Spokesperson (2021)
  • Since 2023 : Member of the PhD committees for a thesis prepared at LPNHE and for a thesis prepared at LPSC, France
  • 2020-2022 : Member of the PhD committee for a thesis prepared at LPNHE, France
  • 2023 : Pre-examiner of Laura Martikainen’s PhD manuscript (Helsinki Institute of Physics)
  • September 2023 : Member of the examining committee for the PhD thesis of Louis GINABAT (LPNHE), France
  • September 2019 : Member of the examining committee for the PhD thesis of Robert HANKACHE (LPNHE), France
  • November 2016 : Member of the committee in charge of recruiting a postdoc in the LHCb group at LPNHE
  • September 2014 : Member of the examining committee for the PhD thesis of Guillaume LEFEBVRE (LPNHE), France
  • September 2013 : Member of the examining committee for the PhD thesis of Nicolas MERIC (CEA, LPTHE, LPNHE), France

OUTREACH ACTIVITIES

  • October 2022 : Meeting with a group of high-school students during the “Celebration of science” event at LPNHE
  • November 2018 : Participant to a round-table on the theme of research, in the presence of the Romanian President Klaus Iohannis and of Gerard Mourou (Paris)
  • November 2018 : Participant to a round-table on the theme of research, in the presence of the Romanian Minister of Research (CERN)
  • March 2018 : Guide for a visit of French Parliament Representatives at the ATLAS control room (CERN)
  • October 2015 and 2016 : Guide for groups of students visiting the exhibition organized during the “Celebration of science” event at LPNHE
  • January 2015 : Speaker at an interactive meeting at Ecole Polytechnique (Palaiseau, France), aiming at explaining the activity of a researcher for one series of 500 students

PRIZES AND DISTINCTIONS

  • 2015 : Obtained the « PhD supervision and research bonus » from CNRS, for a duration of 4 years, for “exceptional contributions to research”
  • 1996-2001 : Numerous prizes and distinctions at national (Romanian) and international physics competitions
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