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CERN Document Server Sök i 11 journaler efter:  1 - 10nästa  gå till journal: Sökningen tog 0.58 sekunder. 
1.
Empirical parameterization of the $K^{\pm} \to \pi^{\pm}\pi^{0}\pi^{0}$ decay Dalitz plot / NA48/2 Collaboration
As first observed by the NA48/2 experiment at the CERN SPS, the $\pi^{0}\pi^{0}$ invariant mass ($M_{00}$) distribution from $K^{\pm} \rightarrow \pi^{\pm}\pi^{0}\pi^{0}$ decay shows a cusp-like anomaly at $M_{00}=2m_{+}$, where $m_{+}$ is the charged pion mass. An analysis to extract the $\pi\pi$ scattering lengths in the isospin $I=0$ and $I=2$ states, $a_{0}$ and $a_{2}$, respectively, has been recently reported. [...]
arXiv:1004.1005.- Geneva : CERN, 2010 - 9 p. - Published in : Phys. Lett. B 686 (2010) 101-108 Fulltext: arXiv:1004.1005 - PDF; CERN-PH-EP-2009-028 - PDF; S0370269310002236 - XML; External link: Preprint
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2.
Determination of the S-wave $\pi \pi$ scattering lengths from a study of $K^{\pm} \to \pi^{\pm} \pi^{0} \pi^{0}$ decays / NA48/2 Collaboration
We report the results from a study of the full sample of $~6.031 x 10^{7} K^{\pm} \to \pi^{\pm} \pi^{0} \pi^{0}$ decays recorded by the NA48/2 experiment at the CERN SPS. As first observed in this experiment, the $\pi^{0} \pi^{0}$ invariant mass (M_00) distribution shows a cusp-like anomaly in the region around $M_{00} = 2m_{+}$, where m_{+} is the charged pion mass. [...]
arXiv:0912.2165; SLAC-PUB-14899.- Geneva : CERN, 2009 - 20 p. - Published in : Eur. Phys. J. C 64 (2009) 589-608 Fulltext: 10052_2009_1171_OnlinePDF - PDF; arXiv:0912.2165 - PDF; CERN-PH-EP-2009-010 - PDF; External link: SLAC Document Server
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3.
Precise measurement of the $K^{\pm} \to \pi^{\pm}e^{+}e^{−}$ decay / NA48/2 collaboration
A sample of 7253 $K^\pm\to\pi^\pm e^+e^-(\gamma)$ decay candidates with 1.0% background contamination has been collected by the NA48/2 experiment at the CERN SPS, allowing a precise measurement of the decay properties. The branching ratio in the full kinematic range was measured to be ${\rm BR}=(3.11\pm0.12)\times 10^{-7}$, where the uncertainty includes also the model dependence. [...]
arXiv:0903.3130; SLAC-PUB-14772; CERN-PH-EP-2009-005; CERN-PH-EP-2009-005.- Geneva : CERN, 2009 - 16 p. - Published in : Phys. Lett. B 677 (2009) 246-254 Fulltext: CERN-PH-EP-2009-005 - PDF; arXiv:0903.3130 - PDF; External link: SLAC Document Server
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4.
The magnetized steel and scintillator calorimeters of the MINOS experiment / MINOS Collaboration
The Main Injector Neutrino Oscillation Search (MINOS) experiment uses an accelerator-produced neutrino beam to perform precision measurements of the neutrino oscillation parameters in the 'atmospheric neutrino' sector associated with muon neutrino disappearance. This long-baseline experiment measures neutrino interactions in Fermilab's NuMI neutrino beam with a near detector at Fermilab and again 735 km downstream with a far detector in the Soudan Underground Laboratory in northern Minnesota. [...]
arXiv:0805.3170; FERMILAB-PUB-08-126; FERMILAB-PUB-08-126.- 2008 - 87 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 596 (2008) 190-228 Preprint: PDF;
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5.
First observation and measurement of the decay $K^{\pm} \to\pi^{\pm}e^{+}e^{-}\gamma$ / NA48/2 Collaboration
Using the full data set of the NA48/2 experiment, the decay $K^{\pm} \rightarrow \pi^{\pm} e^{+} e^{-}\gamma$ is observed for the first time, selecting 120 candidates with $7.3 \pm 1.7$ estimated background events. With $K^{\pm} \rightarrow \pi^{\pm} \pi^{0}_{D}$ as normalisation channel, the branching ratio is determined in a model-independent way to be Br$(K^{\pm} \rightarrow \pi^{\pm} e^{+} e^{-}\gamma, m_{ee\gamma} > 260$ MeV/c$^{2}) = (1.19 \pm 0.12_{stat} \pm 0.04_{syst}) \times 10^{-8}$. [...]
arXiv:0711.4313; CERN-PH-EP-2007-033; CERN-PH-EP-2007-033.- 2008 - 13 p. - Published in : Phys. Lett. B 659 (2008) 493-499 Fulltext: PDF; External link: Fulltext
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6.
