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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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Detalles Bibliográficos
Autores principales: 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.
Lenguaje:eng
Publicado: 2009
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2009.05.040
http://cds.cern.ch/record/1167596
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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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AT sozzim precisemeasurementofthekpmtopipmeedecay
AT vendittis precisemeasurementofthekpmtopipmeedecay
AT blochdevauxb precisemeasurementofthekpmtopipmeedecay
AT cheshkovc precisemeasurementofthekpmtopipmeedecay
AT chezejb precisemeasurementofthekpmtopipmeedecay
AT debeerm precisemeasurementofthekpmtopipmeedecay
AT derrej precisemeasurementofthekpmtopipmeedecay
AT marelg precisemeasurementofthekpmtopipmeedecay
AT mazzucatoe precisemeasurementofthekpmtopipmeedecay
AT peyaudb precisemeasurementofthekpmtopipmeedecay
AT vallageb precisemeasurementofthekpmtopipmeedecay
AT holderm precisemeasurementofthekpmtopipmeedecay
AT ziolkowskim precisemeasurementofthekpmtopipmeedecay
AT bifanis precisemeasurementofthekpmtopipmeedecay
AT biinoc precisemeasurementofthekpmtopipmeedecay
AT cartiglian precisemeasurementofthekpmtopipmeedecay
AT clemencicm precisemeasurementofthekpmtopipmeedecay
AT goylopezs precisemeasurementofthekpmtopipmeedecay
AT marchettof precisemeasurementofthekpmtopipmeedecay
AT dibonh precisemeasurementofthekpmtopipmeedecay
AT jeitlerm precisemeasurementofthekpmtopipmeedecay
AT markytanm precisemeasurementofthekpmtopipmeedecay
AT mikuleci precisemeasurementofthekpmtopipmeedecay
AT neuhoferg precisemeasurementofthekpmtopipmeedecay
AT widhalml precisemeasurementofthekpmtopipmeedecay