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1.

001-es BibID:BIBFORM123155
035-os BibID:(WOS)000417342900001 (Scopus)84984649244
Első szerző:ATLAS Collaboration
Cím:Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC pp collision data at root{s} = 7 and 8 TeV / ATLAS Collaboration, CMS Collaboration
Dátum:2016
ISSN:1126-6708 1029-8479
Megjegyzések:Combined ATLAS and CMS measurements of the Higgs boson production and decay rates, as well as constraints on its couplings to vector bosons and fermions, are presented. The combination is based on the analysis of five production processes, namely gluon fusion, vector boson fusion, and associated production with a W or a Z boson or a pair of top quarks, and of the six decay modes H -> ZZ; WW, gamma gamma; tau tau; bb, and mu mu. All results are reported assuming a value of 125: 09 GeV for the Higgs boson mass, the result of the combined measurement by the ATLAS and CMS experiments. The analysis uses the CERN LHC proton-proton collision data recorded by the ATLAS and CMS experiments in 2011 and 2012, corresponding to integrated luminosities per experiment of approximately 5 fb(-1) at root s = 7TeV and 20 fb(-1) at root s = 8TeV. The Higgs boson production and decay rates measured by the two experiments are combined within the context of three generic parameterisations: two based on cross sections and branching fractions, and one on ratios of coupling modifiers. Several interpretations of the measurements with more model-dependent parameterisations are also given. The combined signal yield relative to the Standard Model prediction is measured to be 1.09 +/- 0.11. The combined measurements lead to observed significances for the vector boson fusion production process and for the H -> tau tau decay of 5.4 and 5.5 standard deviations, respectively. The data are consistent with the Standard Model predictions for all parameterisations considered.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Hadron-Hadron scattering (experiments)
Higgs physics
Megjelenés:Journal of High Energy Physics. - 2016 : 8 (2016), p. 1-111. -
További szerzők:Karancsi János (1987-) (fizikus) Bartók Márton (fizikus) Makovec Alajos (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus) CMS Collaboration
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2.

001-es BibID:BIBFORM121929
035-os BibID:(WoS)000562898300001 (Scopus)85090035581
Első szerző:ATLAS Collaboration
Cím:Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at root{s} = 8 TeV / ATLAS Collaboration, CMS Collaboration
Dátum:2020
ISSN:1126-6708 1029-8479
Megjegyzések:The combination of measurements of the W boson polarization in top quark decays performed by the ATLAS and CMS collaborations is presented. The measurements are based on proton-proton collision data produced at the LHC at a centre-of-mass energy of 8 TeV, and corresponding to an integrated luminosity of about 20 fb(-1)for each experiment. The measurements used events containing one lepton and having different jet multiplicities in the final state. The results are quoted as fractions of W bosons with longitudinal (F-0), left-handed (F-L), or right-handed (F-R) polarizations. The resulting combined measurements of the polarization fractions are F-0= 0.693 +/- 0.014 and F-L= 0.315 +/- 0.011. The fractionF(R)is calculated from the unitarity constraint to be F-R=-0.008 +/- 0.007. These results are in agreement with the standard model predictions at next-to-next-to-leading order in perturbative quantum chromodynamics and represent an improvement in precision of 25 (29)% for F-0(F-L) with respect to the most precise single measurement. A limit on anomalous right-handed vector (V-R), and left- and right-handed tensor (g(L), g(R)) tWb couplings is set while fixing all others to their standard model values. The allowed regions are [-0.11,0.16] for V-R, [-0.08,0.05] for g(L), and [-0.04,0.02] for g(R), at 95% confidence level. Limits on the corresponding Wilson coefficients are also derived.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Hadron-Hadron scattering (experiments)
Top physics
Megjelenés:Journal of High Energy Physics. - 2020 : 8 (2020), p. 1-66. -
További szerzők:Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Teyssier, Daniel Francois Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus) CMS Collaboration
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3.

