# DIRAC Notes

2013-12-12
16:01
 T8 Beam Parameters and π+π- pairs production on Pt foil / Afanasyiev, L ; Brekhovskikh, V ; Drijard, D ; Gortchakov, O ; Nemenov, L ; Pentia, M ; Vrba, T ; Yazkov, V The PS proton beam position and beam size in the T8 channel, incident on the DIRAC target and Pt foil, have been evaluated. [...] DIRAC-NOTE-2013-02. - 2013. - 13 p. Fulltext

2013-11-14
11:37
 Investigation of systematic errors and estimation of $\pi K$ atom lifetime / Yazkov, Valeriy (SINP, Moscow) ; Zhabitsky, M (Dubna, JINR) This note describes details of analysis of data sample collected by DIRAC experiment on Ni target in 2008-2010 in order to estimate lifetime of $\pi K$ atoms. [...] DIRAC-NOTE-2013-06. - 2013. - 18 p. Fulltext

2013-11-14
11:24
 Heavy Gas efficiency for year 2010 / Doskárová, Pavla (CTU, Prague) ; Yazkov, Valeriy (SINP, Moscow) Aim of this note is investigation of the Heavy Gas efficiency for year 2010. [...] DIRAC-NOTE-2013-05. - 2013. - 8 p. Full text

2013-10-30
09:10
 Design, manufacture and measurements of permanent dipole magnets for DIRAC / Vorozhtsov, A (Dubna, JINR) ; Buzio, M (CERN) ; Kasaei, S (Inst. Stud. Theor. Phys. Math, Iran) ; Solodko, E (Dubna, JINR) ; Thonet, P A (CERN) ; Tommasini, D (CERN) The one of the aim of the DIRAC experiment is the observation of the long-lived π+π- atoms, using the proton beam of the CERN Proton Synchrotron [1]. [...] DIRAC-NOTE-2013-04. - 2013. - 9 p. Fulltext - Figures

2013-10-30
08:46
 Setup tuning using Lambda and anti-Lambda particles / Benelli, A (Dubna, JINR) ; Yazkov, V (Lomonosov Moscow State U.) In order to check the general geometry of the DIRAC experiment, we use the $\Lambda$ and $\bar{\Lambda}$ particles that decay in our setup into $p\pi^-$ and $\pi^+\bar{p}$. [...] DIRAC-NOTE-2013-03. - 2013. - 9 p. Fulltext

2013-10-30
08:36
 The description of forward permanent magnet of year 2012 run in the DIRAC software / Gorchakov, O (Dubna, JINR) For DIRAC setup run of 2011 the additional retractable permanent magnet was used. [...] DIRAC-NOTE-2013-01. - 2013. - 8 p. Fulltext

2013-03-12
14:04
 Measurement of scatterers thickness / Dudarev, Andrey (Dubna, JINR) ; Nikitin, Mikhail (Dubna, JINR) A set of different material foils is used in DIRAC experiment to define the multiple scattering parameters. [...] DIRAC-NOTE-2012-09. - 2012. - 7 p. Fulltext

2013-03-12
13:59
 Dimesoatoms and Correlation Functions in Two-Body Inclusive Reactions / Chliapnikov, P V (Serpukhov, IHEP) DIRAC-NOTE-2012-08. - 2012. - 7 p. Fulltext

2013-03-12
13:51
 Amplitude alignment for preshower detector / Pentia, M (Bucharest, IFIN-HH) ; Smolik, J (CTU, Prague) ; Yazkov, V (SINP, Moscow) The Preshower detector together with the Cherenkov Nitroge n dete ctor are used for electron - positron background rejection using amplitude information [...] DIRAC-NOTE-2012-07. - 2012. - 15 p. Fulltext

2013-03-12
13:45
 Production rates for $\pi^+ K^−, \pi^− K^+$ and $\pi^+ \pi^−$ atoms in p-Ni interactions at proton momentum 24 and 450 GeV/c / Gortchakov, O (Dubna, JINR) ; Nemenov, L (Dubna, JINR ; CERN) The results of performed analysis show that the yield of π + K − , K + π − and π + π − atoms in the p-nuclear interactions increases significantl y at change of proton momentum P p from 24 up to 450 GeV/c. [...] DIRAC-NOTE-2012-06. - 2012. - 26 p. Fulltext