CERN Accelerating science

CERN Document Server 2,051 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 16.70 δευτερόλεπτα. 
1.
Measurements of normalized differential cross-sections for tˉtt¯t production in pppp collisions at ss=7 TeV using the ATLAS detector / ATLAS Collaboration
Measurements of normalized differential cross-sections for top-quark pair production are presented as a~function of the top-quark transverse momentum, and of the mass, transverse momentum, and rapidity of the tˉtt¯t system, in proton--proton collisions at a~center-of-mass energy of ss = 7 TeV. The dataset corresponds to an integrated luminosity of 4.6 fb11, recorded in 2011 with the ATLAS detector at the CERN Large Hadron Collider. [...]
arXiv:1407.0371; CERN-PH-EP-2014-099; CERN-PH-EP-2014-099.- Geneva : CERN, 2014-10-13 - 42 p. - Published in : Phys. Rev. D 90 (2014) 072004 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint
2.
Flavour tagged time dependent angular analysis of the BsJ/ψϕBsJ/ψϕ decay and extraction of ΔΓΔΓ and the weak phase ϕsϕs in ATLAS / ATLAS Collaboration
A measurement of the BsJ/ψϕBsJ/ψϕ decay parameters, updated to include flavour tagging is reported using 4.9fb14.9fb1 of integrated luminosity collected by the ATLAS detector from s=7s=7TeV pppp collisions recorded in 2011 at the LHC. The values measured for the physical parameters are: ϕs=0.12±0.25(stat.)±0.05(syst.)radΔΓ=0.053±0.021(stat.)0.010(syst.)ps1Γs=0.677±0.007(stat.)±0.004(syst.)ps1|A(0)|2=0.220±0.008(stat.)±0.009(syst.)|A0(0)|2=0.529±0.006(stat.)±0.012(syst.)δ=3.89±0.47(stat.)±0.11(syst.)radϕs=0.12±0.25(stat.)±0.05(syst.)radΔΓ=0.053±0.021(stat.)0.010(syst.)ps1Γs=0.677±0.007(stat.)±0.004(syst.)ps1|A(0)|2=0.220±0.008(stat.)±0.009(syst.)|A0(0)|2=0.529±0.006(stat.)±0.012(syst.)δ=3.89±0.47(stat.)±0.11(syst.)rad where the parameter ΔΓΔΓ is constrained to be positive. [...]
arXiv:1407.1796; CERN-PH-EP-2014-043; CERN-PH-EP-2014-043.- Geneva : CERN, 2014-09-23 - 26 p. - Published in : Phys. Rev. D 90 (2014) 052007 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint
3.
Measurements of Higgs boson production and couplings in the four-lepton channel in pppp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector / ATLAS Collaboration
The final ATLAS Run 1 measurements of Higgs boson production and couplings in the decay channel HZZ++, where ,=e or μ, are presented. These measurements were performed using pp collision data corresponding to integrated luminosities of 4.5 fb1 and 20.3 fb1 at center-of-mass energies of 7 TeV and 8 TeV, respectively, recorded with the ATLAS detector at the LHC. [...]
arXiv:1408.5191; CERN-PH-EP-2014-170; CERN-PH-EP-2014-170.- Geneva : CERN, 2015-01-16 - 47 p. - Published in : Phys. Rev. D 91 (2015) 012006 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint
4.
Simultaneous measurements of the tˉt, W+W, and Z/γττ production cross-sections in pp collisions at s=7 TeV with the ATLAS detector / ATLAS Collaboration
Simultaneous measurements of the tˉt, W+W, and Z/γττ production cross-sections using an integrated luminosity of 4.6 fb1 of pp collisions at s=7 TeV collected by the ATLAS detector at the LHC are presented. Events are selected with two high transverse momentum leptons consisting of an oppositely charged electron and muon pair. [...]
arXiv:1407.0573; CERN-PH-EP-2014-119; CERN-PH-EP-2014-119.- Geneva : CERN, 2015-03-06 - 34 p. - Published in : Phys. Rev. D 91 (2015) 052005 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint
5.
