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Precise measurement of the $K^{\pm} \to \pi^{\pm}e^{+}e^{−}$ decay
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}=(3.1...
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Lenguaje: | eng |
Publicado: |
2009
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2009.05.040 http://cds.cern.ch/record/1167596 |
_version_ | 1780916067649978368 |
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author | Batley, J.R. Culling, A.J. Kalmus, G. Lazzeroni, C. Munday, D.J. Slater, M.W. Wotton, S.A. Arcidiacono, R. Bocquet, G. Cabibbo, N. Ceccucci, A. Cundy, D. Falaleev, V. Fidecaro, M. Gatignon, L. Gonidec, A. Kubischta, W. Norton, A. Maier, A. Patel, M. Peters, A. Balev, S. Frabetti, P.L. Goudzovski, E. Hristov, P. Kekelidze, V. Kozhuharov, V. Litov, L. Madigozhin, D. Marinova, E. Molokanova, N. Polenkevich, I. Potrebenikov, Yu. Stoynev, S. Zinchenko, A. Monnier, E. Swallow, E. Winston, R. Rubin, P. Walker, A. Baldini, W. Cotta Ramusino, A. Dalpiaz, P. Damiani, C. Fiorini, M. Gianoli, A. Martini, M. Petrucci, F. Savrie, M. Scarpa, M. Wahl, H. Bizzeti, A. Calvetti, M. Celeghini, E. Iacopini, E. Lenti, M. Martelli, F. Ruggiero, G. Veltri, M. Behler, M. Eppard, K. Kleinknecht, K. Marouelli, P. Masetti, L. Moosbrugger, U. Morales Morales, C. Renk, B. Wache, M. Wanke, R. Winhart, A. Coward, D. Dabrowski, A. Fonseca Martin, T. Shieh, M. Szleper, M. Velasco, M. Wood, M.D. Anzivino, G. Cenci, P. Imbergamo, E. Nappi, A. Pepe, M. Petrucci, M.C. Piccini, M. Raggi, M. Valdata-Nappi, M. Cerri, C. Fantechi, R. Collazuol, G. DiLella, L. Lamanna, G. Mannelli, I. Michetti, A. Costantini, F. Doble, N. Fiorini, L. Giudici, S. Pierazzini, G. Sozzi, M. Venditti, S. Bloch-Devaux, B. Cheshkov, C. Cheze, J.B. De Beer, M. Derre, J. Marel, G. Mazzucato, E. Peyaud, B. Vallage, B. Holder, M. Ziolkowski, M. Bifani, S. Biino, C. Cartiglia, N. Clemencic, M. Goy Lopez, S. Marchetto, F. Dibon, H. Jeitler, M. Markytan, M. Mikulec, I. Neuhofer, G. Widhalm, L. |
author_facet | Batley, J.R. Culling, A.J. Kalmus, G. Lazzeroni, C. Munday, D.J. Slater, M.W. Wotton, S.A. Arcidiacono, R. Bocquet, G. Cabibbo, N. Ceccucci, A. Cundy, D. Falaleev, V. Fidecaro, M. Gatignon, L. Gonidec, A. Kubischta, W. Norton, A. Maier, A. Patel, M. Peters, A. Balev, S. Frabetti, P.L. Goudzovski, E. Hristov, P. Kekelidze, V. Kozhuharov, V. Litov, L. Madigozhin, D. Marinova, E. Molokanova, N. Polenkevich, I. Potrebenikov, Yu. Stoynev, S. Zinchenko, A. Monnier, E. Swallow, E. Winston, R. Rubin, P. Walker, A. Baldini, W. Cotta Ramusino, A. Dalpiaz, P. Damiani, C. Fiorini, M. Gianoli, A. Martini, M. Petrucci, F. Savrie, M. Scarpa, M. Wahl, H. Bizzeti, A. Calvetti, M. Celeghini, E. Iacopini, E. Lenti, M. Martelli, F. Ruggiero, G. Veltri, M. Behler, M. Eppard, K. Kleinknecht, K. Marouelli, P. Masetti, L. Moosbrugger, U. Morales Morales, C. Renk, B. Wache, M. Wanke, R. Winhart, A. Coward, D. Dabrowski, A. Fonseca Martin, T. Shieh, M. Szleper, M. Velasco, M. Wood, M.D. Anzivino, G. Cenci, P. Imbergamo, E. Nappi, A. Pepe, M. Petrucci, M.C. Piccini, M. Raggi, M. Valdata-Nappi, M. Cerri, C. Fantechi, R. Collazuol, G. DiLella, L. Lamanna, G. Mannelli, I. Michetti, A. Costantini, F. Doble, N. Fiorini, L. Giudici, S. Pierazzini, G. Sozzi, M. Venditti, S. Bloch-Devaux, B. Cheshkov, C. Cheze, J.B. De Beer, M. Derre, J. Marel, G. Mazzucato, E. Peyaud, B. Vallage, B. Holder, M. Ziolkowski, M. Bifani, S. Biino, C. Cartiglia, N. Clemencic, M. Goy Lopez, S. Marchetto, F. Dibon, H. Jeitler, M. Markytan, M. Mikulec, I. Neuhofer, G. Widhalm, L. |