New high statistics measurement of $K_{e4}$ decay form factors and $\pi\pi$ scattering phase shifts / NA48/2 Collaboration
We report results from a new measurement of the $K_{e4}$ decay $K^{\pm} \rightarrow \pi^{+}\pi^{-}e^{\pm}\nu$ by the NA48/2 collaboration at the CERN SPS, based on a partial sample of more than 670000 $K_{e4}$ decays in both charged modes collected in 2003. The form factors of the hadronic current (F, G, H) and $\pi\pi$ phase difference ($\delta=\delta_{s}-\delta_{p}$) have been measured in ten independent bins of the $\pi\pi$ mass spectrum to investigate the variation. [...]
CERN-PH-EP-2007-035.- Geneva : CERN, 2008 - 24 p. - Published in : Eur. Phys. J. C 54 (2008) 411-423 Springer Open Access article: PDF;
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7.
Search for direct CP violating charge asymmetries in $K^\pm\to\pi^\pm\pi^+\pi^-$ and $K^\pm\to\pi^\pm\pi^0\pi^0$ decays / NA48/2 Collaboration
A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes $A_g=(g^+-g^-)/(g^++g^-)$ in $K^\pm\to\pi^\pm\pi^+\pi^-$ and $K^\pm\to\pi^\pm\pi^0\pi^0$ decays by the NA48/2 experiment at CERN SPS is presented. A new technique of asymmetry measurement involving simultaneous $K^+$ and $K^-$ beams and a large data sample collected allowed a result of an unprecedented precision. [...]
arXiv:0707.0697; CERN-PH-EP-2007-021; CERN-PH-EP-2007-021.- Geneva : CERN, 2007 - 28 p. - Published in : Eur. Phys. J. C 52 (2007) 875-891 Fulltext: phep-2007-021 - PDF; arXiv:0707.0697 - PDF; External link: Fulltext
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8.
Measurement of the Dalitz plot slopes of the $K^{\pm} \to \pi^{\pm}\pi^{+}\pi^{-}$ decay / NA48/2 Collaboration
The distribution of the $K^{\pm} \to \pi^{\pm}\pi^{+}\pi^{-}$ decays in the Dalitz plot has been measured by the NA48/2 experiment at the CERN SPS with a sample of $4.71 \times 10^{8}$ fully reconstructed events. With the standard Particle Data Group parameterization the following values of the slope parameters were obtained: $g=(-21.134 \pm 0.014)$%, $h=(1.848 \pm 0.039)$%, $k=(-0.463 \pm 0.012)$%. [...]
hep-ex/0702045; CERN-PH-EP-2007-002; CERN-PH-EP-2007-002.- Geneva : CERN, 2007 - 14 p. - Published in : Phys. Lett. B 649 (2007) 349-358 Fulltext: arXiv:hep-ex_0702045 - PDF; phep-2007-002 - PDF;
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9.
Search for direct CP-violation in $K^{\pm}\to \pi^{\pm}\pi^{0}\pi^{0}$ decays / NA48/2 Collaboration
A search for direct CP-violation in K+- --> pi+-pi0pi0 decays based on 47.14 million events has been performed by the NA48/2 experiment at the CERN SPS. The asymmetry in the Dalitz plot linear slopes A_g=(g^+ - g^-)/(g^+ + g^-) is measured to be A_g=(1.8 +- 2.6).10^{-4}. [...]
hep-ex/0606007.- 2006 - 14 p. Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ex/0606007 PDF
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10.
Search for direct CP-violation in $K^{\pm} \to \pi^{\pm} \pi^{0} \pi^{0}$ decays / NA48/2 Collaboration
A search for direct CP-violation in $K^{\pm}\rightarrow \pi^\pm \pi^0 \pi^0$ decay based on 47.14 million events has been performed by the NA48/2 experiment at the CERN SPS. The asymmetry in the Dalitz plot linear slopes $A_g = ( g^+ -g^- ) / ( g^+ + g^- )$ is measured to be $A_g = (1.8 \pm 2.6) \cdot10^{-4}$. [...]
CERN-PH-EP-2006-006.- Geneva : CERN, 2006 - 14 p. - Published in : Phys. Lett. B 638 (2006) 22-29 Fulltext: PDF;
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