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The NA48/2 experiment at the CERN SPS has collected an unprecedented sample of $K^\pm\to3\pi$ decays. The high statistics and the good resolution of the detectors allow a unique investigation of the detailed phase space distributions of…

High Energy Physics - Experiment · Physics 2009-04-16 Evgueni Goudzovski

Preliminary results of study of $K^\pm\to3\pi^\pm$ decays by the NA48/2 experiment at CERN SPS are presented. They include a precise measurement of the direct CP violating charge asymmetry of Dalitz plot linear slope parameters…

High Energy Physics - Experiment · Physics 2007-05-23 Evgueni Goudzovski

A value of (-6.1 +- 0.9_{stat} +- 0.5_{syst})*10^{-3} is obtained for the quadratic slope parameter h in the K_L -> 3\pi^0 decay Dalitz plot at the NA48 experiment at the CERN SPS. The result is based on 14.7*10^6 fully reconstructed K_L ->…

High Energy Physics - Experiment · Physics 2012-08-27 NA48 Collaboration

The Dalitz plot slope parameters g, h and k for the K- -> pi0 pi0 pi- decay have been measured using in-flight decays detected with the ISTRA+ setup operating in the 25 GeV negative secondary beam of the U-70 PS. About 252 K events with…

A high precision search for direct CP-violation in K+- --> 3 pi decays was performed by the NA48/2 experiment at CERN SPS. The asymmetry in the Dalitz plot linear slopes A_g = (g^+ - g^-)/(g^+ + g^-) is measured to be A^c_g = (-1.3 +-…

High Energy Physics - Experiment · Physics 2017-08-23 Spasimir Balev

The $g$, $h$, and $k$ Dalitz plot parameters, which are coefficients in a series expansion of the squared module of the matrix element $|M(u,v)|^{2} \propto 1 + gu + hu^{2} + kv^{2}$ ($u$, $v$ are invariant variables), have been measured…

As first observed by the NA48/2 experiment at the CERN SPS, the $\p0p0$ invariant mass (M00) distribution from $\kcnn$ decay shows a cusp-like anomaly at M00=2m+, where m+ is the charged pion mass. An analysis to extract the pi pi…

High Energy Physics - Experiment · Physics 2014-11-20 J. R. Batley , A. J. Culling , G. Kalmus , C. Lazzeroni , D. J. Munday , M. W. Slater , S. A. Wotton , R. Arcidiacono , G. Bocquet , N. Cabibbo , A. Ceccucci , D. Cundy , V. Falaleev , M. Fidecaro , L. Gatignon , A. Gonidec , W. Kubischta , A. Norton , A. Maier , M. Patel , A. Peters , S. Balev , P. L. Frabetti , E. Goudzovski , P. Hristov , V. Kekelidze , V. Kozhuharov , L. Litov , D. Madigozhin , E. Marinova , N. Molokanova , I. Polenkevich , Yu. Potrebenikov , S. Stoynev , A. Zinchenko , E. Monnier , E. Swallow , R. Winston , P. Rubin , A. Walker , W. Baldini , A. Cotta Ramusino , P. Dalpiaz , C. Damiani , M. Fiorini , A. Gianoli , M. Martini , F. Petrucci , M. Savrié , M. Scarpa , H. Wahl , M. Calvetti , E. Iacopini , G. Ruggiero , A. Bizzeti , M. Lenti , M. Veltri , M. Behler , K. Eppard , K. Kleinknecht , P. Marouelli , L. Masetti , U. Moosbrugger , C. Morales Morales , B. Renk , M. Wache , R. Wanke , A. Winhart , D. Coward , A. Dabrowski , T. Fonseca Martin , M. Shieh , M. Szleper , M. Velasco , M. D. Wood , G. Anzivino , E. Imbergamo , A. Nappi , M. Piccini , M. Raggi , M. Valdata-Nappi , P. Cenci , M. Pepe , M. C. Petrucci , C. Cerri , R. Fantechi , G. Collazuol , L. DiLella , G. Lamanna , I. Mannelli , A. Michetti , F. Costantini , N. Doble , L. Fiorini , S. Giudici , G. Pierazzini , M. Sozzi , S. Venditti , B. Bloch-Devaux , C. Cheshkov , J. B. Chèze , M. De Beer , J. Derré , G. Marel , E. Mazzucato , B. Peyaud , B. Vallage , M. Holder , M. Ziolkowski , C. Biino , N. Cartiglia , F. Marchetto , S. Bifani , M. Clemencic , S. Goy Lopez , H. Dibon , M. Jeitler , M. Markytan , I. Mikulec , G. Neuhofer , L. Widhalm

