Department of Physics


Doctor David Krofcheck

MSc, PhD (Ohio State)

krofcheck

Contact details
Building 303, Room 711
Phone: +64 9 373 7599 ext 88897
Email:  d.krofcheck@auckland.ac.nz

Research areas


  • Experimental high energy nuclear physics
  • Environmental radiation
 

Research summary


Experimental high energy nuclear physics

The University of Auckland is a member of Compact Muon Solenoid (CMS) experiment currently running at The Large Hadron Collider (LHC) at CERN, Geneva. The CMS detector is a collaboration involving 37 countries, over 150 institutes and over 2000 physicists from around the world. The CMS group will examine the dynamics of collisions between counter-rotating beams of protons (light ions), and counter-rotating beams of lead nuclei (heavy ions). Auckland's role is to help develop and perform tests of the Beam Radiation Monitoring detectors, and to work on data analysis of p-p and Pb-Pb reactions.

The nuclear physics aims of this experiment are two-fold: first, to test predictions made using Quantum ChromoDynamics (QCD), which is the modern theory of strong nuclear forces, and second, to gain detailed information on the equation-of-state which governs highly compressed nuclear matter. In this work, the nuclear equation-of-state can be studied by measuring a property of heavy nuclei nuclear reactions called the "momentum flow". An important QCD prediction is that if nuclear matter is substantially compressed beyond its normal density, or if a high enough energy density is achieved in a nuclear volume, then a Quark-Gluon Plasma (QGP) may be formed. In such a case, the momentum flow may be substantially altered from its normal flow pattern. Other properties of the possible QGP may be studied in detail using hard probes or heavy meson flow. Such high energy-density matter is believed to have existed in the initial few microseconds following the "Big Bang" origin of the universe.

Environmental radiation

Radiation is a natural part of our environment. I constructed a Compton suppressed, High-Purity Germanium (HPGe) gamma-ray detector system to measure the energy of characteristic "fingerprint" gamma-rays from natural radionuclides. The HPGe and a Compton Suppression detector sit inside a 2000-kg lead shield. This type of measurement provides information on radiation hazards, sand transport, and dating of soils. I also use the HPGe to measure the "fingerprint" gamma-rays produced by progeny of radon gas. Radon is a tasteless, colourless, and odourless gas emitted by the radioactive decay of natural uranium and thorium in the earth. The progeny 214-bismuth and 214-lead produce the gamma rays that permit us to deduce the amount of radon present in caves or buildings.

