CERN Preprints

2015-04-27
10:41
 Influence of SEM-grid wire spacing and signal noise on the precision of emittance measurements / Martini, Michel CERN-PS-PA-Note-92-03. - 1992. - 8 p. Full text

2015-04-27
10:23
 Investigation of systematic errors of metastable "atomic pair" number / Yazkov, V (SINP, Moscow) Sources of systematic errors in analysis of data, collected in 2012, are analysed. [...] DIRAC-Note-2015-02. - 2015. - 6 p. Fulltext

2015-04-27
09:06
 Rates of spontaneous radiation transitions and natural lifetimes of excited states of $\pi^+ - \pi^- (A2\pi)$ atom / Ovsianniko, V D (Voronezh State U.) DIRAC-Note-2015-01. - 2015. - 6 p. Fulltext

2015-04-27
07:36
 Double-quarkonium production at a fixed-target experiment at the LHC (AFTER@LHC) / Lansberg, Jean-Philippe (Orsay, IPN) ; Shao, Hua-Sheng (CERN) We present predictions for double-quarkonium production in the kinematical region relevant for the proposed fixed-target experiment using the LHC beams (dubbed as AFTER@LHC). [...] arXiv:1504.06531 ; CERN-PH-TH-2015-094. - 2015. - 17 p. Preprint - Full text

2015-04-27
07:36
 Quantum numbers of the $X(3872)$ state and orbital angular momentum in its $\rho^0 J\psi$ decay / LHCb collaboration Angular correlations in $B^+\to X(3872) K^+$ decays, with $X(3872)\to \rho^0 J/\psi$, $\rho^0\to\pi^+\pi^-$ and $J/\psi \to\mu^+\mu^-$, are used to measure orbital angular momentum contributions and to determine the $J^{PC}$ value of the $X(3872)$ meson. [...] arXiv:1504.06339 ; LHCB-PAPER-2015-015 ; CERN-PH-EP-2015-098. - 2015. - 16 p. Preprint - Full text

2015-04-24
07:48
 ZZ production at high transverse momenta beyond NLO QCD / Campanario, Francisco (Valencia U., IFIC ; Karlsruhe, Inst. Technol.) ; Rauch, Michael (Karlsruhe, Inst. Technol.) ; Sapeta, Sebastian (CERN) We study the production of the four-lepton final state $l^+ l^- l^+ l^-$, predominantly produced by a pair of electroweak Z bosons, ZZ. [...] arXiv:1504.05588 ; CERN-PH-TH-2015-079 ; FTUV-15-0329 ; IFIC-15-22 ; KA-TP-07-2015 ; LPN15-023. - 2015. - 21 p. Preprint - Full text

2015-04-24
07:46
 Luminosity goals for a 100-TeV pp collider / Hinchliffe, Ian (LBL, Berkeley) ; Kotwal, Ashutosh (Fermilab) ; Mangano, Michelangelo L (CERN) ; Quigg, Chris (Fermilab ; Ecole Normale Superieure) ; Wang, Lian-Tao (Chicago U.) We consider diverse examples of science goals that provide a framework to assess luminosity goals for a future 100-TeV proton-proton collider.. arXiv:1504.06108 ; CERN-PH-TH-2015-089 ; FERMILAB-CONF-15-125-E-T ; LBNL-176221. - 2015. - 11 p. Preprint - Full text

2015-04-23
14:09
 Studies on heavy ion losses from collimation cleaning at the LHC / Hermes, P D (CERN ; U. Munster) ; Bruce, R (CERN) ; Jowett, J M (CERN) ; Redaelli, S (CERN) ; Salvachua, B M (CERN) ; Valentino, G (CERN) ; Wollmann, D (CERN) The LHC collimation system protects superconducting magnets from beam losses. [...] CERN-ACC-2015-0037. - 2014. - 5 p. Full text

2015-04-22
16:31
 A study of $CP$ violation in $B^\mp \rightarrow Dh^\mp$ ($h=K,\pi$) with the modes $D \rightarrow K^\mp \pi^\pm \pi^0$, $D \rightarrow \pi^+\pi^-\pi^0$ and $D \rightarrow K^+K^-\pi^0$ An analysis of the decays of $B^\mp \rightarrow D K^\mp$ and $B^\mp \rightarrow D \pi^\mp$ is presented in which the $D$ meson is reconstructed in the three-body final states $K^\mp \pi^\pm \pi^0$, $\pi^+ \pi^- \pi^0$ and $K^+ K^- \pi^0$. [...] CERN-PH-EP-2015-097 ; LHCB-PAPER-2015-014. - 2015. Fulltext - Previous draft version - Related data file(s)

2015-04-22
15:51
 RF design of the TW buncher for the CLIC drive beam injector / Shaker, Hamed (IPM, Tehran) /CTF3 collaboration The CLIC is based on the two beams concept that one beam (drive beam) produces the required RF power to accelerate another beam (main beam). The drive beam is produced and accelerated up to 50MeV inside the CLIC drive beam injector. [...] CLIC-Note-1050.- Geneva : CERN, 2015 - 21. Fulltext: PDF;