001-es BibID:BIBFORM121462
035-os BibID:(WoS)001058564200001 (Scopus)85174479199
Első szerző:ATLAS Collaboration
Cím:Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at root{s} = 7 and 8 TeV / ATLAS Collaboration, CMS Collaboration
Dátum:2023
ISSN:1126-6708 1029-8479
Megjegyzések:A combination of measurements of the inclusive top-quark pair production cross-section performed by ATLAS and CMS in proton-proton collisions at centre-of-mass energies of 7 and 8TeV at the LHC is presented. The cross-sections are obtained using top-quark pair decays with an opposite-charge electron-muon pair in the final state and with data corresponding to an integrated luminosity of about 5 fb(-1) at root s = 7 TeV and about 20 fb(-1) at root s = 8TeV for each experiment. The combined cross-sections are determined to be 178.5 +/- 4.7 pb at root s = 7 TeV and 243.3(-5.9)(+6.0) pb at root s = 8TeV with a correlation of 0.41, using a reference top-quark mass value of 172.5 GeV. The ratio of the combined crosssections is determined to be R-8/7 = 1.363 +/- 0.032. The combined measured cross-sections and their ratio agree well with theory calculations using several parton distribution function (PDF) sets. The values of the top-quark pole mass (with the strong coupling fixed at 0.118) and the strong coupling (with the top-quark pole mass fixed at 172.5 GeV) are extracted from the combined results by fitting a next-to-next-to-leading-order plus next-to-next-to-leading-log QCD prediction to the measurements. Using a version of the NNPDF3.1 PDF set containing no top-quark measurements, the results obtained are m(t)(pole) = 173.4(-2.0)(+1.8) GeV and alpha s(m(Z)) = 0.1170(-0.0018)(+0.0021).
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Hadron-Hadron Scattering
Top Physics
Megjelenés:Journal of High Energy Physics. - 2023 : 7 (2023), p. 1-64. -
További szerzők:Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus) CMS Collaboration
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4.

001-es BibID:BIBFORM121753
035-os BibID:(WoS)000432038500001 (Scopus)85048748130
Első szerző:ATLAS Collaboration
Cím:Combination of inclusive and differential tt charge asymmetry measurements using ATLAS and CMS data at root{s} = 7 and 8 TeV / ATLAS Collaboration, CMS Collaboration
Dátum:2018
ISSN:1126-6708 1029-8479
Megjegyzések:This paper presents combinations of inclusive and differential measurements of the charge asymmetry (A(C)) in top quark pair (t(t)over-bar) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. The data correspond to integrated luminosities of about 5 and 20 fb(-1) for each experiment, respectively. The resulting combined LHC measurements of the inclusive charge asymmetry are A(C)(LHC7) = 0.005 +/- 0.007 (stat) +/- 0.006 (syst) at 7 TeV and A(C)(LHC8) = 0.0055 +/- 0.0023 (stat) +/- 0.0025 (syst) at 8 TeV. These values, as well as the combination of A(C) measurements as a function of the invariant mass of the t(t)over-bar system at 8 TeV, are consistent with the respective standard model predictions.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Hadron-Hadron scattering (experiments)
Top physics
Megjelenés:Journal of High Energy Physics. - 2018 : 4 (2018), p. 1-68. -
További szerzők:Karancsi János (1987-) (fizikus) Bartók Márton (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus) CMS Collaboration
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5.

001-es BibID:BIBFORM119073
035-os BibID:(Scopus)85066067505 (WOS)000468428300001
Első szerző:ATLAS Collaboration
Cím:Combinations of single-top-quark production cross-section measurements and |f(LV)V(tb)| determinations at root{s} = 7 and 8 TeV with the ATLAS and CMS experiments / ATLAS and CMS Collaborations
Dátum:2019
ISSN:1126-6708 1029-8479
Megjegyzések:This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at = 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb(-1) at = 7 TeV and 12.2 to 20.3 fb(-1) at = 8 TeV. These combinations are performed per centre-of-mass energy and for each production mode: t-channel, tW, and s-channel. The combined t-channel cross-sections are 67.5 +/- 5.7 pb and 87.7 +/- 5.8 pb at = 7 and 8 TeV respectively. The combined tW cross-sections are 16.3 +/- 4.1 pb and 23.1 +/- 3.6 pb at = 7 and 8 TeV respectively. For the s-channel cross-section, the combination yields 4.9 +/- 1.4 pb at = 8 TeV. The square of the magnitude of the CKM matrix element V-tb multiplied by a form factor f(LV) is determined for each production mode and centre-of-mass energy, using the ratio of the measured cross-section to its theoretical prediction. It is assumed that the top-quark-related CKM matrix elements obey the relation |V-td|, |V-ts| << |V-tb|. All the |f(LV)V(tb)|(2) determinations, extracted from individual ratios at = 7 and 8 TeV, are combined, resulting in |f(LV)V(tb)| = 1.02 +/- 0.04 (meas.) +/- 0.02 (theo.). All combined measurements are consistent with their corresponding Standard Model predictions.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Hadron-Hadron scattering (experiments)
Megjelenés:Journal of High Energy Physics. - 2019 : 5 (2019), p. 1-81. -
További szerzők:Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus) CMS Collaboration
Pályázati támogatás:NKFIA 123842
Egyéb
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6.