author_sort | Batley, J.R. |
collection | CERN |
description | 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. The shape of the form factor $W(z)$, where $z=(M_{ee}/M_K)^2$, was parameterized according to several models, and, in particular, the slope $\delta$ of the linear form factor $W(z)=W_0(1+\delta z)$ was determined to be $\delta=2.32\pm0.18$. A possible CP violating asymmetry of $K^+$ and $K^-$ decay widths was investigated, and a conservative upper limit of $2.1\times 10^{-2}$ at 90% CL was established. |
id | cern-1167596 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2009 |
record_format | invenio |
spelling | cern-11675962023-08-03T03:51:02Zdoi:10.1016/j.physletb.2009.05.040http://cds.cern.ch/record/1167596engBatley, J.R.Culling, A.J.Kalmus, G.Lazzeroni, C.Munday, D.J.Slater, M.W.Wotton, S.A.Arcidiacono, R.Bocquet, G.Cabibbo, N.Ceccucci, A.Cundy, D.Falaleev, V.Fidecaro, M.Gatignon, L.Gonidec, A.Kubischta, W.Norton, A.Maier, A.Patel, M.Peters, A.Balev, S.Frabetti, P.L.Goudzovski, E.Hristov, P.Kekelidze, V.Kozhuharov, V.Litov, L.Madigozhin, D.Marinova, E.Molokanova, N.Polenkevich, I.Potrebenikov, Yu.Stoynev, S.Zinchenko, A.Monnier, E.Swallow, E.Winston, R.Rubin, P.Walker, A.Baldini, W.Cotta Ramusino, A.Dalpiaz, P.Damiani, C.Fiorini, M.Gianoli, A.Martini, M.Petrucci, F.Savrie, M.Scarpa, M.Wahl, H.Bizzeti, A.Calvetti, M.Celeghini, E.Iacopini, E.Lenti, M.Martelli, F.Ruggiero, G.Veltri, M.Behler, M.Eppard, K.Kleinknecht, K.Marouelli, P.Masetti, L.Moosbrugger, U.Morales Morales, C.Renk, B.Wache, M.Wanke, R.Winhart, A.Coward, D.Dabrowski, A.Fonseca Martin, T.Shieh, M.Szleper, M.Velasco, M.Wood, M.D.Anzivino, G.Cenci, P.Imbergamo, E.Nappi, A.Pepe, M.Petrucci, M.C.Piccini, M.Raggi, M.Valdata-Nappi, M.Cerri, C.Fantechi, R.Collazuol, G.DiLella, L.Lamanna, G.Mannelli, I.Michetti, A.Costantini, F.Doble, N.Fiorini, L.Giudici, S.Pierazzini, G.Sozzi, M.Venditti, S.Bloch-Devaux, B.Cheshkov, C.Cheze, J.B.De Beer, M.Derre, J.Marel, G.Mazzucato, E.Peyaud, B.Vallage, B.Holder, M.Ziolkowski, M.Bifani, S.Biino, C.Cartiglia, N.Clemencic, M.Goy Lopez, S.Marchetto, F.Dibon, H.Jeitler, M.Markytan, M.Mikulec, I.Neuhofer, G.Widhalm, L.Precise measurement of the $K^{\pm} \to \pi^{\pm}e^{+}e^{−}$ decayParticle Physics - ExperimentA 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. The shape of the form factor $W(z)$, where $z=(M_{ee}/M_K)^2$, was parameterized according to several models, and, in particular, the slope $\delta$ of the linear form factor $W(z)=W_0(1+\delta z)$ was determined to be $\delta=2.32\pm0.18$. A possible CP violating asymmetry of $K^+$ and $K^-$ decay widths was investigated, and a conservative upper limit of $2.1\times 10^{-2}$ at 90% CL was established.A sample of 7253 K±→π±e+e−(γ) decay candidates with 1.0% background contamination has been collected by the NA48/2 experiment at the CERN SPS, which allowed a precise measurement of the decay properties. The branching ratio in the full kinematic range was measured to be BR=(3.11±0.12)×10−7 , where the uncertainty includes also the model dependence. The shape of the form factor W(z) , where z=(Mee/MK)2 , was parameterized according to several models, and, in particular, the slope δ of the linear form factor W(z)=W0(1+δz) was determined to be δ=2.32±0.18 . A possible CP violating asymmetry of K+ and K− decay widths was investigated, and a conservative upper limit of 2.1×10−2 at 90% CL was established.