EP Articles

Senast inlagda poster:
2016-08-02
07:53
 Search for structure in the $B_s^0\pi^\pm$ invariant mass spectrum / LHCb collaboration The $B_s^0\pi^\pm$ invariant mass distribution is investigated in order to search for possible exotic meson states. The analysis is based on a data sample recorded with the LHCb detector corresponding to $3$ fb$^{-1}$ of $pp$ collision data at $\sqrt{s} = 7$ and $8$ TeV. [...] arXiv:1608.00435; LHCB-PAPER-2016-029; CERN-EP-2016-189.- Geneva : CERN, 2016 - 16 p. - Published in : Phys. Rev. Lett. 117 (2016) 152003 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplemenrary data file(s): ZIP; External link: Preprint

2016-07-21
11:31
 Measurement of the forward Z boson production cross-section in pp collisions at $\sqrt{s} = 13$ TeV / LHCb Collaboration A measurement of the production cross-section of Z bosons in pp collisions at $\sqrt{s} = 13$ TeV is presented using dimuon and dielectron final states in LHCb data. The cross-section is measured for leptons with pseudorapidities in the range $2.0 < \eta < 4.5$, transverse momenta $p_\text{T} > 20$ GeV and dilepton invariant mass in the range $60 < m(\ell\ell)<120$ GeV [...] arXiv:1607.06495; LHCB-PAPER-2016-021; CERN-EP-2016-170.- Geneva : CERN, 2016 - 32 p. - Published in : J. High Energy Phys. 09 (2016) 136 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2016-07-14
08:56
 Measurement of exclusive $\gamma\gamma\rightarrow W^+W^-$ production and search for exclusive Higgs boson production in $pp$ collisions at $\sqrt{s} = 8$ TeV using the ATLAS detector / ATLAS Collaboration Searches for exclusively produced $W$ boson pairs in the process $pp(\gamma\gamma) \rightarrow pW^+W^-p$ and exclusively produced Higgs boson in the process $pp(gg) \rightarrow pHp$ have been performed using $e^{\pm}\mu^{\mp}$ final states. These measurements use 20.2 fb$^{-1}$ of $pp$ collisions collected by the ATLAS experiment at a center-of-mass energy $\sqrt{s}=8$ TeV at the LHC. [...] arXiv:1607.03745; CERN-EP-2016-123.- Geneva : CERN, 2016 - 31 p. - Published in : Phys. Rev. D 94 (2016) 032011 APS Open Access article: PDF; Fulltext: PDF; External links: Preprint; Previous draft version

2016-07-14
08:56
 Search for high-mass new phenomena in the dilepton final state using proton--proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration A search is conducted for both resonant and non-resonant high-mass new phenomena in dielectron and dimuon final states. The search uses 3.2 fb$^{-1}$ of proton--proton collision data, collected at $\sqrt{s} = 13$ TeV by the ATLAS experiment at the LHC in 2015. [...] arXiv:1607.03669; CERN-EP-2016-116.- Geneva : CERN, 2016 - 35 p. - Published in : Phys. Lett. B 761 (2016) 372-392 Elsevier Open Access article: PDF; Fulltext: PDF; External links: Preprint; Previous draft version

2016-07-05
08:37
 Measurement of the differential cross sections for top quark pair production as a function of kinematic event variables in pp collisions at $\sqrt{s}$ = 7 and 8 TeV / CMS Collaboration Measurements are reported of the normalized differential cross sections for top quark pair production with respect to four kinematic event variables: the missing transverse energy; the scalar sum of the jet transverse momentum (pT); the scalar sum of the pT of all objects in the event; and the pT of leptonically decaying W bosons from top quark decays. The data sample, collected using the CMS detector at the LHC, consists of 5.0 inverse-femtobarns of proton-proton collisions at $\sqrt{s}$ = 7 TeV and 19.7 inverse-femtobarns at $\sqrt{s}$ = 8 TeV. [...] arXiv:1607.00837; CMS-TOP-12-042; CERN-EP-2016-139.- Geneva : CERN, 2016 - 40 p. - Published in : Phys. Rev. D 94 (2016) 052006 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint

