<?xml version="1.0" encoding="UTF-8"?> <rss version="2.0" xmlns:media="http://search.yahoo.com/mrss/" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:opensearch="http://a9.com/-/spec/opensearch/1.1/"> <channel> <title>CERN Document Server</title> <link>https://cds.cern.ch</link> <description>CERN Document Server latest documents</description> <language>en</language> <pubDate>Sun, 23 Feb 2025 21:38:28 GMT</pubDate> <category></category> <generator>Invenio 1.1.3.1106-62468</generator> <ttl>360</ttl> <atom:link rel="self" href="/rss?f=author&amp;ln=sk&amp;p=Sch%C3%BCtz%2C+C+P" /> <opensearch:totalResults>3</opensearch:totalResults> <opensearch:startIndex>1</opensearch:startIndex> <opensearch:itemsPerPage>25</opensearch:itemsPerPage> <image> <url>https://cds.cern.ch/img/site_logo_rss.png</url> <title>CERN Document Server</title> <link>https://cds.cern.ch</link> </image> <atom:link rel="search" href="https://cds.cern.ch/opensearchdescription" type="application/opensearchdescription+xml" title="Content Search" /> <textInput> <title>Search </title> <description>Search this site:</description> <name>p</name> <link>https://cds.cern.ch/search</link> </textInput> <item> <title>Measurement of the breakup probability of pi+ pi- atoms in a nickel target with the DIRAC spectrometer</title> <link>https://cds.cern.ch/record/732756</link> <description>The DIRAC Collaboration aims to determine the lifetime of the pionium atom, a pi+pi- bound state, by measuring the breakup probability of such a bound state. This breakup probability measurement with the DIRAC spectrometer at CERN searches for an excess of pi+pi- pairs from breakup at very low relative momenta (Q &amp;lt; 4 MeV/c) on top of a dominant background coming from correlated and uncorrelated pion pairs from the proton beam - target interaction. The number of found pi+pi- pairs from breakup can be put in relation to the number of produced atoms to yield the breakup probability. The number of produced atoms is related to the number of produced pi+pi- pairs with Coulomb final state interaction through the production process. The Nickel target data amounts to the biggest measured homogeneous sample recorded by the DIRAC collaboration, which translates into a small statistical error. Systematical influences are studied and shown to be not dominant. The measurement of the breakup probability and hence the determination of the life time of pionium allows to calculate the difference between the S-wave isoscalar and isotensor pi pi scattering lengths using only quantum mechanics. This calculation can be used to cross check the prediction coming from Chiral Perturbation Theory.</description> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Sch眉tz, C P</dc:creator> <pubDate>Fri, 30 Apr 2004 01:15:45 GMT</pubDate> <dc:source xmlns:dc="http://purl.org/dc/elements/1.1/">CERN-THESIS-2004-015</dc:source> <guid>https://cds.cern.ch/record/732756</guid> <media:content xmlns:media="http://search.yahoo.com/mrss/" url="http://documents.cern.ch/cgi-bin/setlink?base=preprint&amp;categ=cern&amp;id=cern-thesis-2004-015"/> <media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://cds.cern.ch/record/732756/files/thesis-2004-015.pdf"/> <dc:title xmlns:dc="http://purl.org/dc/elements/1.1/" xml:lang="fr"/> <dc:hasPart xmlns:dc="http://purl.org/dc/elements/1.1/">2004</dc:hasPart> <dc:hasVersion xmlns:dc="http://purl.org/dc/elements/1.1/">015</dc:hasVersion> </item> <item> <title>Lifetime measurement of $\pi^{+}\pi^{-}$ and $\pi^{\pm} K^{\mp}$ atoms to test low energy QCD: Addendum to the DIRAC Proposal</title> <link>https://cds.cern.ch/record/729809</link> <description/> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Afanasiev, L G</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Berka, Z</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Brekhovskikh, V</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Caragheorgheopol, G</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Cech谩k, T</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Chiba, M</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Constantinescu, S</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Drijard, Daniel</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Dudarev, A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">D茅traz, C</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Evangelou, I</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Gallas, M V</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Gerndt, J</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Giacomich, R</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Gianotti, P</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Giardoni, M</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Gorin, A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Gortchakov, O E</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Guaraldo, C</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">G贸mez, F</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Hansroul, M</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Hosek, R</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Iliescu, M A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Jabitski, M</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Karpukhin, V