Haijun Yang

Director，Professor of Physics

Office: New Science Building 625

Telephone: 86-21-34202605

Email: Haijun.Yang@cern.ch, Haijun.Yang@sjtu.edu.cn

Address: 800 DongChuan Rd, Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China

Area of Physics: Experimental High Energy Physics

Research Interest: Collider Physics; Electroweak Physics; Neutrino Physics; Higgs, SUSY, Beyond Standard Model Physics; Dark Matter/Energy Search.

Professor Yang received his Ph.D. in Particle and Nuclear Physics in 2000 from Institute of High Energy Physics (IHEP), Chinese Academy of Sciences (CAS) through joint Ph.D. program with Swiss Federal Institute of Technology (ETH, Zurich). He performed his Ph.D thesis research in the L3 experiment on the Large Electron Positron Collider (LEP) at European Organization for Nuclear Research (CERN), Geneva, Switzerland. Since 2000, he was appointed as a Research Fellow position in Physics Department at the University of Michigan (UM), Ann Arbor. He was promoted to a Research Faculty position in 2005 and held this position until 2012, when he was appointed as a Professor of Physics at Shanghai Jiao Tong University (SJTU). 

Professor Yang was a member of CERN/LEP/L3 experiment (1997-2005) and Fermilab/MiniBooNE experiment (2003-2009, Principal Investigator of the U. Michigan group), currently is a member of ATLAS experiment at the Large Hadron Collider (LHC) at CERN (2005-). He is an expert on physics analysis and data processing at the collider experiments. He  is a member of the ATLAS collaboration who discovered the existence of the elusive Higgs boson on July 4, 2012, it is a cornerstone of particle physics and provides explanations for the origin of the symmetry-breaking mechanism by which elementary particles acquire mass. He plays an important role in the search for the Higgs boson through the “gold-plated” channel H->ZZ*->4l. The discovery of the Higgs boson at LHC was selected as the greatest discovery in 2012 by 《Science》magazine (AAAS). It provides the direct and cruical experimental evidence for the Nobel Prize in Physics in 2013.

Prof. Yang is a pioneer to develop and apply an advanced data mining technique Boosted Decision Trees (BDT) for particle identification and event pattern recognition since 2003. BDT is chosen as one of the standard tools by CERN TMVA package and has wide applications in particle physics including the discoveries of the Higgs bosons at CERN and the single top quark at Fermilab.

He served as a PI of the University of Michigan group for Fermilab/MiniBooNE experiment from 2005-2009. His research work on electron neutrino oscillation search using BDT with the MiniBooNE collaborators (PhysRevLett.98.231801) was selected as one of the top-10 physics stories by American Institute of Physics (AIP) in 2007.

He is an institute representative of SJTU team since 2012, and ATLAS USTC-SDU-SJTU-TDLI chinese cluster since 2016. He also serves as a member of ATLAS Collaboration Board Chair Advisory Group (CBCAG) in 2018-2019. What’s more, he also serves as steering committe of circular electron positron colider (CEPC) since 2013.

Selected Publications:

ATLAS Collab., “Observation of electroweak production of a same-sign W boson pair in association with two jets in pp collisions at 13 TeV with the ATLAS detector”, arXiv:1906.03203(submitted to PRL)

CALICE Collab.(Bing Liu, Imad Laktineh, Haijun Yang et.al.), “Hadron selection using Boosted Decision Trees in the semi-digitial hadronic calorimeter”, CALICE-CAN-2019-001

CEPC Working Group, “Precision HIggs Physics at CEPC”, arXiv:1810.09037, Chinese Physics C Vol.43, No.4 (2019) 043002

ATLAS Collab., “Search for lepton-flavor violation in different-flavor, high-mass final states in pp collisions at 13 TeV with the ATLAS detector”, arXiv:1807.06573, Phys. Rev. D 98 (2018) 092008

ATLAS Collab., “Search for heavy resonances decaying into a W/Z boson and a Higgs boson in final states with leptons and bjets in 36/fb of 13 TeV pp collisions with the ATLAS detector”, arXiv:1712.06518, JHEP 03 (2018) 174

ATLAS Collab., “Search for heavy ZZ resonances in the llll and llvv final states using proton proton collisions at 13 TeV with the ATLAS detector”, arXiv:1712.06386, Eur. Phys. J. C78 (2018) 293

ATLAS Collab., “Measurement of the Higgs boson coupling properties in the H->ZZ->4l decay channel at 13 TeV with the ATLAS detector”, arXiv:1712.02304, JHEP03 (2018) 095

ATLAS Collab., “Measurements of Higgs boson properties in the diphoton decay channel with 36/fb of pp collision datat 13 = TeV with the ATLAS detector”, arXiv:1802.04146, Phys. Rev. D 98, 052005 (2018)

ATLAS Collab., “Measurement of inclusive and differential cross sections in the H->ZZ->4l decay channel in pp collisions at 13 TeV with the ATLAS detector”, arXiv:1708.02810 JHEP 10 (2017)132

ATLAS Collaboration (M. Aaboud et.al.), “Search for new phenomena in different-flavour high-mass dilepton final states in pp collisions at 13 TeV with the ATLAS detector”, arXiv:1607.08079, Euro. Phys. J. C76 (2016)541

ATLAS Collaboration (M. Aaboud et.al.), “Search for resonances in diphoton events at 13 = TeV with the ATLAS detector”, 

arXiv:1606.03833, JHEP 09 (2016) 1

ATLAS Collab., “Search for new phenomena in different-flavour high-mass dilepton final states in pp collisions at 13 TeV with the ATLAS detector”, Euro. Phys. J. C76 (2016) 541.