2016-06-23
08:48
 Evidence for exotic hadron contributions to $\Lambda_b^0 \to J/\psi p \pi^-$ decays / LHCb collaboration A full amplitude analysis of $\Lambda_b^0 \to J/\psi p \pi^-$ decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV $pp$ collisions, corresponding to an integrated luminosity of 3 fb$^{-1}$. A significantly better description of the data is achieved when, in addition to the previously observed nucleon excitations $N\to p\pi^-$, either the $P_c(4380)^+$ and $P_c(4450)^+\to J/\psi p$ states, previously observed in $\Lambda_b^0 \to J/\psi p K^-$ decays, or the $Z_c(4200)^-\to J/\psi \pi^-$ state, previously reported in $B^0 \to J/\psi K^+ \pi^-$ decays, or all three, are included in the amplitude models. [...] arXiv:1606.06999; LHCB-PAPER-2016-015; CERN-EP-2016-151.- Geneva : CERN, 2016 - 33 p. - Published in : Phys. Rev. Lett. 117 (2016) 082003 - Published in : Phys. Rev. Lett. 117 (2016) 109902 APS Open Access Erratum: PDF; APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint

2016-06-01
10:16
 Measurement of the $CP$ asymmetry in $B^0_s -\overline B {^0 _s}$ mixing / LHCb Collaboration The $CP$ asymmetry in the mixing of $B_s^0$ and $\overline{B}{}_s^0$ mesons is measured in proton-proton collision data corresponding to an integrated luminosity of 3.0 fb$^{-1}$, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. Semileptonic $B_s^0$ and $\overline{B}{}_s^0$ decays are studied in the inclusive mode $D_s^{\mp} \mu^{\pm} {^(}\overline {\nu} {^)} _{\mu} X$ with the $D_s^{\mp}$ mesons reconstructed in the $K^+ K^- \pi^{\mp}$ final state. [...] arXiv:1605.09768; LHCB-PAPER-2016-013; CERN-EP-2016-133.- Geneva : CERN, 2016 - 17 p. - Published in : Phys. Rev. Lett. 117 (2016) 061803 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint

2016-05-09
07:25
 Pseudorapidity dependence of the anisotropic flow of charged particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV / ALICE Collaboration We present measurements of the elliptic ($\mathrm{v}_2$), triangular ($\mathrm{v}_3$) and quadrangular ($\mathrm{v}_4$) anisotropic azimuthal flow over a wide range of pseudorapidities ($-3.5< \eta < 5$). The measurements are performed with Pb-Pb collisions at $\sqrt{s_{\text{NN}}} = 2.76$ TeV using the ALICE detector at the Large Hadron Collider (LHC). [...] arXiv:1605.02035; CERN-EP-2016-115.- Geneva : CERN, 2016 - 22 p. - Published in : Phys. Lett. B xx (2016) xx Fulltext: PDF; External link: Preprint

2016-05-04
08:04
 Measurement of forward $W$ and $Z$ boson production in association with jets in proton-proton collisions at $\sqrt{s}=8$ TeV / LHCb collaboration The production of $W$ and $Z$ bosons in association with jets is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8~TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 $\pm$ 0.02 fb$^{-1}$. The $W$ boson is identified using its decay to a muon and a neutrino, while the $Z$ boson is identified through its decay to a muon pair. [...] arXiv:1605.00951; CERN-EP-2016-092; LHCB-PAPER-2016-011.- Geneva : CERN, 2016 - 27 p. - Published in : J. High Energy Phys. 05 (2016) 131 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2016-04-25
07:34
 Search for magnetic monopoles with the MoEDAL prototype trapping detector in 8 TeV proton-proton collisions at the LHC / MoEDAL Collaboration The MoEDAL experiment is designed to search for magnetic monopoles and other highly-ionising particles produced in high-energy collisions at the LHC. The largely passive MoEDAL detector, deployed at Interaction Point 8 on the LHC ring, relies on two dedicated direct detection techniques. [...] arXiv:1604.06645; CERN-EP-2016-101.- Geneva : CERN, 2016 - 25 p. - Published in : J. High Energy Phys. 08 (2016) 067 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint