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CERN Document Server Sök i 2,042 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.64 sekunder. 
1.
(100)
DIRAC : A High Resolution Spectrometer for Pionium Detection / DIRAC Collaboration
The DIRAC spectrometer has been commissioned at CERN with the aim of detecting $\pi^+ \pi^-$ atoms produced by a 24 GeV/$c$ high intensity proton beam in thin foil targets. A challenging apparatus is required to cope with the high interaction rates involved, the triggering of pion pairs with very low relative momentum, and the measurement of the latter with resolution around 0.6 MeV/$c$. [...]
hep-ex/0305022; DIRAC-PUB-2003-01.- Geneva : CERN, 2003 - 49 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 515 (2003) 467-496 Access to fulltext document: PDF; Fulltext: PDF;
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2.
(50)
DIRAC Experiment and Test of Low-Energy QCD / DIRAC Collaboration
The low-energy QCD predictions to be tested by the DIRAC experiment are revised. The experimental method, the setup characteristics and capabilities, along with first experimental results are reported. [...]
hep-ph/0001279; IFA-HEP-12-25; IFA-HEP-12-25; DIRAC-CONF-1999-06.- Bucharest : Romanian Committ. Nucl. Energy Inst. At. Phys., 2000 - 10 p. - Published in : , pp. 407-416
Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ph/0001279 PDF
In : International Symposium on Advances in Nuclear Physics, Bucharest, Romania, 9 - 10 Dec 1999, pp.407
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3.
(47)
Observation of $\pi^- K^+$ and $\pi^+ K^-$ atoms / DIRAC Collaboration
The observation of hydrogen-like $\pi K$ atoms, consisting of $\pi^- K^+$ or $\pi^+ K^-$ mesons, is presented. The atoms have been produced by 24 GeV/$c$ protons from the CERN PS accelerator, interacting with platinum or nickel foil targets. [...]
arXiv:1605.06103; CERN-EP-2016-128; DIRAC-PUB-2016-02.- Geneva : CERN, 2016-09-08 - 6 p. - Published in : Phys. Rev. Lett. 117 (2016) 112001 Draft (restricted): PDF; Fulltext: arXiv:1605.06103 - PDF; 10.1103_PhysRevLett.117.112001 - PDF; PhysRevLett.117.112001 - PDF; Preprint: PDF; External link: Fulltext
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4.
(45)
Detection of Pionium with DIRAC / DIRAC Collaboration
The aim of the DIRAC experiment at CERN is to provide an accurate determination of S-wave pion-pion scattering lengths from the measurement of the lifetime of the pi+ pi- atom. The measurement will be done with precision comparable to the level of accuracy of theoretical predictions, formulated in the context of Chiral Perturbation Theory. [...]
hep-ex/9912029; DIRAC-PUB-1999-04; DIRAC-CONF-1999-02.- Geneva : CERN, 1999 - 4 p. - Published in : piN Newslett.: 15 (1999) , pp. 270 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ex/9912029 PDF
In : 8th International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon, Zuoz, Switzerland, 15 - 20 Aug 1999, pp.270-275
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5.
(44)
Fine structure in the α decay of At218 / IS534 Collaboration
2019 - Published in : 10.1103/PhysRevC.99.064317
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6.
(42)
First measurement of the $\pi^+\pi^-$ atom lifetime / DIRAC Collaboration
The goal of the DIRAC experiment at CERN (PS212) is to measure the $\pi^+\pi^-$ atom lifetime with 10% precision. Such a measurement would yield a precision of 5% on the value of the $S$-wave $\pi\pi$ scattering lengths combination $|a_0-a_2|$. [...]
hep-ex/0504044; DIRAC-PUB-2005-01.- 2005 - 17 p. - Published in : Phys.Lett.B 619 (2005) 50-60 Fulltext: S0370269305007021 - XML; 1-s2.0-S0370269305007021-main - PDF; arXiv:hep-ex_0504044 - PDF; External link: hep-ex/0504044 PDF
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7.
(42)
QCD studies with $e^{+}e^{-}$ annihilation data at 172-189 GeV / OPAL Collaboration
We have studied hadronic events from e+e- annihilation data at centre-of-mass energies of sqrt{s}=172, 183 and 189 GeV. The total integrated luminosity of the three samples, measured with the OPAL detector, corresponds to 250 pb^-1. [...]
hep-ex/0002012; CERN-EP-99-178; CERN-EP-99-178.- Geneva : CERN, 2000 - 49 p. - Published in : Eur. Phys. J. C 16 (2000) 185-210 Fulltext: 0002012 - PDF; arXiv:hep-ex_0002012 - PDF; External link: Rivet analyses reference - Please contact the library if you need to access this document.
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8.
(41)
SEARCH FOR AN INVISIBLE VECTOR BOSON FROM $\pi^{0}$ DECAYS AT NA62 / NA62 Collaboration
The high-intensity setup, trigger system flexibility and detector performance make the NA62 experiment at CERN particularly suitable to perform direct searches for long-lived hidden-sector particles, such as dark photons, dark scalars, axion-like particles, and heavy neutral leptons, using kaon and pion decays as well as operating the experiment in dump mode. Results from NA62 will be presented on a search for $π^0$ decays to one photon and an invisible massive dark photon. [...]
2019 - 6 p. - Published in : (2019) , pp. 194-199 Fulltext: PDF;
In : International Conference on the Structure and the Interactions of the Photon, Frascati, Italy, 3 - 7 Jun 2019, pp.194-199
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9.
(41)
A Measurement of the Tau Hadronic Branching Ratios / DELPHI Collaboration
The exclusive and semi-exclusive branching ratios of the tau lepton hadronic decay modes (h- v_t, h- pi0 v_t, h- pi0 pi0 v_t, h- \geq 2pi0 v_t, h- \geq 3pi0 v_t, 2h- h+ v_t, 2h- h+ pi0 v_t, 2h- h+ \geq 2pi0 v_t, 3h- 2h+ v_t and 3h- 2h+ \geq 1pi0 v_t) were measured with data from the DELPHI detector at LEP..
hep-ex/0603044; CERN-PH-EP-2004-046; CERN-PH-EP-2004-046; DELPHI-2005-016-CONF-736.- Geneva : CERN, 2006 - 53 p. - Published in : Eur. Phys. J. C 46 (2006) 1-26 Fulltext: 0603044 - PDF; arXiv:hep-ex_0603044 - PDF; phep-2004-046 - PDF; External link: Preprint
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10.
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A Study of Cosmic Ray Secondaries Induced by the Mir Space Station Using AMS-01 / AMS Collaboration
The Alpha Magnetic Spectrometer (AMS-02) is a high energy particle physics experiment that will study cosmic rays in the $\sim 100 \mathrm{MeV}$ to $1 \mathrm{TeV}$ range and will be installed on the International Space Station (ISS) for at least 3 years. A first version of AMS-02, AMS-01, flew aboard the space shuttle \emph{Discovery} from June 2 to June 12, 1998, and collected $10^8$ cosmic ray triggers. [...]
hep-ex/0406065.- 2004 - 15 p. - Published in : Nucl. Instrum. Meth. B 234 (2005) 321-332 Access to fulltext document: PDF; Preprint: PDF; External link: hep-ex/0406065 PDF
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