V</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Kluson, J</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Kobayashi, M</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Kokkas, P</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Komarov, V</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Kruglov, V</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Kruglova, L</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Kulikov, A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Kuptsov, A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Kuroda, K I</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Lamberto, A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Lanaro, A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Lapshin, V G</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Lednicky, R</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Levi-Sandri, P</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Lucherini, V</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Manthos, N</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Nemenov, Leonid L</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Nikitin, M</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Okada, K</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Olchevskii, V</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Penescu, L</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Pentia, M</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Penzo, Aldo L</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Petrascu, C</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Pl贸, M</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Pustylnik, Z P</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Rappazzo, G F</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Riazantsev, A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Romero, A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Rykalin, V I</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Saborido, J</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Santamarina-Rios, C</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Schacher, J</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Sch眉tz, C P</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Sidorov, A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Smolik, J</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Takeutchi, F</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Tarasov, A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Tauscher, L</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Triantis, F A</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Trusov, S V</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Vlachos, S</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">V谩zquez, P</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">V谩zquez-Doce, O</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Yazkov, V</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Yoshimura, Y</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Zhabitsky, V M</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Zrelov, V P</dc:creator> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Adeva, B</dc:creator> <pubDate>Tue, 13 Apr 2004 01:00:49 GMT</pubDate> <dc:date xmlns:dc="http://purl.org/dc/elements/1.1/">21 Apr 2004</dc:date> <dc:source xmlns:dc="http://purl.org/dc/elements/1.1/">CERN-SPSC-2004-009</dc:source> <guid>https://cds.cern.ch/record/729809</guid> <media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://cds.cern.ch/record/729809/files/spsc-2004-009.pdf"/> <dc:title xmlns:dc="http://purl.org/dc/elements/1.1/" xml:lang="fr"/> <dc:hasPart xmlns:dc="http://purl.org/dc/elements/1.1/">2004</dc:hasPart> <dc:hasVersion xmlns:dc="http://purl.org/dc/elements/1.1/">009</dc:hasVersion> </item> <item> <title>The DIRAC experiment at CERN</title> <link>https://cds.cern.ch/record/622720</link> <description>The DIRAC experiment at CERN aims to measure the lifetime of the pionium atom ($A_{2\pi}$), a $\pi^+\pi^-$ bound state with an accuracy of 10%. The experimental setup consists of a high precision magnetic double arm spectrometer, located at the high intensity proton beam of the CERN Proton Synchrotron. This measurement will provide - in a model independent way - the S-wave pion scattering length difference $|a_0 - a_2|$ with 5% precision.</description> <dc:creator xmlns:dc="http://purl.org/dc/elements/1.1/">Sch眉tz, C P</dc:creator> <pubDate>Wed, 18 Jun 2003 10:17:17 GMT</pubDate> <dc:date xmlns:dc="http://purl.org/dc/elements/1.1/">12 May 2003</dc:date> <dc:source xmlns:dc="http://purl.org/dc/elements/1.1/">hep-ph/0305121</dc:source> <guid>https://cds.cern.ch/record/622720</guid> <media:content xmlns:media="http://search.yahoo.com/mrss/" url="http://documents.cern.ch/cgi-bin/setlink?base=preprint&amp;categ=hep-ph&amp;id=0305121"/> <media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://cds.cern.ch/record/622720/files/0305121.pdf"/> <media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://cds.cern.ch/record/622720/files/0305121.ps.gz"/> <dc:title xmlns:dc="http://purl.org/dc/elements/1.1/" xml:lang="fr"/> <dc:hasPart xmlns:dc="http://purl.org/dc/elements/1.1/">hep</dc:hasPart> <dc:hasVersion xmlns:dc="http://purl.org/dc/elements/1.1/">ph/0305121</dc:hasVersion> </item> </channel> </rss>