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2014-02-12
01:14
Search for Higgs boson decays to a photon and a Z boson in pp collisions at $\sqrt{s}$ = 7 and 8 TeV with the ATLAS detector / ATLAS Collaboration
A search is reported for a neutral Higgs boson in the decay channel $H → Z\gamma, Z → l^+ l^- (l = e,µ)$, using 4.5 fb$^{-1}$ of pp collisions at $\sqrt{s}$ = 7 TeV and 20.3 fb$^{-1}$ of pp collisions at $\sqrt{s}$ = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, $m_{ll\gamma}$, is consistent with the Standard Model hypothesis in the investigated mass range of 120–150 GeV. [...]
arXiv:1402.3051; CERN-PH-EP-2014-006.- Geneva : CERN, 2014 - 20 p. - Published in : Phys. Lett. B 732 (2014) 8-27 Elsevier Open Access article: PDF; External links: Previous draft version; Preprint

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2014-01-29
15:11
Measurement of the electroweak production of dijets in association with a Z-boson and distributions sensitive to vector boson fusion in proton-proton collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector / ATLAS Collaboration
Measurements of fiducial cross sections for the electroweak production of two jets in association with a Z-boson are presented. The measurements are performed using 20.3 fb$^{-1}$ of proton-proton collision data collected at a centre-of-mass energy of $\sqrt{s}$ = 8 TeV by the ATLAS experiment at the Large Hadron Collider. [...]
arXiv:1401.7610; CERN-PH-EP-2013-227.- Geneva : CERN, 2014 - 42 p. - Published in : J. High Energy Phys. 04 (2014) 031 Springer Open Access article: PDF; External links: Previous draft version; Preprint

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2014-01-22
04:15
Search for Majorana neutrinos in $B^- \to \pi^+\mu^-\mu^-$ decays / LHCb collaboration
A search for heavy Majorana neutrinos produced in the $B^- \to \pi^+\mu^-\mu^-$ decay mode is performed using 3 fb$^{-1}$ of integrated luminosity collected with the LHCb detector in $pp$ collisions at center-of-mass energies of 7 TeV and 8 TeV at the LHC. Neutrinos with masses in the range 250-5000 MeV and lifetimes from zero to 1000 ps are probed. [...]
arXiv:1401.5361; LHCB-PAPER-2013-064; CERN-PH-EP-2014-002.- Geneva : CERN, 2014 - 6 p. - Published in : Phys. Rev. Lett. 112 (2014) 131802 APS Open Access article: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint

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2014-01-15
04:25
Updated measurements of exclusive $J/\psi$ and $\psi(2S)$ production cross-sections in $pp$ collisions at $\sqrt{s}=7$ TeV / LHCb collaboration
The differential cross-section as a function of rapidity has been measured for the exclusive production of $J/\psi$ and $\psi(2S)$ mesons in proton-proton collisions at $\sqrt{s}=7$ TeV, using data collected by the LHCb experiment, corresponding to an integrated luminosity of 930 pb$^{-1}$. The cross-sections times branching fractions to two muons having pseudorapidities between 2.0 and 4.5 are measured to be $$\begin{array}{rl} \sigma_{pp\rightarrow J/\psi\rightarrow{\mu^+}{\mu^-}}(2.0<\eta_{\mu^\pm }<4.5)=&291\pm 7\pm19 {\rm \ pb},\\ \sigma_{pp\rightarrow\psi(2S)\rightarrow{\mu^+}{\mu^-}}(2.0<\eta_{\mu^\pm}<4.5)=&6.5\pm 0.9\pm 0.4 {\rm \ pb},\end{array}$$ where the first uncertainty is statistical and the second is systematic. [...]
arXiv:1401.3288; CERN-PH-EP-2013-233; LHCB-PAPER-2013-059.- Geneva : CERN, 2014 - 17 p. - Published in : J. Phys. G 41 (2014) 055002 IOP Open Access article: PDF; Related data file(s): TAR; External link: Preprint

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2013-12-31
04:12
Measurement of the $t\bar{t}$ production cross section in the dilepton channel in pp collisions at $\sqrt{s}$=8 TeV / CMS Collaboration
The top-antitop quark ($t\bar{t}$) production cross section is measured in proton-proton collisions at $\sqrt{s}$=8 TeV with the CMS experiment at the LHC, using a data sample corresponding to an integrated luminosity of 5.3 inverse femtobarns. The measurement is performed by analysing events with a pair of electrons or muons, or one electron and one muon, and at least two jets, one of which is identified as originating from hadronisation of a bottom quark. [...]
arXiv:1312.7582; CMS-TOP-12-007; CERN-PH-EP-2013-234.- Geneva : CERN, 2014 - 29 p. - Published in : J. High Energy Phys. 02 (2014) 024 Springer Open Access article: PDF; External link: Preprint