001-es BibID:BIBFORM124015
035-os BibID:(Scopus)84943751990 (WoS)000362594900001
Első szerző:CMS Collaboration
Cím:Search for neutral color-octet weak-triplet scalar particles in proton-proton collisions at root{s} = 8 TeV / The CMS collaboration
Dátum:2015
ISSN:1126-6708 1029-8479
Megjegyzések:A search for pair production of neutral color-octet weak-triplet scalar particles (Theta(0)) is performed in processes where one Theta(0) decays to a pair of b quark jets and the other to a Z boson plus a jet, with the Z boson decaying to a pair of electrons or muons. The search is performed with data collected by the CMS experiment at the CERN LHC corresponding to an integrated luminosity of 19.7 fb(-1) of proton-proton collisions at root s = 8TeV. The number of observed events is found to be in agreement with the standard model predictions. The 95% confidence level upper limit on the product of the cross section and branching fraction is obtained as a function of the Theta(0) mass. The 95% confidence level lower bounds on the Theta(0) mass are found to be 623 and 426 GeV, for two different octo-triplet theoretical scenarios. These are the first direct experimental bounds on particles predicted by the octo-triplet model.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Exotics
Hadron-Hadron Scattering
Megjelenés:Journal of High Energy Physics. - 2015 : 9 (2015), p. 1-36. -
További szerzők:Karancsi János (1987-) (fizikus) Bartók Márton (fizikus) Makovec Alajos (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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Borító:

7.

001-es BibID:BIBFORM124007
035-os BibID:(Scopus)84921407514 (WoS)000348053800001
Első szerző:CMS Collaboration
Cím:Erratum: Search for new physics in events with same-sign dileptons and jets in pp collisions at root{s} = 8 TeV / The CMS collaboration
Dátum:2015
ISSN:1126-6708 1029-8479
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal of High Energy Physics. - 2015 : 1 (2015), p. 1-18. -
További szerzők:Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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Borító:

8.

001-es BibID:BIBFORM124006
035-os BibID:(Scopus)84942573284 (WoS)000363541800002
Első szerző:CMS Collaboration
Cím:Measurement of the underlying event activity using charged-particle jets in proton-proton collisions at root{s} = 2.76 TeV / The CMS collaboration
Dátum:2015
ISSN:1126-6708 1029-8479
Megjegyzések:A measurement of the underlying event (UE) activity in proton-proton collisions is performed using events with charged-particle jets produced in the central pseudorapidity region (vertical bar eta(jet) | < 2) and with transverse momentum 1 <= p(T)(jet) < 100 GeV. The analysis uses a data sample collected at a centre-of-mass energy of 2.76TeV with the CMS experiment at the LHC. The UE activity is measured as a function of p(T)(jet) T in terms of the average multiplicity and scalar sum of transverse momenta (p(T)) of charged particles, with vertical bar eta vertical bar < 2 and p(T) > 0.5 GeV, in the azimuthal region transverse to the highest p(T) jet direction. By further dividing the transverse region into two regions of smaller and larger activity, various components of the UE activity are separated. The measurements are compared to previous results at 0.9 and 7TeV, and to predictions of several Monte Carlo event generators, providing constraints on the modelling of the UE dynamics.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Hadron-Hadron Scattering
Particle correlations and fluctuations
Megjelenés:Journal of High Energy Physics. - 2015 : 9 (2015), p. 1-32. -
További szerzők:Karancsi János (1987-) (fizikus) Bartók Márton (fizikus) Makovec Alajos (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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9.

001-es BibID:BIBFORM123983
035-os BibID:(Scopus)84949478621 (WoS)000366140300001
Első szerző:CMS Collaboration
Cím:Search for supersymmetry in the vector-boson fusion topology in proton-proton collisions at root{s} = 8 TeV / The CMS collaboration
Dátum:2015
ISSN:1126-6708 1029-8479
Megjegyzések:The first search for supersymmetry in the vector-boson fusion topology is presented. The search targets final states with at least two leptons, large missing transverse momentum, and two jets with a large separation in rapidity. The data sample corresponds to an integrated luminosity of 19.7 fb(-1) of proton-proton collisions at root s = 8TeV collected with the CMS detector at the CERN LHC. The observed dijet invariant mass spectrum is found to be consistent with the expected standard model prediction. Upper limits are set on the cross sections for chargino and neutralino production with two associated jets, assuming the supersymmetric partner of the tau lepton to be the lightest slepton and the lightest slepton to be lighter than the charginos. For a so-called compressed-mass-spectrum scenario in which the mass difference between the lightest supersymmetric particle (chi) over bar (0)(1) and the next lightest, mass-degenerate, gaugino particles (chi) over bar (0)(2) and (chi) over bar (+/-)(1) is 50 GeV, a mass lower limit of 170 GeV is set for these latter two particles.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Hadron-Hadron Scattering
Supersymmetry
Megjelenés:Journal of High Energy Physics. - 2015 : 11 (2015), p. 1-41. -
További szerzők:Karancsi János (1987-) (fizikus) Bartók Márton (fizikus) Makovec Alajos (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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10.