Measurement of long-range pseudorapidity correlations and azimuthal harmonics in sNN=5.02 TeV proton-lead collisions with the ATLAS detector / ATLAS Collaboration
Measurements of two-particle correlation functions and the first five azimuthal harmonics, v1 to v5, are presented, using 28 nb1 of p+Pb collisions at a nucleon-nucleon center-of-mass energy of sNN=5.02 TeV measured with the ATLAS detector at the LHC. Significant long-range "ridge-like" correlations are observed for pairs with small relative azimuthal angle (|Δϕ|<π/3) and back-to-back pairs (|Δϕ|>2π/3) over the transverse momentum range 0.4<pT<12 GeV and in different intervals of event activity. [...]
arXiv:1409.1792; CERN-PH-EP-2014-201; CERN-PH-EP-2014-201.- Geneva : CERN, 2014-10-09 - 29 p. - Published in : Phys. Rev. C 90 (2014) 044906 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint
6.
Study of heavy-flavor quarks produced in association with top-quark pairs at s = 7 TeV using the ATLAS detector / ATLAS Collaboration
Using a sample of dilepton top-quark pair (tˉt) candidate events, a study is performed of the production of top-quark pairs together with heavy-flavor (HF) quarks, the sum of tˉt+b+X and tˉt+c+X, collectively referred to as tˉt + HF. The data set used corresponds to an integrated luminosity of 4.7  fb1 of proton-proton collisions at a center-of-mass energy of 7 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. [...]
arXiv:1304.6386; CERN-PH-EP-2013-030; CERN-PH-EP-2013-030.- Geneva : CERN, 2014-04-21 - 23 p. - Published in : Phys. Rev. D 89 (2014) 072012 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint
7.
Measurement of Higgs boson production in the diphoton decay channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector / ATLAS Collaboration
A measurement of the production processes of the recently discovered Higgs boson is performed in the two-photon final state using 5.4 fb1 of proton-proton collisions data at s=7 TeV and 20.3 fb1 at s=8 TeV collected by the ATLAS detector at the Large Hadron Collider. The number of observed Higgs boson decays to diphotons divided by the corresponding Standard Model prediction, called the signal strength, is found to be μ=1.17±0.27 at the value of the Higgs boson mass measured by ATLAS, mH = 125.4 GeV. [...]
arXiv:1408.7084; CERN-PH-EP-2014-198; CERN-PH-EP-2014-198.- Geneva : CERN, 2014-12-24 - 44 p. - Published in : Phys. Rev. D 90 (2014) 112015 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint
8.
Observation of an Excited B±c Meson State with the ATLAS Detector / ATLAS Collaboration
A search for excited states of the B±c meson is performed using 4.9 fb1 of 7 TeV and 19.2 fb1 of 8 TeV pp collision data collected by the ATLAS experiment at the LHC. A new state is observed through its hadronic transition to the ground state, with the latter detected in the decay B±cJ/ψπ±. [...]
arXiv:1407.1032; CERN-PH-EP-2014-137; CERN-PH-EP-2014-137.- Geneva : CERN, 2014-11-21 - 18 p. - Published in : Phys. Rev. Lett. 113 (2014) 212004 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint
9.
Measurement of the 4 Cross Section at the Z Resonance and Determination of the Branching Fraction of Z4 in pp Collisions at s = 7 and 8 TeV with ATLAS / ATLAS Collaboration
Measurements of four-lepton (4, =e,μ) production cross sections at the Z resonance in pp collisions at the LHC with the ATLAS detector are presented. For dilepton and four-lepton invariant mass region m+>5 GeV and 80<m4<100 GeV, the measured cross sections are 76±18 (stat) ±4 (syst) ±1.4 (lumi)  fb and 107±9 (stat) ±4 (syst) ±3.0 (lumi)  fb at s = 7 and 8 TeV, respectively. [...]
arXiv:1403.5657; CERN-PH-EP-2014-047; CERN-PH-EP-2014-047.- Geneva : CERN, 2014-06-13 - 18 p. - Published in : Phys. Rev. Lett. 112 (2014) 231806 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint
10.
Search for pair-produced third-generation squarks decaying via charm quarks or in compressed supersymmetric scenarios in pp collisions at s=8 TeV with the ATLAS detector / ATLAS Collaboration
Results of a search for supersymmetry via direct production of third-generation squarks are reported, using 20.3 fb1 of proton-proton collision data at s=8 TeV recorded by the ATLAS experiment at the LHC in 2012. Two different analysis strategies based on monojet-like and c-tagged event selections are carried out to optimize the sensitivity for direct top squark pair production in the decay channel to a charm quark and the lightest neutralino (˜t1c+˜χ01) across the top squark--neutralino mass parameter space. [...]
arXiv:1407.0608; CERN-PH-EP-2014-141; CERN-PH-EP-2014-141.- Geneva : CERN, 2014-09-24 - 36 p. - Published in : Phys. Rev. D 90 (2014) 052008 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint

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