ATLAS+CMS Collab., “Combined measurement of the Higs boson in pp collisions at 7 and 8 TeV with the ATLAS and CMS experiments”, Phys. Rev. Lett. 114, 191803 (2015) 

ATLAS Collab., “Measurement of four-lepton production at the Z resonance in pp collisions at 7 and 8 TeV with ATLAS, Phys. Rev. Lett. 112, 231806 (2014)

ATLAS Collab., Evidence for the spin-0 nature of the Higgs boson using ATLAS data, Phys. Lett. B726 (2013) 120-144

ATLAS Collab., Measurements of Higgs boson production and couplings in diboson final states with the ATLAS detector at the LHC, Phys. Lett. B726 (2013) 88-119

ATLAS Collab., A Particle Consistent with the Higgs Boson Observed with the ATLAS Detector at the Large Hadron Collider, Science 338, (2012) 1576-1582

ATLAS Collab., Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC,  Phys. Lett. B 716 (2012) 1-29

ATLAS Collab., Search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->4l with 4.8 fb-1 of pp collisions at √s =7 TeV with ATLAS,  Phys. Lett. B 710 (2012) 383-402

ATLAS Collab., Measurement of the ZZ production cross section and limits on anomalous neutral triple gauge couplings in proton-proton collisions at √s =7 TeV with the ATLAS detector, Phys. Rev. Lett. 108 (2012) 041804

ATLAS Collab., Measurement of the WW production cross section in proton-proton collisions at √s = 7 TeV with the ATLAS detector,  Phys. Rev. Lett. 107 (2011) 041802

ATLAS Collab., Measurement of the WZ Production Cross Section and Limits on Anomalous Triple Gauge Couplings in Proton-Proton Collisions at √s =7 TeV with the ATLAS Detector,  Phys. Lett. B709 (2012) 341-357

ATLAS Collab., Search for the Higgs boson in the H -> WW(*) -> l nu l nu decay channel in pp collisions at √s = 7 TeV with the ATLAS detector,  Phys. Rev. Lett. 108, 111802 (2012)

ATLAS Collab., Measurement of the W and Z production cross sections in proton-proton collisions at √s = 7 TeV with the ATLAS detector, JHEP 1012 (2010) 060

ATLAS Collab., Performance of the ATLAS Detector using First Collision Data, JHEP 1009 (2010) 056

ATLAS Collab., The ATLAS Experiment at the CERN Large Hadron Collider, JINST 3:S08003 (2008) 437 pp

H. Yang(*), T. Dai, A. Wilson, Z. Zhao, B. Zhou, A Multivariate Training Technique with Event Reweighting, JINST 3: P04004 (2008)

MiniBooNE Collab., Unexplained Excess of Electron-Like Events From a 1 GeV Neutrino Beam, Phys. Rev. Lett. 102, 101802 (2009)

MiniBooNE Collab., A Search for muon neutrino and antineutrino disappearance in MiniBooNE, Phys. Rev. Lett. 103, 061802 (2009)

MiniBooNE Collab., Measurement of Muon Neutrino Quasi-Elastic Scattering on Carbon, Phys. Rev. Lett. 100, 032301 (2008)

MiniBooNE Collab., First Observation of Coherent p0 Production in Neutrino Nucleus Interactions with En<2GeV,  Phys. Lett. B664:41-46 (2008)

MiniBooNE Collab., A.A. Aguilar-Arevalo et.al., A Search for Electron Neutrino Appearance at the Dm2 ~ 1 eV2 Scale, Phys. Rev. Lett. 98, 231801 (2007)

H. Yang(*), B.P. Roe, J. Zhu, Studies of Stability and Robustness for Artificial Neural Networks and Boosted Decision Trees, Nucl. Instrum. & Meth. A 574 (2007) 342-349

H. Yang(*), B.P. Roe, J. Zhu, Studies of boosted decision trees for MiniBooNE particle identification, Nucl. Instrum. & Meth. A 555 (2005) 370-385

B.P. Roe, H. Yang(*), J. Zhu et.al., Boosted decision trees as an alternative to artificial neural networks for particle identification, Nucl. Instrum. & Meth. A 543 (2005) 577-584

H. Yang(*), et.al., High-precision Absolute Distance Measurement using Dual-laser Frequency Scanned Interferometry Under Realistic Conditions, Nucl. Instrum. & Meth. A575 (2007) 395-401

H. Yang(*), J. Deibel, S. Nyberg, K. Riles, High precision absolute distance and vibration measurement using frequency scanned interferometry, Applied Optics, Vol.44 (2005) 3937-3944

LEP Collab., Search for the Standard Model Higgs Boson at LEP, Phys. Lett. B 565 (2003) 61-75

L3 Collab., Search for neutral Higgs bosons of the minimal supersymmetric standard model in e+e- interactions at √s up to 209 GeV, Phys. Lett. B545 (2002) 30-42

L3 Collab., Higgs Candidates in e+e- Interactions at √s = 206.6 GeV, Phys. Lett. B 495 (2000) 18-25

L3 Collab., Measurement of the topological branching fractions of the tau lepton at LEP, Phys. Lett. B 519 (2001) 189-198

L3 Collab., Production of single W bosons at √s=189 GeV and measurement of WWg gauge couplings, Phys. Lett. B 487 (2000) 229-240