Journal-research articles


  • Chatrchyan, S., Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., ... Swanson, J. (2012). Search for New Physics in the Multijet and Missing Transverse Momentum Final State in Proton-Proton Collisions at root s=7 TeV. PHYSICAL REVIEW LETTERS, 109 (17). doi:10.1103/PhysRevLett.109.171803
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Fanelli, C. (2012). Search for dark matter and large extra dimensions in monojet events in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (9). doi:10.1007/JHEP09(2012)094
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Mermerkaya, H. (2012). Search for a W' or Techni-ρ decaying into WZ in pp collisions at √s=7TeV. Physical Review Letters, 109 (14). doi:10.1103/PhysRevLett.109.141801
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Milenovic, P. (2012). Observation of sequential Υ suppression in PbPb collisions. Physical Review Letters, 109 (22). doi:10.1103/PhysRevLett.109.222301
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Sibille, J. (2012). Search for supersymmetry in events with b-quark jets and missing transverse energy in pp collisions at 7 TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 86 (7). doi:10.1103/PhysRevD.86.072010
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Swanson, J. (2012). Measurement of the top-quark mass in {Mathematical expression} events with dilepton final states in pp collisions at {Mathematical expression}. European Physical Journal C, 72 (10), 1-21. doi:10.1140/epjc/s10052-012-2202-z
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Swanson, J. (2012). Search for a fermiophobic Higgs boson in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, (9). doi:10.1007/JHEP09(2012)111
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Swanson, J. (2012). Search for a light charged Higgs boson in top quark decays in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (7). doi:10.1007/JHEP07(2012)143
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Swanson, J. (2012). Search for heavy Majorana neutrinos in μ μ +jets and e e +jets events in pp collisions at s=7TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 717 (1-3), 109-128. doi:10.1016/j.physletb.2012.09.012
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Swanson, J. (2012). Search for pair production of first- and second-generation scalar leptoquarks in pp collisions at root s=7 TeV. PHYSICAL REVIEW D, 86 (5). doi:10.1103/PhysRevD.86.052013
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Swanson, J. (2012). Study of the inclusive production of charged pions, kaons, and protons in pp collisions at {Mathematical expression}. European Physical Journal C, 72 (10), 1-37. doi:10.1140/epjc/s10052-012-2164-1
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Aguilo, E., ... Venditti, R. (2012). Inclusive and differential measurements of the tt- charge asymmetry in proton-proton collisions at s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 717 (1-3), 129-150. doi:10.1016/j.physletb.2012.09.028
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Mermerkaya, H. (2012). Centrality dependence of dihadron correlations and azimuthal anisotropy harmonics in PbPb collisions at √SNN = 2.76 Tev. European Physical Journal C, 72 (5), 1-26. doi:10.1140/epjc/s10052-012-2012-3
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Mermerkaya, H. (2012). Forward energy flow, central charged-particle multiplicities, and pseudorapidity gaps in W and Z boson events from pp collisions at √s = 7 TeV. European Physical Journal C, 72 (1), 1-28. doi:10.1140/epjc/s10052-011-1839-3
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Mermerkaya, H. (2012). Jet production rates in association with W and Z bosons in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (1). doi:10.1007/JHEP01(2012)010
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Mermerkaya, H. (2012). Measurement of the rapidity and transverse momentum distributions of Z bosons in pp collisions at √(s)=7TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 85 (3). doi:10.1103/PhysRevD.85.032002
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Mermerkaya, H. (2012). Search for quark compositeness in dijet angular distributions from pp collisions at √s = 7 TeV The CMS collaboration. Journal of High Energy Physics, 2012 (5). doi:10.1007/JHEP05(2012)055
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Mermerkaya, H. (2012). Suppression of non-prompt J/ψ, prompt J/ψ, and Y(1S) in PbPb collisions at √s = 2.76 TeV. Journal of High Energy Physics, 2012 (5). doi:10.1007/JHEP05(2012)063
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Rizzi, A. (2012). Exclusive γγ → μμ production in proton-proton collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (1). doi:10.1007/JHEP01(2012)052
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Rovelli, C. (2012). Search for signatures of extra dimensions in the diphoton mass spectrum at the large hadron collider. Physical Review Letters, 108 (11). doi:10.1103/PhysRevLett.108.111801
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Rovelli, C. (2012). Search for the standard model Higgs boson in the decay channel H→ZZ→4l in pp collisions at √s=7TeV. Physical Review Letters, 108 (11). doi:10.1103/PhysRevLett.108.111804
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Sigamani, M. (2012). Observation of a new Ξ baryon. Physical Review Letters, 108 (25). doi:10.1103/PhysRevLett.108.252002
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Soffi, L. (2012). Inclusive b-jet production in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (4). doi:10.1007/JHEP04(2012)084
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Soffi, L. (2012). Search for neutral Higgs bosons decaying to tau pairs in pp collisions at s=7TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 713 (2), 68-90. doi:10.1016/j.physletb.2012.05.028
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Sphicas, P. (2012). Performance of τ-lepton reconstruction and identification in CMS. Journal of Instrumentation, 7 (1). doi:10.1088/1748-0221/7/01/P01001
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Squillacioti, P. (2012). Search for heavy long-lived charged particles in pp collisions at √s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 713 (4-5), 408-433. doi:10.1016/j.physletb.2012.06.023
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Azimuthal Anisotropy of Charged Particles at High Transverse Momenta in Pb-Pb Collisions at root S-NN=2.76 TeV. PHYSICAL REVIEW LETTERS, 109 (2). doi:10.1103/PhysRevLett.109.022301
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Centrality dependence of dihadron correlations and azimuthal anisotropy harmonics in PbPb collisions at {Mathematical expression}. European Physical Journal C, 72 (5), 1-26.