001-es BibID:BIBFORM123979
035-os BibID:(Scopus)84921417485 (WoS)000363461700001
Első szerző:CMS Collaboration
Cím:Measurement of the ratio of the production cross sections times branching fractions of B+-/c --> J/[psi][pi]+- and B+- --> J/[psi]K+- and B(B+-/c --> J/[psi][pi]+-[pi]+-[pi]-+)/B(B+-/c --> J/[psi][pi]+-) in pp collisions at root{s} = 7 TeV / The CMS collaboration
Dátum:2015
ISSN:1126-6708 1029-8479
Megjegyzések:The ratio of the production cross sections times branching fractions (sigma(B-c(+/-))B(B-c(+/-) -> J/psi pi(+/-)))/(sigma(B-+/-)B(B-+/- -> J/psi K-+/-)) is studied in proton-proton collisions at a center-of-mass energy of 7TeV with the CMS detector at the LHC. The kinematic region investigated requires B-c(+/-) and B-+/- mesons with transverse momentum p(T) > 15 GeV and rapidity vertical bar y vertical bar < 1.6. The data sample corresponds to an integrated luminosity of 5.1 fb(-1). The ratio is determined to be [0.48 +/- 0.05 (stat) +/- 0.03 (syst) +/- 0.05 (tau(Bc))]%. The B-c(+/-) -> J/psi pi(+/-)pi(+/-)pi(-/+) decay is also observed in the same data sample. Using a model-independent method developed to measure the efficiency given the presence of resonant behaviour in the three-pion system, the ratio of the branching fractions B-c(+/-) -> J/psi pi(+/-)pi(+/-)pi(-/+)/B(B-c(+/-) -> J/psi pi(+/-)) is measured to be 2.55 +/- 0.80 (stat) +/- 0.33 (syst)(-0.01)(+0.04) (tau(Bc)), consistent with the previous LHCb result.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
B physics
Branching fraction
Hadron-Hadron Scattering
Megjelenés:Journal of High Energy Physics. - 2015 : 1 (2015), p. 1-29. -
További szerzők:Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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Borító:

11.

001-es BibID:BIBFORM123978
035-os BibID:(Scopus)84928895253 (WoS)000353818600001
Első szerző:CMS Collaboration
Cím:Measurement of the Z[gamma] production cross section in pp collisions at 8 TeV and search for anomalous triple gauge boson couplings / The CMS collaboration
Dátum:2015
ISSN:1126-6708 1029-8479
Megjegyzések:The cross section for the production of Z gamma in proton-proton collisions at 8 TeV is measured based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 19.5 fb(-1). Events with an oppositely-charged pair of muons or electrons together with an isolated photon are selected. The differential cross section as a function of the photon transverse momentum is measured inclusively and exclusively, where the exclusive selection applies a veto on central jets. The observed cross sections are compatible with the expectations of next-to-next-to-leading-order quantum chromodynamics. Limits on anomalous triple gauge couplings of ZZ gamma and Z gamma gamma are set that improve on previous experimental results obtained with the charged lepton decay modes of the Z boson.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Hadron-Hadron Scattering
Megjelenés:Journal of High Energy Physics. - 2015 : 4 (2015), p. 1-39. -
További szerzők:Karancsi János (1987-) (fizikus) Makovec Alajos (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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12.

001-es BibID:BIBFORM123968
035-os BibID:(Scopus)84924667085 (WoS)000351363800005
Első szerző:CMS Collaboration
Cím:Study of Z production in PbPb and pp collisions at root{s_NN} = 2.76 TeV in the dimuon and dielectron decay channels / The CMS collaboration
Dátum:2015
ISSN:1126-6708 1029-8479
Megjegyzések:The production of Z bosons is studied in the dimuon and dielectron decay channels in PbPb and pp collisions at root s(NN) = 2.76TeV, using data collected by the CMS experiment at the LHC. The PbPb data sample corresponds to an integrated luminosity of about 166 mu b(-1), while the pp data sample collected in 2013 at the same nucleon-nucleon centre-of-mass energy has an integrated luminosity of 5.4 pb(-1). The Z boson yield is measured as a function of rapidity, transverse momentum, and collision centrality. The ratio of PbPb to pp yields, scaled by the number of inelastic nucleon-nucleon collisions, is found to be 1.06 +/- 0.05 (stat) +/- 0.08 (syst) in the dimuon channel and 1.02 +/- 0.08 (stat) +/- 0.15 (syst) in the dielectron channel, for centrality-integrated Z boson production. This binary collision scaling is seen to hold in the entire kinematic region studied, as expected for a colourless probe that is unaffected by the hot and dense QCD medium produced in heavy ion collisions.
Tárgyszavak:Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Heavy Ions
Heavy-ion collision
Particle and resonance production
proton-proton scattering
Megjelenés:Journal of High Energy Physics. - 2015 : 3 (2015), p. 1-39. -
További szerzők:Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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