Browsing Department of Physics and Technology by Subject "VDP::Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431"
Now showing items 41-60 of 557
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Charged-Higgs production in the Two-Higgs-doublet model — the τ ν channel
(Peer reviewed; Journal article, 2015-06-15)We update the allowed parameter space of the CP-violating 2HDM with Type II Yukawa couplings, that survives the current experimental and theoretical constraints on the model. For a representative set of allowed parameter ... -
Charged-particle multiplicity distributions over a wide pseudorapidity range in proton-proton collisions at √s = 0.9, 7, and 8 TeV
(Peer reviewed; Journal article, 2017-12-09)We present the charged-particle multiplicity distributions over a wide pseudorapidity range (−3.4<η<5.0 ) for pp collisions at √s=0.9,7 , and 8 TeV at the LHC. Results are based on information from the Silicon Pixel Detector ... -
Charged-particle production as a function of multiplicity and transverse spherocity in pp collisions at √s=5.02and 13 TeV
(Peer reviewed; Journal article, 2019-10-17)We present a study of the inclusive chargedparticle transverse momentum (pT) spectra as a function of charged-particle multiplicity density at mid-pseudorapidity, dNch/dη, in pp collisions at √s = 5.02 and 13 TeV covering ... -
Charged-particle pseudorapidity density at mid-rapidity in p–Pb collisions at √sNN = 8.16 TeV
(Peer reviewed; Journal article, 2019-04-04)The pseudorapidity density of charged particles, dNch/dη , in p–Pb collisions has been measured at a centre-of-mass energy per nucleon–nucleon pair of sNN−−−√ = 8.16 TeV at mid-pseudorapidity for non-single-diffractive ... -
Charged–particle multiplicities in proton–proton collisions at \(\sqrt{s}=\) 0.9 to 8 TeV, with ALICE at the LHC
(Peer reviewed; Journal article, 2017-01)The ALICE Collaboration has carried out a detailed study of pseudorapidity densities and multiplicity distributions of primary charged particles produced in proton-proton collisions, at \(\sqrt{s} =\) 0.9, 2.36, 2.76, 7 ... -
Charmonium and \(e^+e^-\) pair photoproduction at mid-rapidity in ultra-peripheral Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV
(Peer reviewed; Journal article, 2013-11)The ALICE Collaboration at the LHC has measured the \(J/\psi\) and \(\psi\)' photoproduction at mid-rapidity in ultra-peripheral Pb-Pb collisions at \(\sqrt{s_{NN}}\) = 2.76 TeV. The charmonium is identified via its leptonic ... -
Coherent \(\psi(2S)\) photo-production in ultra-peripheral Pb-Pb collisions at \(\sqrt{s_{\rm NN}}\)= 2.76 TeV
(Peer reviewed; Journal article, 2015-12)The ALICE Collaboration has performed the first measurement of the coherent \(\psi(2S)\) photo-production cross section in ultra-peripheral Pb-Pb collisions at the LHC. This charmonium excited state is reconstructed via ... -
Coherent \(\rho^0\) photoproduction in ultra-peripheral Pb-Pb collisions at \(\mathbf{\sqrt{\textit{s}_{\rm NN}}} = 2.76\) TeV
(Peer reviewed; Journal article, 2015-09)We report the first measurement at the LHC of coherent photoproduction of \(\rho^0\) mesons in ultra-peripheral Pb-Pb collisions. The invariant mass and transverse momentum distributions for \(\rho^0\) production are studied ... -
Coherent J/ψ photoproduction at forward rapidity in ultra-peripheral Pb–Pb collisions at √sNN = 5.02 TeV
(Peer reviewed; Journal article, 2019)The ALICE collaboration performed the first rapidity-differential measurement of coherent J/ψ photoproduction in ultra-peripheral Pb–Pb collisions at a center-of-mass energy √sNN = 5.02 TeV. The J/ψ is detected via its ... -
Combination of inclusive and differential tt¯ charge asymmetry measurements using ATLAS and CMS data at √s=7 and 8 TeV
(Peer reviewed; Journal article, 2018-04-09)This paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair (tt¯) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC ... -