Using the production reactions $pd\to {}^3\mbox{He}\,\omega$ and $pp\to pp\omega$, the Dalitz plot distribution for the $\omega \to \pi^+ \pi^- \pi^0$ decay is studied with the WASA detector at COSY, based on a combined data sample of $…

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.…

High Energy Physics - Experiment · Physics 2008-11-26 J. R. Batley

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…

High Energy Physics - Experiment · Physics 2010-11-05 2 collaboration

We present a Dalitz plot analysis of the decay D+ -> K- pi+ pi+ based on 281 pb-1 of e+e- collision data produced at the psi(3770) by CESR and observed with the CLEO-c detector. We select 67086 candidate events with a small, ~1.1%,…

High Energy Physics - Experiment · Physics 2019-08-15 G. Bonvicini

The NA48/2 has collected the largest amount of $K\to3 \pi$. The charge asymmetry parameter $A_g$, sensitive to CP violation effects, has been measured with a precision of $10^{-4}$ (preliminary) both in the three charged pion mode…

High Energy Physics - Experiment · Physics 2008-11-26 Gianluca Lamanna

We study the possible distortion of phase-space in the decays $K \to \pi \pi \pi$, which may result from final state interference among the decay products. Such distortion may influence the values of slope parameters extracted from the…

High Energy Physics - Phenomenology · Physics 2009-11-07 M. I. Martinez , G. Herrera

We perform a Dalitz plot analysis of D^+ -> K^-pi^+pi^+ decay with the CLEO-c data set of 572 pb^-1 of e^+e^- collisions accumulated at the psi(3770). This corresponds to 1.6 million D^+D^- pairs from which we select 140793 candidate events…

High Energy Physics - Experiment · Physics 2010-04-08 CLEO Collaboration , G. Bonvicini

We have studied, with the KLOE detector at the DA$\Phi$NE $\Phi$-Factory, the dynamics of the decay $\eta\to\pi^+\pi^-\pi^0$ using data from the radiative $\phi\to\eta\gamma$ decay for an integrated luminosity $L = 450 \textrm{pb^{-1}}$.…

Recent results from the experiments NA48, NA48/1 and NA48/2 are presented, including: direct CP-violation and Dalitz plot slopes measurements for K+- --> 3 pi decays; pi pi scattering effects in K+- --> pi+- pi0 pi0 and Ke4 decays, as well…

High Energy Physics - Experiment · Physics 2008-11-26 Spasimir Balev

We study the Dalitz plot of the decay D^+ --> K^- pi^+ pi^+ with a sample of 15090 events from Fermilab experiment E791. Modeling the decay amplitude as the coherent sum of known K pi resonances and a uniform nonresonant term, we do not…

High Energy Physics - Experiment · Physics 2012-08-27 E791 Collaboration

The charge asymmetry of the g, h, and k Dalitz plot parameters for $K^{\pm}\to\pi^{\pm}\pi^0\pi^0$ decays has been measured with 35 GeV/c hadron beams at the 70 GeV IHEP accelerator. The g, h and k values obtained appear to be identical for…

We report a measurement of the direct CP violation asymmetry parameter $A_g$ in charged kaon decays $K^\pm\to\pi^\pm\pi^+\pi^-$ by the NA48/2 experiment at the CERN SPS. The experiment has been designed not to be limited by systematics in…

High Energy Physics - Experiment · Physics 2012-08-27 2 Collaboration , J. R. Batley
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