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Combined results of searches for the standard model Higgs boson in pp collisions at s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 710 (1), 26-48.
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Combined results of searches for the standard model Higgs boson in pp collisions at s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 710 (1), 26-48. doi:10.1016/j.physletb.2012.02.064
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Jet momentum dependence of jet quenching in PbPb collisions at sNN=2.76 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 712 (3), 176-197. doi:10.1016/j.physletb.2012.04.058
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of isolated photon production in pp and PbPb collisions at sNN=2.76 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 710 (2), 256-277.
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of isolated photon production in pp and PbPb collisions at sNN=2.76 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 710 (2), 256-277. doi:10.1016/j.physletb.2012.02.077
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of jet fragmentation into charged particles in pp and PbPb collisions at root s(NN)=2.76 TeV. JOURNAL OF HIGH ENERGY PHYSICS, (10). doi:10.1007/JHEP10(2012)087
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the Electron Charge Asymmetry in Inclusive W Production in pp Collisions at root s=7 TeV. PHYSICAL REVIEW LETTERS, 109 (11). doi:10.1103/PhysRevLett.109.111806
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the Pseudorapidity and Centrality Dependence of the Transverse Energy Density in Pb-Pb Collisions at root s(NN)=2.76 TeV. PHYSICAL REVIEW LETTERS, 109 (15). doi:10.1103/PhysRevLett.109.152303
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the Z/γ*+b-jet cross section in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (6). doi:10.1007/JHEP06(2012)126
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at √s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 709 (1-2), 28-49.
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at √s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 709 (1-2), 28-49. doi:10.1016/j.physletb.2012.01.078
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the cross section for production of bb̄X decaying to muons in pp collisions at √ s = 7 TeV. Journal of High Energy Physics, 2012 (6). doi:10.1007/JHEP06(2012)110
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the inclusive production cross sections for forward jets and for dijet events with one forward and one central jet in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (6). doi:10.1007/JHEP06(2012)036
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the mass difference between top and antitop quarks. Journal of High Energy Physics, 2012 (6). doi:10.1016/j.physletb.2012.05.063
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the t(t)over-bar production cross section in pp collisions at root s=7 TeV in dilepton final states containing a tau. PHYSICAL REVIEW D, 85 (11). doi:10.1103/PhysRevD.85.112007
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the underlying event activity in pp collisions at root s=0 9 and 7 TeV with the novel jet-area/median approach. JOURNAL OF HIGH ENERGY PHYSICS, (8). doi:10.1007/JHEP08(2012)130
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the underlying event in the Drell-Yan process in proton-proton collisions at root s=7 TeV. EUROPEAN PHYSICAL JOURNAL C, 72 (9). doi:10.1140/epjc/s10052-012-2080-4
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Measurement of the Λ b cross section and the Λ- b to Λ b ratio with J/ψΛ decays in pp collisions at s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 714 (2-5), 136-157. doi:10.1016/j.physletb.2012.05.063
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for B → μ μ And B0 → μ+ μ- Decays. Journal of High Energy Physics, 2012 (4). doi:10.1007/JHEP04(2012)033
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for B-S(0) -> mu(+)mu(-) and B-0 -> mu(+)mu(-) decays. JOURNAL OF HIGH ENERGY PHYSICS, (4). doi:10.1007/JHEP04(2012)033
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for Dark Matter and Large Extra Dimensions in pp Collisions Yielding a Photon and Missing Transverse Energy. PHYSICAL REVIEW LETTERS, 108 (26). doi:10.1103/PhysRevLett.108.261803
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for New Physics with Same-Sign Isolated Dilepton Events with Jets and Missing Transverse Energy. PHYSICAL REVIEW LETTERS, 109 (7). doi:10.1103/PhysRevLett.109.071803
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for a Higgs boson in the decay channel H → ZZ* → qqℓ-ℓ-+ in pp collisions at p√s = 7TeV. Journal of High Energy Physics, 2012 (4). doi:10.1007/JHEP04(2012)036
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for a Light Pseudoscalar Higgs Boson in the Dimuon Decay Channel in pp Collisions at root s=7 TeV. PHYSICAL REVIEW LETTERS, 109 (12). doi:10.1103/PhysRevLett.109.121801
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for anomalous production of multilepton events in pp collisions at √ s = 7 TeV. Journal of High Energy Physics, 2012 (6). doi:10.1007/JHEP06(2012)169
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state. JOURNAL OF HIGH ENERGY PHYSICS, (9). doi:10.1007/JHEP09(2012)029
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for charge-asymmetric production of W ' bosons in t(t)over-bar + jet events from pp collisions at root s=7 TeV. PHYSICS LETTERS B, 717 (4-5), 351-370. doi:10.1016/j.physletb.2012.09.048
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for heavy bottom-like quarks in 4.9 fb(-1) of pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, (5). doi:10.1007/JHEP05(2012)123
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for heavy, top-like quark pair production in the dilepton final state in pp collisions at. root s=7 TeV. PHYSICS LETTERS B, 716 (1), 103-121. doi:10.1016/j.physletb.2012.07.059
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for high-mass resonances decaying into tau-lepton pairs in pp collisions at root s=7 TeV. PHYSICS LETTERS B, 716 (1), 82-102. doi:10.1016/j.physletb.2012.07.062
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for large extra dimensions in dimuon and dielectron events in pp collisions at s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 711 (1), 15-34. doi:10.1016/j.physletb.2012.03.029
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for leptonic decays of W ' bosons in pp collisions at root s=7TeV. JOURNAL OF HIGH ENERGY PHYSICS, (8). doi:10.1007/JHEP08(2012)023
