EP Preprints

Ostatnio dodane:
2016-06-24
07:38
 Multiplicity-dependent enhancement of strange and multi-strange hadron production in proton-proton collisions at $\sqrt{s} = 7$ TeV / ALICE Collaboration The yields of strange (${\rm K}^{0}_{S}$, $\Lambda$, $\bar{\Lambda}$) and multi-strange ($\Xi^{-}$, $\bar{\Xi}^{+}$, $\Omega^{-}$, $\bar{\Omega}^{+}$) hadrons are measured at midrapidity in proton-proton (pp) collisions at $\sqrt{s}$ = 7 TeV as a function of the charged-particle multiplicity density (${\rm d}N_{\rm ch}/{\rm d}\eta$).The production rate of strange particles increases faster than that of non-strange hadrons, leading to an enhancement of strange particles relative to pions, similar to that found in nucleus-nucleus collisions as well as in proton-nucleus collisions at the LHC. [...] arXiv:1606.07424 ; CERN-EP-2016-153. - 2016. - 17 p. Preprint - Full text

2016-06-23
10:04
 Evidence for exotic hadron contributions to $\Lambda^0_b \to J/\psi p \pi^-$ decays 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$^{-1}$. [...] CERN-EP-2016-151 ; LHCB-PAPER-2016-015. - 2016. Fulltext - Previous draft version - Related data file(s)

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$^{-1}$. [...] arXiv:1606.06999 ; LHCB-PAPER-2016-015 ; CERN-EP-2016-151. - 2016. Preprint - Full text

2016-06-21
07:41
 Higher harmonic flow coefficients of identified hadrons in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV / ALICE Collaboration The elliptic, triangular, quadrangular and pentagonal anisotropic flow coefficients for $\pi^{\pm}$, $\mathrm{K}^{\pm}$ and p+$\overline{\mathrm{p}}$ in Pb-Pb collisions at $\sqrt{s_\mathrm{{NN}}} = 2.76$ TeV were measured with the ALICE detector at the Large Hadron Collider. [...] arXiv:1606.06057 ; CERN-EP-2016-159. - 2016. - 40 p. Preprint - Full text

2016-06-16
08:31
 Measurements of the S-wave fraction in $B^{0}\rightarrow K^{+}\pi^{-}\mu^{+}\mu^{-}$ decays and the $B^{0}\rightarrow K^{\ast}(892)^{0}\mu^{+}\mu^{-}$ differential branching fraction / LHCb collaboration A measurement of the differential branching fraction of the decay ${B^{0}\rightarrow K^{\ast}(892)^{0}\mu^{+}\mu^{-}}$ is presented together with a determination of the S-wave fraction of the $K^+\pi^-$ system in the decay $B^{0}\rightarrow K^{+}\pi^{-}\mu^{+}\mu^{-}$. [...] arXiv:1606.04731 ; CERN-EP-2016-141 ; LHCB-PAPER-2016-012. - 2016. Preprint - Full text - Related data file(s)

2016-06-14
07:54
 Exclusive $\omega$ meson muoproduction on transversely polarised protons / Adolph, C ; Agarwala, J ; Aghasyan, M ; Akhunzyanov, R ; Alexeev, M G ; Alexeev, G D ; Amoroso, A ; Andrieux, V ; Anfimov, N V ; Anosov, V et al. Exclusive production of $\omega$ mesons was studied at the COMPASS experiment by scattering $160~\mathrm{GeV}/\mathit{c}$ muons off transversely polarised protons. [...] arXiv:1606.03725 ; CERN-EP-2016-157. - 2016. - 23 p. Preprint - Full text

2016-06-06
22:08
 SWAN: a Service for Interactive Analysis in the Cloud / Piparo, Danilo (CERN) ; Tejedor, Enric (CERN) ; Mato, Pere (CERN) ; Mascetti, Luca (CERN) ; Moscicki, Jakub (CERN) ; Lamanna, Massimo (CERN) SWAN (Service for Web based ANalysis) is a platform to perform interactive data analysis in the cloud. [...] CERN-OPEN-2016-005. - 2016. - 17 p. 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. [...] arXiv:1605.09768 ; LHCB-PAPER-2016-013 ; CERN-EP-2016-133. - 2016. - 17 p. Related data file(s) - Preprint - Full text - Related supplementary data file(s)

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 ($-3.5< \eta < 5$). [...] arXiv:1605.02035 ; CERN-EP-2016-115. - 2016. - 22 p. Preprint - Full text

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. [...] arXiv:1604.06645 ; CERN-EP-2016-101. - 2016. - 25 p. Preprint - Full text