Combination of searches for heavy resonances decaying into bosonic and leptonic final states using 36 fb−1 of proton-proton collision data at √s=13 TeV with the ATLAS detector
(Peer reviewed; Journal article, 2018-09-26)Searches for new heavy resonances decaying into different pairings of W, Z, or Higgs bosons, as well as directly into leptons, are presented using a data sample corresponding to 36.1 fb^−1 of pp collisions at √s = 13 TeV ... -
Combination of Searches for Invisible Higgs Boson Decays with the ATLAS Experiment
(Peer reviewed; Journal article, 2019)Dark matter particles, if sufficiently light, may be produced in decays of the Higgs boson. This Letter presents a statistical combination of searches for H → invisible decays where H is produced according to the standard ... -
Combinations of single-top-quark production cross-section measurements and |fLVVtb| determinations at √s = 7 and 8 TeV with the ATLAS and CMS experiments
(Peer reviewed; Journal article, 2019)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 s√ = 7 and 8 TeV corresponding to integrated ... -
Combined measurement of differential and total cross sections in the H → γγ and the H → ZZ⁎ → 4ℓ decay channels at √s = 13 TeV with the ATLAS detector
(Peer reviewed; Journal article, 2018-09-17)A combined measurement of differential and inclusive total cross sections of Higgs boson production is performed using 36.1 fb^−1 of 13 TeV proton–proton collision data produced by the LHC and recorded by the ATLAS detector ... -
Comparison of fragmentation functions for jets dominated by light quarks and gluons from pp and Pb+Pb collisions in ATLAS
(Peer reviewed; Journal article, 2019)Charged-particle fragmentation functions for jets azimuthally balanced by a high-transverse-momentum, prompt, isolated photon are measured in 25 pb − 1 of p p and 0.49 nb − 1 of Pb + Pb collision data at 5.02 TeV per nucleon ... -
Comprehensive measurements of \(t\)-channel single top-quark production cross sections at \(\sqrt{s} = 7\) TeV with the ATLAS detector
(Peer reviewed; Journal article, 2014-12-11)This article presents measurements of the \(t\).channel single top-quark \(t\) and top-antiquark \(\bar{t}\) total production cross sections \(\sigma(tq)\) and \(\sigma(\bar{t}q)\). their ratio \(R_{t}=\sigma(tq)/\si ... -
Constraining production models with light (anti-)nuclei measurements in small systems with ALICE at the LHC
(Peer reviewed; Journal article, 2019)The production of deuterons and anti-deuterons in pp collisions at √s = 7 and 13 TeV has been studied as a function of charged-particle multiplicity using the ALICE detector at the LHC. The preliminary results are shown ... -
Constraining the magnitude of the Chiral Magnetic Effect with Event Shape Engineering in Pb-Pb collisions at \(\sqrt{s_{\rm NN}}\) = 2.76 TeV
(Peer reviewed; Journal article, 2018-02)In ultrarelativistic heavy-ion collisions, the event-by-event variation of the elliptic flow \(v_2\) reflects fluctuations in the shape of the initial state of the system. This allows to select events with the same centrality ... -
Constraints on jet quenching in p–Pb collisions at √sNN = 5.02 TeV measured by the event-activity dependence of semi-inclusive hadron-jet distributions
(Peer reviewed; Journal article, 2018-08)The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high-transverse momentum trigger hadron in p–Pb collisions at √sNN = 5.02 TeV. Jets are reconstructed ... -
Constraints on mediator-based dark matter and scalar dark energy models using √s = 13 TeV pp collision data collected by the ATLAS detector
(Peer reviewed; Journal article, 2019)Constraints on selected mediator-based dark matter models and a scalar dark energy model using up to 37 fb−1s√ = 13 TeV pp collision data collected by the ATLAS detector at the LHC during 2015-2016 are summarised in this ...