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. The shape of the form factor $W(z)$, where $z=(M_{ee}/M_K)^2$, was parameterized according to several models, and, in particular, the slope $\delta$ of the linear form factor $W(z)=W_0(1+\delta z)$ was determined to be $\delta=2.32\pm0.18$. A possible CP violating asymmetry of $K^+$ and $K^-$ decay widths was investigated, and a conservative upper limit of $2.1\times 10^{-2}$ at 90% CL was established.arXiv:0903.3130SLAC-PUB-14772CERN-PH-EP-2009-005CERN-PH-EP-2009-005oai:cds.cern.ch:11675962009-03-19 |
spellingShingle | Particle Physics - Experiment Batley, J.R. Culling, A.J. Kalmus, G. Lazzeroni, C. Munday, D.J. Slater, M.W. Wotton, S.A. Arcidiacono, R. Bocquet, G. Cabibbo, N. Ceccucci, A. Cundy, D. Falaleev, V. Fidecaro, M. Gatignon, L. Gonidec, A. Kubischta, W. Norton, A. Maier, A. Patel, M. Peters, A. Balev, S. Frabetti, P.L. Goudzovski, E. Hristov, P. Kekelidze, V. Kozhuharov, V. Litov, L. Madigozhin, D. Marinova, E. Molokanova, N. Polenkevich, I. Potrebenikov, Yu. Stoynev, S. Zinchenko, A. Monnier, E. Swallow, E. Winston, R. Rubin, P. Walker, A. Baldini, W. Cotta Ramusino, A. Dalpiaz, P. Damiani, C. Fiorini, M. Gianoli, A. Martini, M. Petrucci, F. Savrie, M. Scarpa, M. Wahl, H. Bizzeti, A. Calvetti, M. Celeghini, E. Iacopini, E. Lenti, M. Martelli, F. Ruggiero, G. Veltri, M. Behler, M. Eppard, K. Kleinknecht, K. Marouelli, P. Masetti, L. Moosbrugger, U. Morales Morales, C. Renk, B. Wache, M. Wanke, R. Winhart, A. Coward, D. Dabrowski, A. Fonseca Martin, T. Shieh, M. Szleper, M. Velasco, M. Wood, M.D. Anzivino, G. Cenci, P. Imbergamo, E. Nappi, A. Pepe, M. Petrucci, M.C. Piccini, M. Raggi, M. Valdata-Nappi, M. Cerri, C. Fantechi, R. Collazuol, G. DiLella, L. Lamanna, G. Mannelli, I. Michetti, A. Costantini, F. Doble, N. Fiorini, L. Giudici, S. Pierazzini, G. Sozzi, M. Venditti, S. Bloch-Devaux, B. Cheshkov, C. Cheze, J.B. De Beer, M. Derre, J. Marel, G. Mazzucato, E. Peyaud, B. Vallage, B. Holder, M. Ziolkowski, M. Bifani, S. Biino, C. Cartiglia, N. Clemencic, M. Goy Lopez, S. Marchetto, F. Dibon, H. Jeitler, M. Markytan, M. Mikulec, I. Neuhofer, G. Widhalm, L. Precise measurement of the $K^{\pm} \to \pi^{\pm}e^{+}e^{−}$ decay |
title | Precise measurement of the $K^{\pm} \to \pi^{\pm}e^{+}e^{−}$ decay |
title_full | Precise measurement of the $K^{\pm} \to \pi^{\pm}e^{+}e^{−}$ decay |
title_fullStr | Precise measurement of the $K^{\pm} \to \pi^{\pm}e^{+}e^{−}$ decay |
title_full_unstemmed | Precise measurement of the $K^{\pm} \to \pi^{\pm}e^{+}e^{−}$ decay |
title_short | Precise measurement of the $K^{\pm} \to \pi^{\pm}e^{+}e^{−}$ decay |
title_sort | precise measurement of the $k^{\pm} \to \pi^{\pm}e^{+}e^{−}$ decay |
topic | Particle Physics - Experiment |
url | https://dx.doi.org/10.1016/j.physletb.2009.05.040 http://cds.cern.ch/record/1167596 |
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