Academic Journal
Precision measurement of the ratio BR(KS->pi+pi-e+e-) / BR(KL->pi+pi-pi0D)
| العنوان: | Precision measurement of the ratio BR(KS->pi+pi-e+e-) / BR(KL->pi+pi-pi0D) |
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| المؤلفون: | J. R. Batley, G. E. Kalmus, C. Lazzeroni, D. J. Munday, M. Patel, M. W. Slater, S. A. Wotton, R. Arcidiacono, G. Bocquet, A. Ceccucci, D. Cundy, N. Doble, V. Falaleev, L. Gatignon, A. Gonidec, P. Grafström, W. Kubischta, F. Marchetto, I. Mikulec, A. Norton, B. Panzer Steindel, P. Rubin, H. Wahl, E. Goudzovski, P. Hristov, V. Kekelidze, V. Kozhuharov, L. Litov, D. Madigozhin, N. Molokanova, Y.u. Potrebenikov, S. Stoynev, A. Zinchenko, E. Monnier, E. C. Swallow, R. Winston, R. Sacco, A. Walker, W. Baldini, P. Dalpiaz, P. L. Frabetti, A. Gianoli, M. Martini, F. Petrucci, M. Savrié, M. Scarpa, M. Calvetti, G. Collazuol, E. Iacopini, G. Ruggiero, BIZZETI, Andrea, M. Lenti, M. Veltri, M. Behler, K. Eppard, M. Eppard, A. Hirstius, K. Kleinknecht, U. Koch, P. Marouelli, L. Masetti, U. Moosbrugger, C. Morales Morales, A. Peters, R. Wanke, A. Winhart, A. Dabrowski, T. Fonseca Martin, M. Szleper, M. Velasco, G. Anzivino, E. Imbergamo, G. Lamanna, P. Lubrano, A. Michetti, A. Nappi, M. Piccini, M. Valdata Nappi, P. Cenci, M. Pepe, M. C. Petrucci, C. Cerri, R. Fantechi, I. Mannelli, F. Costantini, L. Fiorini, S. Giudici, G. Pierazzini, M. Sozzi, C. Cheshkov, J. B. Chèze, M. De Beer, P. Debu, G. Gouge, G. Marel, E. Mazzucato, B. Peyaud, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, C. Biino, N. Cartiglia, M. Clemencic, S. Goy Lopez, E. Menichetti, N. Pastrone, W. Wislicki, H. Dibon, M. Jeitler, M. Markytan, G. Neuhofer, L. Widhalm |
| المساهمون: | J. R., Batley, G. E., Kalmu, C., Lazzeroni, D. J., Munday, M., Patel, M. W., Slater, S. A., Wotton, R., Arcidiacono, G., Bocquet, A., Ceccucci, D., Cundy, N., Doble, V., Falaleev, L., Gatignon, A., Gonidec, P., Grafström, W., Kubischta, F., Marchetto, I., Mikulec, A., Norton, B., Panzer Steindel, P., Rubin, H., Wahl, E., Goudzovski, P., Hristov, V., Kekelidze, V., Kozhuharov, L., Litov, D., Madigozhin, N., Molokanova, Potrebenikov, Y. u., S., Stoynev, A., Zinchenko, E., Monnier, E. C., Swallow, R., Winston, R., Sacco, A., Walker, W., Baldini, P., Dalpiaz, P. L., Frabetti, A., Gianoli, M., Martini, F., Petrucci, M., Savrié, M., Scarpa, M., Calvetti, G., Collazuol, E., Iacopini, G., Ruggiero, Bizzeti, Andrea, M., Lenti, M., Veltri, M., Behler, K., Eppard, M., Eppard, A., Hirstiu, K., Kleinknecht, U., Koch, P., Marouelli, L., Masetti, U., Moosbrugger, C., Morales Morale, A., Peter, R., Wanke, A., Winhart, A., Dabrowski, T., Fonseca Martin, M., Szleper, M., Velasco, G., Anzivino, E., Imbergamo, G., Lamanna, P., Lubrano, A., Michetti, A., Nappi, M., Piccini, M., Valdata Nappi, P., Cenci, M., Pepe, M. C., Petrucci, C., Cerri, R., Fantechi, I., Mannelli, F., Costantini, L., Fiorini, S., Giudici, G., Pierazzini, M., Sozzi, C., Cheshkov, J. B., Chèze, M., De Beer, P., Debu, G., Gouge, G., Marel, E., Mazzucato, B., Peyaud, B., Vallage, M., Holder, A., Maier |
| سنة النشر: | 2011 |
| المجموعة: | Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) |
| مصطلحات موضوعية: | CP-violating asymmetry, Direct emission, Inner bremsstrahlung, Kaon rare decay, Neutral kaon radiative decay |
| الوصف: | The K S → pi+ pi- e+ e- decay mode was investigated using the data collected in 2002 by the NA48/1 Collaboration. With about 23k K S → pi+ pi- e+ e- events and 59k K L → pi+ pi- pi0D normalization decays, the K S → pi+ pi- e+ e- branching ratio relative to the K L → pi+ pi- pi0D one was determined to be BR( K S → pi+ pi- e+ e- )/BR( K L → pi+ pi- pi0D ) = (3.28 ± 0.06stat ± 0.04syst ) × 10^−2 . This result was used to set the upper limit | g(E1) / g(BR) | < 3.0 at 90% CL on the presence, in the decay amplitude, of an E1 direct emission g(E1) term relative to the dominant inner bremsstrahlung g(BR) term. The CP-violating asymmetry Aφ in the sin φ cos φ distribution of K S → pi+ pi- e+ e- events, where φ is the angle between the pi+ pi- and the e+ e- decay planes in the kaon centre of mass, was found to be Aφ = (-0.4 ± 0.8)%, consistent with zero. These results are in good agreement with a description of the K S → pi+ pi- e+ e- decay amplitude dominated by the CP-even inner bremsstrahlung process. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | STAMPA |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000286494700005; volume:694; issue:4-5; firstpage:301; lastpage:309; numberofpages:9; journal:PHYSICS LETTERS. SECTION B; http://hdl.handle.net/11380/705355; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-78650304775 |
| DOI: | 10.1016/j.physletb.2010.10.008 |
| الاتاحة: | http://hdl.handle.net/11380/705355 https://doi.org/10.1016/j.physletb.2010.10.008 |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.BA3952E4 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.physletb.2010.10.008 |
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