# CERN Preprints

უკანასკნელი დამატებები:
2014-03-10
19:53
 Alignment of the CMS tracker with LHC and cosmic ray data / CMS Collaboration The central component of the CMS detector is the largest silicon tracker ever built. [...] CERN-PH-EP-2014-028 ; CMS-TRK-11-002-003 ; arXiv:1403.2286. - 2014. Additional information for the analysis - CMS AuthorList - Full text

2014-03-10
04:36
 Enhancing the ttH signal through top-quark spin polarization effects at the LHC / Biswas, S ; Frederix, R ; Gabrielli, E ; Mele, B We compare the impact of top-quark spin polarization effects in Higgs boson production in association with top-quark pairs and in corresponding backgrounds at the LHC. [...] arXiv:1403.1790 ; CERN-PH-TH-2014-037. - 2014. - 18 p. Preprint

2014-03-07
16:19
 Measurement of $\psi(2S)$ polarisation in $pp$ collisions at $\sqrt{s}=7$ TeV The polarisation of prompt $\psi(2S)$ mesons is measured by performing an angular analysis of $\psi(2S)\rightarrow \mu^{+} \mu^{-}$ decays using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb detector at a centre-of-mass energy of 7 TeV. [...] CERN-PH-EP-2014-029 ; LHCB-PAPER-2013-067. - 2014. Fulltext - Previous draft version - Related data file(s)

2014-03-07
04:28
 Gauged R-symmetry and de Sitter vacua in supergravity and string theory / Antoniadis, Ignatios ; Knoops, Rob A new class of metastable de Sitter vacua is presented and analyzed in N =1 supergravity and string theory with tunable (infinitesimally small) value of the cosmological constant. [...] arXiv:1403.1534 ; CERN-PH-TH-2014-034. - 2014. - 25 p. Preprint

2014-03-07
04:27
 Measurement of $\psi(2S)$ polarisation in $pp$ collisions at $\sqrt{s}=7$ TeV / LHCb collaboration The polarisation of prompt $\psi(2S)$ mesons is measured by performing an angular analysis of $\psi(2S)\rightarrow \mu^{+} \mu^{-}$ decays using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb detector at a centre-of-mass energy of 7 TeV. [...] arXiv:1403.1339 ; LHCB-PAPER-2013-067 CERN-PH-EP-2014-029. - 2014. Preprint

2014-03-05
05:20
 Coulomb branch Hilbert series and Hall-Littlewood polynomials / Cremonesi, Stefano (Imperial Coll., London) ; Hanany, Amihay (Imperial Coll., London) ; Mekareeya, Noppadol (CERN) ; Zaffaroni, Alberto (Milan Bicocca U. ; INFN, Milan Bicocca) There has been a recent progress in understanding the chiral ring of 3d $\mathcal{N}=4$ superconformal gauge theories by explicitly constructing an exact generating function (Hilbert series) counting BPS operators on the Coulomb branch. [...] arXiv:1403.0585 ; CERN-PH-TH-2013-278 ; IMPERIAL-TP-14-SC-01. - 2014. - 40 p. Preprint

2014-03-03
17:22
 Measurement of event-plane correlations in √s_NN = 2.76 TeV lead–lead collisions with the ATLAS detector / ATLAS Collaboration A measurement of event-plane correlations involving two or three event planes of different order is presented as a function of centrality for 7 $\mu$b$^{-1}$ Pb+Pb collision data at √s_NN = 2.76 TeV, recorded by the ATLAS experiment at the LHC. [...] CERN-PH-EP-2014-021 ; arXiv:1403.0489. - 2014. - 20 p. Previous draft version - Full text

2014-03-03
15:04
 Measurement of radiative widths of $a_2(1320)$ and $\pi_2(1670)$ / Adolph, C.; ; Akhunzyanov, R. ; Alekseev, M.G. ; Alexeev, G.D. ; Amoroso, A. ; Andrieux, V. ; Anosov, V. ; Austregesilo, A. ; Badelek, B. ; Balestra, F. et al. The COMPASS Collaboration at CERN has investigated the reaction $\pi^- \gamma \rightarrow \pi^-\pi^-\pi^+$ embedded in the Primakoff reaction of $190~\textrm{GeV}$ pions scattering in the Coulomb field of a lead target, $\pi^- \text{Pb} \rightarrow \pi^-\pi^-\pi^+ \text{Pb}$. Exchange of quasi-real photons is selected by isolating the sharp Coulomb peak observed at momentum transfer below $0.001~(\text{GeV}/c)^2$. [...] CERN-PH-EP-2014-041.- Geneva : CERN, 2014 - 27. Draft (restricted): PDF; Fulltext: PDF;

2014-02-28
04:27
 Observation of photon polarization in the $b \to s\gamma$ transition / LHCb collaboration This Letter presents a study of the flavor-changing neutral current radiative $B^{\pm} \to K^{\pm}\pi^{\mp}\pi^{\pm}\gamma$ decays performed using data collected in proton-proton collisions with the LHCb detector at $7$ and $8\,$TeV center-of-mass energies. [...] arXiv:1402.6852 ; CERN-PH-EP-2014-026 ; LHCB-PAPER-2014-001. - 2014. - 17 p. Preprint - Related data file(s) - Related supplementary data file(s)

2014-02-27
18:18
 Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in $\sqrt{s}$ = 8 $Te\kern -0.1em V$ $pp$ collisions with the ATLAS detector / ATLAS Collaboration A search for the direct production of charginos and neutralinos in final states with three leptons and missing transverse momentum is presented. [...] CERN-PH-EP-2014-019 ; arXiv:1402.7029. - 2014. - 29 p. Previous draft version - Full text