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2013-12-19
21:34
Study of double parton scattering using W + 2-jet events in proton-proton collisions at $\sqrt{s}$ = 7 TeV / CMS Collaboration
Double parton scattering is investigated in proton-proton collisions at $\sqrt{s}$ = 7 TeV where the final state includes a W boson, which decays into a muon and a neutrino, and two jets. The data sample corresponds to an integrated luminosity of 5 inverse femtobarns, collected with the CMS detector at the LHC. [...]
arXiv:1312.5729; CMS-FSQ-12-028; CERN-PH-EP-2013-224.- Geneva : CERN, 2014 - 43 p. - Published in : J. High Energy Phys. 03 (2014) 032 Springer open Access article: PDF; External link: Preprint

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2013-12-06
19:18
Search for a Multi-Higgs Boson Cascade in $W^+W^− b\bar{b}$ events with the ATLAS detector in pp collisions at √s = 8 TeV / ATLAS Collaboration
A search is presented for new particles in an extension to the Standard Model that includes a heavy Higgs boson ($H^0$), an intermediate charged Higgs boson (H±), and a light Higgs boson ($h^0$). The analysis searches for events involving the production of a single heavy neutral Higgs boson which decays to the charged Higgs boson and a W boson, where the charged Higgs boson subsequently decays into a W boson and the lightest neutral Higgs boson decaying to a bottom-antibottom-quark pair. [...]
arXiv:1312.1956; CERN-PH-EP-2013-172.- Geneva : CERN, 2014 - 11 p. - Published in : Phys. Rev. D 89 (2014) 032002 APS Open Access article: PDF; External links: Previous draft version; Preprint

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2013-12-06
13:57
Studies of azimuthal dihadron correlations in ultra-central PbPb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV / CMS Collaboration
Azimuthal dihadron correlations of charged particles have been measured in PbPb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV by the CMS collaboration, using data from the 2011 LHC heavy-ion run. The data set includes a sample of ultra-central (0-0.2% centrality) PbPb events collected using a trigger based on total transverse energy in the hadron forward calorimeters and the total multiplicity of pixel clusters in the silicon pixel tracker. [...]
arXiv:1312.1845; CERN-PH-EP-2013-214; CMS-HIN-12-011.- Geneva : CERN, 2014 - 21 p. - Published in : J. High Energy Phys. 02 (2014) 088 Springer Open Access article: PDF; External link: Preprint

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2013-12-05
04:14
Measurement of the $\bar{B}_s^0\to D_s^-D_s^+$ and $\bar{B}_s^0\to D^-D_s^+$ effective lifetimes / LHCb collaboration
The first measurement of the effective lifetime of the $\bar{B}_s^0$ meson in the decay $\bar{B}_s^0\to D_s^-D_s^+$ is reported using a proton-proton collision dataset, corresponding to an integrated luminosity of 3 fb$^{-1}$, collected by the LHCb experiment. The measured value of the $\bar{B}_s^0\to D_s^-D_s^+$ effective lifetime is $1.379\pm0.026\pm0.017$ ps, where the uncertainties are statistical and systematic, respectively. [...]
arXiv:1312.1217; LHCB-PAPER-2013-060; CERN-PH-EP-2013-218.- Geneva : CERN, 2014 - 8 p. - Published in : Phys. Rev. Lett. 112 (2014) 111802 APS Open Access article: PDF; Related data file(s): ZIP; Supplementary related data file(s): ZIP; External link: Preprint

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2013-12-04
17:40
Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states / CMS Collaboration
A search for the standard model Higgs boson decaying to a W-boson pair at the LHC is reported. The event sample corresponds to an integrated luminosity of 4.9 and 19.4 inverse femtobarns collected with the CMS detector in pp collisions at $\sqrt{s}$ = 7 and 8 TeV, respectively. [...]
arXiv:1312.1129; CMS-HIG-13-023; CERN-PH-EP-2013-221.- Geneva : CERN, 2014 - 83 p. - Published in : J. High Energy Phys. 01 (2014) 096 Springer Open Access article: PDF; External link: Preprint

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