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for microscopic black holes in pp collisions at √ s = 7 TeV. Journal of High Energy Physics, 2012 (4). doi:10.1007/JHEP04(2012)061
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for narrow resonances in dilepton mass spectra in pp collisions at s=7TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 714 (2-5), 158-179. doi:10.1016/j.physletb.2012.06.051
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for new physics in events with same-sign dileptons and b-tagged jets in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, (8). doi:10.1007/JHEP08(2012)110
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for physics beyond the standard model in events with a Z boson, jets, and missing transverse energy in pp collisions at root s=7 TeV. PHYSICS LETTERS B, 716 (2), 260-284. doi:10.1016/j.physletb.2012.08.026
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for stopped long-lived particles produced in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, (8). doi:10.1007/JHEP08(2012)026
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for supersymmetry in hadronic final states using M-T2 in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, (10). doi:10.1007/JHEP10(2012)018
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for the standard model Higgs boson decaying into two photons in pp collisions at √s=7TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 710 (3), 403-425.
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for the standard model Higgs boson decaying into two photons in pp collisions at √s=7TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 710 (3), 403-425. doi:10.1016/j.physletb.2012.03.003
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for the standard model Higgs boson decaying to W +W - in the fully leptonic final state in pp collisions at s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 710 (1), 91-113.
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for the standard model Higgs boson decaying to W W in the fully leptonic final state in pp collisions at s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 710 (1), 91-113. doi:10.1016/j.physletb.2012.02.076
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for the standard model Higgs boson decaying to bottom quarks in pp collisions at s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 710 (2), 284-306.
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for the standard model Higgs boson decaying to bottom quarks in pp collisions at s=7 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 710 (2), 284-306. doi:10.1016/j.physletb.2012.02.085
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for the standard model Higgs boson in the H -> ZZ -> 2l2v channel in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, (3). doi:10.1007/JHEP03(2012)040
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Search for the standard model Higgs boson in the decay channel H→ZZ→4l in pp collisions at √s=7TeV. Physical Review Letters, 108 (11).
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Study of W boson production in PbPb and pp collisions at root s(NN)=2.76 TeV. PHYSICS LETTERS B, 715 (1-3), 66-87. doi:10.1016/j.physletb.2012.07.025
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Swanson, J. (2012). Study of high-p T charged particle suppression in PbPb compared to pp collisions at {Mathematical expression}. European Physical Journal C, 72 (3), 1-22.
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Tauscher, M. (2012). J/ψ and ψ (2S) production in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (2). doi:10.1007/JHEP02(2012)011
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Topakli, H. (2012). Inclusive search for squarks and gluinos in pp collisions at √s=7TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 85 (1). doi:10.1103/PhysRevD.85.012004
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). Exclusive γγ → +μμ - production in proton-proton collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (1).
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). Forward energy flow, central charged-particle multiplicities, and pseudorapidity gaps in W and Z boson events from pp collisions at √s = 7 TeV. European Physical Journal C, 72 (1), 1-28.
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). Inclusive search for squarks and gluinos in pp collisions at root s=7 TeV. PHYSICAL REVIEW D, 85 (1). doi:10.1103/PhysRevD.85.012004
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). J/psi and psi(2S) production in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, (2). doi:10.1007/JHEP02(2012)011
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). J/ψ and ψ (2S) production in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (2).
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). Jet production rates in association with W and Z bosons in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (1).
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). Measurement of the rapidity and transverse momentum distributions of Z bosons in pp collisions at root(s)=7 TeV. PHYSICAL REVIEW D, 85 (3). doi:10.1103/PhysRevD.85.032002
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). Performance of τ-lepton reconstruction and identification in CMS. Journal of Instrumentation, 7 (1).
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). Search for signatures of extra dimensions in the diphoton mass spectrum at the large hadron collider. Physical Review Letters, 108 (11).
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). Shape, transverse size, and charged-hadron multiplicity of jets in pp collisions at √s = 7 TeV. Journal of High Energy Physics, 2012 (6). doi:10.1007/JHEP06(2012)160
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., ... Weinberg, M. (2012). Suppression of non-prompt J/psi, prompt J/psi, and Upsilon(1S) in PbPb collisions at root s(NN)=2.76 TeV. JOURNAL OF HIGH ENERGY PHYSICS, (5). doi:10.1007/JHEP05(2012)063
  • Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Ciulli, V., Adam, W., ... Fanelli, C. (2012). Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 716 (1), 30-61. doi:10.1016/j.physletb.2012.08.021
  • Chatrchyan, S., Khachatryan, V., Sirunyan, M. A., Tumasyan, A., Adam, W., Bergauer, T., ... Mermerkaya, H. (2012). Search for the standard model Higgs boson in the H → ZZ → l l τ τ decay channel in pp collisions at □s = 7 TeV. Journal of High Energy Physics, 2012 (3). doi:10.1007/JHEP03(2012)081

Book chapters


  • KROFCHECK, D. ''Signatures for AdS/CFT using the CMS experiment at the LHC”, 14th Lomonosov Conference on Elementary Particle Physics, Moscow, Russia, 19 August - 25 August 2009, Editor: Studenikin, A., PARTICLE PHYSICS AT THE YEAR OF ASTRONOMY. (World Scientific, Singapore). p.57-59. (2010).